./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi009_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/rfi009_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi009_power.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/rfi009_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-eb4cb34-m [2024-06-21 17:10:02,977 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:10:03,053 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:10:03,058 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:10:03,058 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:10:03,079 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:10:03,080 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:10:03,081 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:10:03,081 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:10:03,085 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:10:03,086 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:10:03,086 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:10:03,087 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:10:03,088 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:10:03,088 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:10:03,088 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:10:03,088 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:10:03,089 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:10:03,089 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:10:03,089 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:10:03,089 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:10:03,090 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:10:03,090 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:10:03,090 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:10:03,092 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:10:03,092 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:10:03,092 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:10:03,092 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:10:03,093 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:10:03,093 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:10:03,094 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:10:03,094 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:10:03,094 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:10:03,094 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:10:03,094 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:10:03,095 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:10:03,095 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:10:03,095 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:10:03,095 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:10:03,095 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:10:03,095 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:10:03,096 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:10:03,096 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:10:03,096 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:10:03,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:10:03,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:10:03,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:10:03,313 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:10:03,313 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:10:03,314 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/rfi009_power.oepc.yml/witness.yml [2024-06-21 17:10:03,641 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:10:03,641 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:10:03,642 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi009_power.oepc.i [2024-06-21 17:10:04,703 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:10:04,939 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:10:04,940 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi009_power.oepc.i [2024-06-21 17:10:04,953 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f8ccbe7b/08c38c5537814c03b70bfb6d98d806c8/FLAGef1113add [2024-06-21 17:10:04,963 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f8ccbe7b/08c38c5537814c03b70bfb6d98d806c8 [2024-06-21 17:10:04,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:10:04,965 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:10:04,965 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:10:04,966 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:10:04,969 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:10:04,970 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:10:03" (1/2) ... [2024-06-21 17:10:04,971 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@254432a4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:10:04, skipping insertion in model container [2024-06-21 17:10:04,971 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:10:03" (1/2) ... [2024-06-21 17:10:04,972 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@565f7619 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:10:04, skipping insertion in model container [2024-06-21 17:10:04,972 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:10:04" (2/2) ... [2024-06-21 17:10:04,972 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@254432a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:10:04, skipping insertion in model container [2024-06-21 17:10:04,972 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:10:04" (2/2) ... [2024-06-21 17:10:04,973 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:10:05,102 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:10:05,103 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((((((((((((((((((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-21 17:10:05,103 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((((((((((((((((((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 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$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-21 17:10:05,103 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((((((((((((((((((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-21 17:10:05,104 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:10:05,104 INFO L106 edCorrectnessWitness]: ghost_update [L851-L851] multithreaded = 1; [2024-06-21 17:10:05,142 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:10:05,506 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:10:05,513 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:10:05,650 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:10:05,689 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:10:05,690 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:10:05 WrapperNode [2024-06-21 17:10:05,690 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:10:05,691 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:10:05,691 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:10:05,692 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:10:05,697 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:10:05" (1/1) ... [2024-06-21 17:10:05,729 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:10:05" (1/1) ... [2024-06-21 17:10:05,761 INFO L138 Inliner]: procedures = 175, calls = 76, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 173 [2024-06-21 17:10:05,762 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:10:05,763 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:10:05,763 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:10:05,763 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:10:05,772 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:10:05" (1/1) ... [2024-06-21 17:10:05,772 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:10:05" (1/1) ... [2024-06-21 17:10:05,786 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:10:05" (1/1) ... [2024-06-21 17:10:05,815 INFO L175 MemorySlicer]: Split 35 memory accesses to 2 slices as follows [33, 2]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [1, 2]. The 7 writes are split as follows [7, 0]. [2024-06-21 17:10:05,816 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:10:05" (1/1) ... [2024-06-21 17:10:05,816 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:10:05" (1/1) ... [2024-06-21 17:10:05,824 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:10:05" (1/1) ... [2024-06-21 17:10:05,836 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:10:05" (1/1) ... [2024-06-21 17:10:05,839 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:10:05" (1/1) ... [2024-06-21 17:10:05,846 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:10:05" (1/1) ... [2024-06-21 17:10:05,849 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:10:05,850 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:10:05,851 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:10:05,851 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:10:05,852 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:10:05" (1/1) ... [2024-06-21 17:10:05,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:10:05,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:10:05,875 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 17:10:05,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 17:10:05,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 17:10:05,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 17:10:05,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 17:10:05,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 17:10:05,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:10:05,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:10:05,905 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:10:05,905 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:10:05,905 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:10:05,906 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:10:05,906 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:10:05,906 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:10:05,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:10:05,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 17:10:05,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:10:05,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:10:05,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:10:05,908 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:10:06,018 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:10:06,020 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:10:06,451 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:10:06,451 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:10:06,742 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:10:06,742 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:10:06,743 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:10:06 BoogieIcfgContainer [2024-06-21 17:10:06,743 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:10:06,745 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:10:06,745 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:10:06,748 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:10:06,748 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:10:03" (1/4) ... [2024-06-21 17:10:06,749 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e666d51 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:10:06, skipping insertion in model container [2024-06-21 17:10:06,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:10:04" (2/4) ... [2024-06-21 17:10:06,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e666d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:10:06, skipping insertion in model container [2024-06-21 17:10:06,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:10:05" (3/4) ... [2024-06-21 17:10:06,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e666d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:10:06, skipping insertion in model container [2024-06-21 17:10:06,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:10:06" (4/4) ... [2024-06-21 17:10:06,751 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi009_power.oepc.i [2024-06-21 17:10:06,766 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:10:06,766 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 17:10:06,766 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:10:06,827 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:10:06,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 17:10:07,002 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 17:10:07,002 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:10:07,005 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. [2024-06-21 17:10:07,006 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 17:10:07,009 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 17:10:07,022 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:10:07,028 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;@2abb2784, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:10:07,029 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 17:10:07,034 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:10:07,035 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:10:07,035 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:10:07,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:07,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:10:07,036 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:07,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:07,043 INFO L85 PathProgramCache]: Analyzing trace with hash 731981580, now seen corresponding path program 1 times [2024-06-21 17:10:07,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:07,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767468203] [2024-06-21 17:10:07,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:07,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:08,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:08,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767468203] [2024-06-21 17:10:08,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767468203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:08,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:08,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:10:08,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899615683] [2024-06-21 17:10:08,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:08,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:10:08,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:08,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:10:08,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:10:08,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 17:10:08,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:08,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:08,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 17:10:08,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:09,125 INFO L124 PetriNetUnfolderBase]: 770/1260 cut-off events. [2024-06-21 17:10:09,125 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-21 17:10:09,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2503 conditions, 1260 events. 770/1260 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6270 event pairs, 479 based on Foata normal form. 1/1232 useless extension candidates. Maximal degree in co-relation 2491. Up to 1178 conditions per place. [2024-06-21 17:10:09,136 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-21 17:10:09,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 179 flow [2024-06-21 17:10:09,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:10:09,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:10:09,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-06-21 17:10:09,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-21 17:10:09,147 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 73 transitions. [2024-06-21 17:10:09,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 179 flow [2024-06-21 17:10:09,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 17:10:09,152 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 17:10:09,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 17:10:09,156 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 17:10:09,156 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 17:10:09,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:09,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:09,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:09,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:10:09,157 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:09,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:09,158 INFO L85 PathProgramCache]: Analyzing trace with hash -939938573, now seen corresponding path program 1 times [2024-06-21 17:10:09,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:09,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025237074] [2024-06-21 17:10:09,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:09,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:11,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:11,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025237074] [2024-06-21 17:10:11,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025237074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:11,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:11,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:10:11,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401760833] [2024-06-21 17:10:11,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:11,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:10:11,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:11,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:10:11,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:10:11,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 17:10:11,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:11,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:11,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 17:10:11,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:12,066 INFO L124 PetriNetUnfolderBase]: 764/1255 cut-off events. [2024-06-21 17:10:12,067 INFO L125 PetriNetUnfolderBase]: For 245/245 co-relation queries the response was YES. [2024-06-21 17:10:12,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2861 conditions, 1255 events. 764/1255 cut-off events. For 245/245 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6264 event pairs, 369 based on Foata normal form. 3/1256 useless extension candidates. Maximal degree in co-relation 2849. Up to 1150 conditions per place. [2024-06-21 17:10:12,074 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-21 17:10:12,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 254 flow [2024-06-21 17:10:12,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:10:12,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:10:12,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-21 17:10:12,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 17:10:12,076 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 96 transitions. [2024-06-21 17:10:12,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 254 flow [2024-06-21 17:10:12,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:10:12,078 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 17:10:12,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 17:10:12,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 17:10:12,079 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 17:10:12,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:12,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:12,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:12,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:10:12,080 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:12,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:12,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1478467541, now seen corresponding path program 1 times [2024-06-21 17:10:12,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:12,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208481490] [2024-06-21 17:10:12,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:12,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:14,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:14,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208481490] [2024-06-21 17:10:14,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208481490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:14,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:14,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:10:14,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598296797] [2024-06-21 17:10:14,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:14,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:10:14,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:14,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:10:14,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:10:14,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 17:10:14,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:14,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:14,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 17:10:14,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:15,553 INFO L124 PetriNetUnfolderBase]: 969/1554 cut-off events. [2024-06-21 17:10:15,553 INFO L125 PetriNetUnfolderBase]: For 831/831 co-relation queries the response was YES. [2024-06-21 17:10:15,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3943 conditions, 1554 events. 969/1554 cut-off events. For 831/831 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7522 event pairs, 305 based on Foata normal form. 6/1555 useless extension candidates. Maximal degree in co-relation 3929. Up to 1394 conditions per place. [2024-06-21 17:10:15,560 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-21 17:10:15,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 378 flow [2024-06-21 17:10:15,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:10:15,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:10:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-21 17:10:15,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-21 17:10:15,562 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 132 transitions. [2024-06-21 17:10:15,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 378 flow [2024-06-21 17:10:15,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 358 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 17:10:15,565 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-21 17:10:15,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-21 17:10:15,566 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-21 17:10:15,566 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-21 17:10:15,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:15,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:15,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:15,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:10:15,566 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:15,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:15,567 INFO L85 PathProgramCache]: Analyzing trace with hash 169141558, now seen corresponding path program 1 times [2024-06-21 17:10:15,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:15,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60774987] [2024-06-21 17:10:15,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:15,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:16,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:16,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:16,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60774987] [2024-06-21 17:10:16,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60774987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:16,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:16,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:10:16,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315149056] [2024-06-21 17:10:16,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:16,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:10:16,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:16,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:10:16,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:10:16,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:16,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 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) [2024-06-21 17:10:16,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:16,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:16,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:17,810 INFO L124 PetriNetUnfolderBase]: 1179/1832 cut-off events. [2024-06-21 17:10:17,810 INFO L125 PetriNetUnfolderBase]: For 1821/1821 co-relation queries the response was YES. [2024-06-21 17:10:17,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5132 conditions, 1832 events. 1179/1832 cut-off events. For 1821/1821 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8617 event pairs, 492 based on Foata normal form. 2/1829 useless extension candidates. Maximal degree in co-relation 5115. Up to 1767 conditions per place. [2024-06-21 17:10:17,820 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 47 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-21 17:10:17,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 339 flow [2024-06-21 17:10:17,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:10:17,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:10:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-21 17:10:17,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 17:10:17,823 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 89 transitions. [2024-06-21 17:10:17,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 339 flow [2024-06-21 17:10:17,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 312 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:10:17,828 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-21 17:10:17,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-21 17:10:17,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-21 17:10:17,829 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-21 17:10:17,829 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) [2024-06-21 17:10:17,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:17,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:17,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:10:17,830 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:17,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:17,831 INFO L85 PathProgramCache]: Analyzing trace with hash 948422715, now seen corresponding path program 1 times [2024-06-21 17:10:17,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:17,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250790529] [2024-06-21 17:10:17,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:17,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:19,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:19,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250790529] [2024-06-21 17:10:19,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250790529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:19,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:19,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:10:19,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634486386] [2024-06-21 17:10:19,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:19,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:10:19,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:19,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:10:19,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:10:19,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:19,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:19,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:19,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:19,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:20,477 INFO L124 PetriNetUnfolderBase]: 1169/1822 cut-off events. [2024-06-21 17:10:20,478 INFO L125 PetriNetUnfolderBase]: For 2645/2645 co-relation queries the response was YES. [2024-06-21 17:10:20,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5478 conditions, 1822 events. 1169/1822 cut-off events. For 2645/2645 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8535 event pairs, 462 based on Foata normal form. 4/1826 useless extension candidates. Maximal degree in co-relation 5459. Up to 1731 conditions per place. [2024-06-21 17:10:20,488 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 53 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2024-06-21 17:10:20,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 69 transitions, 392 flow [2024-06-21 17:10:20,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:10:20,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:10:20,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 17:10:20,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 17:10:20,493 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 106 transitions. [2024-06-21 17:10:20,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 69 transitions, 392 flow [2024-06-21 17:10:20,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 69 transitions, 372 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:10:20,501 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 232 flow [2024-06-21 17:10:20,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-21 17:10:20,503 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-21 17:10:20,503 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 232 flow [2024-06-21 17:10:20,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:20,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:20,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:20,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:10:20,504 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:20,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:20,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1140382729, now seen corresponding path program 1 times [2024-06-21 17:10:20,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:20,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725787983] [2024-06-21 17:10:20,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:20,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:22,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:22,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725787983] [2024-06-21 17:10:22,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725787983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:22,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:22,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:10:22,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851013911] [2024-06-21 17:10:22,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:22,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:10:22,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:22,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:10:22,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:10:22,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:22,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:22,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:22,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:22,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:23,766 INFO L124 PetriNetUnfolderBase]: 1182/1838 cut-off events. [2024-06-21 17:10:23,767 INFO L125 PetriNetUnfolderBase]: For 3787/3791 co-relation queries the response was YES. [2024-06-21 17:10:23,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5986 conditions, 1838 events. 1182/1838 cut-off events. For 3787/3791 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8651 event pairs, 464 based on Foata normal form. 6/1844 useless extension candidates. Maximal degree in co-relation 5966. Up to 1729 conditions per place. [2024-06-21 17:10:23,777 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 16 changer transitions 0/80 dead transitions. [2024-06-21 17:10:23,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 80 transitions, 502 flow [2024-06-21 17:10:23,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:10:23,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:10:23,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 17:10:23,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-21 17:10:23,780 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 232 flow. Second operand 6 states and 113 transitions. [2024-06-21 17:10:23,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 80 transitions, 502 flow [2024-06-21 17:10:23,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 80 transitions, 472 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 17:10:23,785 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 288 flow [2024-06-21 17:10:23,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=288, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-21 17:10:23,788 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-21 17:10:23,788 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 288 flow [2024-06-21 17:10:23,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:23,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:23,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:23,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:10:23,789 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:23,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:23,789 INFO L85 PathProgramCache]: Analyzing trace with hash -647585959, now seen corresponding path program 2 times [2024-06-21 17:10:23,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:23,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580702282] [2024-06-21 17:10:23,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:23,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:25,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:25,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:25,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580702282] [2024-06-21 17:10:25,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580702282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:25,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:25,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:10:25,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96548178] [2024-06-21 17:10:25,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:25,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:10:25,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:25,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:10:25,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:10:25,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:25,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 288 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:25,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:25,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:25,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:26,947 INFO L124 PetriNetUnfolderBase]: 1177/1832 cut-off events. [2024-06-21 17:10:26,947 INFO L125 PetriNetUnfolderBase]: For 5032/5036 co-relation queries the response was YES. [2024-06-21 17:10:26,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6366 conditions, 1832 events. 1177/1832 cut-off events. For 5032/5036 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8605 event pairs, 468 based on Foata normal form. 6/1838 useless extension candidates. Maximal degree in co-relation 6345. Up to 1724 conditions per place. [2024-06-21 17:10:26,958 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 53 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-21 17:10:26,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 74 transitions, 472 flow [2024-06-21 17:10:26,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:10:26,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:10:26,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 17:10:26,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-21 17:10:26,960 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 288 flow. Second operand 6 states and 107 transitions. [2024-06-21 17:10:26,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 74 transitions, 472 flow [2024-06-21 17:10:26,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 74 transitions, 438 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 17:10:26,966 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 294 flow [2024-06-21 17:10:26,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=254, 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=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=294, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-21 17:10:26,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-21 17:10:26,967 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 294 flow [2024-06-21 17:10:26,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:26,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:26,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:26,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:10:26,967 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:26,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:26,968 INFO L85 PathProgramCache]: Analyzing trace with hash 554078556, now seen corresponding path program 1 times [2024-06-21 17:10:26,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:26,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516775987] [2024-06-21 17:10:26,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:26,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:29,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:29,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516775987] [2024-06-21 17:10:29,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516775987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:29,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:29,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:10:29,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184415532] [2024-06-21 17:10:29,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:29,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:10:29,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:29,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:10:29,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:10:29,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:29,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 294 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:29,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:29,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:29,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:31,684 INFO L124 PetriNetUnfolderBase]: 1327/2062 cut-off events. [2024-06-21 17:10:31,684 INFO L125 PetriNetUnfolderBase]: For 6383/6387 co-relation queries the response was YES. [2024-06-21 17:10:31,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7268 conditions, 2062 events. 1327/2062 cut-off events. For 6383/6387 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9790 event pairs, 469 based on Foata normal form. 10/2072 useless extension candidates. Maximal degree in co-relation 7245. Up to 1846 conditions per place. [2024-06-21 17:10:31,694 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 86 selfloop transitions, 34 changer transitions 0/125 dead transitions. [2024-06-21 17:10:31,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 125 transitions, 804 flow [2024-06-21 17:10:31,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:10:31,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:10:31,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-21 17:10:31,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41774891774891776 [2024-06-21 17:10:31,697 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 294 flow. Second operand 11 states and 193 transitions. [2024-06-21 17:10:31,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 125 transitions, 804 flow [2024-06-21 17:10:31,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 125 transitions, 748 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:10:31,703 INFO L231 Difference]: Finished difference. Result has 70 places, 79 transitions, 478 flow [2024-06-21 17:10:31,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=478, PETRI_PLACES=70, PETRI_TRANSITIONS=79} [2024-06-21 17:10:31,703 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-21 17:10:31,703 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 79 transitions, 478 flow [2024-06-21 17:10:31,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:31,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:31,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:31,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:10:31,704 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:31,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:31,705 INFO L85 PathProgramCache]: Analyzing trace with hash 894538198, now seen corresponding path program 2 times [2024-06-21 17:10:31,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:31,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633204144] [2024-06-21 17:10:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:31,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:34,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:34,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633204144] [2024-06-21 17:10:34,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633204144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:34,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:34,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:10:34,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296792721] [2024-06-21 17:10:34,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:34,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:10:34,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:34,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:10:34,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:10:34,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:34,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 79 transitions, 478 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:34,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:34,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:34,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:35,088 INFO L124 PetriNetUnfolderBase]: 1340/2087 cut-off events. [2024-06-21 17:10:35,088 INFO L125 PetriNetUnfolderBase]: For 9701/9709 co-relation queries the response was YES. [2024-06-21 17:10:35,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8372 conditions, 2087 events. 1340/2087 cut-off events. For 9701/9709 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9980 event pairs, 459 based on Foata normal form. 10/2097 useless extension candidates. Maximal degree in co-relation 8345. Up to 1916 conditions per place. [2024-06-21 17:10:35,098 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 86 selfloop transitions, 25 changer transitions 0/116 dead transitions. [2024-06-21 17:10:35,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 116 transitions, 840 flow [2024-06-21 17:10:35,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:10:35,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:10:35,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 17:10:35,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-21 17:10:35,100 INFO L175 Difference]: Start difference. First operand has 70 places, 79 transitions, 478 flow. Second operand 7 states and 129 transitions. [2024-06-21 17:10:35,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 116 transitions, 840 flow [2024-06-21 17:10:35,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 116 transitions, 824 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-21 17:10:35,108 INFO L231 Difference]: Finished difference. Result has 75 places, 84 transitions, 578 flow [2024-06-21 17:10:35,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=578, PETRI_PLACES=75, PETRI_TRANSITIONS=84} [2024-06-21 17:10:35,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-21 17:10:35,109 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 84 transitions, 578 flow [2024-06-21 17:10:35,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:35,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:35,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:35,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:10:35,110 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:35,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:35,110 INFO L85 PathProgramCache]: Analyzing trace with hash -992124704, now seen corresponding path program 3 times [2024-06-21 17:10:35,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:35,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240715364] [2024-06-21 17:10:35,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:35,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:37,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:37,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:37,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240715364] [2024-06-21 17:10:37,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240715364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:37,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:37,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:10:37,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477102375] [2024-06-21 17:10:37,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:37,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:10:37,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:37,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:10:37,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:10:37,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:37,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 84 transitions, 578 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:37,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:37,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:37,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:38,921 INFO L124 PetriNetUnfolderBase]: 1353/2112 cut-off events. [2024-06-21 17:10:38,922 INFO L125 PetriNetUnfolderBase]: For 12186/12192 co-relation queries the response was YES. [2024-06-21 17:10:38,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9046 conditions, 2112 events. 1353/2112 cut-off events. For 12186/12192 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10127 event pairs, 469 based on Foata normal form. 6/2118 useless extension candidates. Maximal degree in co-relation 9017. Up to 1872 conditions per place. [2024-06-21 17:10:38,934 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 78 selfloop transitions, 36 changer transitions 0/119 dead transitions. [2024-06-21 17:10:38,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 119 transitions, 992 flow [2024-06-21 17:10:38,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:10:38,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:10:38,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 17:10:38,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-21 17:10:38,936 INFO L175 Difference]: Start difference. First operand has 75 places, 84 transitions, 578 flow. Second operand 7 states and 131 transitions. [2024-06-21 17:10:38,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 119 transitions, 992 flow [2024-06-21 17:10:38,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 119 transitions, 926 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 17:10:38,948 INFO L231 Difference]: Finished difference. Result has 77 places, 90 transitions, 666 flow [2024-06-21 17:10:38,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=666, PETRI_PLACES=77, PETRI_TRANSITIONS=90} [2024-06-21 17:10:38,948 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-21 17:10:38,948 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 90 transitions, 666 flow [2024-06-21 17:10:38,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:38,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:38,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:38,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:10:38,949 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:38,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:38,950 INFO L85 PathProgramCache]: Analyzing trace with hash 894543034, now seen corresponding path program 1 times [2024-06-21 17:10:38,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:38,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214652267] [2024-06-21 17:10:38,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:38,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:41,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:41,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214652267] [2024-06-21 17:10:41,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214652267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:41,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:41,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:10:41,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576600343] [2024-06-21 17:10:41,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:41,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:10:41,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:41,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:10:41,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:10:41,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:41,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 90 transitions, 666 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:41,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:41,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:41,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:42,772 INFO L124 PetriNetUnfolderBase]: 1379/2163 cut-off events. [2024-06-21 17:10:42,772 INFO L125 PetriNetUnfolderBase]: For 15126/15134 co-relation queries the response was YES. [2024-06-21 17:10:42,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9631 conditions, 2163 events. 1379/2163 cut-off events. For 15126/15134 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10468 event pairs, 435 based on Foata normal form. 12/2174 useless extension candidates. Maximal degree in co-relation 9601. Up to 1919 conditions per place. [2024-06-21 17:10:42,785 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 99 selfloop transitions, 26 changer transitions 0/130 dead transitions. [2024-06-21 17:10:42,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 130 transitions, 1112 flow [2024-06-21 17:10:42,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:10:42,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:10:42,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 17:10:42,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-21 17:10:42,787 INFO L175 Difference]: Start difference. First operand has 77 places, 90 transitions, 666 flow. Second operand 7 states and 134 transitions. [2024-06-21 17:10:42,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 130 transitions, 1112 flow [2024-06-21 17:10:42,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 130 transitions, 1057 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 17:10:42,802 INFO L231 Difference]: Finished difference. Result has 81 places, 96 transitions, 733 flow [2024-06-21 17:10:42,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=733, PETRI_PLACES=81, PETRI_TRANSITIONS=96} [2024-06-21 17:10:42,803 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-21 17:10:42,803 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 96 transitions, 733 flow [2024-06-21 17:10:42,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:42,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:42,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:42,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:10:42,804 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:42,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:42,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1409504494, now seen corresponding path program 2 times [2024-06-21 17:10:42,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:42,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975056147] [2024-06-21 17:10:42,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:42,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:45,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:45,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975056147] [2024-06-21 17:10:45,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975056147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:45,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:45,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:10:45,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017113312] [2024-06-21 17:10:45,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:45,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:10:45,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:45,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:10:45,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:10:45,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:45,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 96 transitions, 733 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:45,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:45,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:45,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:46,455 INFO L124 PetriNetUnfolderBase]: 1405/2202 cut-off events. [2024-06-21 17:10:46,455 INFO L125 PetriNetUnfolderBase]: For 17855/17867 co-relation queries the response was YES. [2024-06-21 17:10:46,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10270 conditions, 2202 events. 1405/2202 cut-off events. For 17855/17867 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10600 event pairs, 425 based on Foata normal form. 16/2218 useless extension candidates. Maximal degree in co-relation 10238. Up to 1941 conditions per place. [2024-06-21 17:10:46,479 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 96 selfloop transitions, 29 changer transitions 0/130 dead transitions. [2024-06-21 17:10:46,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 130 transitions, 1153 flow [2024-06-21 17:10:46,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:10:46,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:10:46,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 17:10:46,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-21 17:10:46,481 INFO L175 Difference]: Start difference. First operand has 81 places, 96 transitions, 733 flow. Second operand 7 states and 130 transitions. [2024-06-21 17:10:46,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 130 transitions, 1153 flow [2024-06-21 17:10:46,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 130 transitions, 1112 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 17:10:46,500 INFO L231 Difference]: Finished difference. Result has 85 places, 99 transitions, 792 flow [2024-06-21 17:10:46,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=792, PETRI_PLACES=85, PETRI_TRANSITIONS=99} [2024-06-21 17:10:46,501 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-21 17:10:46,501 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 99 transitions, 792 flow [2024-06-21 17:10:46,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:46,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:46,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:46,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:10:46,502 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:46,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:46,502 INFO L85 PathProgramCache]: Analyzing trace with hash 30696034, now seen corresponding path program 4 times [2024-06-21 17:10:46,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:46,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17823965] [2024-06-21 17:10:46,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:46,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:48,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:48,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17823965] [2024-06-21 17:10:48,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17823965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:48,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:48,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:10:48,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668461700] [2024-06-21 17:10:48,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:48,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:10:48,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:48,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:10:48,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:10:48,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:48,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 99 transitions, 792 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:48,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:48,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:48,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:49,896 INFO L124 PetriNetUnfolderBase]: 1400/2188 cut-off events. [2024-06-21 17:10:49,897 INFO L125 PetriNetUnfolderBase]: For 19829/19835 co-relation queries the response was YES. [2024-06-21 17:10:49,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10458 conditions, 2188 events. 1400/2188 cut-off events. For 19829/19835 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10485 event pairs, 468 based on Foata normal form. 3/2190 useless extension candidates. Maximal degree in co-relation 10424. Up to 1943 conditions per place. [2024-06-21 17:10:49,909 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 82 selfloop transitions, 36 changer transitions 0/123 dead transitions. [2024-06-21 17:10:49,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 123 transitions, 1096 flow [2024-06-21 17:10:49,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:10:49,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:10:49,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 17:10:49,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 17:10:49,911 INFO L175 Difference]: Start difference. First operand has 85 places, 99 transitions, 792 flow. Second operand 7 states and 125 transitions. [2024-06-21 17:10:49,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 123 transitions, 1096 flow [2024-06-21 17:10:49,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 123 transitions, 995 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 17:10:49,927 INFO L231 Difference]: Finished difference. Result has 87 places, 99 transitions, 771 flow [2024-06-21 17:10:49,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=771, PETRI_PLACES=87, PETRI_TRANSITIONS=99} [2024-06-21 17:10:49,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-21 17:10:49,927 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 99 transitions, 771 flow [2024-06-21 17:10:49,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:49,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:49,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:49,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:10:49,928 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:49,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:49,928 INFO L85 PathProgramCache]: Analyzing trace with hash -814986488, now seen corresponding path program 3 times [2024-06-21 17:10:49,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:49,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116750425] [2024-06-21 17:10:49,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:49,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:52,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:52,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116750425] [2024-06-21 17:10:52,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116750425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:52,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:52,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:10:52,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206022410] [2024-06-21 17:10:52,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:52,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:10:52,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:52,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:10:52,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:10:52,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:52,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 99 transitions, 771 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:52,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:52,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:52,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:53,252 INFO L124 PetriNetUnfolderBase]: 1390/2179 cut-off events. [2024-06-21 17:10:53,252 INFO L125 PetriNetUnfolderBase]: For 21374/21386 co-relation queries the response was YES. [2024-06-21 17:10:53,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10444 conditions, 2179 events. 1390/2179 cut-off events. For 21374/21386 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10558 event pairs, 425 based on Foata normal form. 16/2195 useless extension candidates. Maximal degree in co-relation 10409. Up to 1926 conditions per place. [2024-06-21 17:10:53,269 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 92 selfloop transitions, 30 changer transitions 0/127 dead transitions. [2024-06-21 17:10:53,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 127 transitions, 1099 flow [2024-06-21 17:10:53,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:10:53,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:10:53,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 17:10:53,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:10:53,271 INFO L175 Difference]: Start difference. First operand has 87 places, 99 transitions, 771 flow. Second operand 7 states and 126 transitions. [2024-06-21 17:10:53,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 127 transitions, 1099 flow [2024-06-21 17:10:53,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 127 transitions, 987 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 17:10:53,287 INFO L231 Difference]: Finished difference. Result has 88 places, 99 transitions, 727 flow [2024-06-21 17:10:53,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=727, PETRI_PLACES=88, PETRI_TRANSITIONS=99} [2024-06-21 17:10:53,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-21 17:10:53,288 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 99 transitions, 727 flow [2024-06-21 17:10:53,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:53,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:53,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:53,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:10:53,289 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:53,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:53,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1402431871, now seen corresponding path program 1 times [2024-06-21 17:10:53,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:53,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883212732] [2024-06-21 17:10:53,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:53,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:56,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:56,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883212732] [2024-06-21 17:10:56,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883212732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:56,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:56,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:10:56,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454458341] [2024-06-21 17:10:56,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:56,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:10:56,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:56,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:10:56,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:10:56,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:56,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 99 transitions, 727 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:56,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:56,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:56,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:57,201 INFO L124 PetriNetUnfolderBase]: 1416/2229 cut-off events. [2024-06-21 17:10:57,202 INFO L125 PetriNetUnfolderBase]: For 23668/23676 co-relation queries the response was YES. [2024-06-21 17:10:57,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10759 conditions, 2229 events. 1416/2229 cut-off events. For 23668/23676 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10881 event pairs, 441 based on Foata normal form. 12/2241 useless extension candidates. Maximal degree in co-relation 10723. Up to 2000 conditions per place. [2024-06-21 17:10:57,230 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 107 selfloop transitions, 28 changer transitions 0/140 dead transitions. [2024-06-21 17:10:57,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 140 transitions, 1145 flow [2024-06-21 17:10:57,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:10:57,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:10:57,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 17:10:57,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 17:10:57,242 INFO L175 Difference]: Start difference. First operand has 88 places, 99 transitions, 727 flow. Second operand 8 states and 146 transitions. [2024-06-21 17:10:57,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 140 transitions, 1145 flow [2024-06-21 17:10:57,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 140 transitions, 1075 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 17:10:57,277 INFO L231 Difference]: Finished difference. Result has 90 places, 102 transitions, 764 flow [2024-06-21 17:10:57,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=764, PETRI_PLACES=90, PETRI_TRANSITIONS=102} [2024-06-21 17:10:57,279 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-21 17:10:57,279 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 102 transitions, 764 flow [2024-06-21 17:10:57,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:57,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:57,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:57,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:10:57,280 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:57,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:57,281 INFO L85 PathProgramCache]: Analyzing trace with hash 807693817, now seen corresponding path program 2 times [2024-06-21 17:10:57,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:57,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843168497] [2024-06-21 17:10:57,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:57,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:59,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:59,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843168497] [2024-06-21 17:10:59,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843168497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:59,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:59,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:10:59,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500354219] [2024-06-21 17:10:59,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:59,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:10:59,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:59,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:10:59,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:10:59,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:59,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 102 transitions, 764 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:59,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:59,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:59,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:01,382 INFO L124 PetriNetUnfolderBase]: 1478/2331 cut-off events. [2024-06-21 17:11:01,382 INFO L125 PetriNetUnfolderBase]: For 28214/28216 co-relation queries the response was YES. [2024-06-21 17:11:01,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11696 conditions, 2331 events. 1478/2331 cut-off events. For 28214/28216 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11487 event pairs, 411 based on Foata normal form. 4/2334 useless extension candidates. Maximal degree in co-relation 11659. Up to 1827 conditions per place. [2024-06-21 17:11:01,397 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 92 selfloop transitions, 54 changer transitions 0/151 dead transitions. [2024-06-21 17:11:01,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 151 transitions, 1412 flow [2024-06-21 17:11:01,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:11:01,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:11:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 17:11:01,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 17:11:01,401 INFO L175 Difference]: Start difference. First operand has 90 places, 102 transitions, 764 flow. Second operand 8 states and 156 transitions. [2024-06-21 17:11:01,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 151 transitions, 1412 flow [2024-06-21 17:11:01,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 151 transitions, 1331 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 17:11:01,423 INFO L231 Difference]: Finished difference. Result has 92 places, 111 transitions, 931 flow [2024-06-21 17:11:01,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=931, PETRI_PLACES=92, PETRI_TRANSITIONS=111} [2024-06-21 17:11:01,423 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-21 17:11:01,423 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 111 transitions, 931 flow [2024-06-21 17:11:01,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:01,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:01,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:01,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:11:01,424 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:01,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:01,424 INFO L85 PathProgramCache]: Analyzing trace with hash -691093039, now seen corresponding path program 3 times [2024-06-21 17:11:01,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:01,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778463731] [2024-06-21 17:11:01,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:01,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:03,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:03,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778463731] [2024-06-21 17:11:03,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778463731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:03,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:03,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:03,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645428027] [2024-06-21 17:11:03,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:03,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:03,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:03,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:03,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:03,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:03,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 111 transitions, 931 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:03,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:03,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:03,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:05,310 INFO L124 PetriNetUnfolderBase]: 1468/2317 cut-off events. [2024-06-21 17:11:05,311 INFO L125 PetriNetUnfolderBase]: For 31791/31793 co-relation queries the response was YES. [2024-06-21 17:11:05,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12029 conditions, 2317 events. 1468/2317 cut-off events. For 31791/31793 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11405 event pairs, 409 based on Foata normal form. 4/2320 useless extension candidates. Maximal degree in co-relation 11991. Up to 1819 conditions per place. [2024-06-21 17:11:05,322 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 93 selfloop transitions, 52 changer transitions 0/150 dead transitions. [2024-06-21 17:11:05,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 150 transitions, 1391 flow [2024-06-21 17:11:05,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:11:05,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:11:05,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 17:11:05,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 17:11:05,326 INFO L175 Difference]: Start difference. First operand has 92 places, 111 transitions, 931 flow. Second operand 8 states and 156 transitions. [2024-06-21 17:11:05,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 150 transitions, 1391 flow [2024-06-21 17:11:05,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 150 transitions, 1304 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 17:11:05,351 INFO L231 Difference]: Finished difference. Result has 97 places, 111 transitions, 956 flow [2024-06-21 17:11:05,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=956, PETRI_PLACES=97, PETRI_TRANSITIONS=111} [2024-06-21 17:11:05,352 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-21 17:11:05,352 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 111 transitions, 956 flow [2024-06-21 17:11:05,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:05,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:05,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:05,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:11:05,353 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:05,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:05,354 INFO L85 PathProgramCache]: Analyzing trace with hash 440200371, now seen corresponding path program 4 times [2024-06-21 17:11:05,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:05,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053121868] [2024-06-21 17:11:05,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:05,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:05,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:07,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:07,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053121868] [2024-06-21 17:11:07,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053121868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:07,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:07,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:07,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559195524] [2024-06-21 17:11:07,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:07,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:07,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:07,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:07,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:07,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:07,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 111 transitions, 956 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:07,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:07,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:07,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:09,431 INFO L124 PetriNetUnfolderBase]: 1494/2364 cut-off events. [2024-06-21 17:11:09,432 INFO L125 PetriNetUnfolderBase]: For 35233/35239 co-relation queries the response was YES. [2024-06-21 17:11:09,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12530 conditions, 2364 events. 1494/2364 cut-off events. For 35233/35239 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11745 event pairs, 412 based on Foata normal form. 5/2368 useless extension candidates. Maximal degree in co-relation 12490. Up to 1841 conditions per place. [2024-06-21 17:11:09,445 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 88 selfloop transitions, 56 changer transitions 0/149 dead transitions. [2024-06-21 17:11:09,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 149 transitions, 1462 flow [2024-06-21 17:11:09,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:11:09,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:11:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 17:11:09,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 17:11:09,448 INFO L175 Difference]: Start difference. First operand has 97 places, 111 transitions, 956 flow. Second operand 8 states and 150 transitions. [2024-06-21 17:11:09,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 149 transitions, 1462 flow [2024-06-21 17:11:09,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 149 transitions, 1333 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 17:11:09,468 INFO L231 Difference]: Finished difference. Result has 98 places, 114 transitions, 1001 flow [2024-06-21 17:11:09,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1001, PETRI_PLACES=98, PETRI_TRANSITIONS=114} [2024-06-21 17:11:09,469 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-21 17:11:09,469 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 114 transitions, 1001 flow [2024-06-21 17:11:09,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:09,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:09,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:09,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:11:09,470 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:09,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:09,470 INFO L85 PathProgramCache]: Analyzing trace with hash -2134633701, now seen corresponding path program 5 times [2024-06-21 17:11:09,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:09,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187073996] [2024-06-21 17:11:09,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:09,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:12,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:12,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187073996] [2024-06-21 17:11:12,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187073996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:12,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:12,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:12,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070742984] [2024-06-21 17:11:12,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:12,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:12,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:12,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:12,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:12,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:12,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 114 transitions, 1001 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:12,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:12,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:12,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:13,621 INFO L124 PetriNetUnfolderBase]: 1520/2414 cut-off events. [2024-06-21 17:11:13,622 INFO L125 PetriNetUnfolderBase]: For 38471/38477 co-relation queries the response was YES. [2024-06-21 17:11:13,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12931 conditions, 2414 events. 1520/2414 cut-off events. For 38471/38477 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12095 event pairs, 412 based on Foata normal form. 5/2418 useless extension candidates. Maximal degree in co-relation 12890. Up to 1863 conditions per place. [2024-06-21 17:11:13,633 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 89 selfloop transitions, 58 changer transitions 0/152 dead transitions. [2024-06-21 17:11:13,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 152 transitions, 1517 flow [2024-06-21 17:11:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:11:13,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:11:13,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 17:11:13,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 17:11:13,635 INFO L175 Difference]: Start difference. First operand has 98 places, 114 transitions, 1001 flow. Second operand 8 states and 151 transitions. [2024-06-21 17:11:13,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 152 transitions, 1517 flow [2024-06-21 17:11:13,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 152 transitions, 1331 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 17:11:13,656 INFO L231 Difference]: Finished difference. Result has 100 places, 117 transitions, 993 flow [2024-06-21 17:11:13,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=993, PETRI_PLACES=100, PETRI_TRANSITIONS=117} [2024-06-21 17:11:13,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-21 17:11:13,657 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 117 transitions, 993 flow [2024-06-21 17:11:13,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:13,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:13,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:13,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:11:13,657 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:13,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:13,658 INFO L85 PathProgramCache]: Analyzing trace with hash 512374015, now seen corresponding path program 6 times [2024-06-21 17:11:13,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:13,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387202408] [2024-06-21 17:11:13,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:13,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:16,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:16,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387202408] [2024-06-21 17:11:16,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387202408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:16,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:16,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:16,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986511254] [2024-06-21 17:11:16,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:16,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:16,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:16,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:16,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:16,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:16,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 117 transitions, 993 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:16,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:16,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:16,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:17,380 INFO L124 PetriNetUnfolderBase]: 1510/2400 cut-off events. [2024-06-21 17:11:17,381 INFO L125 PetriNetUnfolderBase]: For 39639/39645 co-relation queries the response was YES. [2024-06-21 17:11:17,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12776 conditions, 2400 events. 1510/2400 cut-off events. For 39639/39645 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12018 event pairs, 418 based on Foata normal form. 5/2404 useless extension candidates. Maximal degree in co-relation 12734. Up to 1855 conditions per place. [2024-06-21 17:11:17,393 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 82 selfloop transitions, 62 changer transitions 0/149 dead transitions. [2024-06-21 17:11:17,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 149 transitions, 1369 flow [2024-06-21 17:11:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:11:17,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:11:17,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 17:11:17,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 17:11:17,395 INFO L175 Difference]: Start difference. First operand has 100 places, 117 transitions, 993 flow. Second operand 8 states and 146 transitions. [2024-06-21 17:11:17,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 149 transitions, 1369 flow [2024-06-21 17:11:17,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 149 transitions, 1217 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 17:11:17,417 INFO L231 Difference]: Finished difference. Result has 103 places, 117 transitions, 973 flow [2024-06-21 17:11:17,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=973, PETRI_PLACES=103, PETRI_TRANSITIONS=117} [2024-06-21 17:11:17,417 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-21 17:11:17,417 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 117 transitions, 973 flow [2024-06-21 17:11:17,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:17,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:17,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:17,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:11:17,419 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:17,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:17,419 INFO L85 PathProgramCache]: Analyzing trace with hash 512651062, now seen corresponding path program 1 times [2024-06-21 17:11:17,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:17,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623431941] [2024-06-21 17:11:17,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:17,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:19,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:19,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623431941] [2024-06-21 17:11:19,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623431941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:19,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:19,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:19,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88853357] [2024-06-21 17:11:19,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:19,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:19,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:19,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:19,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:19,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:19,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 117 transitions, 973 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:19,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:19,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:19,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:21,111 INFO L124 PetriNetUnfolderBase]: 1502/2387 cut-off events. [2024-06-21 17:11:21,111 INFO L125 PetriNetUnfolderBase]: For 41382/41384 co-relation queries the response was YES. [2024-06-21 17:11:21,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12704 conditions, 2387 events. 1502/2387 cut-off events. For 41382/41384 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11985 event pairs, 424 based on Foata normal form. 4/2391 useless extension candidates. Maximal degree in co-relation 12661. Up to 2194 conditions per place. [2024-06-21 17:11:21,126 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 131 selfloop transitions, 16 changer transitions 0/152 dead transitions. [2024-06-21 17:11:21,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 152 transitions, 1402 flow [2024-06-21 17:11:21,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:11:21,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:11:21,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:11:21,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 17:11:21,143 INFO L175 Difference]: Start difference. First operand has 103 places, 117 transitions, 973 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:11:21,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 152 transitions, 1402 flow [2024-06-21 17:11:21,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 152 transitions, 1249 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 17:11:21,173 INFO L231 Difference]: Finished difference. Result has 104 places, 122 transitions, 920 flow [2024-06-21 17:11:21,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=920, PETRI_PLACES=104, PETRI_TRANSITIONS=122} [2024-06-21 17:11:21,173 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-21 17:11:21,173 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 122 transitions, 920 flow [2024-06-21 17:11:21,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:21,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:21,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:21,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:11:21,174 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:21,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:21,174 INFO L85 PathProgramCache]: Analyzing trace with hash -731362686, now seen corresponding path program 1 times [2024-06-21 17:11:21,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:21,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011923485] [2024-06-21 17:11:21,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:21,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:22,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:22,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011923485] [2024-06-21 17:11:22,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011923485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:22,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:22,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:11:22,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916083413] [2024-06-21 17:11:22,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:22,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:11:22,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:22,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:11:22,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:11:22,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 17:11:22,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 122 transitions, 920 flow. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:22,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:22,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 17:11:22,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:23,183 INFO L124 PetriNetUnfolderBase]: 1241/2081 cut-off events. [2024-06-21 17:11:23,184 INFO L125 PetriNetUnfolderBase]: For 42057/42084 co-relation queries the response was YES. [2024-06-21 17:11:23,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11325 conditions, 2081 events. 1241/2081 cut-off events. For 42057/42084 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11072 event pairs, 381 based on Foata normal form. 15/2070 useless extension candidates. Maximal degree in co-relation 11280. Up to 1810 conditions per place. [2024-06-21 17:11:23,196 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 105 selfloop transitions, 8 changer transitions 0/136 dead transitions. [2024-06-21 17:11:23,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 136 transitions, 1200 flow [2024-06-21 17:11:23,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:11:23,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:11:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-21 17:11:23,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 17:11:23,198 INFO L175 Difference]: Start difference. First operand has 104 places, 122 transitions, 920 flow. Second operand 5 states and 93 transitions. [2024-06-21 17:11:23,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 136 transitions, 1200 flow [2024-06-21 17:11:23,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 136 transitions, 1145 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 17:11:23,221 INFO L231 Difference]: Finished difference. Result has 104 places, 125 transitions, 917 flow [2024-06-21 17:11:23,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=917, PETRI_PLACES=104, PETRI_TRANSITIONS=125} [2024-06-21 17:11:23,222 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-21 17:11:23,222 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 125 transitions, 917 flow [2024-06-21 17:11:23,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:23,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:23,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:23,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:11:23,222 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:23,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:23,223 INFO L85 PathProgramCache]: Analyzing trace with hash -67199075, now seen corresponding path program 1 times [2024-06-21 17:11:23,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:23,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821579393] [2024-06-21 17:11:23,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:23,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:26,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:26,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821579393] [2024-06-21 17:11:26,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821579393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:26,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:26,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:26,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195334107] [2024-06-21 17:11:26,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:26,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:26,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:26,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:26,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:26,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:26,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 125 transitions, 917 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:26,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:26,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:26,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:27,645 INFO L124 PetriNetUnfolderBase]: 1544/2461 cut-off events. [2024-06-21 17:11:27,645 INFO L125 PetriNetUnfolderBase]: For 48015/48023 co-relation queries the response was YES. [2024-06-21 17:11:27,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13493 conditions, 2461 events. 1544/2461 cut-off events. For 48015/48023 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12464 event pairs, 283 based on Foata normal form. 12/2473 useless extension candidates. Maximal degree in co-relation 13447. Up to 2106 conditions per place. [2024-06-21 17:11:27,658 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 139 selfloop transitions, 31 changer transitions 0/175 dead transitions. [2024-06-21 17:11:27,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 175 transitions, 1553 flow [2024-06-21 17:11:27,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:27,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:27,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 17:11:27,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 17:11:27,674 INFO L175 Difference]: Start difference. First operand has 104 places, 125 transitions, 917 flow. Second operand 9 states and 164 transitions. [2024-06-21 17:11:27,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 175 transitions, 1553 flow [2024-06-21 17:11:27,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 175 transitions, 1523 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 17:11:27,714 INFO L231 Difference]: Finished difference. Result has 110 places, 129 transitions, 1036 flow [2024-06-21 17:11:27,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1036, PETRI_PLACES=110, PETRI_TRANSITIONS=129} [2024-06-21 17:11:27,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-21 17:11:27,718 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 129 transitions, 1036 flow [2024-06-21 17:11:27,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:27,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:27,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:27,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:11:27,719 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:27,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:27,740 INFO L85 PathProgramCache]: Analyzing trace with hash 657798965, now seen corresponding path program 2 times [2024-06-21 17:11:27,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:27,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83569852] [2024-06-21 17:11:27,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:27,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:30,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:30,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83569852] [2024-06-21 17:11:30,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83569852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:30,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:30,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:30,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351302654] [2024-06-21 17:11:30,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:30,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:30,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:30,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:30,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:30,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:30,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 129 transitions, 1036 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:30,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:30,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:30,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:31,621 INFO L124 PetriNetUnfolderBase]: 1536/2449 cut-off events. [2024-06-21 17:11:31,621 INFO L125 PetriNetUnfolderBase]: For 51683/51691 co-relation queries the response was YES. [2024-06-21 17:11:31,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13744 conditions, 2449 events. 1536/2449 cut-off events. For 51683/51691 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12441 event pairs, 391 based on Foata normal form. 12/2461 useless extension candidates. Maximal degree in co-relation 13697. Up to 2182 conditions per place. [2024-06-21 17:11:31,638 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 135 selfloop transitions, 27 changer transitions 0/167 dead transitions. [2024-06-21 17:11:31,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 167 transitions, 1472 flow [2024-06-21 17:11:31,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:11:31,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:11:31,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:11:31,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 17:11:31,640 INFO L175 Difference]: Start difference. First operand has 110 places, 129 transitions, 1036 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:11:31,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 167 transitions, 1472 flow [2024-06-21 17:11:31,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 167 transitions, 1374 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 17:11:31,686 INFO L231 Difference]: Finished difference. Result has 113 places, 129 transitions, 1000 flow [2024-06-21 17:11:31,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1000, PETRI_PLACES=113, PETRI_TRANSITIONS=129} [2024-06-21 17:11:31,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-21 17:11:31,687 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 129 transitions, 1000 flow [2024-06-21 17:11:31,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:31,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:31,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:31,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:11:31,688 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:31,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:31,688 INFO L85 PathProgramCache]: Analyzing trace with hash 50949055, now seen corresponding path program 3 times [2024-06-21 17:11:31,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:31,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420267170] [2024-06-21 17:11:31,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:31,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:34,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:34,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420267170] [2024-06-21 17:11:34,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420267170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:34,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:34,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:34,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895632043] [2024-06-21 17:11:34,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:34,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:34,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:34,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:34,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:34,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:34,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 129 transitions, 1000 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:34,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:34,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:34,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:35,883 INFO L124 PetriNetUnfolderBase]: 1556/2479 cut-off events. [2024-06-21 17:11:35,883 INFO L125 PetriNetUnfolderBase]: For 56074/56078 co-relation queries the response was YES. [2024-06-21 17:11:35,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13996 conditions, 2479 events. 1556/2479 cut-off events. For 56074/56078 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12565 event pairs, 401 based on Foata normal form. 6/2485 useless extension candidates. Maximal degree in co-relation 13947. Up to 2159 conditions per place. [2024-06-21 17:11:35,900 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 121 selfloop transitions, 38 changer transitions 0/164 dead transitions. [2024-06-21 17:11:35,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 164 transitions, 1452 flow [2024-06-21 17:11:35,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:11:35,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:11:35,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:11:35,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 17:11:35,902 INFO L175 Difference]: Start difference. First operand has 113 places, 129 transitions, 1000 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:11:35,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 164 transitions, 1452 flow [2024-06-21 17:11:35,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 164 transitions, 1391 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 17:11:35,947 INFO L231 Difference]: Finished difference. Result has 114 places, 131 transitions, 1068 flow [2024-06-21 17:11:35,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=939, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1068, PETRI_PLACES=114, PETRI_TRANSITIONS=131} [2024-06-21 17:11:35,948 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-21 17:11:35,948 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 131 transitions, 1068 flow [2024-06-21 17:11:35,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:35,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:35,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:35,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:11:35,949 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:35,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:35,949 INFO L85 PathProgramCache]: Analyzing trace with hash -630648925, now seen corresponding path program 4 times [2024-06-21 17:11:35,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:35,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596203090] [2024-06-21 17:11:35,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:35,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:38,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:38,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596203090] [2024-06-21 17:11:38,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596203090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:38,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:38,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:38,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359732736] [2024-06-21 17:11:38,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:38,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:38,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:38,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:38,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:38,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:38,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 131 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) [2024-06-21 17:11:38,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:38,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:38,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:39,798 INFO L124 PetriNetUnfolderBase]: 1548/2464 cut-off events. [2024-06-21 17:11:39,798 INFO L125 PetriNetUnfolderBase]: For 59391/59397 co-relation queries the response was YES. [2024-06-21 17:11:39,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14112 conditions, 2464 events. 1548/2464 cut-off events. For 59391/59397 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12473 event pairs, 408 based on Foata normal form. 5/2468 useless extension candidates. Maximal degree in co-relation 14062. Up to 2147 conditions per place. [2024-06-21 17:11:39,815 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 120 selfloop transitions, 38 changer transitions 0/163 dead transitions. [2024-06-21 17:11:39,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 163 transitions, 1514 flow [2024-06-21 17:11:39,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:11:39,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:11:39,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:11:39,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 17:11:39,819 INFO L175 Difference]: Start difference. First operand has 114 places, 131 transitions, 1068 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:11:39,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 163 transitions, 1514 flow [2024-06-21 17:11:39,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 163 transitions, 1403 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 17:11:39,859 INFO L231 Difference]: Finished difference. Result has 116 places, 133 transitions, 1090 flow [2024-06-21 17:11:39,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1090, PETRI_PLACES=116, PETRI_TRANSITIONS=133} [2024-06-21 17:11:39,860 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-21 17:11:39,860 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 133 transitions, 1090 flow [2024-06-21 17:11:39,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:39,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:39,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:39,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:11:39,861 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:39,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:39,861 INFO L85 PathProgramCache]: Analyzing trace with hash 989428398, now seen corresponding path program 1 times [2024-06-21 17:11:39,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:39,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679263140] [2024-06-21 17:11:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:39,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:42,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:42,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679263140] [2024-06-21 17:11:42,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679263140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:42,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:42,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:42,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706342908] [2024-06-21 17:11:42,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:42,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:42,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:42,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:42,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:43,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:43,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 133 transitions, 1090 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:43,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:43,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:43,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:44,217 INFO L124 PetriNetUnfolderBase]: 1740/2807 cut-off events. [2024-06-21 17:11:44,217 INFO L125 PetriNetUnfolderBase]: For 79981/79989 co-relation queries the response was YES. [2024-06-21 17:11:44,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16416 conditions, 2807 events. 1740/2807 cut-off events. For 79981/79989 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 14998 event pairs, 341 based on Foata normal form. 24/2831 useless extension candidates. Maximal degree in co-relation 16365. Up to 2096 conditions per place. [2024-06-21 17:11:44,234 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 157 selfloop transitions, 33 changer transitions 0/195 dead transitions. [2024-06-21 17:11:44,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 195 transitions, 1836 flow [2024-06-21 17:11:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:11:44,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:11:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 17:11:44,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-21 17:11:44,236 INFO L175 Difference]: Start difference. First operand has 116 places, 133 transitions, 1090 flow. Second operand 10 states and 188 transitions. [2024-06-21 17:11:44,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 195 transitions, 1836 flow [2024-06-21 17:11:44,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 195 transitions, 1721 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 17:11:44,286 INFO L231 Difference]: Finished difference. Result has 120 places, 135 transitions, 1113 flow [2024-06-21 17:11:44,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=975, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1113, PETRI_PLACES=120, PETRI_TRANSITIONS=135} [2024-06-21 17:11:44,287 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-21 17:11:44,287 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 135 transitions, 1113 flow [2024-06-21 17:11:44,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:44,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:44,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:44,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:11:44,288 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:44,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:44,288 INFO L85 PathProgramCache]: Analyzing trace with hash -566533586, now seen corresponding path program 2 times [2024-06-21 17:11:44,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:44,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193631642] [2024-06-21 17:11:44,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:44,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:47,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:47,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193631642] [2024-06-21 17:11:47,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193631642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:47,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:47,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:47,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575537139] [2024-06-21 17:11:47,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:47,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:47,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:47,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:47,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:47,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:47,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 135 transitions, 1113 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:47,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:47,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:47,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:48,695 INFO L124 PetriNetUnfolderBase]: 1808/2931 cut-off events. [2024-06-21 17:11:48,695 INFO L125 PetriNetUnfolderBase]: For 85705/85713 co-relation queries the response was YES. [2024-06-21 17:11:48,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17125 conditions, 2931 events. 1808/2931 cut-off events. For 85705/85713 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15836 event pairs, 439 based on Foata normal form. 24/2955 useless extension candidates. Maximal degree in co-relation 17073. Up to 2306 conditions per place. [2024-06-21 17:11:48,713 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 155 selfloop transitions, 30 changer transitions 0/190 dead transitions. [2024-06-21 17:11:48,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 190 transitions, 1807 flow [2024-06-21 17:11:48,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:48,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:48,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 17:11:48,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 17:11:48,715 INFO L175 Difference]: Start difference. First operand has 120 places, 135 transitions, 1113 flow. Second operand 9 states and 171 transitions. [2024-06-21 17:11:48,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 190 transitions, 1807 flow [2024-06-21 17:11:48,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 190 transitions, 1745 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 17:11:48,764 INFO L231 Difference]: Finished difference. Result has 123 places, 136 transitions, 1151 flow [2024-06-21 17:11:48,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1151, PETRI_PLACES=123, PETRI_TRANSITIONS=136} [2024-06-21 17:11:48,768 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-21 17:11:48,768 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 136 transitions, 1151 flow [2024-06-21 17:11:48,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:48,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:48,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:48,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:11:48,769 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:48,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:48,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1855843402, now seen corresponding path program 3 times [2024-06-21 17:11:48,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:48,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631769872] [2024-06-21 17:11:48,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:48,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:51,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:51,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631769872] [2024-06-21 17:11:51,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631769872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:51,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:51,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:51,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001276769] [2024-06-21 17:11:51,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:51,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:51,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:51,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:51,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:51,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:51,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 136 transitions, 1151 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:51,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:51,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:51,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:52,612 INFO L124 PetriNetUnfolderBase]: 1772/2875 cut-off events. [2024-06-21 17:11:52,612 INFO L125 PetriNetUnfolderBase]: For 84093/84101 co-relation queries the response was YES. [2024-06-21 17:11:52,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16359 conditions, 2875 events. 1772/2875 cut-off events. For 84093/84101 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15491 event pairs, 445 based on Foata normal form. 28/2903 useless extension candidates. Maximal degree in co-relation 16305. Up to 2436 conditions per place. [2024-06-21 17:11:52,632 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 150 selfloop transitions, 29 changer transitions 0/184 dead transitions. [2024-06-21 17:11:52,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 184 transitions, 1669 flow [2024-06-21 17:11:52,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:52,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:52,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 17:11:52,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 17:11:52,634 INFO L175 Difference]: Start difference. First operand has 123 places, 136 transitions, 1151 flow. Second operand 9 states and 165 transitions. [2024-06-21 17:11:52,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 184 transitions, 1669 flow [2024-06-21 17:11:52,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 184 transitions, 1574 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 17:11:52,703 INFO L231 Difference]: Finished difference. Result has 125 places, 136 transitions, 1121 flow [2024-06-21 17:11:52,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1121, PETRI_PLACES=125, PETRI_TRANSITIONS=136} [2024-06-21 17:11:52,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-21 17:11:52,705 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 136 transitions, 1121 flow [2024-06-21 17:11:52,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:52,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:52,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:52,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:11:52,706 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)] === [2024-06-21 17:11:52,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:52,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1584932668, now seen corresponding path program 4 times [2024-06-21 17:11:52,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:52,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826525468] [2024-06-21 17:11:52,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:52,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:55,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:55,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826525468] [2024-06-21 17:11:55,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826525468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:55,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:55,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:55,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708127077] [2024-06-21 17:11:55,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:55,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:55,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:55,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:55,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:55,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:55,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 136 transitions, 1121 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:55,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:55,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:55,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:57,417 INFO L124 PetriNetUnfolderBase]: 1860/3019 cut-off events. [2024-06-21 17:11:57,417 INFO L125 PetriNetUnfolderBase]: For 88219/88221 co-relation queries the response was YES. [2024-06-21 17:11:57,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16990 conditions, 3019 events. 1860/3019 cut-off events. For 88219/88221 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16532 event pairs, 435 based on Foata normal form. 20/3038 useless extension candidates. Maximal degree in co-relation 16935. Up to 2301 conditions per place. [2024-06-21 17:11:57,438 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 114 selfloop transitions, 63 changer transitions 0/182 dead transitions. [2024-06-21 17:11:57,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 182 transitions, 1657 flow [2024-06-21 17:11:57,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:57,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:57,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 17:11:57,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 17:11:57,440 INFO L175 Difference]: Start difference. First operand has 125 places, 136 transitions, 1121 flow. Second operand 9 states and 171 transitions. [2024-06-21 17:11:57,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 182 transitions, 1657 flow [2024-06-21 17:11:57,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 182 transitions, 1593 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 17:11:57,499 INFO L231 Difference]: Finished difference. Result has 126 places, 137 transitions, 1226 flow [2024-06-21 17:11:57,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1226, PETRI_PLACES=126, PETRI_TRANSITIONS=137} [2024-06-21 17:11:57,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-21 17:11:57,500 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 137 transitions, 1226 flow [2024-06-21 17:11:57,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:57,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:57,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:57,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:11:57,501 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:57,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:57,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1579570288, now seen corresponding path program 5 times [2024-06-21 17:11:57,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:57,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181926362] [2024-06-21 17:11:57,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:57,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:00,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:00,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181926362] [2024-06-21 17:12:00,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181926362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:00,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:00,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:12:00,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515496192] [2024-06-21 17:12:00,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:00,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:12:00,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:00,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:12:00,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:12:00,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:00,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 137 transitions, 1226 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:00,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:00,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:00,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:01,781 INFO L124 PetriNetUnfolderBase]: 1948/3179 cut-off events. [2024-06-21 17:12:01,781 INFO L125 PetriNetUnfolderBase]: For 97014/97016 co-relation queries the response was YES. [2024-06-21 17:12:01,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18165 conditions, 3179 events. 1948/3179 cut-off events. For 97014/97016 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 17800 event pairs, 463 based on Foata normal form. 20/3198 useless extension candidates. Maximal degree in co-relation 18109. Up to 2449 conditions per place. [2024-06-21 17:12:01,802 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 118 selfloop transitions, 61 changer transitions 0/184 dead transitions. [2024-06-21 17:12:01,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 184 transitions, 1772 flow [2024-06-21 17:12:01,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:12:01,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:12:01,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 17:12:01,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 17:12:01,803 INFO L175 Difference]: Start difference. First operand has 126 places, 137 transitions, 1226 flow. Second operand 9 states and 173 transitions. [2024-06-21 17:12:01,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 184 transitions, 1772 flow [2024-06-21 17:12:01,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 184 transitions, 1631 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 17:12:01,873 INFO L231 Difference]: Finished difference. Result has 128 places, 138 transitions, 1252 flow [2024-06-21 17:12:01,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1252, PETRI_PLACES=128, PETRI_TRANSITIONS=138} [2024-06-21 17:12:01,874 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-21 17:12:01,874 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 138 transitions, 1252 flow [2024-06-21 17:12:01,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:01,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:01,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:01,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:12:01,874 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:01,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:01,875 INFO L85 PathProgramCache]: Analyzing trace with hash -944538702, now seen corresponding path program 6 times [2024-06-21 17:12:01,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:01,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651392019] [2024-06-21 17:12:01,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:01,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:04,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:04,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651392019] [2024-06-21 17:12:04,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651392019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:04,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:04,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:12:04,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582649646] [2024-06-21 17:12:04,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:04,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:12:04,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:04,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:12:04,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:12:04,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:04,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 138 transitions, 1252 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:04,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:04,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:04,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:06,460 INFO L124 PetriNetUnfolderBase]: 2016/3295 cut-off events. [2024-06-21 17:12:06,460 INFO L125 PetriNetUnfolderBase]: For 101421/101423 co-relation queries the response was YES. [2024-06-21 17:12:06,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18802 conditions, 3295 events. 2016/3295 cut-off events. For 101421/101423 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18579 event pairs, 447 based on Foata normal form. 16/3310 useless extension candidates. Maximal degree in co-relation 18745. Up to 2285 conditions per place. [2024-06-21 17:12:06,482 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 119 selfloop transitions, 64 changer transitions 0/188 dead transitions. [2024-06-21 17:12:06,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 188 transitions, 1822 flow [2024-06-21 17:12:06,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:12:06,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:12:06,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 17:12:06,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-21 17:12:06,485 INFO L175 Difference]: Start difference. First operand has 128 places, 138 transitions, 1252 flow. Second operand 9 states and 175 transitions. [2024-06-21 17:12:06,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 188 transitions, 1822 flow [2024-06-21 17:12:06,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 188 transitions, 1683 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 17:12:06,561 INFO L231 Difference]: Finished difference. Result has 130 places, 139 transitions, 1287 flow [2024-06-21 17:12:06,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1113, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1287, PETRI_PLACES=130, PETRI_TRANSITIONS=139} [2024-06-21 17:12:06,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-21 17:12:06,562 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 139 transitions, 1287 flow [2024-06-21 17:12:06,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:06,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:06,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:06,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:12:06,563 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:06,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:06,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1585148149, now seen corresponding path program 1 times [2024-06-21 17:12:06,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:06,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443812329] [2024-06-21 17:12:06,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:06,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:10,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:10,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:10,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443812329] [2024-06-21 17:12:10,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443812329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:10,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:10,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:12:10,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633224207] [2024-06-21 17:12:10,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:10,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:12:10,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:10,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:12:10,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:12:10,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:10,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 139 transitions, 1287 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:10,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:10,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:10,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:12,190 INFO L124 PetriNetUnfolderBase]: 2036/3348 cut-off events. [2024-06-21 17:12:12,191 INFO L125 PetriNetUnfolderBase]: For 100790/100798 co-relation queries the response was YES. [2024-06-21 17:12:12,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19072 conditions, 3348 events. 2036/3348 cut-off events. For 100790/100798 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 19254 event pairs, 489 based on Foata normal form. 12/3359 useless extension candidates. Maximal degree in co-relation 19014. Up to 2968 conditions per place. [2024-06-21 17:12:12,211 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 144 selfloop transitions, 36 changer transitions 0/185 dead transitions. [2024-06-21 17:12:12,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 185 transitions, 1838 flow [2024-06-21 17:12:12,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:12:12,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:12:12,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:12:12,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 17:12:12,213 INFO L175 Difference]: Start difference. First operand has 130 places, 139 transitions, 1287 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:12:12,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 185 transitions, 1838 flow [2024-06-21 17:12:12,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 185 transitions, 1680 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 17:12:12,285 INFO L231 Difference]: Finished difference. Result has 133 places, 144 transitions, 1287 flow [2024-06-21 17:12:12,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1287, PETRI_PLACES=133, PETRI_TRANSITIONS=144} [2024-06-21 17:12:12,286 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-21 17:12:12,286 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 144 transitions, 1287 flow [2024-06-21 17:12:12,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:12,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:12,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:12,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:12:12,287 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)] === [2024-06-21 17:12:12,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:12,287 INFO L85 PathProgramCache]: Analyzing trace with hash 746990009, now seen corresponding path program 1 times [2024-06-21 17:12:12,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:12,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430112728] [2024-06-21 17:12:12,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:12,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:14,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:14,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430112728] [2024-06-21 17:12:14,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430112728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:14,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:14,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:12:14,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256662132] [2024-06-21 17:12:14,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:14,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:12:14,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:14,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:12:14,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:12:14,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 17:12:14,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 144 transitions, 1287 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:14,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:14,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 17:12:14,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:15,264 INFO L124 PetriNetUnfolderBase]: 1735/2963 cut-off events. [2024-06-21 17:12:15,264 INFO L125 PetriNetUnfolderBase]: For 99380/99393 co-relation queries the response was YES. [2024-06-21 17:12:15,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17051 conditions, 2963 events. 1735/2963 cut-off events. For 99380/99393 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17674 event pairs, 462 based on Foata normal form. 19/2923 useless extension candidates. Maximal degree in co-relation 16991. Up to 2545 conditions per place. [2024-06-21 17:12:15,288 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 107 selfloop transitions, 27 changer transitions 0/163 dead transitions. [2024-06-21 17:12:15,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 163 transitions, 1607 flow [2024-06-21 17:12:15,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:12:15,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:12:15,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-21 17:12:15,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-21 17:12:15,289 INFO L175 Difference]: Start difference. First operand has 133 places, 144 transitions, 1287 flow. Second operand 6 states and 115 transitions. [2024-06-21 17:12:15,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 163 transitions, 1607 flow [2024-06-21 17:12:15,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 163 transitions, 1478 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 17:12:15,369 INFO L231 Difference]: Finished difference. Result has 133 places, 144 transitions, 1228 flow [2024-06-21 17:12:15,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1158, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1228, PETRI_PLACES=133, PETRI_TRANSITIONS=144} [2024-06-21 17:12:15,369 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-21 17:12:15,369 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 144 transitions, 1228 flow [2024-06-21 17:12:15,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:15,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:15,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:15,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:12:15,370 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:15,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:15,370 INFO L85 PathProgramCache]: Analyzing trace with hash 86431772, now seen corresponding path program 7 times [2024-06-21 17:12:15,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:15,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115023372] [2024-06-21 17:12:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:15,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:18,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:18,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115023372] [2024-06-21 17:12:18,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115023372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:18,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:18,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:12:18,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402659969] [2024-06-21 17:12:18,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:18,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:12:18,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:18,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:12:18,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:12:18,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:18,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 144 transitions, 1228 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:18,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:18,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:18,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:20,014 INFO L124 PetriNetUnfolderBase]: 2092/3426 cut-off events. [2024-06-21 17:12:20,014 INFO L125 PetriNetUnfolderBase]: For 115478/115484 co-relation queries the response was YES. [2024-06-21 17:12:20,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19505 conditions, 3426 events. 2092/3426 cut-off events. For 115478/115484 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 19615 event pairs, 462 based on Foata normal form. 21/3446 useless extension candidates. Maximal degree in co-relation 19444. Up to 2701 conditions per place. [2024-06-21 17:12:20,037 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 116 selfloop transitions, 66 changer transitions 0/187 dead transitions. [2024-06-21 17:12:20,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 187 transitions, 1782 flow [2024-06-21 17:12:20,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:12:20,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:12:20,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 17:12:20,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 17:12:20,043 INFO L175 Difference]: Start difference. First operand has 133 places, 144 transitions, 1228 flow. Second operand 9 states and 165 transitions. [2024-06-21 17:12:20,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 187 transitions, 1782 flow [2024-06-21 17:12:20,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 187 transitions, 1721 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 17:12:20,126 INFO L231 Difference]: Finished difference. Result has 136 places, 145 transitions, 1350 flow [2024-06-21 17:12:20,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1350, PETRI_PLACES=136, PETRI_TRANSITIONS=145} [2024-06-21 17:12:20,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-21 17:12:20,127 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 145 transitions, 1350 flow [2024-06-21 17:12:20,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:20,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:20,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:20,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:12:20,128 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:20,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:20,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1606068334, now seen corresponding path program 8 times [2024-06-21 17:12:20,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:20,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668247880] [2024-06-21 17:12:20,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:20,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:23,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:23,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668247880] [2024-06-21 17:12:23,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668247880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:23,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:23,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:12:23,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145061921] [2024-06-21 17:12:23,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:23,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:12:23,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:23,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:12:23,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:12:23,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:23,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 145 transitions, 1350 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:23,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:23,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:23,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:24,683 INFO L124 PetriNetUnfolderBase]: 2180/3586 cut-off events. [2024-06-21 17:12:24,684 INFO L125 PetriNetUnfolderBase]: For 121820/121826 co-relation queries the response was YES. [2024-06-21 17:12:24,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20709 conditions, 3586 events. 2180/3586 cut-off events. For 121820/121826 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 20881 event pairs, 484 based on Foata normal form. 21/3606 useless extension candidates. Maximal degree in co-relation 20648. Up to 2849 conditions per place. [2024-06-21 17:12:24,707 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 121 selfloop transitions, 63 changer transitions 0/189 dead transitions. [2024-06-21 17:12:24,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 189 transitions, 1916 flow [2024-06-21 17:12:24,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:12:24,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:12:24,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 17:12:24,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 17:12:24,709 INFO L175 Difference]: Start difference. First operand has 136 places, 145 transitions, 1350 flow. Second operand 9 states and 167 transitions. [2024-06-21 17:12:24,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 189 transitions, 1916 flow [2024-06-21 17:12:24,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 189 transitions, 1761 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 17:12:24,799 INFO L231 Difference]: Finished difference. Result has 138 places, 146 transitions, 1374 flow [2024-06-21 17:12:24,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1374, PETRI_PLACES=138, PETRI_TRANSITIONS=146} [2024-06-21 17:12:24,799 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-21 17:12:24,799 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 146 transitions, 1374 flow [2024-06-21 17:12:24,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:24,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:24,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:24,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:12:24,800 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:24,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:24,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1605920464, now seen corresponding path program 9 times [2024-06-21 17:12:24,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:24,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278868534] [2024-06-21 17:12:24,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:24,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:27,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:27,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278868534] [2024-06-21 17:12:27,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278868534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:27,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:27,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:12:27,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564336318] [2024-06-21 17:12:27,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:27,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:12:27,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:27,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:12:27,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:12:27,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:27,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 146 transitions, 1374 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:27,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:27,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:27,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:29,058 INFO L124 PetriNetUnfolderBase]: 2316/3818 cut-off events. [2024-06-21 17:12:29,058 INFO L125 PetriNetUnfolderBase]: For 136399/136405 co-relation queries the response was YES. [2024-06-21 17:12:29,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22496 conditions, 3818 events. 2316/3818 cut-off events. For 136399/136405 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 22529 event pairs, 494 based on Foata normal form. 17/3834 useless extension candidates. Maximal degree in co-relation 22434. Up to 2609 conditions per place. [2024-06-21 17:12:29,083 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 124 selfloop transitions, 67 changer transitions 0/196 dead transitions. [2024-06-21 17:12:29,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 196 transitions, 2160 flow [2024-06-21 17:12:29,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:12:29,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:12:29,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 17:12:29,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 17:12:29,092 INFO L175 Difference]: Start difference. First operand has 138 places, 146 transitions, 1374 flow. Second operand 9 states and 171 transitions. [2024-06-21 17:12:29,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 196 transitions, 2160 flow [2024-06-21 17:12:29,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 196 transitions, 2009 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 17:12:29,199 INFO L231 Difference]: Finished difference. Result has 140 places, 148 transitions, 1457 flow [2024-06-21 17:12:29,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1457, PETRI_PLACES=140, PETRI_TRANSITIONS=148} [2024-06-21 17:12:29,200 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-21 17:12:29,200 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 148 transitions, 1457 flow [2024-06-21 17:12:29,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:29,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:29,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:29,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:12:29,201 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:29,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:29,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1611430714, now seen corresponding path program 10 times [2024-06-21 17:12:29,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:29,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371070198] [2024-06-21 17:12:29,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:29,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:31,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:31,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371070198] [2024-06-21 17:12:31,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371070198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:31,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:31,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:12:31,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366611175] [2024-06-21 17:12:31,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:31,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:12:31,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:31,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:12:31,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:12:31,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:31,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 148 transitions, 1457 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:31,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:31,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:31,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:33,477 INFO L124 PetriNetUnfolderBase]: 2280/3762 cut-off events. [2024-06-21 17:12:33,477 INFO L125 PetriNetUnfolderBase]: For 129243/129249 co-relation queries the response was YES. [2024-06-21 17:12:33,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21395 conditions, 3762 events. 2280/3762 cut-off events. For 129243/129249 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 22214 event pairs, 506 based on Foata normal form. 21/3782 useless extension candidates. Maximal degree in co-relation 21332. Up to 3025 conditions per place. [2024-06-21 17:12:33,500 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 124 selfloop transitions, 62 changer transitions 0/191 dead transitions. [2024-06-21 17:12:33,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 191 transitions, 1983 flow [2024-06-21 17:12:33,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:12:33,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:12:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 17:12:33,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 17:12:33,502 INFO L175 Difference]: Start difference. First operand has 140 places, 148 transitions, 1457 flow. Second operand 9 states and 168 transitions. [2024-06-21 17:12:33,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 191 transitions, 1983 flow [2024-06-21 17:12:33,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 191 transitions, 1849 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 17:12:33,633 INFO L231 Difference]: Finished difference. Result has 144 places, 148 transitions, 1454 flow [2024-06-21 17:12:33,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1323, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1454, PETRI_PLACES=144, PETRI_TRANSITIONS=148} [2024-06-21 17:12:33,634 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-21 17:12:33,634 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 148 transitions, 1454 flow [2024-06-21 17:12:33,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:33,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:33,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:33,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:12:33,635 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:33,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:33,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1611646195, now seen corresponding path program 2 times [2024-06-21 17:12:33,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:33,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433272723] [2024-06-21 17:12:33,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:33,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:37,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:37,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433272723] [2024-06-21 17:12:37,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433272723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:37,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:37,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:12:37,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296968595] [2024-06-21 17:12:37,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:37,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:12:37,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:37,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:12:37,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:12:37,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:37,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 148 transitions, 1454 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:37,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:37,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:37,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:38,767 INFO L124 PetriNetUnfolderBase]: 2300/3813 cut-off events. [2024-06-21 17:12:38,767 INFO L125 PetriNetUnfolderBase]: For 117771/117783 co-relation queries the response was YES. [2024-06-21 17:12:38,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21514 conditions, 3813 events. 2300/3813 cut-off events. For 117771/117783 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 22776 event pairs, 549 based on Foata normal form. 16/3829 useless extension candidates. Maximal degree in co-relation 21449. Up to 3428 conditions per place. [2024-06-21 17:12:38,796 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 148 selfloop transitions, 38 changer transitions 0/191 dead transitions. [2024-06-21 17:12:38,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 191 transitions, 2024 flow [2024-06-21 17:12:38,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:12:38,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:12:38,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 17:12:38,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 17:12:38,798 INFO L175 Difference]: Start difference. First operand has 144 places, 148 transitions, 1454 flow. Second operand 9 states and 159 transitions. [2024-06-21 17:12:38,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 191 transitions, 2024 flow [2024-06-21 17:12:38,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 191 transitions, 1881 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 17:12:38,920 INFO L231 Difference]: Finished difference. Result has 146 places, 153 transitions, 1486 flow [2024-06-21 17:12:38,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1486, PETRI_PLACES=146, PETRI_TRANSITIONS=153} [2024-06-21 17:12:38,921 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-21 17:12:38,921 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 153 transitions, 1486 flow [2024-06-21 17:12:38,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:38,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:38,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:38,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:12:38,922 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:38,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:38,922 INFO L85 PathProgramCache]: Analyzing trace with hash 86647253, now seen corresponding path program 3 times [2024-06-21 17:12:38,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:38,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340975448] [2024-06-21 17:12:38,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:38,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:38,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:42,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:42,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340975448] [2024-06-21 17:12:42,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340975448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:42,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:42,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:12:42,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886929162] [2024-06-21 17:12:42,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:42,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:12:42,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:42,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:12:42,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:12:42,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:42,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 153 transitions, 1486 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:42,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:42,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:42,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:43,876 INFO L124 PetriNetUnfolderBase]: 2333/3888 cut-off events. [2024-06-21 17:12:43,877 INFO L125 PetriNetUnfolderBase]: For 124315/124327 co-relation queries the response was YES. [2024-06-21 17:12:43,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22107 conditions, 3888 events. 2333/3888 cut-off events. For 124315/124327 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 23401 event pairs, 561 based on Foata normal form. 16/3904 useless extension candidates. Maximal degree in co-relation 22040. Up to 3474 conditions per place. [2024-06-21 17:12:43,905 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 149 selfloop transitions, 42 changer transitions 0/196 dead transitions. [2024-06-21 17:12:43,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 196 transitions, 2075 flow [2024-06-21 17:12:43,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:12:43,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:12:43,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 17:12:43,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-21 17:12:43,906 INFO L175 Difference]: Start difference. First operand has 146 places, 153 transitions, 1486 flow. Second operand 9 states and 158 transitions. [2024-06-21 17:12:43,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 196 transitions, 2075 flow [2024-06-21 17:12:44,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 196 transitions, 1940 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 17:12:44,032 INFO L231 Difference]: Finished difference. Result has 150 places, 159 transitions, 1551 flow [2024-06-21 17:12:44,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1551, PETRI_PLACES=150, PETRI_TRANSITIONS=159} [2024-06-21 17:12:44,033 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-21 17:12:44,033 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 159 transitions, 1551 flow [2024-06-21 17:12:44,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:44,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:44,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:44,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:12:44,034 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:44,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:44,034 INFO L85 PathProgramCache]: Analyzing trace with hash -379081385, now seen corresponding path program 4 times [2024-06-21 17:12:44,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:44,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017677401] [2024-06-21 17:12:44,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:44,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:47,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:47,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017677401] [2024-06-21 17:12:47,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017677401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:47,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:47,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:12:47,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297517191] [2024-06-21 17:12:47,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:47,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:12:47,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:47,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:12:47,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:12:47,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:47,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 159 transitions, 1551 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:47,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:47,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:47,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:49,220 INFO L124 PetriNetUnfolderBase]: 2353/3920 cut-off events. [2024-06-21 17:12:49,221 INFO L125 PetriNetUnfolderBase]: For 131599/131611 co-relation queries the response was YES. [2024-06-21 17:12:49,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22727 conditions, 3920 events. 2353/3920 cut-off events. For 131599/131611 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23692 event pairs, 579 based on Foata normal form. 16/3936 useless extension candidates. Maximal degree in co-relation 22658. Up to 3506 conditions per place. [2024-06-21 17:12:49,249 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 149 selfloop transitions, 46 changer transitions 0/200 dead transitions. [2024-06-21 17:12:49,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 200 transitions, 2137 flow [2024-06-21 17:12:49,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:12:49,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:12:49,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:12:49,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 17:12:49,250 INFO L175 Difference]: Start difference. First operand has 150 places, 159 transitions, 1551 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:12:49,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 200 transitions, 2137 flow [2024-06-21 17:12:49,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 200 transitions, 1990 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 17:12:49,361 INFO L231 Difference]: Finished difference. Result has 153 places, 163 transitions, 1593 flow [2024-06-21 17:12:49,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1408, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1593, PETRI_PLACES=153, PETRI_TRANSITIONS=163} [2024-06-21 17:12:49,362 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-21 17:12:49,362 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 163 transitions, 1593 flow [2024-06-21 17:12:49,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:49,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:49,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:49,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:12:49,363 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:49,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:49,363 INFO L85 PathProgramCache]: Analyzing trace with hash 352670963, now seen corresponding path program 5 times [2024-06-21 17:12:49,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:49,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018499117] [2024-06-21 17:12:49,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:49,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:52,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:52,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018499117] [2024-06-21 17:12:52,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018499117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:52,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:52,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:12:52,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588734724] [2024-06-21 17:12:52,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:52,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:12:52,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:52,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:12:52,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:12:52,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:52,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 163 transitions, 1593 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:52,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:52,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:52,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:54,033 INFO L124 PetriNetUnfolderBase]: 2345/3896 cut-off events. [2024-06-21 17:12:54,034 INFO L125 PetriNetUnfolderBase]: For 133157/133169 co-relation queries the response was YES. [2024-06-21 17:12:54,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22568 conditions, 3896 events. 2345/3896 cut-off events. For 133157/133169 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 23416 event pairs, 511 based on Foata normal form. 16/3912 useless extension candidates. Maximal degree in co-relation 22498. Up to 3378 conditions per place. [2024-06-21 17:12:54,064 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 143 selfloop transitions, 55 changer transitions 0/203 dead transitions. [2024-06-21 17:12:54,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 203 transitions, 2171 flow [2024-06-21 17:12:54,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:12:54,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:12:54,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 17:12:54,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-21 17:12:54,066 INFO L175 Difference]: Start difference. First operand has 153 places, 163 transitions, 1593 flow. Second operand 9 states and 158 transitions. [2024-06-21 17:12:54,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 203 transitions, 2171 flow [2024-06-21 17:12:54,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 203 transitions, 2038 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 17:12:54,198 INFO L231 Difference]: Finished difference. Result has 157 places, 165 transitions, 1651 flow [2024-06-21 17:12:54,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1651, PETRI_PLACES=157, PETRI_TRANSITIONS=165} [2024-06-21 17:12:54,198 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-21 17:12:54,199 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 165 transitions, 1651 flow [2024-06-21 17:12:54,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:54,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:54,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:54,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:12:54,199 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:54,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:54,200 INFO L85 PathProgramCache]: Analyzing trace with hash 759370169, now seen corresponding path program 2 times [2024-06-21 17:12:54,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:54,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105775335] [2024-06-21 17:12:54,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:54,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:56,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:56,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105775335] [2024-06-21 17:12:56,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105775335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:56,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:56,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:12:56,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065955544] [2024-06-21 17:12:56,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:56,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:12:56,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:56,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:12:56,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:12:56,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:12:56,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 165 transitions, 1651 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:56,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:56,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:12:56,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:57,420 INFO L124 PetriNetUnfolderBase]: 2197/3701 cut-off events. [2024-06-21 17:12:57,421 INFO L125 PetriNetUnfolderBase]: For 133729/133735 co-relation queries the response was YES. [2024-06-21 17:12:57,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21652 conditions, 3701 events. 2197/3701 cut-off events. For 133729/133735 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 22618 event pairs, 544 based on Foata normal form. 5/3663 useless extension candidates. Maximal degree in co-relation 21581. Up to 3289 conditions per place. [2024-06-21 17:12:57,450 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 133 selfloop transitions, 32 changer transitions 0/183 dead transitions. [2024-06-21 17:12:57,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 183 transitions, 2083 flow [2024-06-21 17:12:57,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:12:57,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:12:57,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 17:12:57,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:12:57,451 INFO L175 Difference]: Start difference. First operand has 157 places, 165 transitions, 1651 flow. Second operand 6 states and 108 transitions. [2024-06-21 17:12:57,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 183 transitions, 2083 flow [2024-06-21 17:12:57,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 183 transitions, 1910 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 17:12:57,594 INFO L231 Difference]: Finished difference. Result has 156 places, 168 transitions, 1586 flow [2024-06-21 17:12:57,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1478, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1586, PETRI_PLACES=156, PETRI_TRANSITIONS=168} [2024-06-21 17:12:57,595 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-21 17:12:57,595 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 168 transitions, 1586 flow [2024-06-21 17:12:57,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:57,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:57,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:57,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:12:57,596 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:57,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:57,596 INFO L85 PathProgramCache]: Analyzing trace with hash 752709881, now seen corresponding path program 1 times [2024-06-21 17:12:57,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:57,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581739277] [2024-06-21 17:12:57,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:57,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:59,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:59,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581739277] [2024-06-21 17:12:59,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581739277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:59,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:59,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:12:59,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943977917] [2024-06-21 17:12:59,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:59,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:12:59,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:59,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:12:59,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:12:59,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:59,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 168 transitions, 1586 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) [2024-06-21 17:12:59,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:59,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:59,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:00,318 INFO L124 PetriNetUnfolderBase]: 2343/3890 cut-off events. [2024-06-21 17:13:00,318 INFO L125 PetriNetUnfolderBase]: For 136844/136846 co-relation queries the response was YES. [2024-06-21 17:13:00,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22663 conditions, 3890 events. 2343/3890 cut-off events. For 136844/136846 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 23340 event pairs, 566 based on Foata normal form. 2/3892 useless extension candidates. Maximal degree in co-relation 22591. Up to 3644 conditions per place. [2024-06-21 17:13:00,348 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 172 selfloop transitions, 16 changer transitions 0/193 dead transitions. [2024-06-21 17:13:00,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 193 transitions, 2174 flow [2024-06-21 17:13:00,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:13:00,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:13:00,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 17:13:00,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 17:13:00,350 INFO L175 Difference]: Start difference. First operand has 156 places, 168 transitions, 1586 flow. Second operand 6 states and 106 transitions. [2024-06-21 17:13:00,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 193 transitions, 2174 flow [2024-06-21 17:13:00,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 193 transitions, 2088 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 17:13:00,504 INFO L231 Difference]: Finished difference. Result has 158 places, 174 transitions, 1620 flow [2024-06-21 17:13:00,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1500, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1620, PETRI_PLACES=158, PETRI_TRANSITIONS=174} [2024-06-21 17:13:00,506 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-21 17:13:00,506 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 174 transitions, 1620 flow [2024-06-21 17:13:00,506 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) [2024-06-21 17:13:00,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:00,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:00,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:13:00,507 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:00,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:00,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1561051931, now seen corresponding path program 2 times [2024-06-21 17:13:00,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:00,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496001779] [2024-06-21 17:13:00,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:00,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:02,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:02,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496001779] [2024-06-21 17:13:02,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496001779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:02,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:02,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:13:02,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53603851] [2024-06-21 17:13:02,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:02,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:13:02,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:02,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:13:02,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:13:02,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:13:02,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 174 transitions, 1620 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) [2024-06-21 17:13:02,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:02,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:13:02,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:03,380 INFO L124 PetriNetUnfolderBase]: 2337/3883 cut-off events. [2024-06-21 17:13:03,381 INFO L125 PetriNetUnfolderBase]: For 140411/140415 co-relation queries the response was YES. [2024-06-21 17:13:03,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22704 conditions, 3883 events. 2337/3883 cut-off events. For 140411/140415 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 23292 event pairs, 569 based on Foata normal form. 4/3887 useless extension candidates. Maximal degree in co-relation 22631. Up to 3639 conditions per place. [2024-06-21 17:13:03,408 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 166 selfloop transitions, 16 changer transitions 0/187 dead transitions. [2024-06-21 17:13:03,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 187 transitions, 2018 flow [2024-06-21 17:13:03,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:13:03,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:13:03,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-21 17:13:03,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 17:13:03,410 INFO L175 Difference]: Start difference. First operand has 158 places, 174 transitions, 1620 flow. Second operand 6 states and 100 transitions. [2024-06-21 17:13:03,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 187 transitions, 2018 flow [2024-06-21 17:13:03,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 187 transitions, 1954 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-21 17:13:03,551 INFO L231 Difference]: Finished difference. Result has 162 places, 174 transitions, 1594 flow [2024-06-21 17:13:03,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1556, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1594, PETRI_PLACES=162, PETRI_TRANSITIONS=174} [2024-06-21 17:13:03,553 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-21 17:13:03,553 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 174 transitions, 1594 flow [2024-06-21 17:13:03,553 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) [2024-06-21 17:13:03,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:03,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:03,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:13:03,554 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:03,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:03,554 INFO L85 PathProgramCache]: Analyzing trace with hash 759385049, now seen corresponding path program 1 times [2024-06-21 17:13:03,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:03,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449358423] [2024-06-21 17:13:03,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:03,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:03,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:05,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:05,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449358423] [2024-06-21 17:13:05,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449358423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:05,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:05,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:13:05,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190890500] [2024-06-21 17:13:05,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:05,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:13:05,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:05,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:13:05,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:13:05,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 17:13:05,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 174 transitions, 1594 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:05,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:05,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 17:13:05,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:06,966 INFO L124 PetriNetUnfolderBase]: 2064/3550 cut-off events. [2024-06-21 17:13:06,967 INFO L125 PetriNetUnfolderBase]: For 142445/142458 co-relation queries the response was YES. [2024-06-21 17:13:06,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21012 conditions, 3550 events. 2064/3550 cut-off events. For 142445/142458 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22285 event pairs, 527 based on Foata normal form. 13/3509 useless extension candidates. Maximal degree in co-relation 20937. Up to 3121 conditions per place. [2024-06-21 17:13:06,995 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 141 selfloop transitions, 10 changer transitions 0/189 dead transitions. [2024-06-21 17:13:06,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 189 transitions, 1958 flow [2024-06-21 17:13:06,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:13:06,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:13:06,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 17:13:06,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-21 17:13:06,997 INFO L175 Difference]: Start difference. First operand has 162 places, 174 transitions, 1594 flow. Second operand 6 states and 107 transitions. [2024-06-21 17:13:06,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 189 transitions, 1958 flow [2024-06-21 17:13:07,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 189 transitions, 1914 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 17:13:07,120 INFO L231 Difference]: Finished difference. Result has 163 places, 176 transitions, 1607 flow [2024-06-21 17:13:07,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1550, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1607, PETRI_PLACES=163, PETRI_TRANSITIONS=176} [2024-06-21 17:13:07,120 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-21 17:13:07,120 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 176 transitions, 1607 flow [2024-06-21 17:13:07,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:07,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:07,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:07,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:13:07,121 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)] === [2024-06-21 17:13:07,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:07,121 INFO L85 PathProgramCache]: Analyzing trace with hash 961570498, now seen corresponding path program 1 times [2024-06-21 17:13:07,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:07,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696710668] [2024-06-21 17:13:07,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:07,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:10,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:10,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696710668] [2024-06-21 17:13:10,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696710668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:10,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:10,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:13:10,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120861912] [2024-06-21 17:13:10,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:10,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:13:10,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:10,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:13:10,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:13:10,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:13:10,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 176 transitions, 1607 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) [2024-06-21 17:13:10,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:10,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:13:10,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:12,119 INFO L124 PetriNetUnfolderBase]: 2524/4235 cut-off events. [2024-06-21 17:13:12,120 INFO L125 PetriNetUnfolderBase]: For 163597/163599 co-relation queries the response was YES. [2024-06-21 17:13:12,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24454 conditions, 4235 events. 2524/4235 cut-off events. For 163597/163599 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 26126 event pairs, 550 based on Foata normal form. 12/4246 useless extension candidates. Maximal degree in co-relation 24378. Up to 3140 conditions per place. [2024-06-21 17:13:12,152 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 152 selfloop transitions, 80 changer transitions 0/237 dead transitions. [2024-06-21 17:13:12,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 237 transitions, 2413 flow [2024-06-21 17:13:12,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:13:12,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:13:12,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-21 17:13:12,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-21 17:13:12,154 INFO L175 Difference]: Start difference. First operand has 163 places, 176 transitions, 1607 flow. Second operand 10 states and 187 transitions. [2024-06-21 17:13:12,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 237 transitions, 2413 flow [2024-06-21 17:13:12,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 237 transitions, 2372 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 17:13:12,401 INFO L231 Difference]: Finished difference. Result has 171 places, 187 transitions, 1931 flow [2024-06-21 17:13:12,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1931, PETRI_PLACES=171, PETRI_TRANSITIONS=187} [2024-06-21 17:13:12,401 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-21 17:13:12,401 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 187 transitions, 1931 flow [2024-06-21 17:13:12,401 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) [2024-06-21 17:13:12,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:12,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:12,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:13:12,402 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:12,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:12,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1648559488, now seen corresponding path program 2 times [2024-06-21 17:13:12,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:12,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346451773] [2024-06-21 17:13:12,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:12,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:16,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:16,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:16,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346451773] [2024-06-21 17:13:16,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346451773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:16,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:16,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:13:16,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329627098] [2024-06-21 17:13:16,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:16,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:13:16,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:16,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:13:16,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:13:16,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:13:16,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 187 transitions, 1931 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) [2024-06-21 17:13:16,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:16,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:13:16,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:18,803 INFO L124 PetriNetUnfolderBase]: 2668/4520 cut-off events. [2024-06-21 17:13:18,803 INFO L125 PetriNetUnfolderBase]: For 177567/177573 co-relation queries the response was YES. [2024-06-21 17:13:18,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26648 conditions, 4520 events. 2668/4520 cut-off events. For 177567/177573 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 28536 event pairs, 607 based on Foata normal form. 13/4532 useless extension candidates. Maximal degree in co-relation 26569. Up to 3504 conditions per place. [2024-06-21 17:13:18,843 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 156 selfloop transitions, 81 changer transitions 0/242 dead transitions. [2024-06-21 17:13:18,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 242 transitions, 2719 flow [2024-06-21 17:13:18,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:13:18,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:13:18,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 17:13:18,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-21 17:13:18,845 INFO L175 Difference]: Start difference. First operand has 171 places, 187 transitions, 1931 flow. Second operand 10 states and 184 transitions. [2024-06-21 17:13:18,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 242 transitions, 2719 flow [2024-06-21 17:13:19,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 242 transitions, 2535 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 17:13:19,020 INFO L231 Difference]: Finished difference. Result has 178 places, 195 transitions, 2085 flow [2024-06-21 17:13:19,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1759, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2085, PETRI_PLACES=178, PETRI_TRANSITIONS=195} [2024-06-21 17:13:19,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-21 17:13:19,021 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 195 transitions, 2085 flow [2024-06-21 17:13:19,021 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) [2024-06-21 17:13:19,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:19,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:19,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:13:19,022 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:19,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:19,022 INFO L85 PathProgramCache]: Analyzing trace with hash -171261184, now seen corresponding path program 3 times [2024-06-21 17:13:19,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:19,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474218190] [2024-06-21 17:13:19,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:19,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:22,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:22,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474218190] [2024-06-21 17:13:22,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474218190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:22,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:22,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:13:22,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463790105] [2024-06-21 17:13:22,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:22,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:13:22,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:22,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:13:22,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:13:22,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:13:22,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 195 transitions, 2085 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) [2024-06-21 17:13:22,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:22,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:13:22,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:24,736 INFO L124 PetriNetUnfolderBase]: 2797/4769 cut-off events. [2024-06-21 17:13:24,736 INFO L125 PetriNetUnfolderBase]: For 186705/186711 co-relation queries the response was YES. [2024-06-21 17:13:24,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27930 conditions, 4769 events. 2797/4769 cut-off events. For 186705/186711 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 30809 event pairs, 643 based on Foata normal form. 13/4781 useless extension candidates. Maximal degree in co-relation 27848. Up to 3830 conditions per place. [2024-06-21 17:13:24,783 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 155 selfloop transitions, 87 changer transitions 0/247 dead transitions. [2024-06-21 17:13:24,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 247 transitions, 2846 flow [2024-06-21 17:13:24,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:13:24,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:13:24,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-21 17:13:24,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-21 17:13:24,785 INFO L175 Difference]: Start difference. First operand has 178 places, 195 transitions, 2085 flow. Second operand 10 states and 183 transitions. [2024-06-21 17:13:24,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 247 transitions, 2846 flow [2024-06-21 17:13:25,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 247 transitions, 2652 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 17:13:25,019 INFO L231 Difference]: Finished difference. Result has 185 places, 201 transitions, 2210 flow [2024-06-21 17:13:25,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1899, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2210, PETRI_PLACES=185, PETRI_TRANSITIONS=201} [2024-06-21 17:13:25,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-21 17:13:25,020 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 201 transitions, 2210 flow [2024-06-21 17:13:25,020 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) [2024-06-21 17:13:25,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:25,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:25,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:13:25,021 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:25,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:25,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2047647588, now seen corresponding path program 4 times [2024-06-21 17:13:25,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:25,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973762739] [2024-06-21 17:13:25,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:25,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:25,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:29,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:29,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973762739] [2024-06-21 17:13:29,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973762739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:29,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:29,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:13:29,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409385651] [2024-06-21 17:13:29,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:29,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:13:29,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:29,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:13:29,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:13:29,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:13:29,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 201 transitions, 2210 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) [2024-06-21 17:13:29,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:29,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:13:29,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:31,109 INFO L124 PetriNetUnfolderBase]: 2893/4949 cut-off events. [2024-06-21 17:13:31,109 INFO L125 PetriNetUnfolderBase]: For 195480/195486 co-relation queries the response was YES. [2024-06-21 17:13:31,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28933 conditions, 4949 events. 2893/4949 cut-off events. For 195480/195486 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 32368 event pairs, 673 based on Foata normal form. 13/4961 useless extension candidates. Maximal degree in co-relation 28848. Up to 3998 conditions per place. [2024-06-21 17:13:31,154 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 153 selfloop transitions, 93 changer transitions 0/251 dead transitions. [2024-06-21 17:13:31,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 251 transitions, 2964 flow [2024-06-21 17:13:31,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:13:31,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:13:31,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-21 17:13:31,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 17:13:31,156 INFO L175 Difference]: Start difference. First operand has 185 places, 201 transitions, 2210 flow. Second operand 10 states and 182 transitions. [2024-06-21 17:13:31,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 251 transitions, 2964 flow [2024-06-21 17:13:31,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 251 transitions, 2757 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 17:13:31,434 INFO L231 Difference]: Finished difference. Result has 191 places, 205 transitions, 2307 flow [2024-06-21 17:13:31,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2005, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2307, PETRI_PLACES=191, PETRI_TRANSITIONS=205} [2024-06-21 17:13:31,434 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-21 17:13:31,434 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 205 transitions, 2307 flow [2024-06-21 17:13:31,435 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) [2024-06-21 17:13:31,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:31,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:31,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:13:31,435 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:31,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:31,436 INFO L85 PathProgramCache]: Analyzing trace with hash -474480160, now seen corresponding path program 5 times [2024-06-21 17:13:31,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:31,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513056024] [2024-06-21 17:13:31,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:31,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:35,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:35,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513056024] [2024-06-21 17:13:35,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513056024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:35,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:35,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:13:35,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921842264] [2024-06-21 17:13:35,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:35,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:13:35,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:35,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:13:35,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:13:35,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:13:35,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 205 transitions, 2307 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) [2024-06-21 17:13:35,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:35,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:13:35,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:37,007 INFO L124 PetriNetUnfolderBase]: 2873/4917 cut-off events. [2024-06-21 17:13:37,008 INFO L125 PetriNetUnfolderBase]: For 184469/184475 co-relation queries the response was YES. [2024-06-21 17:13:37,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27903 conditions, 4917 events. 2873/4917 cut-off events. For 184469/184475 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 31954 event pairs, 617 based on Foata normal form. 13/4929 useless extension candidates. Maximal degree in co-relation 27816. Up to 2842 conditions per place. [2024-06-21 17:13:37,051 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 138 selfloop transitions, 108 changer transitions 0/251 dead transitions. [2024-06-21 17:13:37,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 251 transitions, 2871 flow [2024-06-21 17:13:37,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:13:37,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:13:37,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 17:13:37,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 17:13:37,067 INFO L175 Difference]: Start difference. First operand has 191 places, 205 transitions, 2307 flow. Second operand 10 states and 181 transitions. [2024-06-21 17:13:37,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 251 transitions, 2871 flow [2024-06-21 17:13:37,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 251 transitions, 2677 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 17:13:37,332 INFO L231 Difference]: Finished difference. Result has 195 places, 204 transitions, 2243 flow [2024-06-21 17:13:37,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2023, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2243, PETRI_PLACES=195, PETRI_TRANSITIONS=204} [2024-06-21 17:13:37,332 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-21 17:13:37,332 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 204 transitions, 2243 flow [2024-06-21 17:13:37,333 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) [2024-06-21 17:13:37,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:37,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:37,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:13:37,333 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:37,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:37,334 INFO L85 PathProgramCache]: Analyzing trace with hash -787001284, now seen corresponding path program 1 times [2024-06-21 17:13:37,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:37,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631065414] [2024-06-21 17:13:37,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:37,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:39,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:39,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:39,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631065414] [2024-06-21 17:13:39,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631065414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:39,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:39,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:13:39,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481651080] [2024-06-21 17:13:39,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:39,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:13:39,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:39,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:13:39,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:13:39,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:13:39,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 204 transitions, 2243 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:39,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:39,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:13:39,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:40,740 INFO L124 PetriNetUnfolderBase]: 2883/4934 cut-off events. [2024-06-21 17:13:40,740 INFO L125 PetriNetUnfolderBase]: For 176287/176289 co-relation queries the response was YES. [2024-06-21 17:13:40,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28041 conditions, 4934 events. 2883/4934 cut-off events. For 176287/176289 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 32273 event pairs, 669 based on Foata normal form. 2/4936 useless extension candidates. Maximal degree in co-relation 27953. Up to 4557 conditions per place. [2024-06-21 17:13:40,784 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 206 selfloop transitions, 24 changer transitions 0/235 dead transitions. [2024-06-21 17:13:40,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 235 transitions, 2943 flow [2024-06-21 17:13:40,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:13:40,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:13:40,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 17:13:40,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 17:13:40,785 INFO L175 Difference]: Start difference. First operand has 195 places, 204 transitions, 2243 flow. Second operand 7 states and 123 transitions. [2024-06-21 17:13:40,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 235 transitions, 2943 flow [2024-06-21 17:13:41,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 235 transitions, 2593 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-21 17:13:41,067 INFO L231 Difference]: Finished difference. Result has 192 places, 210 transitions, 2025 flow [2024-06-21 17:13:41,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1893, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2025, PETRI_PLACES=192, PETRI_TRANSITIONS=210} [2024-06-21 17:13:41,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-21 17:13:41,068 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 210 transitions, 2025 flow [2024-06-21 17:13:41,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:41,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:41,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:41,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:13:41,069 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:41,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:41,069 INFO L85 PathProgramCache]: Analyzing trace with hash -786851554, now seen corresponding path program 2 times [2024-06-21 17:13:41,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:41,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839971927] [2024-06-21 17:13:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:41,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:42,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:42,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:42,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839971927] [2024-06-21 17:13:42,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839971927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:42,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:42,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:13:42,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189180510] [2024-06-21 17:13:42,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:42,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:13:42,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:42,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:13:42,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:13:42,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:13:42,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 210 transitions, 2025 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:42,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:42,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:13:42,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:44,643 INFO L124 PetriNetUnfolderBase]: 2893/4948 cut-off events. [2024-06-21 17:13:44,643 INFO L125 PetriNetUnfolderBase]: For 176013/176015 co-relation queries the response was YES. [2024-06-21 17:13:44,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27272 conditions, 4948 events. 2893/4948 cut-off events. For 176013/176015 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 32387 event pairs, 669 based on Foata normal form. 2/4950 useless extension candidates. Maximal degree in co-relation 27185. Up to 4567 conditions per place. [2024-06-21 17:13:44,690 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 203 selfloop transitions, 26 changer transitions 0/234 dead transitions. [2024-06-21 17:13:44,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 234 transitions, 2683 flow [2024-06-21 17:13:44,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:13:44,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:13:44,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 17:13:44,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-21 17:13:44,695 INFO L175 Difference]: Start difference. First operand has 192 places, 210 transitions, 2025 flow. Second operand 7 states and 120 transitions. [2024-06-21 17:13:44,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 234 transitions, 2683 flow [2024-06-21 17:13:44,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 234 transitions, 2609 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 17:13:44,934 INFO L231 Difference]: Finished difference. Result has 196 places, 213 transitions, 2051 flow [2024-06-21 17:13:44,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1963, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2051, PETRI_PLACES=196, PETRI_TRANSITIONS=213} [2024-06-21 17:13:44,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-21 17:13:44,935 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 213 transitions, 2051 flow [2024-06-21 17:13:44,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:44,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:44,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:44,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:13:44,936 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:44,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:44,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1147970868, now seen corresponding path program 3 times [2024-06-21 17:13:44,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:44,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069206333] [2024-06-21 17:13:44,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:44,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:46,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:46,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069206333] [2024-06-21 17:13:46,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069206333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:46,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:46,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:13:46,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017978811] [2024-06-21 17:13:46,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:46,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:13:46,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:46,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:13:46,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:13:46,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:13:46,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 213 transitions, 2051 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:46,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:46,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:13:46,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:48,415 INFO L124 PetriNetUnfolderBase]: 2887/4942 cut-off events. [2024-06-21 17:13:48,415 INFO L125 PetriNetUnfolderBase]: For 178419/178423 co-relation queries the response was YES. [2024-06-21 17:13:48,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27061 conditions, 4942 events. 2887/4942 cut-off events. For 178419/178423 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 32373 event pairs, 679 based on Foata normal form. 4/4946 useless extension candidates. Maximal degree in co-relation 26972. Up to 4562 conditions per place. [2024-06-21 17:13:48,462 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 197 selfloop transitions, 26 changer transitions 0/228 dead transitions. [2024-06-21 17:13:48,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 228 transitions, 2535 flow [2024-06-21 17:13:48,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:13:48,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:13:48,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 17:13:48,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-21 17:13:48,463 INFO L175 Difference]: Start difference. First operand has 196 places, 213 transitions, 2051 flow. Second operand 7 states and 114 transitions. [2024-06-21 17:13:48,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 228 transitions, 2535 flow [2024-06-21 17:13:48,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 228 transitions, 2467 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 17:13:48,730 INFO L231 Difference]: Finished difference. Result has 199 places, 213 transitions, 2041 flow [2024-06-21 17:13:48,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1983, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2041, PETRI_PLACES=199, PETRI_TRANSITIONS=213} [2024-06-21 17:13:48,740 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-21 17:13:48,740 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 213 transitions, 2041 flow [2024-06-21 17:13:48,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:48,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:48,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:48,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 17:13:48,741 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:48,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:48,741 INFO L85 PathProgramCache]: Analyzing trace with hash 591232440, now seen corresponding path program 1 times [2024-06-21 17:13:48,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:48,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779557359] [2024-06-21 17:13:48,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:48,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:48,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:51,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:51,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779557359] [2024-06-21 17:13:51,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779557359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:51,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:51,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:13:51,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068156230] [2024-06-21 17:13:51,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:51,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:13:51,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:51,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:13:51,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:13:51,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:13:51,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 213 transitions, 2041 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:51,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:51,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:13:51,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:52,594 INFO L124 PetriNetUnfolderBase]: 2929/5001 cut-off events. [2024-06-21 17:13:52,595 INFO L125 PetriNetUnfolderBase]: For 190532/190542 co-relation queries the response was YES. [2024-06-21 17:13:52,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27779 conditions, 5001 events. 2929/5001 cut-off events. For 190532/190542 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 32736 event pairs, 668 based on Foata normal form. 12/5013 useless extension candidates. Maximal degree in co-relation 27689. Up to 4577 conditions per place. [2024-06-21 17:13:52,639 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 220 selfloop transitions, 33 changer transitions 0/258 dead transitions. [2024-06-21 17:13:52,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 258 transitions, 3025 flow [2024-06-21 17:13:52,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:13:52,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:13:52,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:13:52,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 17:13:52,641 INFO L175 Difference]: Start difference. First operand has 199 places, 213 transitions, 2041 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:13:52,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 258 transitions, 3025 flow [2024-06-21 17:13:52,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 258 transitions, 2945 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 17:13:52,881 INFO L231 Difference]: Finished difference. Result has 201 places, 226 transitions, 2230 flow [2024-06-21 17:13:52,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1961, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2230, PETRI_PLACES=201, PETRI_TRANSITIONS=226} [2024-06-21 17:13:52,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-21 17:13:52,882 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 226 transitions, 2230 flow [2024-06-21 17:13:52,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:52,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:52,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:52,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 17:13:52,882 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:52,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:52,883 INFO L85 PathProgramCache]: Analyzing trace with hash 883422320, now seen corresponding path program 2 times [2024-06-21 17:13:52,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:52,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044662358] [2024-06-21 17:13:52,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:52,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:55,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:55,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044662358] [2024-06-21 17:13:55,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044662358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:55,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:55,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:13:55,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174265874] [2024-06-21 17:13:55,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:55,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:13:55,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:55,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:13:55,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:13:55,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:13:55,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 226 transitions, 2230 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:55,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:55,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:13:55,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:56,800 INFO L124 PetriNetUnfolderBase]: 2923/4993 cut-off events. [2024-06-21 17:13:56,801 INFO L125 PetriNetUnfolderBase]: For 194740/194750 co-relation queries the response was YES. [2024-06-21 17:13:56,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27994 conditions, 4993 events. 2923/4993 cut-off events. For 194740/194750 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 32702 event pairs, 668 based on Foata normal form. 12/5005 useless extension candidates. Maximal degree in co-relation 27903. Up to 4572 conditions per place. [2024-06-21 17:13:56,845 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 214 selfloop transitions, 31 changer transitions 0/250 dead transitions. [2024-06-21 17:13:56,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 250 transitions, 2900 flow [2024-06-21 17:13:56,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:13:56,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:13:56,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 17:13:56,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 17:13:56,846 INFO L175 Difference]: Start difference. First operand has 201 places, 226 transitions, 2230 flow. Second operand 7 states and 121 transitions. [2024-06-21 17:13:56,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 250 transitions, 2900 flow [2024-06-21 17:13:57,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 250 transitions, 2754 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-21 17:13:57,119 INFO L231 Difference]: Finished difference. Result has 203 places, 226 transitions, 2153 flow [2024-06-21 17:13:57,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2084, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2153, PETRI_PLACES=203, PETRI_TRANSITIONS=226} [2024-06-21 17:13:57,120 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-21 17:13:57,120 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 226 transitions, 2153 flow [2024-06-21 17:13:57,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:57,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:57,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:57,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 17:13:57,121 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:57,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:57,121 INFO L85 PathProgramCache]: Analyzing trace with hash 597907608, now seen corresponding path program 1 times [2024-06-21 17:13:57,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:57,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651359735] [2024-06-21 17:13:57,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:57,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:00,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:00,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651359735] [2024-06-21 17:14:00,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651359735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:00,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:00,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:14:00,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051976610] [2024-06-21 17:14:00,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:00,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:14:00,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:00,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:14:00,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:14:00,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 17:14:00,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 226 transitions, 2153 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:00,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:00,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 17:14:00,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:01,514 INFO L124 PetriNetUnfolderBase]: 2654/4635 cut-off events. [2024-06-21 17:14:01,514 INFO L125 PetriNetUnfolderBase]: For 214369/214404 co-relation queries the response was YES. [2024-06-21 17:14:01,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26335 conditions, 4635 events. 2654/4635 cut-off events. For 214369/214404 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 31225 event pairs, 606 based on Foata normal form. 23/4568 useless extension candidates. Maximal degree in co-relation 26243. Up to 3967 conditions per place. [2024-06-21 17:14:01,554 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 176 selfloop transitions, 32 changer transitions 0/252 dead transitions. [2024-06-21 17:14:01,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 252 transitions, 2675 flow [2024-06-21 17:14:01,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:14:01,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:14:01,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 17:14:01,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-21 17:14:01,556 INFO L175 Difference]: Start difference. First operand has 203 places, 226 transitions, 2153 flow. Second operand 7 states and 131 transitions. [2024-06-21 17:14:01,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 252 transitions, 2675 flow [2024-06-21 17:14:01,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 252 transitions, 2613 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 17:14:01,778 INFO L231 Difference]: Finished difference. Result has 204 places, 227 transitions, 2184 flow [2024-06-21 17:14:01,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2091, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2184, PETRI_PLACES=204, PETRI_TRANSITIONS=227} [2024-06-21 17:14:01,779 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-21 17:14:01,779 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 227 transitions, 2184 flow [2024-06-21 17:14:01,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:01,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:01,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:01,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 17:14:01,779 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:01,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:01,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1799306714, now seen corresponding path program 3 times [2024-06-21 17:14:01,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:01,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986730755] [2024-06-21 17:14:01,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:01,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:04,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:04,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986730755] [2024-06-21 17:14:04,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986730755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:04,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:04,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:14:04,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595804311] [2024-06-21 17:14:04,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:04,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:14:04,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:04,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:14:04,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:14:04,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:04,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 227 transitions, 2184 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:04,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:04,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:04,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:05,934 INFO L124 PetriNetUnfolderBase]: 2961/5054 cut-off events. [2024-06-21 17:14:05,935 INFO L125 PetriNetUnfolderBase]: For 203789/203801 co-relation queries the response was YES. [2024-06-21 17:14:05,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28242 conditions, 5054 events. 2961/5054 cut-off events. For 203789/203801 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 33176 event pairs, 685 based on Foata normal form. 14/5068 useless extension candidates. Maximal degree in co-relation 28149. Up to 4665 conditions per place. [2024-06-21 17:14:05,975 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 224 selfloop transitions, 22 changer transitions 0/251 dead transitions. [2024-06-21 17:14:05,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 251 transitions, 2763 flow [2024-06-21 17:14:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:14:05,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:14:05,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 17:14:05,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 17:14:05,976 INFO L175 Difference]: Start difference. First operand has 204 places, 227 transitions, 2184 flow. Second operand 7 states and 118 transitions. [2024-06-21 17:14:05,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 251 transitions, 2763 flow [2024-06-21 17:14:06,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 251 transitions, 2668 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 17:14:06,192 INFO L231 Difference]: Finished difference. Result has 206 places, 228 transitions, 2158 flow [2024-06-21 17:14:06,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2099, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2158, PETRI_PLACES=206, PETRI_TRANSITIONS=228} [2024-06-21 17:14:06,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-21 17:14:06,193 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 228 transitions, 2158 flow [2024-06-21 17:14:06,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:06,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:06,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:06,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 17:14:06,194 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:06,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:06,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1799722424, now seen corresponding path program 4 times [2024-06-21 17:14:06,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:06,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552875783] [2024-06-21 17:14:06,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:06,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:08,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:08,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552875783] [2024-06-21 17:14:08,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552875783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:08,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:08,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:14:08,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879234508] [2024-06-21 17:14:08,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:08,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:14:08,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:08,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:14:08,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:14:08,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:08,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 228 transitions, 2158 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:08,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:08,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:08,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:09,854 INFO L124 PetriNetUnfolderBase]: 2971/5068 cut-off events. [2024-06-21 17:14:09,855 INFO L125 PetriNetUnfolderBase]: For 209384/209396 co-relation queries the response was YES. [2024-06-21 17:14:09,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28303 conditions, 5068 events. 2971/5068 cut-off events. For 209384/209396 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 33282 event pairs, 674 based on Foata normal form. 14/5082 useless extension candidates. Maximal degree in co-relation 28209. Up to 4598 conditions per place. [2024-06-21 17:14:09,904 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 209 selfloop transitions, 46 changer transitions 0/260 dead transitions. [2024-06-21 17:14:09,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 260 transitions, 2980 flow [2024-06-21 17:14:09,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:14:09,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:14:09,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 17:14:09,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 17:14:09,906 INFO L175 Difference]: Start difference. First operand has 206 places, 228 transitions, 2158 flow. Second operand 7 states and 121 transitions. [2024-06-21 17:14:09,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 260 transitions, 2980 flow [2024-06-21 17:14:10,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 260 transitions, 2936 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 17:14:10,196 INFO L231 Difference]: Finished difference. Result has 209 places, 237 transitions, 2369 flow [2024-06-21 17:14:10,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2369, PETRI_PLACES=209, PETRI_TRANSITIONS=237} [2024-06-21 17:14:10,197 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-21 17:14:10,197 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 237 transitions, 2369 flow [2024-06-21 17:14:10,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:10,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:10,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:10,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 17:14:10,198 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:10,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:10,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1227351898, now seen corresponding path program 5 times [2024-06-21 17:14:10,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:10,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141979632] [2024-06-21 17:14:10,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:10,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:12,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:12,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141979632] [2024-06-21 17:14:12,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141979632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:12,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:12,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:14:12,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676572001] [2024-06-21 17:14:12,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:12,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:14:12,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:12,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:14:12,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:14:12,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:12,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 237 transitions, 2369 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:12,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:12,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:12,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:13,707 INFO L124 PetriNetUnfolderBase]: 2981/5085 cut-off events. [2024-06-21 17:14:13,707 INFO L125 PetriNetUnfolderBase]: For 217605/217631 co-relation queries the response was YES. [2024-06-21 17:14:13,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28891 conditions, 5085 events. 2981/5085 cut-off events. For 217605/217631 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 33390 event pairs, 683 based on Foata normal form. 22/5107 useless extension candidates. Maximal degree in co-relation 28795. Up to 4608 conditions per place. [2024-06-21 17:14:13,756 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 204 selfloop transitions, 49 changer transitions 0/258 dead transitions. [2024-06-21 17:14:13,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 258 transitions, 3103 flow [2024-06-21 17:14:13,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:14:13,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:14:13,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 17:14:13,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 17:14:13,758 INFO L175 Difference]: Start difference. First operand has 209 places, 237 transitions, 2369 flow. Second operand 7 states and 116 transitions. [2024-06-21 17:14:13,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 258 transitions, 3103 flow [2024-06-21 17:14:14,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 258 transitions, 3013 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-21 17:14:14,064 INFO L231 Difference]: Finished difference. Result has 214 places, 240 transitions, 2441 flow [2024-06-21 17:14:14,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2285, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2441, PETRI_PLACES=214, PETRI_TRANSITIONS=240} [2024-06-21 17:14:14,065 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-21 17:14:14,065 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 240 transitions, 2441 flow [2024-06-21 17:14:14,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:14,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:14,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:14,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 17:14:14,065 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:14,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:14,066 INFO L85 PathProgramCache]: Analyzing trace with hash -384162918, now seen corresponding path program 6 times [2024-06-21 17:14:14,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:14,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993047735] [2024-06-21 17:14:14,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:14,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:16,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:16,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993047735] [2024-06-21 17:14:16,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993047735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:16,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:16,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:14:16,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728467587] [2024-06-21 17:14:16,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:16,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:14:16,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:16,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:14:16,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:14:16,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:16,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 240 transitions, 2441 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:16,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:16,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:16,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:18,090 INFO L124 PetriNetUnfolderBase]: 2975/5077 cut-off events. [2024-06-21 17:14:18,090 INFO L125 PetriNetUnfolderBase]: For 219174/219200 co-relation queries the response was YES. [2024-06-21 17:14:18,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28685 conditions, 5077 events. 2975/5077 cut-off events. For 219174/219200 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 33343 event pairs, 683 based on Foata normal form. 22/5099 useless extension candidates. Maximal degree in co-relation 28586. Up to 4603 conditions per place. [2024-06-21 17:14:18,138 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 204 selfloop transitions, 48 changer transitions 0/257 dead transitions. [2024-06-21 17:14:18,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 257 transitions, 2995 flow [2024-06-21 17:14:18,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:14:18,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:14:18,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 17:14:18,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-21 17:14:18,140 INFO L175 Difference]: Start difference. First operand has 214 places, 240 transitions, 2441 flow. Second operand 7 states and 115 transitions. [2024-06-21 17:14:18,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 257 transitions, 2995 flow [2024-06-21 17:14:18,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 257 transitions, 2846 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-21 17:14:18,392 INFO L231 Difference]: Finished difference. Result has 217 places, 240 transitions, 2394 flow [2024-06-21 17:14:18,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2292, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2394, PETRI_PLACES=217, PETRI_TRANSITIONS=240} [2024-06-21 17:14:18,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-21 17:14:18,392 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 240 transitions, 2394 flow [2024-06-21 17:14:18,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:18,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:18,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:18,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 17:14:18,393 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:18,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:18,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2097898882, now seen corresponding path program 2 times [2024-06-21 17:14:18,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:18,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131645615] [2024-06-21 17:14:18,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:18,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:21,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:21,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131645615] [2024-06-21 17:14:21,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131645615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:21,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:21,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:14:21,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479727771] [2024-06-21 17:14:21,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:21,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:14:21,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:21,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:14:21,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:14:21,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 17:14:21,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 240 transitions, 2394 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:21,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:21,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 17:14:21,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:22,754 INFO L124 PetriNetUnfolderBase]: 2717/4720 cut-off events. [2024-06-21 17:14:22,755 INFO L125 PetriNetUnfolderBase]: For 242566/242579 co-relation queries the response was YES. [2024-06-21 17:14:22,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27190 conditions, 4720 events. 2717/4720 cut-off events. For 242566/242579 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 31791 event pairs, 614 based on Foata normal form. 22/4649 useless extension candidates. Maximal degree in co-relation 27090. Up to 4044 conditions per place. [2024-06-21 17:14:22,801 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 169 selfloop transitions, 39 changer transitions 0/260 dead transitions. [2024-06-21 17:14:22,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 260 transitions, 2900 flow [2024-06-21 17:14:22,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:14:22,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:14:22,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 17:14:22,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:14:22,802 INFO L175 Difference]: Start difference. First operand has 217 places, 240 transitions, 2394 flow. Second operand 7 states and 126 transitions. [2024-06-21 17:14:22,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 260 transitions, 2900 flow [2024-06-21 17:14:23,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 260 transitions, 2768 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 17:14:23,127 INFO L231 Difference]: Finished difference. Result has 218 places, 241 transitions, 2366 flow [2024-06-21 17:14:23,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2262, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2366, PETRI_PLACES=218, PETRI_TRANSITIONS=241} [2024-06-21 17:14:23,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-21 17:14:23,128 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 241 transitions, 2366 flow [2024-06-21 17:14:23,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:23,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:23,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:23,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 17:14:23,128 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:23,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:23,129 INFO L85 PathProgramCache]: Analyzing trace with hash -375375720, now seen corresponding path program 3 times [2024-06-21 17:14:23,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:23,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173930188] [2024-06-21 17:14:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:23,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:25,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:25,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173930188] [2024-06-21 17:14:25,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173930188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:25,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:25,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:14:25,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100391138] [2024-06-21 17:14:25,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:25,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:14:25,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:25,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:14:25,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:14:26,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 17:14:26,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 241 transitions, 2366 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:26,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:26,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 17:14:26,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:27,500 INFO L124 PetriNetUnfolderBase]: 2715/4722 cut-off events. [2024-06-21 17:14:27,501 INFO L125 PetriNetUnfolderBase]: For 234962/234975 co-relation queries the response was YES. [2024-06-21 17:14:27,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27042 conditions, 4722 events. 2715/4722 cut-off events. For 234962/234975 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 31880 event pairs, 610 based on Foata normal form. 18/4647 useless extension candidates. Maximal degree in co-relation 26942. Up to 3960 conditions per place. [2024-06-21 17:14:27,548 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 169 selfloop transitions, 42 changer transitions 0/263 dead transitions. [2024-06-21 17:14:27,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 263 transitions, 2898 flow [2024-06-21 17:14:27,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:14:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:14:27,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 17:14:27,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 17:14:27,549 INFO L175 Difference]: Start difference. First operand has 218 places, 241 transitions, 2366 flow. Second operand 7 states and 127 transitions. [2024-06-21 17:14:27,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 263 transitions, 2898 flow [2024-06-21 17:14:27,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 263 transitions, 2816 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 17:14:27,868 INFO L231 Difference]: Finished difference. Result has 220 places, 242 transitions, 2394 flow [2024-06-21 17:14:27,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2284, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2394, PETRI_PLACES=220, PETRI_TRANSITIONS=242} [2024-06-21 17:14:27,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-21 17:14:27,869 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 242 transitions, 2394 flow [2024-06-21 17:14:27,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:27,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:27,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:27,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 17:14:27,870 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:27,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:27,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1794968760, now seen corresponding path program 1 times [2024-06-21 17:14:27,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:27,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213617338] [2024-06-21 17:14:27,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:27,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:30,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:30,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213617338] [2024-06-21 17:14:30,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213617338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:30,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:30,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:14:30,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745023428] [2024-06-21 17:14:30,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:30,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:14:30,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:30,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:14:30,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:14:30,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:30,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 242 transitions, 2394 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:30,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:30,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:30,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:31,707 INFO L124 PetriNetUnfolderBase]: 3031/5166 cut-off events. [2024-06-21 17:14:31,707 INFO L125 PetriNetUnfolderBase]: For 232079/232081 co-relation queries the response was YES. [2024-06-21 17:14:31,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29084 conditions, 5166 events. 3031/5166 cut-off events. For 232079/232081 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 34004 event pairs, 706 based on Foata normal form. 2/5168 useless extension candidates. Maximal degree in co-relation 28983. Up to 4805 conditions per place. [2024-06-21 17:14:31,758 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 249 selfloop transitions, 17 changer transitions 0/271 dead transitions. [2024-06-21 17:14:31,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 271 transitions, 3040 flow [2024-06-21 17:14:31,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:14:31,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:14:31,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:14:31,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 17:14:31,760 INFO L175 Difference]: Start difference. First operand has 220 places, 242 transitions, 2394 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:14:31,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 271 transitions, 3040 flow [2024-06-21 17:14:32,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 271 transitions, 2946 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 17:14:32,105 INFO L231 Difference]: Finished difference. Result has 223 places, 245 transitions, 2388 flow [2024-06-21 17:14:32,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2300, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2388, PETRI_PLACES=223, PETRI_TRANSITIONS=245} [2024-06-21 17:14:32,105 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-21 17:14:32,105 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 245 transitions, 2388 flow [2024-06-21 17:14:32,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:32,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:32,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:32,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 17:14:32,106 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:32,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:32,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1576743240, now seen corresponding path program 2 times [2024-06-21 17:14:32,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:32,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317181815] [2024-06-21 17:14:32,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:32,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:34,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:34,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:34,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317181815] [2024-06-21 17:14:34,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317181815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:34,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:34,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:14:34,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806375463] [2024-06-21 17:14:34,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:34,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:14:34,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:34,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:14:34,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:14:34,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:34,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 245 transitions, 2388 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:34,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:34,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:34,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:36,344 INFO L124 PetriNetUnfolderBase]: 3041/5184 cut-off events. [2024-06-21 17:14:36,344 INFO L125 PetriNetUnfolderBase]: For 237945/237947 co-relation queries the response was YES. [2024-06-21 17:14:36,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29459 conditions, 5184 events. 3041/5184 cut-off events. For 237945/237947 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 34145 event pairs, 685 based on Foata normal form. 2/5186 useless extension candidates. Maximal degree in co-relation 29357. Up to 4754 conditions per place. [2024-06-21 17:14:36,393 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 237 selfloop transitions, 36 changer transitions 0/278 dead transitions. [2024-06-21 17:14:36,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 278 transitions, 3228 flow [2024-06-21 17:14:36,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:14:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:14:36,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 17:14:36,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 17:14:36,395 INFO L175 Difference]: Start difference. First operand has 223 places, 245 transitions, 2388 flow. Second operand 8 states and 138 transitions. [2024-06-21 17:14:36,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 278 transitions, 3228 flow [2024-06-21 17:14:36,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 278 transitions, 3162 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 17:14:36,751 INFO L231 Difference]: Finished difference. Result has 225 places, 251 transitions, 2502 flow [2024-06-21 17:14:36,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2322, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2502, PETRI_PLACES=225, PETRI_TRANSITIONS=251} [2024-06-21 17:14:36,751 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-21 17:14:36,752 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 251 transitions, 2502 flow [2024-06-21 17:14:36,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:36,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:36,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:36,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 17:14:36,752 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:36,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:36,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1799737304, now seen corresponding path program 1 times [2024-06-21 17:14:36,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:36,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996337385] [2024-06-21 17:14:36,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:36,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:39,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:39,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:39,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996337385] [2024-06-21 17:14:39,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996337385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:39,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:39,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:14:39,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370548663] [2024-06-21 17:14:39,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:39,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:14:39,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:39,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:14:39,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:14:39,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:39,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 251 transitions, 2502 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:39,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:39,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:39,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:41,012 INFO L124 PetriNetUnfolderBase]: 3049/5196 cut-off events. [2024-06-21 17:14:41,012 INFO L125 PetriNetUnfolderBase]: For 247232/247234 co-relation queries the response was YES. [2024-06-21 17:14:41,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30058 conditions, 5196 events. 3049/5196 cut-off events. For 247232/247234 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 34268 event pairs, 690 based on Foata normal form. 2/5198 useless extension candidates. Maximal degree in co-relation 29955. Up to 4833 conditions per place. [2024-06-21 17:14:41,058 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 250 selfloop transitions, 18 changer transitions 0/273 dead transitions. [2024-06-21 17:14:41,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 273 transitions, 3132 flow [2024-06-21 17:14:41,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:14:41,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:14:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 17:14:41,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 17:14:41,059 INFO L175 Difference]: Start difference. First operand has 225 places, 251 transitions, 2502 flow. Second operand 7 states and 116 transitions. [2024-06-21 17:14:41,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 273 transitions, 3132 flow [2024-06-21 17:14:41,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 273 transitions, 3056 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 17:14:41,385 INFO L231 Difference]: Finished difference. Result has 228 places, 253 transitions, 2513 flow [2024-06-21 17:14:41,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2426, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2513, PETRI_PLACES=228, PETRI_TRANSITIONS=253} [2024-06-21 17:14:41,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-21 17:14:41,386 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 253 transitions, 2513 flow [2024-06-21 17:14:41,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:41,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:41,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:41,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 17:14:41,386 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:41,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:41,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1799730360, now seen corresponding path program 3 times [2024-06-21 17:14:41,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:41,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122382738] [2024-06-21 17:14:41,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:41,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:43,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:43,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:43,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122382738] [2024-06-21 17:14:43,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122382738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:43,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:43,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:14:43,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704684077] [2024-06-21 17:14:43,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:43,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:14:43,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:43,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:14:43,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:14:43,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:43,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 253 transitions, 2513 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:43,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:43,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:43,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:45,981 INFO L124 PetriNetUnfolderBase]: 3059/5214 cut-off events. [2024-06-21 17:14:45,981 INFO L125 PetriNetUnfolderBase]: For 254457/254459 co-relation queries the response was YES. [2024-06-21 17:14:46,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30331 conditions, 5214 events. 3059/5214 cut-off events. For 254457/254459 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 34413 event pairs, 687 based on Foata normal form. 2/5216 useless extension candidates. Maximal degree in co-relation 30226. Up to 4776 conditions per place. [2024-06-21 17:14:46,025 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 236 selfloop transitions, 38 changer transitions 0/279 dead transitions. [2024-06-21 17:14:46,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 279 transitions, 3297 flow [2024-06-21 17:14:46,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:14:46,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:14:46,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:14:46,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 17:14:46,027 INFO L175 Difference]: Start difference. First operand has 228 places, 253 transitions, 2513 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:14:46,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 279 transitions, 3297 flow [2024-06-21 17:14:46,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 279 transitions, 3226 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 17:14:46,375 INFO L231 Difference]: Finished difference. Result has 231 places, 256 transitions, 2570 flow [2024-06-21 17:14:46,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2442, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2570, PETRI_PLACES=231, PETRI_TRANSITIONS=256} [2024-06-21 17:14:46,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-21 17:14:46,375 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 256 transitions, 2570 flow [2024-06-21 17:14:46,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:46,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:46,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:46,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 17:14:46,376 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:46,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:46,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1227597418, now seen corresponding path program 2 times [2024-06-21 17:14:46,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:46,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572295152] [2024-06-21 17:14:46,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:46,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:46,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:49,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:49,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572295152] [2024-06-21 17:14:49,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572295152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:49,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:49,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:14:49,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139598936] [2024-06-21 17:14:49,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:49,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:14:49,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:49,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:14:49,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:14:49,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:49,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 256 transitions, 2570 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:49,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:49,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:49,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:50,585 INFO L124 PetriNetUnfolderBase]: 3067/5227 cut-off events. [2024-06-21 17:14:50,586 INFO L125 PetriNetUnfolderBase]: For 261624/261628 co-relation queries the response was YES. [2024-06-21 17:14:50,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30550 conditions, 5227 events. 3067/5227 cut-off events. For 261624/261628 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 34492 event pairs, 692 based on Foata normal form. 4/5231 useless extension candidates. Maximal degree in co-relation 30444. Up to 4859 conditions per place. [2024-06-21 17:14:50,629 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 250 selfloop transitions, 18 changer transitions 0/273 dead transitions. [2024-06-21 17:14:50,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 273 transitions, 3190 flow [2024-06-21 17:14:50,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:14:50,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:14:50,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 17:14:50,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-21 17:14:50,630 INFO L175 Difference]: Start difference. First operand has 231 places, 256 transitions, 2570 flow. Second operand 7 states and 111 transitions. [2024-06-21 17:14:50,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 273 transitions, 3190 flow [2024-06-21 17:14:50,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 273 transitions, 3100 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 17:14:50,928 INFO L231 Difference]: Finished difference. Result has 233 places, 258 transitions, 2571 flow [2024-06-21 17:14:50,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2480, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2571, PETRI_PLACES=233, PETRI_TRANSITIONS=258} [2024-06-21 17:14:50,928 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-21 17:14:50,928 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 258 transitions, 2571 flow [2024-06-21 17:14:50,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:50,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:50,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:50,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 17:14:50,929 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:50,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:50,929 INFO L85 PathProgramCache]: Analyzing trace with hash -375369768, now seen corresponding path program 3 times [2024-06-21 17:14:50,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:50,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107029188] [2024-06-21 17:14:50,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:50,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:53,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:53,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107029188] [2024-06-21 17:14:53,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107029188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:53,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:53,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:14:53,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000056481] [2024-06-21 17:14:53,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:53,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:14:53,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:53,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:14:53,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:14:53,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:53,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 258 transitions, 2571 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:53,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:53,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:53,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:55,244 INFO L124 PetriNetUnfolderBase]: 3062/5220 cut-off events. [2024-06-21 17:14:55,245 INFO L125 PetriNetUnfolderBase]: For 264464/264468 co-relation queries the response was YES. [2024-06-21 17:14:55,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30434 conditions, 5220 events. 3062/5220 cut-off events. For 264464/264468 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 34433 event pairs, 683 based on Foata normal form. 4/5224 useless extension candidates. Maximal degree in co-relation 30327. Up to 4832 conditions per place. [2024-06-21 17:14:55,303 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 247 selfloop transitions, 23 changer transitions 0/275 dead transitions. [2024-06-21 17:14:55,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 275 transitions, 3199 flow [2024-06-21 17:14:55,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:14:55,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:14:55,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 17:14:55,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-21 17:14:55,305 INFO L175 Difference]: Start difference. First operand has 233 places, 258 transitions, 2571 flow. Second operand 7 states and 111 transitions. [2024-06-21 17:14:55,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 275 transitions, 3199 flow [2024-06-21 17:14:55,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 275 transitions, 3124 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 17:14:55,750 INFO L231 Difference]: Finished difference. Result has 235 places, 260 transitions, 2601 flow [2024-06-21 17:14:55,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2496, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2601, PETRI_PLACES=235, PETRI_TRANSITIONS=260} [2024-06-21 17:14:55,758 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-21 17:14:55,758 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 260 transitions, 2601 flow [2024-06-21 17:14:55,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:55,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:55,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:55,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 17:14:55,759 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:55,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:55,759 INFO L85 PathProgramCache]: Analyzing trace with hash -171420150, now seen corresponding path program 4 times [2024-06-21 17:14:55,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:55,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568811995] [2024-06-21 17:14:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:55,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:58,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:58,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568811995] [2024-06-21 17:14:58,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568811995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:58,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:58,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:14:58,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859570157] [2024-06-21 17:14:58,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:58,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:14:58,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:58,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:14:58,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:14:58,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:58,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 260 transitions, 2601 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:58,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:58,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:58,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:59,736 INFO L124 PetriNetUnfolderBase]: 3056/5212 cut-off events. [2024-06-21 17:14:59,737 INFO L125 PetriNetUnfolderBase]: For 267001/267003 co-relation queries the response was YES. [2024-06-21 17:14:59,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30370 conditions, 5212 events. 3056/5212 cut-off events. For 267001/267003 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 34354 event pairs, 705 based on Foata normal form. 2/5213 useless extension candidates. Maximal degree in co-relation 30262. Up to 4776 conditions per place. [2024-06-21 17:14:59,788 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 234 selfloop transitions, 38 changer transitions 0/277 dead transitions. [2024-06-21 17:14:59,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 277 transitions, 3187 flow [2024-06-21 17:14:59,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:14:59,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:14:59,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 17:14:59,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-21 17:14:59,789 INFO L175 Difference]: Start difference. First operand has 235 places, 260 transitions, 2601 flow. Second operand 8 states and 129 transitions. [2024-06-21 17:14:59,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 277 transitions, 3187 flow [2024-06-21 17:15:00,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 277 transitions, 3076 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 17:15:00,140 INFO L231 Difference]: Finished difference. Result has 238 places, 260 transitions, 2572 flow [2024-06-21 17:15:00,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2490, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2572, PETRI_PLACES=238, PETRI_TRANSITIONS=260} [2024-06-21 17:15:00,140 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-21 17:15:00,140 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 260 transitions, 2572 flow [2024-06-21 17:15:00,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:00,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:00,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:00,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 17:15:00,141 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:00,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:00,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1029858137, now seen corresponding path program 1 times [2024-06-21 17:15:00,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:00,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993371435] [2024-06-21 17:15:00,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:00,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:02,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:02,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993371435] [2024-06-21 17:15:02,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993371435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:02,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:02,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:02,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669904640] [2024-06-21 17:15:02,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:02,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:02,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:02,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:02,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:02,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:15:02,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 260 transitions, 2572 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:02,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:02,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:15:02,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:04,506 INFO L124 PetriNetUnfolderBase]: 2927/5052 cut-off events. [2024-06-21 17:15:04,506 INFO L125 PetriNetUnfolderBase]: For 267327/267337 co-relation queries the response was YES. [2024-06-21 17:15:04,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29073 conditions, 5052 events. 2927/5052 cut-off events. For 267327/267337 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 33688 event pairs, 562 based on Foata normal form. 16/5040 useless extension candidates. Maximal degree in co-relation 28964. Up to 4360 conditions per place. [2024-06-21 17:15:04,559 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 239 selfloop transitions, 39 changer transitions 0/307 dead transitions. [2024-06-21 17:15:04,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 307 transitions, 3310 flow [2024-06-21 17:15:04,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:15:04,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:15:04,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-21 17:15:04,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:15:04,560 INFO L175 Difference]: Start difference. First operand has 238 places, 260 transitions, 2572 flow. Second operand 10 states and 180 transitions. [2024-06-21 17:15:04,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 307 transitions, 3310 flow [2024-06-21 17:15:04,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 307 transitions, 3192 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 17:15:04,892 INFO L231 Difference]: Finished difference. Result has 241 places, 261 transitions, 2562 flow [2024-06-21 17:15:04,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2454, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2562, PETRI_PLACES=241, PETRI_TRANSITIONS=261} [2024-06-21 17:15:04,893 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-21 17:15:04,893 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 261 transitions, 2562 flow [2024-06-21 17:15:04,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:04,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:04,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:04,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 17:15:04,893 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:04,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:04,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1143540593, now seen corresponding path program 1 times [2024-06-21 17:15:04,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:04,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50844832] [2024-06-21 17:15:04,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:04,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:07,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:07,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50844832] [2024-06-21 17:15:07,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50844832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:07,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:07,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:07,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552739369] [2024-06-21 17:15:07,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:07,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:07,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:07,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:07,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:07,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:15:07,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 261 transitions, 2562 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:07,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:07,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:15:07,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:09,133 INFO L124 PetriNetUnfolderBase]: 3094/5273 cut-off events. [2024-06-21 17:15:09,133 INFO L125 PetriNetUnfolderBase]: For 265463/265471 co-relation queries the response was YES. [2024-06-21 17:15:09,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30540 conditions, 5273 events. 3094/5273 cut-off events. For 265463/265471 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 34814 event pairs, 683 based on Foata normal form. 10/5283 useless extension candidates. Maximal degree in co-relation 30429. Up to 4769 conditions per place. [2024-06-21 17:15:09,189 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 253 selfloop transitions, 52 changer transitions 0/310 dead transitions. [2024-06-21 17:15:09,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 310 transitions, 3565 flow [2024-06-21 17:15:09,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:15:09,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:15:09,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-21 17:15:09,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-21 17:15:09,191 INFO L175 Difference]: Start difference. First operand has 241 places, 261 transitions, 2562 flow. Second operand 10 states and 169 transitions. [2024-06-21 17:15:09,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 310 transitions, 3565 flow [2024-06-21 17:15:09,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 310 transitions, 3477 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 17:15:09,700 INFO L231 Difference]: Finished difference. Result has 244 places, 270 transitions, 2732 flow [2024-06-21 17:15:09,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2474, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2732, PETRI_PLACES=244, PETRI_TRANSITIONS=270} [2024-06-21 17:15:09,701 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-21 17:15:09,701 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 270 transitions, 2732 flow [2024-06-21 17:15:09,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:09,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:09,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:09,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 17:15:09,702 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:09,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:09,702 INFO L85 PathProgramCache]: Analyzing trace with hash 671624089, now seen corresponding path program 2 times [2024-06-21 17:15:09,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:09,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704423730] [2024-06-21 17:15:09,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:09,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:12,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:12,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704423730] [2024-06-21 17:15:12,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704423730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:12,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:12,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:12,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998513778] [2024-06-21 17:15:12,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:12,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:12,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:12,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:12,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:12,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:15:12,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 270 transitions, 2732 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:12,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:12,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:15:12,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:14,607 INFO L124 PetriNetUnfolderBase]: 3134/5337 cut-off events. [2024-06-21 17:15:14,608 INFO L125 PetriNetUnfolderBase]: For 274302/274310 co-relation queries the response was YES. [2024-06-21 17:15:14,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31260 conditions, 5337 events. 3134/5337 cut-off events. For 274302/274310 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 35306 event pairs, 683 based on Foata normal form. 10/5347 useless extension candidates. Maximal degree in co-relation 31149. Up to 4801 conditions per place. [2024-06-21 17:15:14,654 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 257 selfloop transitions, 64 changer transitions 0/326 dead transitions. [2024-06-21 17:15:14,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 326 transitions, 3794 flow [2024-06-21 17:15:14,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:15:14,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:15:14,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-06-21 17:15:14,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 17:15:14,656 INFO L175 Difference]: Start difference. First operand has 244 places, 270 transitions, 2732 flow. Second operand 12 states and 195 transitions. [2024-06-21 17:15:14,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 326 transitions, 3794 flow [2024-06-21 17:15:15,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 326 transitions, 3666 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 17:15:15,229 INFO L231 Difference]: Finished difference. Result has 250 places, 282 transitions, 2899 flow [2024-06-21 17:15:15,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2622, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2899, PETRI_PLACES=250, PETRI_TRANSITIONS=282} [2024-06-21 17:15:15,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-21 17:15:15,229 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 282 transitions, 2899 flow [2024-06-21 17:15:15,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:15,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:15,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:15,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 17:15:15,230 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:15,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:15,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1148009243, now seen corresponding path program 3 times [2024-06-21 17:15:15,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:15,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864028722] [2024-06-21 17:15:15,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:15,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:17,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:17,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864028722] [2024-06-21 17:15:17,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864028722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:17,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:17,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:17,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260684939] [2024-06-21 17:15:17,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:17,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:17,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:17,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:17,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:17,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:15:17,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 282 transitions, 2899 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:17,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:17,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:15:17,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:19,476 INFO L124 PetriNetUnfolderBase]: 3176/5401 cut-off events. [2024-06-21 17:15:19,476 INFO L125 PetriNetUnfolderBase]: For 293090/293094 co-relation queries the response was YES. [2024-06-21 17:15:19,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32285 conditions, 5401 events. 3176/5401 cut-off events. For 293090/293094 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 35748 event pairs, 701 based on Foata normal form. 4/5405 useless extension candidates. Maximal degree in co-relation 32172. Up to 4740 conditions per place. [2024-06-21 17:15:19,534 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 234 selfloop transitions, 90 changer transitions 0/329 dead transitions. [2024-06-21 17:15:19,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 329 transitions, 4281 flow [2024-06-21 17:15:19,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:15:19,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:15:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-21 17:15:19,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-21 17:15:19,536 INFO L175 Difference]: Start difference. First operand has 250 places, 282 transitions, 2899 flow. Second operand 11 states and 185 transitions. [2024-06-21 17:15:19,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 329 transitions, 4281 flow [2024-06-21 17:15:20,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 329 transitions, 4113 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-21 17:15:20,150 INFO L231 Difference]: Finished difference. Result has 252 places, 291 transitions, 3121 flow [2024-06-21 17:15:20,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2731, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3121, PETRI_PLACES=252, PETRI_TRANSITIONS=291} [2024-06-21 17:15:20,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-21 17:15:20,150 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 291 transitions, 3121 flow [2024-06-21 17:15:20,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:20,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:20,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:20,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 17:15:20,151 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:20,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:20,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1148187989, now seen corresponding path program 1 times [2024-06-21 17:15:20,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:20,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788638614] [2024-06-21 17:15:20,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:20,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:22,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:22,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788638614] [2024-06-21 17:15:22,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788638614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:22,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:22,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:22,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100896733] [2024-06-21 17:15:22,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:22,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:22,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:22,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:22,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:22,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:15:22,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 291 transitions, 3121 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:22,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:22,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:15:22,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:24,661 INFO L124 PetriNetUnfolderBase]: 3244/5494 cut-off events. [2024-06-21 17:15:24,662 INFO L125 PetriNetUnfolderBase]: For 326400/326408 co-relation queries the response was YES. [2024-06-21 17:15:24,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33846 conditions, 5494 events. 3244/5494 cut-off events. For 326400/326408 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 36312 event pairs, 717 based on Foata normal form. 12/5505 useless extension candidates. Maximal degree in co-relation 33732. Up to 4890 conditions per place. [2024-06-21 17:15:24,722 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 271 selfloop transitions, 65 changer transitions 0/341 dead transitions. [2024-06-21 17:15:24,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 341 transitions, 4375 flow [2024-06-21 17:15:24,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:15:24,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:15:24,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-21 17:15:24,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-21 17:15:24,724 INFO L175 Difference]: Start difference. First operand has 252 places, 291 transitions, 3121 flow. Second operand 11 states and 188 transitions. [2024-06-21 17:15:24,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 341 transitions, 4375 flow [2024-06-21 17:15:25,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 341 transitions, 4204 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-21 17:15:25,388 INFO L231 Difference]: Finished difference. Result has 258 places, 302 transitions, 3274 flow [2024-06-21 17:15:25,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2956, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3274, PETRI_PLACES=258, PETRI_TRANSITIONS=302} [2024-06-21 17:15:25,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-21 17:15:25,389 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 302 transitions, 3274 flow [2024-06-21 17:15:25,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:25,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:25,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:25,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 17:15:25,390 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:25,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:25,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1148337719, now seen corresponding path program 2 times [2024-06-21 17:15:25,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:25,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991077215] [2024-06-21 17:15:25,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:25,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:25,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:28,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:28,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991077215] [2024-06-21 17:15:28,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991077215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:28,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:28,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:28,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302516596] [2024-06-21 17:15:28,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:28,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:28,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:28,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:28,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:28,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:15:28,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 302 transitions, 3274 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:28,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:28,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:15:28,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:29,855 INFO L124 PetriNetUnfolderBase]: 3254/5508 cut-off events. [2024-06-21 17:15:29,856 INFO L125 PetriNetUnfolderBase]: For 327902/327910 co-relation queries the response was YES. [2024-06-21 17:15:29,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34297 conditions, 5508 events. 3254/5508 cut-off events. For 327902/327910 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 36369 event pairs, 717 based on Foata normal form. 10/5517 useless extension candidates. Maximal degree in co-relation 34181. Up to 4900 conditions per place. [2024-06-21 17:15:29,906 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 268 selfloop transitions, 66 changer transitions 0/339 dead transitions. [2024-06-21 17:15:29,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 339 transitions, 4390 flow [2024-06-21 17:15:29,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:15:29,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:15:29,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 17:15:29,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:15:29,908 INFO L175 Difference]: Start difference. First operand has 258 places, 302 transitions, 3274 flow. Second operand 10 states and 175 transitions. [2024-06-21 17:15:29,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 339 transitions, 4390 flow [2024-06-21 17:15:30,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 339 transitions, 4205 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-21 17:15:30,547 INFO L231 Difference]: Finished difference. Result has 262 places, 305 transitions, 3281 flow [2024-06-21 17:15:30,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3115, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3281, PETRI_PLACES=262, PETRI_TRANSITIONS=305} [2024-06-21 17:15:30,547 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-21 17:15:30,547 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 305 transitions, 3281 flow [2024-06-21 17:15:30,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:30,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:30,548 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] [2024-06-21 17:15:30,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 17:15:30,548 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:30,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:30,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1148337533, now seen corresponding path program 4 times [2024-06-21 17:15:30,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:30,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359388387] [2024-06-21 17:15:30,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:30,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:33,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:33,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359388387] [2024-06-21 17:15:33,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359388387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:33,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:33,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:33,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784201339] [2024-06-21 17:15:33,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:33,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:33,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:33,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:33,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:33,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:15:33,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 305 transitions, 3281 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:33,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:33,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:15:33,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:34,856 INFO L124 PetriNetUnfolderBase]: 3264/5531 cut-off events. [2024-06-21 17:15:34,856 INFO L125 PetriNetUnfolderBase]: For 335380/335384 co-relation queries the response was YES. [2024-06-21 17:15:34,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34433 conditions, 5531 events. 3264/5531 cut-off events. For 335380/335384 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 36667 event pairs, 706 based on Foata normal form. 4/5535 useless extension candidates. Maximal degree in co-relation 34315. Up to 4858 conditions per place. [2024-06-21 17:15:34,917 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 244 selfloop transitions, 91 changer transitions 0/340 dead transitions. [2024-06-21 17:15:34,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 340 transitions, 4379 flow [2024-06-21 17:15:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:15:34,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:15:34,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-21 17:15:34,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-21 17:15:34,919 INFO L175 Difference]: Start difference. First operand has 262 places, 305 transitions, 3281 flow. Second operand 10 states and 169 transitions. [2024-06-21 17:15:34,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 340 transitions, 4379 flow [2024-06-21 17:15:35,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 340 transitions, 4242 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 17:15:35,629 INFO L231 Difference]: Finished difference. Result has 265 places, 308 transitions, 3374 flow [2024-06-21 17:15:35,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3144, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3374, PETRI_PLACES=265, PETRI_TRANSITIONS=308} [2024-06-21 17:15:35,629 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-21 17:15:35,630 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 308 transitions, 3374 flow [2024-06-21 17:15:35,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:35,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:35,630 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] [2024-06-21 17:15:35,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 17:15:35,630 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:35,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:35,631 INFO L85 PathProgramCache]: Analyzing trace with hash 627166927, now seen corresponding path program 3 times [2024-06-21 17:15:35,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:35,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077798641] [2024-06-21 17:15:35,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:35,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:38,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:38,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077798641] [2024-06-21 17:15:38,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077798641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:38,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:38,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:38,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040296208] [2024-06-21 17:15:38,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:38,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:38,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:38,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:38,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:38,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:15:38,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 308 transitions, 3374 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:38,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:38,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:15:38,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:39,959 INFO L124 PetriNetUnfolderBase]: 3258/5516 cut-off events. [2024-06-21 17:15:39,959 INFO L125 PetriNetUnfolderBase]: For 337835/337843 co-relation queries the response was YES. [2024-06-21 17:15:40,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34411 conditions, 5516 events. 3258/5516 cut-off events. For 337835/337843 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 36467 event pairs, 719 based on Foata normal form. 10/5525 useless extension candidates. Maximal degree in co-relation 34292. Up to 4909 conditions per place. [2024-06-21 17:15:40,018 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 265 selfloop transitions, 64 changer transitions 0/334 dead transitions. [2024-06-21 17:15:40,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 334 transitions, 4260 flow [2024-06-21 17:15:40,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:15:40,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:15:40,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:15:40,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:15:40,020 INFO L175 Difference]: Start difference. First operand has 265 places, 308 transitions, 3374 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:15:40,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 334 transitions, 4260 flow [2024-06-21 17:15:40,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 334 transitions, 4060 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 17:15:40,786 INFO L231 Difference]: Finished difference. Result has 266 places, 308 transitions, 3308 flow [2024-06-21 17:15:40,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3174, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3308, PETRI_PLACES=266, PETRI_TRANSITIONS=308} [2024-06-21 17:15:40,787 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-21 17:15:40,787 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 308 transitions, 3308 flow [2024-06-21 17:15:40,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:40,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:40,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:40,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 17:15:40,788 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:40,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:40,788 INFO L85 PathProgramCache]: Analyzing trace with hash 682348849, now seen corresponding path program 5 times [2024-06-21 17:15:40,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:40,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291232587] [2024-06-21 17:15:40,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:40,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:43,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:43,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291232587] [2024-06-21 17:15:43,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291232587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:43,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:43,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:43,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650296917] [2024-06-21 17:15:43,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:43,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:43,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:43,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:43,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:43,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:15:43,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 308 transitions, 3308 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:43,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:43,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:15:43,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:45,209 INFO L124 PetriNetUnfolderBase]: 3252/5514 cut-off events. [2024-06-21 17:15:45,209 INFO L125 PetriNetUnfolderBase]: For 338941/338943 co-relation queries the response was YES. [2024-06-21 17:15:45,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34177 conditions, 5514 events. 3252/5514 cut-off events. For 338941/338943 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 36472 event pairs, 705 based on Foata normal form. 2/5516 useless extension candidates. Maximal degree in co-relation 34057. Up to 5028 conditions per place. [2024-06-21 17:15:45,267 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 281 selfloop transitions, 45 changer transitions 0/331 dead transitions. [2024-06-21 17:15:45,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 331 transitions, 4020 flow [2024-06-21 17:15:45,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:15:45,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:15:45,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:15:45,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 17:15:45,269 INFO L175 Difference]: Start difference. First operand has 266 places, 308 transitions, 3308 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:15:45,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 331 transitions, 4020 flow [2024-06-21 17:15:45,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 331 transitions, 3849 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 17:15:45,978 INFO L231 Difference]: Finished difference. Result has 266 places, 308 transitions, 3237 flow [2024-06-21 17:15:45,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3137, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3237, PETRI_PLACES=266, PETRI_TRANSITIONS=308} [2024-06-21 17:15:45,979 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-21 17:15:45,979 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 308 transitions, 3237 flow [2024-06-21 17:15:45,979 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) [2024-06-21 17:15:45,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:45,979 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] [2024-06-21 17:15:45,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 17:15:45,979 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:45,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:45,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1354990973, now seen corresponding path program 6 times [2024-06-21 17:15:45,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:45,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186874539] [2024-06-21 17:15:45,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:45,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:48,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:48,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186874539] [2024-06-21 17:15:48,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186874539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:48,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:48,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:48,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264049603] [2024-06-21 17:15:48,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:48,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:48,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:48,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:48,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:48,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:15:48,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 308 transitions, 3237 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:48,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:48,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:15:48,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:49,764 INFO L124 PetriNetUnfolderBase]: 3246/5508 cut-off events. [2024-06-21 17:15:49,764 INFO L125 PetriNetUnfolderBase]: For 340283/340287 co-relation queries the response was YES. [2024-06-21 17:15:49,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33924 conditions, 5508 events. 3246/5508 cut-off events. For 340283/340287 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 36496 event pairs, 711 based on Foata normal form. 4/5512 useless extension candidates. Maximal degree in co-relation 33803. Up to 4840 conditions per place. [2024-06-21 17:15:49,825 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 241 selfloop transitions, 86 changer transitions 0/332 dead transitions. [2024-06-21 17:15:49,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 332 transitions, 4111 flow [2024-06-21 17:15:49,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:15:49,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:15:49,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:15:49,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 17:15:49,827 INFO L175 Difference]: Start difference. First operand has 266 places, 308 transitions, 3237 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:15:49,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 332 transitions, 4111 flow [2024-06-21 17:15:50,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 332 transitions, 3950 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 17:15:50,510 INFO L231 Difference]: Finished difference. Result has 266 places, 308 transitions, 3254 flow [2024-06-21 17:15:50,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3076, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3254, PETRI_PLACES=266, PETRI_TRANSITIONS=308} [2024-06-21 17:15:50,510 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-21 17:15:50,510 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 308 transitions, 3254 flow [2024-06-21 17:15:50,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:50,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:50,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:50,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 17:15:50,511 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:50,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:50,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2097635979, now seen corresponding path program 7 times [2024-06-21 17:15:50,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:50,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537225293] [2024-06-21 17:15:50,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:50,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:50,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:52,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:52,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537225293] [2024-06-21 17:15:52,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537225293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:52,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:52,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:52,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158909692] [2024-06-21 17:15:52,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:52,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:52,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:52,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:52,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:52,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:15:52,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 308 transitions, 3254 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:52,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:52,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:15:52,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:54,921 INFO L124 PetriNetUnfolderBase]: 3256/5522 cut-off events. [2024-06-21 17:15:54,921 INFO L125 PetriNetUnfolderBase]: For 348384/348390 co-relation queries the response was YES. [2024-06-21 17:15:54,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34198 conditions, 5522 events. 3256/5522 cut-off events. For 348384/348390 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 36563 event pairs, 733 based on Foata normal form. 3/5524 useless extension candidates. Maximal degree in co-relation 34076. Up to 4984 conditions per place. [2024-06-21 17:15:54,973 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 292 selfloop transitions, 45 changer transitions 0/342 dead transitions. [2024-06-21 17:15:54,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 342 transitions, 4232 flow [2024-06-21 17:15:54,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:15:54,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:15:54,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-21 17:15:54,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-21 17:15:54,975 INFO L175 Difference]: Start difference. First operand has 266 places, 308 transitions, 3254 flow. Second operand 10 states and 163 transitions. [2024-06-21 17:15:54,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 342 transitions, 4232 flow [2024-06-21 17:15:55,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 342 transitions, 4026 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 17:15:55,762 INFO L231 Difference]: Finished difference. Result has 268 places, 311 transitions, 3206 flow [2024-06-21 17:15:55,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3054, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3206, PETRI_PLACES=268, PETRI_TRANSITIONS=311} [2024-06-21 17:15:55,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-21 17:15:55,763 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 311 transitions, 3206 flow [2024-06-21 17:15:55,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:55,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:55,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:55,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 17:15:55,763 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:55,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:55,764 INFO L85 PathProgramCache]: Analyzing trace with hash -199211981, now seen corresponding path program 4 times [2024-06-21 17:15:55,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:55,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988419741] [2024-06-21 17:15:55,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:55,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:58,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:58,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:58,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988419741] [2024-06-21 17:15:58,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988419741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:58,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:58,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:58,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466065894] [2024-06-21 17:15:58,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:58,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:58,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:58,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:58,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:58,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:15:58,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 311 transitions, 3206 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:58,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:58,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:15:58,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:00,032 INFO L124 PetriNetUnfolderBase]: 3276/5557 cut-off events. [2024-06-21 17:16:00,032 INFO L125 PetriNetUnfolderBase]: For 362674/362686 co-relation queries the response was YES. [2024-06-21 17:16:00,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34316 conditions, 5557 events. 3276/5557 cut-off events. For 362674/362686 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 36894 event pairs, 725 based on Foata normal form. 16/5573 useless extension candidates. Maximal degree in co-relation 34193. Up to 5013 conditions per place. [2024-06-21 17:16:00,093 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 293 selfloop transitions, 45 changer transitions 0/343 dead transitions. [2024-06-21 17:16:00,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 343 transitions, 4014 flow [2024-06-21 17:16:00,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:16:00,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:16:00,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 17:16:00,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 17:16:00,095 INFO L175 Difference]: Start difference. First operand has 268 places, 311 transitions, 3206 flow. Second operand 8 states and 138 transitions. [2024-06-21 17:16:00,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 343 transitions, 4014 flow [2024-06-21 17:16:01,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 343 transitions, 3796 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-21 17:16:01,005 INFO L231 Difference]: Finished difference. Result has 267 places, 315 transitions, 3143 flow [2024-06-21 17:16:01,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2988, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3143, PETRI_PLACES=267, PETRI_TRANSITIONS=315} [2024-06-21 17:16:01,006 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-21 17:16:01,006 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 315 transitions, 3143 flow [2024-06-21 17:16:01,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:01,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:01,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:01,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 17:16:01,007 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:01,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:01,007 INFO L85 PathProgramCache]: Analyzing trace with hash -634238627, now seen corresponding path program 5 times [2024-06-21 17:16:01,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:01,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116574445] [2024-06-21 17:16:01,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:01,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:03,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:03,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:03,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116574445] [2024-06-21 17:16:03,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116574445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:03,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:03,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:16:03,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286382954] [2024-06-21 17:16:03,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:03,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:16:03,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:03,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:16:03,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:16:03,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:16:03,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 315 transitions, 3143 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:03,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:03,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:16:03,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:05,466 INFO L124 PetriNetUnfolderBase]: 3280/5561 cut-off events. [2024-06-21 17:16:05,467 INFO L125 PetriNetUnfolderBase]: For 363489/363501 co-relation queries the response was YES. [2024-06-21 17:16:05,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34042 conditions, 5561 events. 3280/5561 cut-off events. For 363489/363501 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 36901 event pairs, 721 based on Foata normal form. 16/5577 useless extension candidates. Maximal degree in co-relation 33919. Up to 4990 conditions per place. [2024-06-21 17:16:05,526 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 292 selfloop transitions, 54 changer transitions 0/351 dead transitions. [2024-06-21 17:16:05,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 351 transitions, 4137 flow [2024-06-21 17:16:05,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:16:05,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:16:05,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-21 17:16:05,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-21 17:16:05,529 INFO L175 Difference]: Start difference. First operand has 267 places, 315 transitions, 3143 flow. Second operand 10 states and 169 transitions. [2024-06-21 17:16:05,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 351 transitions, 4137 flow [2024-06-21 17:16:06,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 351 transitions, 4022 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 17:16:06,185 INFO L231 Difference]: Finished difference. Result has 271 places, 318 transitions, 3188 flow [2024-06-21 17:16:06,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3028, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3188, PETRI_PLACES=271, PETRI_TRANSITIONS=318} [2024-06-21 17:16:06,186 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-21 17:16:06,186 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 318 transitions, 3188 flow [2024-06-21 17:16:06,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:06,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:06,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:06,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 17:16:06,187 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:06,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:06,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1634407787, now seen corresponding path program 6 times [2024-06-21 17:16:06,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:06,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410537854] [2024-06-21 17:16:06,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:06,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:08,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:08,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410537854] [2024-06-21 17:16:08,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410537854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:08,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:08,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:16:08,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731381174] [2024-06-21 17:16:08,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:08,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:16:08,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:08,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:16:08,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:16:08,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:16:08,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 318 transitions, 3188 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:08,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:08,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:16:08,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:10,491 INFO L124 PetriNetUnfolderBase]: 3290/5573 cut-off events. [2024-06-21 17:16:10,492 INFO L125 PetriNetUnfolderBase]: For 364622/364634 co-relation queries the response was YES. [2024-06-21 17:16:10,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34212 conditions, 5573 events. 3290/5573 cut-off events. For 364622/364634 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 37033 event pairs, 680 based on Foata normal form. 14/5587 useless extension candidates. Maximal degree in co-relation 34088. Up to 4912 conditions per place. [2024-06-21 17:16:10,554 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 267 selfloop transitions, 87 changer transitions 0/359 dead transitions. [2024-06-21 17:16:10,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 359 transitions, 4322 flow [2024-06-21 17:16:10,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:16:10,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:16:10,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:16:10,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:16:10,555 INFO L175 Difference]: Start difference. First operand has 271 places, 318 transitions, 3188 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:16:10,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 359 transitions, 4322 flow [2024-06-21 17:16:11,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 359 transitions, 4107 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-21 17:16:11,203 INFO L231 Difference]: Finished difference. Result has 272 places, 330 transitions, 3365 flow [2024-06-21 17:16:11,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3013, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3365, PETRI_PLACES=272, PETRI_TRANSITIONS=330} [2024-06-21 17:16:11,204 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-21 17:16:11,204 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 330 transitions, 3365 flow [2024-06-21 17:16:11,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:11,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:11,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:11,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 17:16:11,206 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:11,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:11,206 INFO L85 PathProgramCache]: Analyzing trace with hash -426963587, now seen corresponding path program 8 times [2024-06-21 17:16:11,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:11,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419877484] [2024-06-21 17:16:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:11,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:13,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:13,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419877484] [2024-06-21 17:16:13,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419877484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:13,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:13,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:16:13,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791324322] [2024-06-21 17:16:13,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:13,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:16:13,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:13,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:16:13,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:16:13,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:16:13,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 330 transitions, 3365 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:13,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:13,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:16:13,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:15,546 INFO L124 PetriNetUnfolderBase]: 3284/5562 cut-off events. [2024-06-21 17:16:15,547 INFO L125 PetriNetUnfolderBase]: For 366900/366906 co-relation queries the response was YES. [2024-06-21 17:16:15,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34413 conditions, 5562 events. 3284/5562 cut-off events. For 366900/366906 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 36817 event pairs, 734 based on Foata normal form. 3/5564 useless extension candidates. Maximal degree in co-relation 34287. Up to 5027 conditions per place. [2024-06-21 17:16:15,610 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 304 selfloop transitions, 44 changer transitions 0/353 dead transitions. [2024-06-21 17:16:15,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 353 transitions, 4123 flow [2024-06-21 17:16:15,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:16:15,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:16:15,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:16:15,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 17:16:15,612 INFO L175 Difference]: Start difference. First operand has 272 places, 330 transitions, 3365 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:16:15,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 353 transitions, 4123 flow [2024-06-21 17:16:16,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 353 transitions, 3980 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-21 17:16:16,468 INFO L231 Difference]: Finished difference. Result has 277 places, 330 transitions, 3316 flow [2024-06-21 17:16:16,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3222, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3316, PETRI_PLACES=277, PETRI_TRANSITIONS=330} [2024-06-21 17:16:16,469 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-21 17:16:16,469 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 330 transitions, 3316 flow [2024-06-21 17:16:16,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:16,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:16,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:16,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 17:16:16,470 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:16,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:16,471 INFO L85 PathProgramCache]: Analyzing trace with hash -56065451, now seen corresponding path program 7 times [2024-06-21 17:16:16,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:16,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800781383] [2024-06-21 17:16:16,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:16,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:16,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:18,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:18,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800781383] [2024-06-21 17:16:18,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800781383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:18,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:18,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:16:18,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504389836] [2024-06-21 17:16:18,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:18,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:16:18,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:18,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:16:18,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:16:18,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:16:18,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 330 transitions, 3316 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:18,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:18,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:16:18,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:20,697 INFO L124 PetriNetUnfolderBase]: 3278/5559 cut-off events. [2024-06-21 17:16:20,697 INFO L125 PetriNetUnfolderBase]: For 366851/366863 co-relation queries the response was YES. [2024-06-21 17:16:20,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34310 conditions, 5559 events. 3278/5559 cut-off events. For 366851/366863 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 36896 event pairs, 722 based on Foata normal form. 14/5573 useless extension candidates. Maximal degree in co-relation 34182. Up to 4991 conditions per place. [2024-06-21 17:16:20,754 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 293 selfloop transitions, 57 changer transitions 0/355 dead transitions. [2024-06-21 17:16:20,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 355 transitions, 4090 flow [2024-06-21 17:16:20,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:16:20,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:16:20,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:16:20,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 17:16:20,756 INFO L175 Difference]: Start difference. First operand has 277 places, 330 transitions, 3316 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:16:20,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 355 transitions, 4090 flow [2024-06-21 17:16:21,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 355 transitions, 3980 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 17:16:21,723 INFO L231 Difference]: Finished difference. Result has 278 places, 330 transitions, 3326 flow [2024-06-21 17:16:21,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3206, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3326, PETRI_PLACES=278, PETRI_TRANSITIONS=330} [2024-06-21 17:16:21,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-21 17:16:21,724 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 330 transitions, 3326 flow [2024-06-21 17:16:21,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:21,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:21,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:21,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 17:16:21,725 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:21,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:21,725 INFO L85 PathProgramCache]: Analyzing trace with hash -42941291, now seen corresponding path program 8 times [2024-06-21 17:16:21,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:21,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118806362] [2024-06-21 17:16:21,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:21,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:24,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:24,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118806362] [2024-06-21 17:16:24,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118806362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:24,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:24,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:16:24,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194696975] [2024-06-21 17:16:24,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:24,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:16:24,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:24,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:16:24,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:16:24,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:16:24,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 330 transitions, 3326 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:24,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:24,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:16:24,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:25,895 INFO L124 PetriNetUnfolderBase]: 3304/5597 cut-off events. [2024-06-21 17:16:25,895 INFO L125 PetriNetUnfolderBase]: For 382449/382461 co-relation queries the response was YES. [2024-06-21 17:16:25,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34834 conditions, 5597 events. 3304/5597 cut-off events. For 382449/382461 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 37136 event pairs, 681 based on Foata normal form. 14/5611 useless extension candidates. Maximal degree in co-relation 34705. Up to 4924 conditions per place. [2024-06-21 17:16:25,963 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 268 selfloop transitions, 89 changer transitions 0/362 dead transitions. [2024-06-21 17:16:25,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 362 transitions, 4552 flow [2024-06-21 17:16:25,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:16:25,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:16:25,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 17:16:25,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 17:16:25,964 INFO L175 Difference]: Start difference. First operand has 278 places, 330 transitions, 3326 flow. Second operand 8 states and 138 transitions. [2024-06-21 17:16:25,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 362 transitions, 4552 flow [2024-06-21 17:16:26,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 362 transitions, 4438 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:16:26,916 INFO L231 Difference]: Finished difference. Result has 279 places, 336 transitions, 3492 flow [2024-06-21 17:16:26,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3212, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3492, PETRI_PLACES=279, PETRI_TRANSITIONS=336} [2024-06-21 17:16:26,917 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-21 17:16:26,917 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 336 transitions, 3492 flow [2024-06-21 17:16:26,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:26,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:26,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:26,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 17:16:26,918 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:26,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:26,918 INFO L85 PathProgramCache]: Analyzing trace with hash -250304123, now seen corresponding path program 9 times [2024-06-21 17:16:26,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:26,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654304840] [2024-06-21 17:16:26,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:26,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:29,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:29,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654304840] [2024-06-21 17:16:29,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654304840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:29,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:29,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:16:29,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476787961] [2024-06-21 17:16:29,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:29,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:16:29,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:29,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:16:29,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:16:29,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:16:29,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 336 transitions, 3492 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:29,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:29,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:16:29,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:31,198 INFO L124 PetriNetUnfolderBase]: 3314/5608 cut-off events. [2024-06-21 17:16:31,199 INFO L125 PetriNetUnfolderBase]: For 391287/391293 co-relation queries the response was YES. [2024-06-21 17:16:31,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35168 conditions, 5608 events. 3314/5608 cut-off events. For 391287/391293 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 37126 event pairs, 709 based on Foata normal form. 3/5610 useless extension candidates. Maximal degree in co-relation 35038. Up to 4848 conditions per place. [2024-06-21 17:16:31,261 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 249 selfloop transitions, 111 changer transitions 0/365 dead transitions. [2024-06-21 17:16:31,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 365 transitions, 4584 flow [2024-06-21 17:16:31,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:16:31,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:16:31,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:16:31,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 17:16:31,262 INFO L175 Difference]: Start difference. First operand has 279 places, 336 transitions, 3492 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:16:31,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 365 transitions, 4584 flow [2024-06-21 17:16:32,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 365 transitions, 4420 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 17:16:32,334 INFO L231 Difference]: Finished difference. Result has 283 places, 342 transitions, 3702 flow [2024-06-21 17:16:32,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3328, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3702, PETRI_PLACES=283, PETRI_TRANSITIONS=342} [2024-06-21 17:16:32,335 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-21 17:16:32,335 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 342 transitions, 3702 flow [2024-06-21 17:16:32,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:32,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:32,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:32,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 17:16:32,335 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:32,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:32,336 INFO L85 PathProgramCache]: Analyzing trace with hash -141668195, now seen corresponding path program 9 times [2024-06-21 17:16:32,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:32,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842080044] [2024-06-21 17:16:32,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:32,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:34,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:34,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:34,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842080044] [2024-06-21 17:16:34,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842080044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:34,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:34,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:16:34,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386367941] [2024-06-21 17:16:34,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:34,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:16:34,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:34,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:16:34,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:16:34,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:16:34,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 342 transitions, 3702 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:34,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:34,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:16:34,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:36,792 INFO L124 PetriNetUnfolderBase]: 3308/5607 cut-off events. [2024-06-21 17:16:36,793 INFO L125 PetriNetUnfolderBase]: For 394618/394630 co-relation queries the response was YES. [2024-06-21 17:16:36,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35437 conditions, 5607 events. 3308/5607 cut-off events. For 394618/394630 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 37240 event pairs, 683 based on Foata normal form. 14/5621 useless extension candidates. Maximal degree in co-relation 35306. Up to 4933 conditions per place. [2024-06-21 17:16:36,861 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 274 selfloop transitions, 88 changer transitions 0/367 dead transitions. [2024-06-21 17:16:36,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 367 transitions, 4672 flow [2024-06-21 17:16:36,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:16:36,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:16:36,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:16:36,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 17:16:36,862 INFO L175 Difference]: Start difference. First operand has 283 places, 342 transitions, 3702 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:16:36,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 367 transitions, 4672 flow [2024-06-21 17:16:38,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 367 transitions, 4513 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-21 17:16:38,047 INFO L231 Difference]: Finished difference. Result has 287 places, 342 transitions, 3725 flow [2024-06-21 17:16:38,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3543, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3725, PETRI_PLACES=287, PETRI_TRANSITIONS=342} [2024-06-21 17:16:38,048 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-21 17:16:38,048 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 342 transitions, 3725 flow [2024-06-21 17:16:38,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:38,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:38,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:38,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 17:16:38,049 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:38,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:38,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1881507363, now seen corresponding path program 10 times [2024-06-21 17:16:38,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:38,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632116194] [2024-06-21 17:16:38,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:38,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:40,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:40,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632116194] [2024-06-21 17:16:40,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632116194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:40,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:40,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:16:40,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063796706] [2024-06-21 17:16:40,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:40,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:16:40,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:40,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:16:40,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:16:40,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:16:40,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 342 transitions, 3725 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:40,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:40,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:16:40,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:42,291 INFO L124 PetriNetUnfolderBase]: 3318/5626 cut-off events. [2024-06-21 17:16:42,291 INFO L125 PetriNetUnfolderBase]: For 400313/400339 co-relation queries the response was YES. [2024-06-21 17:16:42,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35502 conditions, 5626 events. 3318/5626 cut-off events. For 400313/400339 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 37450 event pairs, 718 based on Foata normal form. 22/5648 useless extension candidates. Maximal degree in co-relation 35369. Up to 4943 conditions per place. [2024-06-21 17:16:42,359 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 268 selfloop transitions, 92 changer transitions 0/365 dead transitions. [2024-06-21 17:16:42,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 365 transitions, 4736 flow [2024-06-21 17:16:42,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:16:42,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:16:42,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:16:42,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 17:16:42,360 INFO L175 Difference]: Start difference. First operand has 287 places, 342 transitions, 3725 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:16:42,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 365 transitions, 4736 flow [2024-06-21 17:16:43,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 365 transitions, 4530 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 17:16:43,487 INFO L231 Difference]: Finished difference. Result has 288 places, 345 transitions, 3766 flow [2024-06-21 17:16:43,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3525, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3766, PETRI_PLACES=288, PETRI_TRANSITIONS=345} [2024-06-21 17:16:43,487 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-21 17:16:43,487 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 345 transitions, 3766 flow [2024-06-21 17:16:43,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:43,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:43,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:43,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 17:16:43,488 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:43,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:43,488 INFO L85 PathProgramCache]: Analyzing trace with hash 143761869, now seen corresponding path program 10 times [2024-06-21 17:16:43,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:43,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736596003] [2024-06-21 17:16:43,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:43,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:46,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:46,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736596003] [2024-06-21 17:16:46,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736596003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:46,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:46,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:16:46,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779837414] [2024-06-21 17:16:46,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:46,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:16:46,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:46,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:16:46,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:16:46,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:16:46,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 345 transitions, 3766 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:46,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:46,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:16:46,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:48,331 INFO L124 PetriNetUnfolderBase]: 3344/5655 cut-off events. [2024-06-21 17:16:48,332 INFO L125 PetriNetUnfolderBase]: For 417390/417410 co-relation queries the response was YES. [2024-06-21 17:16:48,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36100 conditions, 5655 events. 3344/5655 cut-off events. For 417390/417410 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 37536 event pairs, 733 based on Foata normal form. 11/5665 useless extension candidates. Maximal degree in co-relation 35966. Up to 4879 conditions per place. [2024-06-21 17:16:48,396 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 254 selfloop transitions, 111 changer transitions 0/370 dead transitions. [2024-06-21 17:16:48,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 370 transitions, 5054 flow [2024-06-21 17:16:48,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:16:48,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:16:48,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 17:16:48,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 17:16:48,398 INFO L175 Difference]: Start difference. First operand has 288 places, 345 transitions, 3766 flow. Second operand 8 states and 134 transitions. [2024-06-21 17:16:48,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 370 transitions, 5054 flow [2024-06-21 17:16:49,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 370 transitions, 4755 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 17:16:49,374 INFO L231 Difference]: Finished difference. Result has 289 places, 351 transitions, 3847 flow [2024-06-21 17:16:49,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3467, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3847, PETRI_PLACES=289, PETRI_TRANSITIONS=351} [2024-06-21 17:16:49,374 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-21 17:16:49,375 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 351 transitions, 3847 flow [2024-06-21 17:16:49,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:49,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:49,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:49,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 17:16:49,375 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:49,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:49,376 INFO L85 PathProgramCache]: Analyzing trace with hash 805150263, now seen corresponding path program 11 times [2024-06-21 17:16:49,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:49,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036535288] [2024-06-21 17:16:49,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:49,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:52,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:52,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036535288] [2024-06-21 17:16:52,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036535288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:52,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:52,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:16:52,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945747506] [2024-06-21 17:16:52,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:52,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:16:52,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:52,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:16:52,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:16:52,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:16:52,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 351 transitions, 3847 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:52,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:52,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:16:52,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:54,082 INFO L124 PetriNetUnfolderBase]: 3354/5680 cut-off events. [2024-06-21 17:16:54,082 INFO L125 PetriNetUnfolderBase]: For 425703/425729 co-relation queries the response was YES. [2024-06-21 17:16:54,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36221 conditions, 5680 events. 3354/5680 cut-off events. For 425703/425729 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 37770 event pairs, 716 based on Foata normal form. 22/5702 useless extension candidates. Maximal degree in co-relation 36086. Up to 4989 conditions per place. [2024-06-21 17:16:54,150 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 275 selfloop transitions, 94 changer transitions 0/374 dead transitions. [2024-06-21 17:16:54,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 374 transitions, 4863 flow [2024-06-21 17:16:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:16:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:16:54,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:16:54,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 17:16:54,152 INFO L175 Difference]: Start difference. First operand has 289 places, 351 transitions, 3847 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:16:54,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 374 transitions, 4863 flow [2024-06-21 17:16:55,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 374 transitions, 4483 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-21 17:16:55,350 INFO L231 Difference]: Finished difference. Result has 292 places, 354 transitions, 3701 flow [2024-06-21 17:16:55,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3467, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3701, PETRI_PLACES=292, PETRI_TRANSITIONS=354} [2024-06-21 17:16:55,351 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-21 17:16:55,351 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 354 transitions, 3701 flow [2024-06-21 17:16:55,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:55,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:55,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:55,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 17:16:55,352 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:55,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:55,352 INFO L85 PathProgramCache]: Analyzing trace with hash 805030107, now seen corresponding path program 11 times [2024-06-21 17:16:55,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:55,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998904498] [2024-06-21 17:16:55,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:55,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:58,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:58,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998904498] [2024-06-21 17:16:58,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998904498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:58,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:58,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:16:58,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145790638] [2024-06-21 17:16:58,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:58,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:16:58,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:58,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:16:58,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:16:58,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:16:58,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 354 transitions, 3701 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:58,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:58,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:16:58,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:00,050 INFO L124 PetriNetUnfolderBase]: 3348/5660 cut-off events. [2024-06-21 17:17:00,050 INFO L125 PetriNetUnfolderBase]: For 423463/423469 co-relation queries the response was YES. [2024-06-21 17:17:00,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35536 conditions, 5660 events. 3348/5660 cut-off events. For 423463/423469 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 37513 event pairs, 701 based on Foata normal form. 3/5662 useless extension candidates. Maximal degree in co-relation 35401. Up to 5150 conditions per place. [2024-06-21 17:17:00,116 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 318 selfloop transitions, 48 changer transitions 0/371 dead transitions. [2024-06-21 17:17:00,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 371 transitions, 4475 flow [2024-06-21 17:17:00,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:17:00,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:17:00,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 17:17:00,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-21 17:17:00,117 INFO L175 Difference]: Start difference. First operand has 292 places, 354 transitions, 3701 flow. Second operand 8 states and 127 transitions. [2024-06-21 17:17:00,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 371 transitions, 4475 flow [2024-06-21 17:17:01,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 371 transitions, 4249 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 17:17:01,298 INFO L231 Difference]: Finished difference. Result has 295 places, 354 transitions, 3577 flow [2024-06-21 17:17:01,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3475, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3577, PETRI_PLACES=295, PETRI_TRANSITIONS=354} [2024-06-21 17:17:01,299 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-21 17:17:01,299 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 354 transitions, 3577 flow [2024-06-21 17:17:01,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:01,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:01,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:01,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 17:17:01,301 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:01,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:01,302 INFO L85 PathProgramCache]: Analyzing trace with hash 359115061, now seen corresponding path program 12 times [2024-06-21 17:17:01,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:01,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315706112] [2024-06-21 17:17:01,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:01,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:03,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:03,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315706112] [2024-06-21 17:17:03,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315706112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:03,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:03,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:17:03,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116764307] [2024-06-21 17:17:03,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:03,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:17:03,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:03,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:17:03,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:17:03,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:17:03,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 354 transitions, 3577 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:03,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:03,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:17:03,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:05,532 INFO L124 PetriNetUnfolderBase]: 3342/5653 cut-off events. [2024-06-21 17:17:05,533 INFO L125 PetriNetUnfolderBase]: For 423607/423627 co-relation queries the response was YES. [2024-06-21 17:17:05,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35152 conditions, 5653 events. 3342/5653 cut-off events. For 423607/423627 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 37546 event pairs, 727 based on Foata normal form. 11/5663 useless extension candidates. Maximal degree in co-relation 35016. Up to 4883 conditions per place. [2024-06-21 17:17:05,604 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 249 selfloop transitions, 117 changer transitions 0/371 dead transitions. [2024-06-21 17:17:05,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 371 transitions, 4351 flow [2024-06-21 17:17:05,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:17:05,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:17:05,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 17:17:05,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 17:17:05,605 INFO L175 Difference]: Start difference. First operand has 295 places, 354 transitions, 3577 flow. Second operand 8 states and 131 transitions. [2024-06-21 17:17:05,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 371 transitions, 4351 flow [2024-06-21 17:17:06,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 371 transitions, 4139 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-21 17:17:06,756 INFO L231 Difference]: Finished difference. Result has 293 places, 354 transitions, 3605 flow [2024-06-21 17:17:06,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3365, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3605, PETRI_PLACES=293, PETRI_TRANSITIONS=354} [2024-06-21 17:17:06,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-21 17:17:06,757 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 354 transitions, 3605 flow [2024-06-21 17:17:06,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:06,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:06,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:06,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 17:17:06,757 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:06,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:06,758 INFO L85 PathProgramCache]: Analyzing trace with hash 359115247, now seen corresponding path program 12 times [2024-06-21 17:17:06,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:06,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288105558] [2024-06-21 17:17:06,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:06,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:09,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:09,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288105558] [2024-06-21 17:17:09,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288105558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:09,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:09,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:17:09,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878233724] [2024-06-21 17:17:09,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:09,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:17:09,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:09,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:17:09,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:17:09,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:17:09,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 354 transitions, 3605 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:09,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:09,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:17:09,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:11,274 INFO L124 PetriNetUnfolderBase]: 3336/5656 cut-off events. [2024-06-21 17:17:11,274 INFO L125 PetriNetUnfolderBase]: For 422722/422748 co-relation queries the response was YES. [2024-06-21 17:17:11,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35106 conditions, 5656 events. 3336/5656 cut-off events. For 422722/422748 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 37649 event pairs, 718 based on Foata normal form. 22/5678 useless extension candidates. Maximal degree in co-relation 34971. Up to 4968 conditions per place. [2024-06-21 17:17:11,340 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 275 selfloop transitions, 93 changer transitions 0/373 dead transitions. [2024-06-21 17:17:11,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 373 transitions, 4395 flow [2024-06-21 17:17:11,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:17:11,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:17:11,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:17:11,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 17:17:11,341 INFO L175 Difference]: Start difference. First operand has 293 places, 354 transitions, 3605 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:17:11,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 373 transitions, 4395 flow [2024-06-21 17:17:12,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 373 transitions, 4060 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 17:17:12,537 INFO L231 Difference]: Finished difference. Result has 293 places, 354 transitions, 3462 flow [2024-06-21 17:17:12,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3270, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3462, PETRI_PLACES=293, PETRI_TRANSITIONS=354} [2024-06-21 17:17:12,538 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-21 17:17:12,538 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 354 transitions, 3462 flow [2024-06-21 17:17:12,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:12,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:12,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:12,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 17:17:12,539 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:12,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:12,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1632917227, now seen corresponding path program 1 times [2024-06-21 17:17:12,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:12,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707237817] [2024-06-21 17:17:12,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:12,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:15,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:15,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707237817] [2024-06-21 17:17:15,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707237817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:15,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:15,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:17:15,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975128278] [2024-06-21 17:17:15,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:15,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:17:15,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:15,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:17:15,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:17:15,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:17:15,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 354 transitions, 3462 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:15,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:15,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:17:15,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:17,426 INFO L124 PetriNetUnfolderBase]: 3344/5655 cut-off events. [2024-06-21 17:17:17,426 INFO L125 PetriNetUnfolderBase]: For 430315/430317 co-relation queries the response was YES. [2024-06-21 17:17:17,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35082 conditions, 5655 events. 3344/5655 cut-off events. For 430315/430317 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 37598 event pairs, 713 based on Foata normal form. 2/5657 useless extension candidates. Maximal degree in co-relation 34946. Up to 5219 conditions per place. [2024-06-21 17:17:17,498 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 348 selfloop transitions, 29 changer transitions 0/382 dead transitions. [2024-06-21 17:17:17,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 382 transitions, 4326 flow [2024-06-21 17:17:17,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:17:17,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:17:17,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 17:17:17,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 17:17:17,500 INFO L175 Difference]: Start difference. First operand has 293 places, 354 transitions, 3462 flow. Second operand 8 states and 134 transitions. [2024-06-21 17:17:17,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 382 transitions, 4326 flow [2024-06-21 17:17:18,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 382 transitions, 4100 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 17:17:18,815 INFO L231 Difference]: Finished difference. Result has 293 places, 356 transitions, 3345 flow [2024-06-21 17:17:18,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3236, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3345, PETRI_PLACES=293, PETRI_TRANSITIONS=356} [2024-06-21 17:17:18,816 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-21 17:17:18,816 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 356 transitions, 3345 flow [2024-06-21 17:17:18,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:18,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:18,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:18,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 17:17:18,817 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:18,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:18,817 INFO L85 PathProgramCache]: Analyzing trace with hash -249850097, now seen corresponding path program 2 times [2024-06-21 17:17:18,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:18,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79239113] [2024-06-21 17:17:18,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:18,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:21,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:21,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79239113] [2024-06-21 17:17:21,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79239113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:21,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:21,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:17:21,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849320284] [2024-06-21 17:17:21,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:21,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:17:21,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:21,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:17:21,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:17:22,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:17:22,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 356 transitions, 3345 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:22,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:22,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:17:22,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:24,033 INFO L124 PetriNetUnfolderBase]: 3352/5667 cut-off events. [2024-06-21 17:17:24,033 INFO L125 PetriNetUnfolderBase]: For 439996/439998 co-relation queries the response was YES. [2024-06-21 17:17:24,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35245 conditions, 5667 events. 3352/5667 cut-off events. For 439996/439998 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 37580 event pairs, 715 based on Foata normal form. 2/5669 useless extension candidates. Maximal degree in co-relation 35108. Up to 5231 conditions per place. [2024-06-21 17:17:24,093 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 347 selfloop transitions, 28 changer transitions 0/380 dead transitions. [2024-06-21 17:17:24,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 380 transitions, 4197 flow [2024-06-21 17:17:24,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:17:24,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:17:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 17:17:24,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 17:17:24,095 INFO L175 Difference]: Start difference. First operand has 293 places, 356 transitions, 3345 flow. Second operand 8 states and 131 transitions. [2024-06-21 17:17:24,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 380 transitions, 4197 flow [2024-06-21 17:17:25,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 380 transitions, 4104 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 17:17:25,371 INFO L231 Difference]: Finished difference. Result has 295 places, 358 transitions, 3363 flow [2024-06-21 17:17:25,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3252, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3363, PETRI_PLACES=295, PETRI_TRANSITIONS=358} [2024-06-21 17:17:25,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-21 17:17:25,372 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 358 transitions, 3363 flow [2024-06-21 17:17:25,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:25,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:25,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:25,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 17:17:25,372 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:25,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:25,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1884575469, now seen corresponding path program 3 times [2024-06-21 17:17:25,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:25,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320423432] [2024-06-21 17:17:25,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:25,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:28,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:28,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320423432] [2024-06-21 17:17:28,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320423432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:28,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:28,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:17:28,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651456026] [2024-06-21 17:17:28,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:28,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:17:28,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:28,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:17:28,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:17:28,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:17:28,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 358 transitions, 3363 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:28,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:28,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:17:28,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:29,760 INFO L124 PetriNetUnfolderBase]: 3360/5679 cut-off events. [2024-06-21 17:17:29,760 INFO L125 PetriNetUnfolderBase]: For 450064/450066 co-relation queries the response was YES. [2024-06-21 17:17:29,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35578 conditions, 5679 events. 3360/5679 cut-off events. For 450064/450066 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 37643 event pairs, 715 based on Foata normal form. 2/5681 useless extension candidates. Maximal degree in co-relation 35440. Up to 5223 conditions per place. [2024-06-21 17:17:29,829 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 344 selfloop transitions, 33 changer transitions 0/382 dead transitions. [2024-06-21 17:17:29,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 382 transitions, 4223 flow [2024-06-21 17:17:29,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:17:29,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:17:29,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 17:17:29,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 17:17:29,830 INFO L175 Difference]: Start difference. First operand has 295 places, 358 transitions, 3363 flow. Second operand 8 states and 131 transitions. [2024-06-21 17:17:29,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 382 transitions, 4223 flow [2024-06-21 17:17:31,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 382 transitions, 4128 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 17:17:31,343 INFO L231 Difference]: Finished difference. Result has 297 places, 360 transitions, 3393 flow [2024-06-21 17:17:31,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3268, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3393, PETRI_PLACES=297, PETRI_TRANSITIONS=360} [2024-06-21 17:17:31,343 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-21 17:17:31,343 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 360 transitions, 3393 flow [2024-06-21 17:17:31,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:31,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:31,344 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] [2024-06-21 17:17:31,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 17:17:31,344 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:31,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:31,345 INFO L85 PathProgramCache]: Analyzing trace with hash -349841213, now seen corresponding path program 4 times [2024-06-21 17:17:31,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:31,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415731462] [2024-06-21 17:17:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:31,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:34,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:34,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415731462] [2024-06-21 17:17:34,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415731462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:34,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:34,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:17:34,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922892540] [2024-06-21 17:17:34,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:34,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:17:34,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:34,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:17:34,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:17:34,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:17:34,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 360 transitions, 3393 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:34,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:34,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:17:34,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:36,163 INFO L124 PetriNetUnfolderBase]: 3368/5697 cut-off events. [2024-06-21 17:17:36,163 INFO L125 PetriNetUnfolderBase]: For 460461/460465 co-relation queries the response was YES. [2024-06-21 17:17:36,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35945 conditions, 5697 events. 3368/5697 cut-off events. For 460461/460465 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 37843 event pairs, 723 based on Foata normal form. 4/5701 useless extension candidates. Maximal degree in co-relation 35806. Up to 5255 conditions per place. [2024-06-21 17:17:36,238 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 346 selfloop transitions, 28 changer transitions 0/379 dead transitions. [2024-06-21 17:17:36,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 379 transitions, 4237 flow [2024-06-21 17:17:36,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:17:36,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:17:36,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 17:17:36,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 17:17:36,240 INFO L175 Difference]: Start difference. First operand has 297 places, 360 transitions, 3393 flow. Second operand 8 states and 126 transitions. [2024-06-21 17:17:36,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 379 transitions, 4237 flow [2024-06-21 17:17:37,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 379 transitions, 4128 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 17:17:37,507 INFO L231 Difference]: Finished difference. Result has 299 places, 362 transitions, 3403 flow [2024-06-21 17:17:37,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3284, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3403, PETRI_PLACES=299, PETRI_TRANSITIONS=362} [2024-06-21 17:17:37,507 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-21 17:17:37,507 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 362 transitions, 3403 flow [2024-06-21 17:17:37,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:37,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:37,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:37,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 17:17:37,508 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:37,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:37,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1011690987, now seen corresponding path program 5 times [2024-06-21 17:17:37,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:37,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717203154] [2024-06-21 17:17:37,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:37,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:37,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:40,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:40,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717203154] [2024-06-21 17:17:40,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717203154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:40,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:40,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:17:40,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900775837] [2024-06-21 17:17:40,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:40,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:17:40,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:40,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:17:40,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:17:40,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:17:40,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 362 transitions, 3403 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:40,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:40,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:17:40,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:42,453 INFO L124 PetriNetUnfolderBase]: 3376/5709 cut-off events. [2024-06-21 17:17:42,453 INFO L125 PetriNetUnfolderBase]: For 470942/470946 co-relation queries the response was YES. [2024-06-21 17:17:42,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36264 conditions, 5709 events. 3376/5709 cut-off events. For 470942/470946 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 37921 event pairs, 723 based on Foata normal form. 4/5713 useless extension candidates. Maximal degree in co-relation 36124. Up to 5253 conditions per place. [2024-06-21 17:17:42,526 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 345 selfloop transitions, 31 changer transitions 0/381 dead transitions. [2024-06-21 17:17:42,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 381 transitions, 4255 flow [2024-06-21 17:17:42,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:17:42,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:17:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 17:17:42,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-21 17:17:42,527 INFO L175 Difference]: Start difference. First operand has 299 places, 362 transitions, 3403 flow. Second operand 8 states and 127 transitions. [2024-06-21 17:17:42,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 381 transitions, 4255 flow [2024-06-21 17:17:43,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 381 transitions, 4152 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 17:17:43,878 INFO L231 Difference]: Finished difference. Result has 301 places, 364 transitions, 3429 flow [2024-06-21 17:17:43,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3300, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3429, PETRI_PLACES=301, PETRI_TRANSITIONS=364} [2024-06-21 17:17:43,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-21 17:17:43,879 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 364 transitions, 3429 flow [2024-06-21 17:17:43,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:43,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:43,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:43,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 17:17:43,879 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:43,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:43,880 INFO L85 PathProgramCache]: Analyzing trace with hash 625273807, now seen corresponding path program 6 times [2024-06-21 17:17:43,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:43,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674261255] [2024-06-21 17:17:43,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:43,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:43,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:46,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:46,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674261255] [2024-06-21 17:17:46,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674261255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:46,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:46,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:17:46,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981457328] [2024-06-21 17:17:46,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:46,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:17:46,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:46,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:17:46,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:17:46,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:17:46,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 364 transitions, 3429 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:46,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:46,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:17:46,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:48,609 INFO L124 PetriNetUnfolderBase]: 3371/5702 cut-off events. [2024-06-21 17:17:48,609 INFO L125 PetriNetUnfolderBase]: For 471077/471081 co-relation queries the response was YES. [2024-06-21 17:17:48,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36205 conditions, 5702 events. 3371/5702 cut-off events. For 471077/471081 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 37871 event pairs, 716 based on Foata normal form. 4/5706 useless extension candidates. Maximal degree in co-relation 36064. Up to 5198 conditions per place. [2024-06-21 17:17:48,674 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 336 selfloop transitions, 42 changer transitions 0/383 dead transitions. [2024-06-21 17:17:48,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 383 transitions, 4289 flow [2024-06-21 17:17:48,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:17:48,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:17:48,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 17:17:48,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 17:17:48,675 INFO L175 Difference]: Start difference. First operand has 301 places, 364 transitions, 3429 flow. Second operand 8 states and 126 transitions. [2024-06-21 17:17:48,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 383 transitions, 4289 flow [2024-06-21 17:17:50,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 383 transitions, 4176 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 17:17:50,204 INFO L231 Difference]: Finished difference. Result has 303 places, 366 transitions, 3471 flow [2024-06-21 17:17:50,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3316, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3471, PETRI_PLACES=303, PETRI_TRANSITIONS=366} [2024-06-21 17:17:50,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-21 17:17:50,205 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 366 transitions, 3471 flow [2024-06-21 17:17:50,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:50,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:50,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:50,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 17:17:50,205 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:50,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:50,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1949484874, now seen corresponding path program 1 times [2024-06-21 17:17:50,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:50,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487499503] [2024-06-21 17:17:50,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:50,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:53,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:53,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487499503] [2024-06-21 17:17:53,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487499503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:53,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:53,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:17:53,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102244382] [2024-06-21 17:17:53,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:53,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:17:53,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:53,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:17:53,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:17:53,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:17:53,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 366 transitions, 3471 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:53,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:53,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:17:53,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:55,440 INFO L124 PetriNetUnfolderBase]: 3397/5738 cut-off events. [2024-06-21 17:17:55,440 INFO L125 PetriNetUnfolderBase]: For 491832/491840 co-relation queries the response was YES. [2024-06-21 17:17:55,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36959 conditions, 5738 events. 3397/5738 cut-off events. For 491832/491840 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 38110 event pairs, 717 based on Foata normal form. 10/5748 useless extension candidates. Maximal degree in co-relation 36817. Up to 5123 conditions per place. [2024-06-21 17:17:55,502 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 342 selfloop transitions, 72 changer transitions 0/419 dead transitions. [2024-06-21 17:17:55,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 419 transitions, 4773 flow [2024-06-21 17:17:55,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:17:55,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:17:55,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-21 17:17:55,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 17:17:55,503 INFO L175 Difference]: Start difference. First operand has 303 places, 366 transitions, 3471 flow. Second operand 11 states and 187 transitions. [2024-06-21 17:17:55,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 419 transitions, 4773 flow [2024-06-21 17:17:57,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 419 transitions, 4634 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 17:17:57,034 INFO L231 Difference]: Finished difference. Result has 309 places, 373 transitions, 3648 flow [2024-06-21 17:17:57,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3332, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3648, PETRI_PLACES=309, PETRI_TRANSITIONS=373} [2024-06-21 17:17:57,035 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-21 17:17:57,035 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 373 transitions, 3648 flow [2024-06-21 17:17:57,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:57,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:57,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:57,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 17:17:57,036 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:57,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:57,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1949490454, now seen corresponding path program 2 times [2024-06-21 17:17:57,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:57,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906003102] [2024-06-21 17:17:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:57,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:00,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:00,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906003102] [2024-06-21 17:18:00,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906003102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:00,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:00,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:18:00,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305422239] [2024-06-21 17:18:00,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:00,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:18:00,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:00,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:18:00,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:18:00,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:18:00,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 373 transitions, 3648 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:00,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:00,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:18:00,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:02,342 INFO L124 PetriNetUnfolderBase]: 3407/5752 cut-off events. [2024-06-21 17:18:02,343 INFO L125 PetriNetUnfolderBase]: For 504578/504586 co-relation queries the response was YES. [2024-06-21 17:18:02,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37722 conditions, 5752 events. 3407/5752 cut-off events. For 504578/504586 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 38181 event pairs, 717 based on Foata normal form. 10/5762 useless extension candidates. Maximal degree in co-relation 37578. Up to 5133 conditions per place. [2024-06-21 17:18:02,540 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 343 selfloop transitions, 70 changer transitions 0/418 dead transitions. [2024-06-21 17:18:02,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 418 transitions, 4871 flow [2024-06-21 17:18:02,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:18:02,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:18:02,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-21 17:18:02,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39826839826839827 [2024-06-21 17:18:02,542 INFO L175 Difference]: Start difference. First operand has 309 places, 373 transitions, 3648 flow. Second operand 11 states and 184 transitions. [2024-06-21 17:18:02,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 418 transitions, 4871 flow [2024-06-21 17:18:04,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 418 transitions, 4661 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-21 17:18:04,128 INFO L231 Difference]: Finished difference. Result has 313 places, 376 transitions, 3662 flow [2024-06-21 17:18:04,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3470, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3662, PETRI_PLACES=313, PETRI_TRANSITIONS=376} [2024-06-21 17:18:04,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-21 17:18:04,129 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 376 transitions, 3662 flow [2024-06-21 17:18:04,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:04,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:04,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:04,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 17:18:04,129 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:04,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:04,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1750271278, now seen corresponding path program 3 times [2024-06-21 17:18:04,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:04,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233662773] [2024-06-21 17:18:04,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:04,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:07,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:07,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:07,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233662773] [2024-06-21 17:18:07,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233662773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:07,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:07,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:18:07,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35227438] [2024-06-21 17:18:07,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:07,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:18:07,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:07,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:18:07,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:18:07,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:18:07,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 376 transitions, 3662 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:07,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:07,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:18:07,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:09,769 INFO L124 PetriNetUnfolderBase]: 3417/5766 cut-off events. [2024-06-21 17:18:09,770 INFO L125 PetriNetUnfolderBase]: For 512921/512929 co-relation queries the response was YES. [2024-06-21 17:18:09,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37901 conditions, 5766 events. 3417/5766 cut-off events. For 512921/512929 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 38308 event pairs, 719 based on Foata normal form. 10/5776 useless extension candidates. Maximal degree in co-relation 37755. Up to 5143 conditions per place. [2024-06-21 17:18:09,836 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 347 selfloop transitions, 73 changer transitions 0/425 dead transitions. [2024-06-21 17:18:09,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 425 transitions, 4883 flow [2024-06-21 17:18:09,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:18:09,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:18:09,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 210 transitions. [2024-06-21 17:18:09,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-06-21 17:18:09,838 INFO L175 Difference]: Start difference. First operand has 313 places, 376 transitions, 3662 flow. Second operand 13 states and 210 transitions. [2024-06-21 17:18:09,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 425 transitions, 4883 flow [2024-06-21 17:18:11,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 425 transitions, 4740 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 17:18:11,758 INFO L231 Difference]: Finished difference. Result has 318 places, 379 transitions, 3723 flow [2024-06-21 17:18:11,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3522, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3723, PETRI_PLACES=318, PETRI_TRANSITIONS=379} [2024-06-21 17:18:11,759 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-21 17:18:11,759 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 379 transitions, 3723 flow [2024-06-21 17:18:11,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:11,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:11,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:11,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 17:18:11,760 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:11,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:11,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1617457048, now seen corresponding path program 4 times [2024-06-21 17:18:11,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:11,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834829886] [2024-06-21 17:18:11,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:11,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:14,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:14,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:14,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834829886] [2024-06-21 17:18:14,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834829886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:14,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:14,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:18:14,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942845693] [2024-06-21 17:18:14,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:14,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:18:14,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:14,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:18:14,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:18:14,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:18:14,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 379 transitions, 3723 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:14,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:14,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:18:14,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:17,289 INFO L124 PetriNetUnfolderBase]: 3533/5928 cut-off events. [2024-06-21 17:18:17,289 INFO L125 PetriNetUnfolderBase]: For 602789/602791 co-relation queries the response was YES. [2024-06-21 17:18:17,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40660 conditions, 5928 events. 3533/5928 cut-off events. For 602789/602791 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 39262 event pairs, 742 based on Foata normal form. 4/5931 useless extension candidates. Maximal degree in co-relation 40513. Up to 4741 conditions per place. [2024-06-21 17:18:17,357 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 257 selfloop transitions, 182 changer transitions 0/444 dead transitions. [2024-06-21 17:18:17,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 444 transitions, 5967 flow [2024-06-21 17:18:17,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:18:17,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:18:17,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 231 transitions. [2024-06-21 17:18:17,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-06-21 17:18:17,359 INFO L175 Difference]: Start difference. First operand has 318 places, 379 transitions, 3723 flow. Second operand 13 states and 231 transitions. [2024-06-21 17:18:17,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 444 transitions, 5967 flow [2024-06-21 17:18:19,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 444 transitions, 5786 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-06-21 17:18:19,117 INFO L231 Difference]: Finished difference. Result has 320 places, 397 transitions, 4328 flow [2024-06-21 17:18:19,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3542, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4328, PETRI_PLACES=320, PETRI_TRANSITIONS=397} [2024-06-21 17:18:19,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-21 17:18:19,118 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 397 transitions, 4328 flow [2024-06-21 17:18:19,118 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) [2024-06-21 17:18:19,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:19,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:19,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 17:18:19,118 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:19,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:19,119 INFO L85 PathProgramCache]: Analyzing trace with hash -742559986, now seen corresponding path program 5 times [2024-06-21 17:18:19,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:19,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163333296] [2024-06-21 17:18:19,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:19,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:22,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:22,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163333296] [2024-06-21 17:18:22,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163333296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:22,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:22,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:18:22,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994275521] [2024-06-21 17:18:22,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:22,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:18:22,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:22,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:18:22,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:18:22,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:18:22,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 397 transitions, 4328 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:22,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:22,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:18:22,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:24,394 INFO L124 PetriNetUnfolderBase]: 3575/5992 cut-off events. [2024-06-21 17:18:24,394 INFO L125 PetriNetUnfolderBase]: For 632826/632828 co-relation queries the response was YES. [2024-06-21 17:18:24,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42858 conditions, 5992 events. 3575/5992 cut-off events. For 632826/632828 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 39665 event pairs, 742 based on Foata normal form. 2/5993 useless extension candidates. Maximal degree in co-relation 42710. Up to 4781 conditions per place. [2024-06-21 17:18:24,475 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 254 selfloop transitions, 186 changer transitions 0/445 dead transitions. [2024-06-21 17:18:24,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 445 transitions, 6330 flow [2024-06-21 17:18:24,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:18:24,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:18:24,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 215 transitions. [2024-06-21 17:18:24,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42658730158730157 [2024-06-21 17:18:24,477 INFO L175 Difference]: Start difference. First operand has 320 places, 397 transitions, 4328 flow. Second operand 12 states and 215 transitions. [2024-06-21 17:18:24,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 445 transitions, 6330 flow [2024-06-21 17:18:26,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 445 transitions, 5886 flow, removed 157 selfloop flow, removed 9 redundant places. [2024-06-21 17:18:26,754 INFO L231 Difference]: Finished difference. Result has 323 places, 404 transitions, 4440 flow [2024-06-21 17:18:26,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3972, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4440, PETRI_PLACES=323, PETRI_TRANSITIONS=404} [2024-06-21 17:18:26,755 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-21 17:18:26,755 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 404 transitions, 4440 flow [2024-06-21 17:18:26,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:26,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:26,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:26,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 17:18:26,756 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:26,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:26,757 INFO L85 PathProgramCache]: Analyzing trace with hash -737347336, now seen corresponding path program 6 times [2024-06-21 17:18:26,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:26,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960833554] [2024-06-21 17:18:26,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:26,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:29,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:29,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960833554] [2024-06-21 17:18:29,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960833554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:29,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:29,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:18:29,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051792173] [2024-06-21 17:18:29,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:29,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:18:29,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:29,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:18:29,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:18:29,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:18:29,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 404 transitions, 4440 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:29,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:29,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:18:29,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:31,491 INFO L124 PetriNetUnfolderBase]: 3563/5976 cut-off events. [2024-06-21 17:18:31,491 INFO L125 PetriNetUnfolderBase]: For 618918/618920 co-relation queries the response was YES. [2024-06-21 17:18:31,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41237 conditions, 5976 events. 3563/5976 cut-off events. For 618918/618920 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 39564 event pairs, 738 based on Foata normal form. 4/5979 useless extension candidates. Maximal degree in co-relation 41090. Up to 4771 conditions per place. [2024-06-21 17:18:31,572 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 248 selfloop transitions, 197 changer transitions 0/450 dead transitions. [2024-06-21 17:18:31,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 450 transitions, 6091 flow [2024-06-21 17:18:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:18:31,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:18:31,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 227 transitions. [2024-06-21 17:18:31,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157509157509158 [2024-06-21 17:18:31,574 INFO L175 Difference]: Start difference. First operand has 323 places, 404 transitions, 4440 flow. Second operand 13 states and 227 transitions. [2024-06-21 17:18:31,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 450 transitions, 6091 flow [2024-06-21 17:18:33,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 450 transitions, 5698 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 17:18:33,841 INFO L231 Difference]: Finished difference. Result has 328 places, 404 transitions, 4449 flow [2024-06-21 17:18:33,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4047, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4449, PETRI_PLACES=328, PETRI_TRANSITIONS=404} [2024-06-21 17:18:33,841 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-21 17:18:33,842 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 404 transitions, 4449 flow [2024-06-21 17:18:33,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:33,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:33,842 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, 1] [2024-06-21 17:18:33,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 17:18:33,842 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:33,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:33,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1285319210, now seen corresponding path program 7 times [2024-06-21 17:18:33,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:33,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510846547] [2024-06-21 17:18:33,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:33,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:37,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:37,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510846547] [2024-06-21 17:18:37,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510846547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:37,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:37,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:18:37,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895465644] [2024-06-21 17:18:37,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:37,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:18:37,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:37,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:18:37,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:18:37,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:18:37,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 404 transitions, 4449 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:37,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:37,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:18:37,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:39,496 INFO L124 PetriNetUnfolderBase]: 3567/5986 cut-off events. [2024-06-21 17:18:39,496 INFO L125 PetriNetUnfolderBase]: For 618025/618027 co-relation queries the response was YES. [2024-06-21 17:18:39,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41162 conditions, 5986 events. 3567/5986 cut-off events. For 618025/618027 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 39712 event pairs, 738 based on Foata normal form. 4/5989 useless extension candidates. Maximal degree in co-relation 41014. Up to 4776 conditions per place. [2024-06-21 17:18:39,578 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 246 selfloop transitions, 196 changer transitions 0/447 dead transitions. [2024-06-21 17:18:39,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 447 transitions, 6128 flow [2024-06-21 17:18:39,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:18:39,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:18:39,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 210 transitions. [2024-06-21 17:18:39,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:18:39,579 INFO L175 Difference]: Start difference. First operand has 328 places, 404 transitions, 4449 flow. Second operand 12 states and 210 transitions. [2024-06-21 17:18:39,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 447 transitions, 6128 flow [2024-06-21 17:18:41,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 447 transitions, 5732 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-21 17:18:41,827 INFO L231 Difference]: Finished difference. Result has 329 places, 407 transitions, 4504 flow [2024-06-21 17:18:41,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4063, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4504, PETRI_PLACES=329, PETRI_TRANSITIONS=407} [2024-06-21 17:18:41,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-21 17:18:41,827 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 407 transitions, 4504 flow [2024-06-21 17:18:41,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:41,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:41,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:41,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 17:18:41,828 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:41,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:41,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1285318993, now seen corresponding path program 1 times [2024-06-21 17:18:41,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:41,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122971588] [2024-06-21 17:18:41,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:41,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:45,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:45,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122971588] [2024-06-21 17:18:45,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122971588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:45,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:45,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:18:45,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014162275] [2024-06-21 17:18:45,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:45,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:18:45,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:45,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:18:45,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:18:45,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:18:45,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 407 transitions, 4504 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:45,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:45,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:18:45,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:47,373 INFO L124 PetriNetUnfolderBase]: 3609/6045 cut-off events. [2024-06-21 17:18:47,373 INFO L125 PetriNetUnfolderBase]: For 641463/641471 co-relation queries the response was YES. [2024-06-21 17:18:47,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42174 conditions, 6045 events. 3609/6045 cut-off events. For 641463/641471 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 40092 event pairs, 757 based on Foata normal form. 10/6054 useless extension candidates. Maximal degree in co-relation 42025. Up to 5356 conditions per place. [2024-06-21 17:18:47,459 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 367 selfloop transitions, 85 changer transitions 0/457 dead transitions. [2024-06-21 17:18:47,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 457 transitions, 6150 flow [2024-06-21 17:18:47,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:18:47,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:18:47,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 202 transitions. [2024-06-21 17:18:47,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-21 17:18:47,461 INFO L175 Difference]: Start difference. First operand has 329 places, 407 transitions, 4504 flow. Second operand 12 states and 202 transitions. [2024-06-21 17:18:47,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 457 transitions, 6150 flow [2024-06-21 17:18:49,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 457 transitions, 5793 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 17:18:49,333 INFO L231 Difference]: Finished difference. Result has 333 places, 416 transitions, 4527 flow [2024-06-21 17:18:49,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4147, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4527, PETRI_PLACES=333, PETRI_TRANSITIONS=416} [2024-06-21 17:18:49,334 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-21 17:18:49,334 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 416 transitions, 4527 flow [2024-06-21 17:18:49,334 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) [2024-06-21 17:18:49,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:49,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:49,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 17:18:49,335 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:49,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:49,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1280670419, now seen corresponding path program 1 times [2024-06-21 17:18:49,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:49,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611019827] [2024-06-21 17:18:49,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:49,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:52,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:52,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611019827] [2024-06-21 17:18:52,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611019827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:52,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:52,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:18:52,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302687461] [2024-06-21 17:18:52,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:52,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:18:52,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:52,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:18:52,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:18:52,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:18:52,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 416 transitions, 4527 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:52,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:52,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:18:52,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:54,841 INFO L124 PetriNetUnfolderBase]: 3617/6063 cut-off events. [2024-06-21 17:18:54,841 INFO L125 PetriNetUnfolderBase]: For 655007/655017 co-relation queries the response was YES. [2024-06-21 17:18:54,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42338 conditions, 6063 events. 3617/6063 cut-off events. For 655007/655017 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 40314 event pairs, 756 based on Foata normal form. 12/6075 useless extension candidates. Maximal degree in co-relation 42188. Up to 5565 conditions per place. [2024-06-21 17:18:54,916 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 409 selfloop transitions, 36 changer transitions 0/450 dead transitions. [2024-06-21 17:18:54,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 450 transitions, 5559 flow [2024-06-21 17:18:54,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:18:54,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:18:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-21 17:18:54,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-21 17:18:54,918 INFO L175 Difference]: Start difference. First operand has 333 places, 416 transitions, 4527 flow. Second operand 10 states and 161 transitions. [2024-06-21 17:18:54,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 450 transitions, 5559 flow [2024-06-21 17:18:57,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 450 transitions, 5396 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-21 17:18:57,523 INFO L231 Difference]: Finished difference. Result has 336 places, 418 transitions, 4497 flow [2024-06-21 17:18:57,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4364, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4497, PETRI_PLACES=336, PETRI_TRANSITIONS=418} [2024-06-21 17:18:57,523 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-21 17:18:57,523 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 418 transitions, 4497 flow [2024-06-21 17:18:57,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:57,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:57,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:57,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 17:18:57,524 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:57,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:57,524 INFO L85 PathProgramCache]: Analyzing trace with hash -546197181, now seen corresponding path program 2 times [2024-06-21 17:18:57,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:57,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627843452] [2024-06-21 17:18:57,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:57,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:00,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:00,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:00,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627843452] [2024-06-21 17:19:00,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627843452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:00,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:00,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:19:00,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281239225] [2024-06-21 17:19:00,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:00,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:19:00,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:00,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:19:00,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:19:00,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:19:00,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 418 transitions, 4497 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:00,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:00,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:19:00,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:03,040 INFO L124 PetriNetUnfolderBase]: 3627/6075 cut-off events. [2024-06-21 17:19:03,041 INFO L125 PetriNetUnfolderBase]: For 665914/665922 co-relation queries the response was YES. [2024-06-21 17:19:03,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42543 conditions, 6075 events. 3627/6075 cut-off events. For 665914/665922 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 40324 event pairs, 759 based on Foata normal form. 10/6084 useless extension candidates. Maximal degree in co-relation 42391. Up to 5378 conditions per place. [2024-06-21 17:19:03,111 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 366 selfloop transitions, 86 changer transitions 0/457 dead transitions. [2024-06-21 17:19:03,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 457 transitions, 5987 flow [2024-06-21 17:19:03,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:19:03,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:19:03,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-21 17:19:03,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-21 17:19:03,113 INFO L175 Difference]: Start difference. First operand has 336 places, 418 transitions, 4497 flow. Second operand 11 states and 189 transitions. [2024-06-21 17:19:03,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 457 transitions, 5987 flow [2024-06-21 17:19:05,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 457 transitions, 5870 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 17:19:05,092 INFO L231 Difference]: Finished difference. Result has 339 places, 421 transitions, 4606 flow [2024-06-21 17:19:05,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4380, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4606, PETRI_PLACES=339, PETRI_TRANSITIONS=421} [2024-06-21 17:19:05,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-21 17:19:05,093 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 421 transitions, 4606 flow [2024-06-21 17:19:05,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:05,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:05,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:05,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 17:19:05,093 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:05,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:05,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1172852684, now seen corresponding path program 8 times [2024-06-21 17:19:05,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:05,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881535465] [2024-06-21 17:19:05,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:05,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:07,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:07,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881535465] [2024-06-21 17:19:07,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881535465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:07,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:07,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:19:07,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909791208] [2024-06-21 17:19:07,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:07,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:19:07,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:07,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:19:07,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:19:08,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:19:08,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 421 transitions, 4606 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:08,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:08,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:19:08,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:10,019 INFO L124 PetriNetUnfolderBase]: 3653/6118 cut-off events. [2024-06-21 17:19:10,019 INFO L125 PetriNetUnfolderBase]: For 690191/690193 co-relation queries the response was YES. [2024-06-21 17:19:10,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43189 conditions, 6118 events. 3653/6118 cut-off events. For 690191/690193 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 40666 event pairs, 746 based on Foata normal form. 2/6119 useless extension candidates. Maximal degree in co-relation 43036. Up to 4885 conditions per place. [2024-06-21 17:19:10,105 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 268 selfloop transitions, 190 changer transitions 0/463 dead transitions. [2024-06-21 17:19:10,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 463 transitions, 6591 flow [2024-06-21 17:19:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:19:10,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:19:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-21 17:19:10,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264069264069264 [2024-06-21 17:19:10,107 INFO L175 Difference]: Start difference. First operand has 339 places, 421 transitions, 4606 flow. Second operand 11 states and 197 transitions. [2024-06-21 17:19:10,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 463 transitions, 6591 flow [2024-06-21 17:19:12,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 463 transitions, 6396 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 17:19:12,308 INFO L231 Difference]: Finished difference. Result has 342 places, 427 transitions, 4888 flow [2024-06-21 17:19:12,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4411, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4888, PETRI_PLACES=342, PETRI_TRANSITIONS=427} [2024-06-21 17:19:12,308 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-21 17:19:12,309 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 427 transitions, 4888 flow [2024-06-21 17:19:12,309 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) [2024-06-21 17:19:12,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:12,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:12,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 17:19:12,309 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:12,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:12,309 INFO L85 PathProgramCache]: Analyzing trace with hash -732377416, now seen corresponding path program 9 times [2024-06-21 17:19:12,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:12,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944958971] [2024-06-21 17:19:12,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:12,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:15,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:15,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:15,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944958971] [2024-06-21 17:19:15,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944958971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:15,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:15,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:19:15,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691363330] [2024-06-21 17:19:15,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:15,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:19:15,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:15,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:19:15,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:19:15,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:19:15,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 427 transitions, 4888 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:15,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:15,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:19:15,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:17,834 INFO L124 PetriNetUnfolderBase]: 3647/6110 cut-off events. [2024-06-21 17:19:17,835 INFO L125 PetriNetUnfolderBase]: For 690634/690636 co-relation queries the response was YES. [2024-06-21 17:19:17,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43398 conditions, 6110 events. 3647/6110 cut-off events. For 690634/690636 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 40624 event pairs, 746 based on Foata normal form. 2/6111 useless extension candidates. Maximal degree in co-relation 43244. Up to 4880 conditions per place. [2024-06-21 17:19:17,920 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 266 selfloop transitions, 191 changer transitions 0/462 dead transitions. [2024-06-21 17:19:17,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 462 transitions, 6562 flow [2024-06-21 17:19:17,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:19:17,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:19:17,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-21 17:19:17,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42207792207792205 [2024-06-21 17:19:17,922 INFO L175 Difference]: Start difference. First operand has 342 places, 427 transitions, 4888 flow. Second operand 11 states and 195 transitions. [2024-06-21 17:19:17,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 462 transitions, 6562 flow [2024-06-21 17:19:20,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 462 transitions, 6180 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 17:19:20,177 INFO L231 Difference]: Finished difference. Result has 346 places, 427 transitions, 4894 flow [2024-06-21 17:19:20,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4506, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4894, PETRI_PLACES=346, PETRI_TRANSITIONS=427} [2024-06-21 17:19:20,178 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-21 17:19:20,178 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 427 transitions, 4894 flow [2024-06-21 17:19:20,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:20,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:20,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:20,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 17:19:20,179 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:20,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:20,179 INFO L85 PathProgramCache]: Analyzing trace with hash -936664583, now seen corresponding path program 2 times [2024-06-21 17:19:20,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:20,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939911476] [2024-06-21 17:19:20,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:20,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:23,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:23,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939911476] [2024-06-21 17:19:23,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939911476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:23,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:23,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:19:23,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995736378] [2024-06-21 17:19:23,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:23,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:19:23,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:23,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:19:23,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:19:23,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:19:23,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 427 transitions, 4894 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:23,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:23,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:19:23,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:25,868 INFO L124 PetriNetUnfolderBase]: 3655/6125 cut-off events. [2024-06-21 17:19:25,869 INFO L125 PetriNetUnfolderBase]: For 701851/701861 co-relation queries the response was YES. [2024-06-21 17:19:25,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43600 conditions, 6125 events. 3655/6125 cut-off events. For 701851/701861 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 40728 event pairs, 764 based on Foata normal form. 12/6137 useless extension candidates. Maximal degree in co-relation 43445. Up to 5619 conditions per place. [2024-06-21 17:19:25,965 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 415 selfloop transitions, 34 changer transitions 0/454 dead transitions. [2024-06-21 17:19:25,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 454 transitions, 5920 flow [2024-06-21 17:19:25,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:19:25,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:19:25,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:19:25,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 17:19:25,967 INFO L175 Difference]: Start difference. First operand has 346 places, 427 transitions, 4894 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:19:25,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 454 transitions, 5920 flow [2024-06-21 17:19:28,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 454 transitions, 5528 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-21 17:19:28,520 INFO L231 Difference]: Finished difference. Result has 344 places, 429 transitions, 4635 flow [2024-06-21 17:19:28,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4502, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4635, PETRI_PLACES=344, PETRI_TRANSITIONS=429} [2024-06-21 17:19:28,521 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-21 17:19:28,521 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 429 transitions, 4635 flow [2024-06-21 17:19:28,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:28,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:28,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:28,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 17:19:28,523 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:28,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:28,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1168639651, now seen corresponding path program 3 times [2024-06-21 17:19:28,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:28,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721801257] [2024-06-21 17:19:28,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:28,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:31,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:31,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721801257] [2024-06-21 17:19:31,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721801257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:31,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:31,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:19:31,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155810659] [2024-06-21 17:19:31,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:31,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:19:31,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:31,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:19:31,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:19:31,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:19:31,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 429 transitions, 4635 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:31,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:31,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:19:31,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:33,855 INFO L124 PetriNetUnfolderBase]: 3649/6109 cut-off events. [2024-06-21 17:19:33,855 INFO L125 PetriNetUnfolderBase]: For 699022/699030 co-relation queries the response was YES. [2024-06-21 17:19:33,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42890 conditions, 6109 events. 3649/6109 cut-off events. For 699022/699030 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 40587 event pairs, 767 based on Foata normal form. 10/6118 useless extension candidates. Maximal degree in co-relation 42734. Up to 5413 conditions per place. [2024-06-21 17:19:33,929 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 368 selfloop transitions, 84 changer transitions 0/457 dead transitions. [2024-06-21 17:19:33,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 457 transitions, 5845 flow [2024-06-21 17:19:33,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:19:33,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:19:33,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 17:19:33,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 17:19:33,931 INFO L175 Difference]: Start difference. First operand has 344 places, 429 transitions, 4635 flow. Second operand 9 states and 153 transitions. [2024-06-21 17:19:33,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 457 transitions, 5845 flow [2024-06-21 17:19:35,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 457 transitions, 5706 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 17:19:35,768 INFO L231 Difference]: Finished difference. Result has 347 places, 429 transitions, 4670 flow [2024-06-21 17:19:35,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4496, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4670, PETRI_PLACES=347, PETRI_TRANSITIONS=429} [2024-06-21 17:19:35,769 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-21 17:19:35,769 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 429 transitions, 4670 flow [2024-06-21 17:19:35,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:35,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:35,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:35,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 17:19:35,770 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:35,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:35,770 INFO L85 PathProgramCache]: Analyzing trace with hash -936367913, now seen corresponding path program 3 times [2024-06-21 17:19:35,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:35,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470401372] [2024-06-21 17:19:35,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:35,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:39,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:39,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470401372] [2024-06-21 17:19:39,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470401372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:39,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:39,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:19:39,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238810352] [2024-06-21 17:19:39,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:39,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:19:39,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:39,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:19:39,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:19:39,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:19:39,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 429 transitions, 4670 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:39,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:39,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:19:39,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:41,034 INFO L124 PetriNetUnfolderBase]: 3670/6146 cut-off events. [2024-06-21 17:19:41,034 INFO L125 PetriNetUnfolderBase]: For 724917/724927 co-relation queries the response was YES. [2024-06-21 17:19:41,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43620 conditions, 6146 events. 3670/6146 cut-off events. For 724917/724927 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 40898 event pairs, 762 based on Foata normal form. 12/6158 useless extension candidates. Maximal degree in co-relation 43463. Up to 5611 conditions per place. [2024-06-21 17:19:41,122 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 416 selfloop transitions, 39 changer transitions 0/460 dead transitions. [2024-06-21 17:19:41,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 460 transitions, 6018 flow [2024-06-21 17:19:41,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:19:41,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:19:41,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 17:19:41,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 17:19:41,124 INFO L175 Difference]: Start difference. First operand has 347 places, 429 transitions, 4670 flow. Second operand 8 states and 133 transitions. [2024-06-21 17:19:41,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 460 transitions, 6018 flow [2024-06-21 17:19:43,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 460 transitions, 5819 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 17:19:43,599 INFO L231 Difference]: Finished difference. Result has 347 places, 434 transitions, 4706 flow [2024-06-21 17:19:43,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4471, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4706, PETRI_PLACES=347, PETRI_TRANSITIONS=434} [2024-06-21 17:19:43,599 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-21 17:19:43,600 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 434 transitions, 4706 flow [2024-06-21 17:19:43,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:43,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:43,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:43,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 17:19:43,600 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:43,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:43,601 INFO L85 PathProgramCache]: Analyzing trace with hash -560037256, now seen corresponding path program 10 times [2024-06-21 17:19:43,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:43,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490113611] [2024-06-21 17:19:43,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:43,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:46,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:46,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490113611] [2024-06-21 17:19:46,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490113611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:46,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:46,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:19:46,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185930659] [2024-06-21 17:19:46,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:46,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:19:46,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:46,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:19:46,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:19:46,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:19:46,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 434 transitions, 4706 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:46,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:46,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:19:46,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:48,732 INFO L124 PetriNetUnfolderBase]: 3664/6146 cut-off events. [2024-06-21 17:19:48,733 INFO L125 PetriNetUnfolderBase]: For 724402/724404 co-relation queries the response was YES. [2024-06-21 17:19:48,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43403 conditions, 6146 events. 3664/6146 cut-off events. For 724402/724404 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 40967 event pairs, 762 based on Foata normal form. 2/6148 useless extension candidates. Maximal degree in co-relation 43244. Up to 5600 conditions per place. [2024-06-21 17:19:48,817 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 406 selfloop transitions, 48 changer transitions 0/459 dead transitions. [2024-06-21 17:19:48,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 459 transitions, 5678 flow [2024-06-21 17:19:48,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:19:48,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:19:48,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 17:19:48,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 17:19:48,819 INFO L175 Difference]: Start difference. First operand has 347 places, 434 transitions, 4706 flow. Second operand 9 states and 145 transitions. [2024-06-21 17:19:48,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 459 transitions, 5678 flow [2024-06-21 17:19:51,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 459 transitions, 5535 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-21 17:19:51,262 INFO L231 Difference]: Finished difference. Result has 352 places, 434 transitions, 4666 flow [2024-06-21 17:19:51,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4563, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4666, PETRI_PLACES=352, PETRI_TRANSITIONS=434} [2024-06-21 17:19:51,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-21 17:19:51,263 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 434 transitions, 4666 flow [2024-06-21 17:19:51,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:51,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:51,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:51,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 17:19:51,264 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:51,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:51,264 INFO L85 PathProgramCache]: Analyzing trace with hash -944951534, now seen corresponding path program 11 times [2024-06-21 17:19:51,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:51,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258363928] [2024-06-21 17:19:51,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:51,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:54,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:54,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258363928] [2024-06-21 17:19:54,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258363928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:54,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:54,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:19:54,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568622224] [2024-06-21 17:19:54,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:54,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:19:54,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:54,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:19:54,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:19:54,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:19:54,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 434 transitions, 4666 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:54,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:54,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:19:54,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:56,476 INFO L124 PetriNetUnfolderBase]: 3658/6130 cut-off events. [2024-06-21 17:19:56,476 INFO L125 PetriNetUnfolderBase]: For 721521/721523 co-relation queries the response was YES. [2024-06-21 17:19:56,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43135 conditions, 6130 events. 3658/6130 cut-off events. For 721521/721523 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 40773 event pairs, 761 based on Foata normal form. 2/6131 useless extension candidates. Maximal degree in co-relation 42974. Up to 4905 conditions per place. [2024-06-21 17:19:56,559 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 273 selfloop transitions, 183 changer transitions 0/461 dead transitions. [2024-06-21 17:19:56,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 461 transitions, 6114 flow [2024-06-21 17:19:56,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:19:56,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:19:56,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 17:19:56,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 17:19:56,561 INFO L175 Difference]: Start difference. First operand has 352 places, 434 transitions, 4666 flow. Second operand 9 states and 159 transitions. [2024-06-21 17:19:56,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 461 transitions, 6114 flow [2024-06-21 17:19:58,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 461 transitions, 5995 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 17:19:58,839 INFO L231 Difference]: Finished difference. Result has 354 places, 434 transitions, 4919 flow [2024-06-21 17:19:58,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4547, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4919, PETRI_PLACES=354, PETRI_TRANSITIONS=434} [2024-06-21 17:19:58,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-21 17:19:58,839 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 434 transitions, 4919 flow [2024-06-21 17:19:58,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:58,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:58,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:58,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 17:19:58,840 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:58,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:58,840 INFO L85 PathProgramCache]: Analyzing trace with hash 830611764, now seen corresponding path program 12 times [2024-06-21 17:19:58,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:58,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632704069] [2024-06-21 17:19:58,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:58,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:02,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:02,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632704069] [2024-06-21 17:20:02,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632704069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:02,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:02,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:02,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508836210] [2024-06-21 17:20:02,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:02,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:02,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:02,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:02,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:02,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:20:02,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 434 transitions, 4919 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:02,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:02,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:20:02,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:04,165 INFO L124 PetriNetUnfolderBase]: 3652/6122 cut-off events. [2024-06-21 17:20:04,178 INFO L125 PetriNetUnfolderBase]: For 720542/720544 co-relation queries the response was YES. [2024-06-21 17:20:04,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43429 conditions, 6122 events. 3652/6122 cut-off events. For 720542/720544 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 40729 event pairs, 761 based on Foata normal form. 2/6123 useless extension candidates. Maximal degree in co-relation 43267. Up to 4900 conditions per place. [2024-06-21 17:20:04,272 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 268 selfloop transitions, 187 changer transitions 0/460 dead transitions. [2024-06-21 17:20:04,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 460 transitions, 6131 flow [2024-06-21 17:20:04,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:20:04,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:20:04,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:20:04,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 17:20:04,274 INFO L175 Difference]: Start difference. First operand has 354 places, 434 transitions, 4919 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:20:04,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 460 transitions, 6131 flow [2024-06-21 17:20:07,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 460 transitions, 5681 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 17:20:07,166 INFO L231 Difference]: Finished difference. Result has 354 places, 434 transitions, 4849 flow [2024-06-21 17:20:07,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4469, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4849, PETRI_PLACES=354, PETRI_TRANSITIONS=434} [2024-06-21 17:20:07,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-21 17:20:07,167 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 434 transitions, 4849 flow [2024-06-21 17:20:07,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:07,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:07,167 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, 1] [2024-06-21 17:20:07,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 17:20:07,168 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:07,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:07,168 INFO L85 PathProgramCache]: Analyzing trace with hash -435589388, now seen corresponding path program 13 times [2024-06-21 17:20:07,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:07,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670231636] [2024-06-21 17:20:07,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:07,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:10,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:10,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670231636] [2024-06-21 17:20:10,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670231636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:10,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:10,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:10,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249323973] [2024-06-21 17:20:10,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:10,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:10,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:10,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:10,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:10,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:20:10,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 434 transitions, 4849 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:10,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:10,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:20:10,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:13,007 INFO L124 PetriNetUnfolderBase]: 3688/6176 cut-off events. [2024-06-21 17:20:13,007 INFO L125 PetriNetUnfolderBase]: For 760715/760721 co-relation queries the response was YES. [2024-06-21 17:20:13,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44131 conditions, 6176 events. 3688/6176 cut-off events. For 760715/760721 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 41087 event pairs, 788 based on Foata normal form. 5/6180 useless extension candidates. Maximal degree in co-relation 43968. Up to 5228 conditions per place. [2024-06-21 17:20:13,107 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 358 selfloop transitions, 118 changer transitions 0/481 dead transitions. [2024-06-21 17:20:13,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 481 transitions, 6536 flow [2024-06-21 17:20:13,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:20:13,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:20:13,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 205 transitions. [2024-06-21 17:20:13,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40674603174603174 [2024-06-21 17:20:13,109 INFO L175 Difference]: Start difference. First operand has 354 places, 434 transitions, 4849 flow. Second operand 12 states and 205 transitions. [2024-06-21 17:20:13,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 481 transitions, 6536 flow [2024-06-21 17:20:15,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 481 transitions, 6091 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-21 17:20:15,746 INFO L231 Difference]: Finished difference. Result has 356 places, 441 transitions, 4798 flow [2024-06-21 17:20:15,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4418, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4798, PETRI_PLACES=356, PETRI_TRANSITIONS=441} [2024-06-21 17:20:15,746 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-21 17:20:15,746 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 441 transitions, 4798 flow [2024-06-21 17:20:15,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:15,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:15,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:15,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 17:20:15,748 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:15,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:15,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1807899180, now seen corresponding path program 14 times [2024-06-21 17:20:15,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:15,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618940384] [2024-06-21 17:20:15,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:15,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:18,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:18,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618940384] [2024-06-21 17:20:18,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618940384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:18,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:18,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:18,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905062181] [2024-06-21 17:20:18,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:18,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:18,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:18,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:18,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:18,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:20:18,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 441 transitions, 4798 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:18,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:18,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:20:18,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:21,140 INFO L124 PetriNetUnfolderBase]: 3730/6242 cut-off events. [2024-06-21 17:20:21,140 INFO L125 PetriNetUnfolderBase]: For 787115/787121 co-relation queries the response was YES. [2024-06-21 17:20:21,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44929 conditions, 6242 events. 3730/6242 cut-off events. For 787115/787121 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 41550 event pairs, 788 based on Foata normal form. 3/6244 useless extension candidates. Maximal degree in co-relation 44765. Up to 5268 conditions per place. [2024-06-21 17:20:21,247 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 354 selfloop transitions, 123 changer transitions 0/482 dead transitions. [2024-06-21 17:20:21,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 482 transitions, 6470 flow [2024-06-21 17:20:21,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:20:21,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:20:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-21 17:20:21,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-21 17:20:21,249 INFO L175 Difference]: Start difference. First operand has 356 places, 441 transitions, 4798 flow. Second operand 11 states and 189 transitions. [2024-06-21 17:20:21,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 482 transitions, 6470 flow [2024-06-21 17:20:24,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 482 transitions, 6039 flow, removed 75 selfloop flow, removed 9 redundant places. [2024-06-21 17:20:24,202 INFO L231 Difference]: Finished difference. Result has 358 places, 448 transitions, 4769 flow [2024-06-21 17:20:24,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4427, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4769, PETRI_PLACES=358, PETRI_TRANSITIONS=448} [2024-06-21 17:20:24,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-21 17:20:24,203 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 448 transitions, 4769 flow [2024-06-21 17:20:24,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:24,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:24,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:24,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 17:20:24,204 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:24,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:24,204 INFO L85 PathProgramCache]: Analyzing trace with hash -355932386, now seen corresponding path program 15 times [2024-06-21 17:20:24,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:24,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277426474] [2024-06-21 17:20:24,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:24,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:27,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:27,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277426474] [2024-06-21 17:20:27,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277426474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:27,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:27,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:27,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102136233] [2024-06-21 17:20:27,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:27,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:27,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:27,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:27,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:27,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:20:27,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 448 transitions, 4769 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:27,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:27,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:20:27,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:29,738 INFO L124 PetriNetUnfolderBase]: 3782/6322 cut-off events. [2024-06-21 17:20:29,738 INFO L125 PetriNetUnfolderBase]: For 841358/841364 co-relation queries the response was YES. [2024-06-21 17:20:29,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45616 conditions, 6322 events. 3782/6322 cut-off events. For 841358/841364 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 42127 event pairs, 794 based on Foata normal form. 5/6326 useless extension candidates. Maximal degree in co-relation 45451. Up to 5318 conditions per place. [2024-06-21 17:20:29,826 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 364 selfloop transitions, 128 changer transitions 0/497 dead transitions. [2024-06-21 17:20:29,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 497 transitions, 6710 flow [2024-06-21 17:20:29,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:20:29,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:20:29,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 209 transitions. [2024-06-21 17:20:29,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146825396825397 [2024-06-21 17:20:29,827 INFO L175 Difference]: Start difference. First operand has 358 places, 448 transitions, 4769 flow. Second operand 12 states and 209 transitions. [2024-06-21 17:20:29,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 497 transitions, 6710 flow [2024-06-21 17:20:33,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 497 transitions, 6468 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 17:20:33,116 INFO L231 Difference]: Finished difference. Result has 363 places, 456 transitions, 4911 flow [2024-06-21 17:20:33,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4535, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4911, PETRI_PLACES=363, PETRI_TRANSITIONS=456} [2024-06-21 17:20:33,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-21 17:20:33,117 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 456 transitions, 4911 flow [2024-06-21 17:20:33,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:33,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:33,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:33,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 17:20:33,117 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:33,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:33,118 INFO L85 PathProgramCache]: Analyzing trace with hash -355603879, now seen corresponding path program 4 times [2024-06-21 17:20:33,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:33,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461220420] [2024-06-21 17:20:33,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:33,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:36,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:36,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461220420] [2024-06-21 17:20:36,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461220420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:36,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:36,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:36,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996032936] [2024-06-21 17:20:36,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:36,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:36,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:36,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:36,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:36,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:20:36,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 456 transitions, 4911 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:36,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:36,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:20:36,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:38,976 INFO L124 PetriNetUnfolderBase]: 3808/6365 cut-off events. [2024-06-21 17:20:38,976 INFO L125 PetriNetUnfolderBase]: For 855708/855720 co-relation queries the response was YES. [2024-06-21 17:20:39,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46256 conditions, 6365 events. 3808/6365 cut-off events. For 855708/855720 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 42474 event pairs, 786 based on Foata normal form. 14/6379 useless extension candidates. Maximal degree in co-relation 46090. Up to 5707 conditions per place. [2024-06-21 17:20:39,069 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 428 selfloop transitions, 65 changer transitions 0/498 dead transitions. [2024-06-21 17:20:39,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 498 transitions, 6601 flow [2024-06-21 17:20:39,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:20:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:20:39,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-21 17:20:39,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39826839826839827 [2024-06-21 17:20:39,071 INFO L175 Difference]: Start difference. First operand has 363 places, 456 transitions, 4911 flow. Second operand 11 states and 184 transitions. [2024-06-21 17:20:39,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 498 transitions, 6601 flow [2024-06-21 17:20:42,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 498 transitions, 6346 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 17:20:42,406 INFO L231 Difference]: Finished difference. Result has 366 places, 462 transitions, 4908 flow [2024-06-21 17:20:42,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4656, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4908, PETRI_PLACES=366, PETRI_TRANSITIONS=462} [2024-06-21 17:20:42,406 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-21 17:20:42,406 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 462 transitions, 4908 flow [2024-06-21 17:20:42,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:42,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:42,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:42,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 17:20:42,407 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:42,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:42,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1313525112, now seen corresponding path program 16 times [2024-06-21 17:20:42,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:42,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251607942] [2024-06-21 17:20:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:42,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:45,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:45,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251607942] [2024-06-21 17:20:45,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251607942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:45,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:45,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:45,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784159472] [2024-06-21 17:20:45,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:45,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:45,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:45,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:45,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:45,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:20:45,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 462 transitions, 4908 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:45,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:45,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:20:45,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:47,753 INFO L124 PetriNetUnfolderBase]: 3812/6372 cut-off events. [2024-06-21 17:20:47,753 INFO L125 PetriNetUnfolderBase]: For 867922/867928 co-relation queries the response was YES. [2024-06-21 17:20:47,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45791 conditions, 6372 events. 3812/6372 cut-off events. For 867922/867928 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 42544 event pairs, 795 based on Foata normal form. 5/6376 useless extension candidates. Maximal degree in co-relation 45624. Up to 5359 conditions per place. [2024-06-21 17:20:47,832 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 366 selfloop transitions, 128 changer transitions 0/499 dead transitions. [2024-06-21 17:20:47,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 499 transitions, 6520 flow [2024-06-21 17:20:47,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:20:47,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:20:47,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-21 17:20:47,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134199134199134 [2024-06-21 17:20:47,834 INFO L175 Difference]: Start difference. First operand has 366 places, 462 transitions, 4908 flow. Second operand 11 states and 191 transitions. [2024-06-21 17:20:47,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 499 transitions, 6520 flow [2024-06-21 17:20:50,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 499 transitions, 6318 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-21 17:20:50,520 INFO L231 Difference]: Finished difference. Result has 369 places, 465 transitions, 5014 flow [2024-06-21 17:20:50,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4706, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5014, PETRI_PLACES=369, PETRI_TRANSITIONS=465} [2024-06-21 17:20:50,520 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-21 17:20:50,520 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 465 transitions, 5014 flow [2024-06-21 17:20:50,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:50,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:50,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:50,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 17:20:50,521 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:50,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:50,521 INFO L85 PathProgramCache]: Analyzing trace with hash -440824561, now seen corresponding path program 4 times [2024-06-21 17:20:50,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:50,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971367766] [2024-06-21 17:20:50,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:50,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:54,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:54,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971367766] [2024-06-21 17:20:54,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971367766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:54,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:54,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:54,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559072493] [2024-06-21 17:20:54,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:54,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:54,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:54,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:54,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:54,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:20:54,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 465 transitions, 5014 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:54,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:54,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:20:54,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:56,579 INFO L124 PetriNetUnfolderBase]: 3807/6376 cut-off events. [2024-06-21 17:20:56,579 INFO L125 PetriNetUnfolderBase]: For 850779/850791 co-relation queries the response was YES. [2024-06-21 17:20:56,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45813 conditions, 6376 events. 3807/6376 cut-off events. For 850779/850791 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 42684 event pairs, 799 based on Foata normal form. 14/6390 useless extension candidates. Maximal degree in co-relation 45645. Up to 5863 conditions per place. [2024-06-21 17:20:56,668 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 462 selfloop transitions, 24 changer transitions 0/491 dead transitions. [2024-06-21 17:20:56,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 491 transitions, 6079 flow [2024-06-21 17:20:56,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:20:56,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:20:56,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 17:20:56,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 17:20:56,670 INFO L175 Difference]: Start difference. First operand has 369 places, 465 transitions, 5014 flow. Second operand 8 states and 130 transitions. [2024-06-21 17:20:56,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 491 transitions, 6079 flow [2024-06-21 17:20:59,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 491 transitions, 5769 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-21 17:20:59,897 INFO L231 Difference]: Finished difference. Result has 369 places, 466 transitions, 4778 flow [2024-06-21 17:20:59,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4714, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4778, PETRI_PLACES=369, PETRI_TRANSITIONS=466} [2024-06-21 17:20:59,898 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-21 17:20:59,898 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 466 transitions, 4778 flow [2024-06-21 17:20:59,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:59,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:59,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:59,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 17:20:59,899 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:59,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:59,899 INFO L85 PathProgramCache]: Analyzing trace with hash -350962466, now seen corresponding path program 17 times [2024-06-21 17:20:59,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:59,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024218929] [2024-06-21 17:20:59,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:59,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:02,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:02,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024218929] [2024-06-21 17:21:02,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024218929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:02,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:02,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:02,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874379165] [2024-06-21 17:21:02,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:02,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:02,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:02,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:02,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:03,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:21:03,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 466 transitions, 4778 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:03,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:03,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:21:03,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:05,053 INFO L124 PetriNetUnfolderBase]: 3801/6357 cut-off events. [2024-06-21 17:21:05,053 INFO L125 PetriNetUnfolderBase]: For 846045/846051 co-relation queries the response was YES. [2024-06-21 17:21:05,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45021 conditions, 6357 events. 3801/6357 cut-off events. For 846045/846051 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 42445 event pairs, 798 based on Foata normal form. 3/6359 useless extension candidates. Maximal degree in co-relation 44852. Up to 5347 conditions per place. [2024-06-21 17:21:05,299 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 363 selfloop transitions, 125 changer transitions 0/493 dead transitions. [2024-06-21 17:21:05,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 493 transitions, 6324 flow [2024-06-21 17:21:05,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:21:05,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:21:05,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:21:05,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 17:21:05,301 INFO L175 Difference]: Start difference. First operand has 369 places, 466 transitions, 4778 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:21:05,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 493 transitions, 6324 flow [2024-06-21 17:21:08,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 493 transitions, 6245 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:08,587 INFO L231 Difference]: Finished difference. Result has 372 places, 466 transitions, 4955 flow [2024-06-21 17:21:08,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4699, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4955, PETRI_PLACES=372, PETRI_TRANSITIONS=466} [2024-06-21 17:21:08,588 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-21 17:21:08,588 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 466 transitions, 4955 flow [2024-06-21 17:21:08,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:08,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:08,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:08,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 17:21:08,588 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:08,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:08,590 INFO L85 PathProgramCache]: Analyzing trace with hash -647957001, now seen corresponding path program 5 times [2024-06-21 17:21:08,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:08,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911468571] [2024-06-21 17:21:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:08,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:11,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:11,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911468571] [2024-06-21 17:21:11,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911468571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:11,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:11,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:11,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735549388] [2024-06-21 17:21:11,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:11,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:11,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:11,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:11,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:11,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:21:11,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 466 transitions, 4955 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:11,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:11,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:21:11,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:14,262 INFO L124 PetriNetUnfolderBase]: 3795/6350 cut-off events. [2024-06-21 17:21:14,262 INFO L125 PetriNetUnfolderBase]: For 844427/844439 co-relation queries the response was YES. [2024-06-21 17:21:14,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45207 conditions, 6350 events. 3795/6350 cut-off events. For 844427/844439 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 42476 event pairs, 785 based on Foata normal form. 14/6364 useless extension candidates. Maximal degree in co-relation 45037. Up to 5693 conditions per place. [2024-06-21 17:21:14,359 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 425 selfloop transitions, 64 changer transitions 0/494 dead transitions. [2024-06-21 17:21:14,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 494 transitions, 6265 flow [2024-06-21 17:21:14,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:21:14,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:21:14,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:21:14,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 17:21:14,361 INFO L175 Difference]: Start difference. First operand has 372 places, 466 transitions, 4955 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:21:14,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 494 transitions, 6265 flow [2024-06-21 17:21:18,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 494 transitions, 5973 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 17:21:18,290 INFO L231 Difference]: Finished difference. Result has 372 places, 466 transitions, 4797 flow [2024-06-21 17:21:18,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4663, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4797, PETRI_PLACES=372, PETRI_TRANSITIONS=466} [2024-06-21 17:21:18,291 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-21 17:21:18,291 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 466 transitions, 4797 flow [2024-06-21 17:21:18,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:18,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:18,291 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] [2024-06-21 17:21:18,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 17:21:18,292 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:18,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:18,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1818076170, now seen corresponding path program 18 times [2024-06-21 17:21:18,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:18,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746633782] [2024-06-21 17:21:18,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:18,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:21,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:21,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746633782] [2024-06-21 17:21:21,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746633782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:21,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:21,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:21,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176112777] [2024-06-21 17:21:21,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:21,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:21,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:21,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:21,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:21,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:21:21,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 466 transitions, 4797 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:21,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:21,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:21:21,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:23,499 INFO L124 PetriNetUnfolderBase]: 3789/6341 cut-off events. [2024-06-21 17:21:23,500 INFO L125 PetriNetUnfolderBase]: For 839375/839381 co-relation queries the response was YES. [2024-06-21 17:21:23,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44675 conditions, 6341 events. 3789/6341 cut-off events. For 839375/839381 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 42371 event pairs, 789 based on Foata normal form. 3/6343 useless extension candidates. Maximal degree in co-relation 44504. Up to 5334 conditions per place. [2024-06-21 17:21:23,592 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 360 selfloop transitions, 128 changer transitions 0/493 dead transitions. [2024-06-21 17:21:23,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 493 transitions, 6351 flow [2024-06-21 17:21:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:21:23,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:21:23,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 17:21:23,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-21 17:21:23,596 INFO L175 Difference]: Start difference. First operand has 372 places, 466 transitions, 4797 flow. Second operand 9 states and 158 transitions. [2024-06-21 17:21:23,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 493 transitions, 6351 flow [2024-06-21 17:21:26,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 493 transitions, 6181 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 17:21:26,467 INFO L231 Difference]: Finished difference. Result has 373 places, 466 transitions, 4889 flow [2024-06-21 17:21:26,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4627, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4889, PETRI_PLACES=373, PETRI_TRANSITIONS=466} [2024-06-21 17:21:26,469 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-21 17:21:26,469 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 466 transitions, 4889 flow [2024-06-21 17:21:26,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:26,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:26,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:26,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 17:21:26,471 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:26,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:26,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1880931328, now seen corresponding path program 19 times [2024-06-21 17:21:26,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:26,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769108489] [2024-06-21 17:21:26,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:26,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:29,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:29,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769108489] [2024-06-21 17:21:29,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769108489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:29,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:29,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:29,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722627586] [2024-06-21 17:21:29,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:29,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:29,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:29,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:29,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:29,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:21:29,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 466 transitions, 4889 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:29,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:29,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:21:29,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:31,792 INFO L124 PetriNetUnfolderBase]: 3777/6329 cut-off events. [2024-06-21 17:21:31,792 INFO L125 PetriNetUnfolderBase]: For 836284/836290 co-relation queries the response was YES. [2024-06-21 17:21:31,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44399 conditions, 6329 events. 3777/6329 cut-off events. For 836284/836290 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 42356 event pairs, 801 based on Foata normal form. 5/6333 useless extension candidates. Maximal degree in co-relation 44227. Up to 5428 conditions per place. [2024-06-21 17:21:31,885 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 397 selfloop transitions, 100 changer transitions 0/502 dead transitions. [2024-06-21 17:21:31,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 502 transitions, 6235 flow [2024-06-21 17:21:31,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:21:31,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:21:31,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-21 17:21:31,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 17:21:31,887 INFO L175 Difference]: Start difference. First operand has 373 places, 466 transitions, 4889 flow. Second operand 11 states and 187 transitions. [2024-06-21 17:21:31,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 502 transitions, 6235 flow [2024-06-21 17:21:35,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 502 transitions, 5941 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 17:21:35,075 INFO L231 Difference]: Finished difference. Result has 376 places, 466 transitions, 4804 flow [2024-06-21 17:21:35,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4595, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4804, PETRI_PLACES=376, PETRI_TRANSITIONS=466} [2024-06-21 17:21:35,076 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 333 predicate places. [2024-06-21 17:21:35,076 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 466 transitions, 4804 flow [2024-06-21 17:21:35,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:35,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:35,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:35,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 17:21:35,077 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:35,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:35,077 INFO L85 PathProgramCache]: Analyzing trace with hash 288441178, now seen corresponding path program 20 times [2024-06-21 17:21:35,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:35,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225562236] [2024-06-21 17:21:35,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:35,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:38,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:38,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225562236] [2024-06-21 17:21:38,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225562236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:38,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:38,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:38,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606893480] [2024-06-21 17:21:38,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:38,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:38,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:38,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:38,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:38,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:21:38,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 466 transitions, 4804 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:38,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:38,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:21:38,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:40,608 INFO L124 PetriNetUnfolderBase]: 3765/6313 cut-off events. [2024-06-21 17:21:40,609 INFO L125 PetriNetUnfolderBase]: For 814367/814373 co-relation queries the response was YES. [2024-06-21 17:21:40,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43726 conditions, 6313 events. 3765/6313 cut-off events. For 814367/814373 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 42310 event pairs, 801 based on Foata normal form. 5/6317 useless extension candidates. Maximal degree in co-relation 43553. Up to 5418 conditions per place. [2024-06-21 17:21:40,703 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 392 selfloop transitions, 97 changer transitions 0/494 dead transitions. [2024-06-21 17:21:40,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 494 transitions, 5858 flow [2024-06-21 17:21:40,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:21:40,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:21:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:21:40,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 17:21:40,705 INFO L175 Difference]: Start difference. First operand has 376 places, 466 transitions, 4804 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:21:40,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 494 transitions, 5858 flow [2024-06-21 17:21:43,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 494 transitions, 5523 flow, removed 20 selfloop flow, removed 12 redundant places. [2024-06-21 17:21:43,882 INFO L231 Difference]: Finished difference. Result has 373 places, 466 transitions, 4671 flow [2024-06-21 17:21:43,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4469, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4671, PETRI_PLACES=373, PETRI_TRANSITIONS=466} [2024-06-21 17:21:43,882 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-21 17:21:43,882 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 466 transitions, 4671 flow [2024-06-21 17:21:43,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:43,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:43,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:43,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 17:21:43,883 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:43,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:43,884 INFO L85 PathProgramCache]: Analyzing trace with hash 288441395, now seen corresponding path program 6 times [2024-06-21 17:21:43,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:43,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435740329] [2024-06-21 17:21:43,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:43,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:47,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:47,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435740329] [2024-06-21 17:21:47,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435740329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:47,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:47,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:47,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218857295] [2024-06-21 17:21:47,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:47,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:47,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:47,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:47,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:47,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:21:47,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 466 transitions, 4671 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:47,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:47,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:21:47,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:49,480 INFO L124 PetriNetUnfolderBase]: 3759/6310 cut-off events. [2024-06-21 17:21:49,481 INFO L125 PetriNetUnfolderBase]: For 791552/791564 co-relation queries the response was YES. [2024-06-21 17:21:49,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43325 conditions, 6310 events. 3759/6310 cut-off events. For 791552/791564 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 42345 event pairs, 789 based on Foata normal form. 14/6324 useless extension candidates. Maximal degree in co-relation 43151. Up to 5690 conditions per place. [2024-06-21 17:21:49,576 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 441 selfloop transitions, 50 changer transitions 0/496 dead transitions. [2024-06-21 17:21:49,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 496 transitions, 5741 flow [2024-06-21 17:21:49,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:21:49,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:21:49,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:21:49,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 17:21:49,578 INFO L175 Difference]: Start difference. First operand has 373 places, 466 transitions, 4671 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:21:49,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 496 transitions, 5741 flow [2024-06-21 17:21:53,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 496 transitions, 5525 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 17:21:53,194 INFO L231 Difference]: Finished difference. Result has 374 places, 466 transitions, 4561 flow [2024-06-21 17:21:53,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4455, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4561, PETRI_PLACES=374, PETRI_TRANSITIONS=466} [2024-06-21 17:21:53,206 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-21 17:21:53,206 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 466 transitions, 4561 flow [2024-06-21 17:21:53,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:53,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:53,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:53,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 17:21:53,207 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:53,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:53,207 INFO L85 PathProgramCache]: Analyzing trace with hash 557202095, now seen corresponding path program 7 times [2024-06-21 17:21:53,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:53,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702889411] [2024-06-21 17:21:53,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:53,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:56,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:56,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:56,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702889411] [2024-06-21 17:21:56,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702889411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:56,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:56,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:56,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607483876] [2024-06-21 17:21:56,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:56,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:56,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:56,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:56,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:56,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:21:56,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 466 transitions, 4561 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:56,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:56,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:21:56,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:58,536 INFO L124 PetriNetUnfolderBase]: 3769/6322 cut-off events. [2024-06-21 17:21:58,537 INFO L125 PetriNetUnfolderBase]: For 802649/802661 co-relation queries the response was YES. [2024-06-21 17:21:58,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43318 conditions, 6322 events. 3769/6322 cut-off events. For 802649/802661 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 42499 event pairs, 789 based on Foata normal form. 14/6336 useless extension candidates. Maximal degree in co-relation 43143. Up to 5692 conditions per place. [2024-06-21 17:21:58,631 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 436 selfloop transitions, 58 changer transitions 0/499 dead transitions. [2024-06-21 17:21:58,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 499 transitions, 5715 flow [2024-06-21 17:21:58,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:21:58,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:21:58,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 17:21:58,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 17:21:58,632 INFO L175 Difference]: Start difference. First operand has 374 places, 466 transitions, 4561 flow. Second operand 9 states and 150 transitions. [2024-06-21 17:21:58,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 499 transitions, 5715 flow [2024-06-21 17:22:01,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 499 transitions, 5584 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 17:22:01,465 INFO L231 Difference]: Finished difference. Result has 375 places, 469 transitions, 4636 flow [2024-06-21 17:22:01,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4430, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4636, PETRI_PLACES=375, PETRI_TRANSITIONS=469} [2024-06-21 17:22:01,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-21 17:22:01,466 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 469 transitions, 4636 flow [2024-06-21 17:22:01,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:01,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:01,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:01,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 17:22:01,466 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:01,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:01,467 INFO L85 PathProgramCache]: Analyzing trace with hash 672493265, now seen corresponding path program 8 times [2024-06-21 17:22:01,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:01,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309931595] [2024-06-21 17:22:01,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:01,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:01,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:04,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:04,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309931595] [2024-06-21 17:22:04,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309931595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:04,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:04,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:04,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250443898] [2024-06-21 17:22:04,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:04,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:04,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:04,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:04,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:04,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:22:04,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 469 transitions, 4636 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:04,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:04,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:22:04,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:07,332 INFO L124 PetriNetUnfolderBase]: 3795/6354 cut-off events. [2024-06-21 17:22:07,333 INFO L125 PetriNetUnfolderBase]: For 834676/834688 co-relation queries the response was YES. [2024-06-21 17:22:07,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44448 conditions, 6354 events. 3795/6354 cut-off events. For 834676/834688 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 42633 event pairs, 700 based on Foata normal form. 14/6368 useless extension candidates. Maximal degree in co-relation 44272. Up to 5402 conditions per place. [2024-06-21 17:22:07,434 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 359 selfloop transitions, 146 changer transitions 0/510 dead transitions. [2024-06-21 17:22:07,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 510 transitions, 6514 flow [2024-06-21 17:22:07,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:22:07,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:22:07,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:22:07,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 17:22:07,436 INFO L175 Difference]: Start difference. First operand has 375 places, 469 transitions, 4636 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:22:07,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 510 transitions, 6514 flow [2024-06-21 17:22:11,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 510 transitions, 6319 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-21 17:22:11,919 INFO L231 Difference]: Finished difference. Result has 377 places, 478 transitions, 4997 flow [2024-06-21 17:22:11,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4441, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4997, PETRI_PLACES=377, PETRI_TRANSITIONS=478} [2024-06-21 17:22:11,920 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-21 17:22:11,920 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 478 transitions, 4997 flow [2024-06-21 17:22:11,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:11,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:11,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:11,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 17:22:11,920 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:11,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:11,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1496817861, now seen corresponding path program 9 times [2024-06-21 17:22:11,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:11,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015529788] [2024-06-21 17:22:11,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:11,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:15,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:15,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015529788] [2024-06-21 17:22:15,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015529788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:15,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:15,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:15,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920788622] [2024-06-21 17:22:15,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:15,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:15,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:15,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:15,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:15,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:22:15,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 478 transitions, 4997 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:15,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:15,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:22:15,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:17,788 INFO L124 PetriNetUnfolderBase]: 3789/6344 cut-off events. [2024-06-21 17:22:17,789 INFO L125 PetriNetUnfolderBase]: For 832702/832714 co-relation queries the response was YES. [2024-06-21 17:22:17,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44687 conditions, 6344 events. 3789/6344 cut-off events. For 832702/832714 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 42519 event pairs, 704 based on Foata normal form. 14/6358 useless extension candidates. Maximal degree in co-relation 44511. Up to 5397 conditions per place. [2024-06-21 17:22:17,894 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 360 selfloop transitions, 144 changer transitions 0/509 dead transitions. [2024-06-21 17:22:17,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 509 transitions, 6357 flow [2024-06-21 17:22:17,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:22:17,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:22:17,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 17:22:17,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 17:22:17,896 INFO L175 Difference]: Start difference. First operand has 377 places, 478 transitions, 4997 flow. Second operand 9 states and 156 transitions. [2024-06-21 17:22:17,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 509 transitions, 6357 flow [2024-06-21 17:22:21,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 509 transitions, 6101 flow, removed 83 selfloop flow, removed 4 redundant places. [2024-06-21 17:22:21,477 INFO L231 Difference]: Finished difference. Result has 382 places, 478 transitions, 5035 flow [2024-06-21 17:22:21,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4741, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5035, PETRI_PLACES=382, PETRI_TRANSITIONS=478} [2024-06-21 17:22:21,477 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-21 17:22:21,477 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 478 transitions, 5035 flow [2024-06-21 17:22:21,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:21,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:21,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:21,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 17:22:21,478 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:21,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:21,479 INFO L85 PathProgramCache]: Analyzing trace with hash 672226138, now seen corresponding path program 21 times [2024-06-21 17:22:21,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:21,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912113049] [2024-06-21 17:22:21,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:21,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:24,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:24,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912113049] [2024-06-21 17:22:24,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912113049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:24,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:24,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:24,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361260790] [2024-06-21 17:22:24,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:24,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:24,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:24,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:24,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:24,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:22:24,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 478 transitions, 5035 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:24,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:24,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:22:24,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:26,655 INFO L124 PetriNetUnfolderBase]: 3799/6371 cut-off events. [2024-06-21 17:22:26,655 INFO L125 PetriNetUnfolderBase]: For 839465/839471 co-relation queries the response was YES. [2024-06-21 17:22:26,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44757 conditions, 6371 events. 3799/6371 cut-off events. For 839465/839471 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 42839 event pairs, 725 based on Foata normal form. 3/6373 useless extension candidates. Maximal degree in co-relation 44579. Up to 5091 conditions per place. [2024-06-21 17:22:26,751 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 293 selfloop transitions, 231 changer transitions 0/529 dead transitions. [2024-06-21 17:22:26,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 529 transitions, 6655 flow [2024-06-21 17:22:26,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:22:26,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:22:26,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:22:26,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 17:22:26,753 INFO L175 Difference]: Start difference. First operand has 382 places, 478 transitions, 5035 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:22:26,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 529 transitions, 6655 flow [2024-06-21 17:22:29,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 529 transitions, 6341 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 17:22:29,899 INFO L231 Difference]: Finished difference. Result has 384 places, 500 transitions, 5503 flow [2024-06-21 17:22:29,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4721, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5503, PETRI_PLACES=384, PETRI_TRANSITIONS=500} [2024-06-21 17:22:29,900 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-21 17:22:29,900 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 500 transitions, 5503 flow [2024-06-21 17:22:29,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:29,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:29,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:29,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 17:22:29,900 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:29,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:29,901 INFO L85 PathProgramCache]: Analyzing trace with hash -96536205, now seen corresponding path program 10 times [2024-06-21 17:22:29,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:29,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333009267] [2024-06-21 17:22:29,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:29,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:33,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:33,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333009267] [2024-06-21 17:22:33,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333009267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:33,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:33,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:33,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169533043] [2024-06-21 17:22:33,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:33,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:33,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:33,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:33,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:33,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:22:33,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 500 transitions, 5503 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:33,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:33,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:22:33,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:35,872 INFO L124 PetriNetUnfolderBase]: 3825/6418 cut-off events. [2024-06-21 17:22:35,872 INFO L125 PetriNetUnfolderBase]: For 874907/874919 co-relation queries the response was YES. [2024-06-21 17:22:35,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46396 conditions, 6418 events. 3825/6418 cut-off events. For 874907/874919 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 43201 event pairs, 711 based on Foata normal form. 14/6432 useless extension candidates. Maximal degree in co-relation 46216. Up to 5436 conditions per place. [2024-06-21 17:22:35,970 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 381 selfloop transitions, 148 changer transitions 0/534 dead transitions. [2024-06-21 17:22:35,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 534 transitions, 7329 flow [2024-06-21 17:22:35,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:22:35,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:22:35,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 17:22:35,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 17:22:35,972 INFO L175 Difference]: Start difference. First operand has 384 places, 500 transitions, 5503 flow. Second operand 9 states and 154 transitions. [2024-06-21 17:22:35,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 534 transitions, 7329 flow [2024-06-21 17:22:39,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 534 transitions, 7119 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-21 17:22:39,407 INFO L231 Difference]: Finished difference. Result has 389 places, 506 transitions, 5747 flow [2024-06-21 17:22:39,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5293, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5747, PETRI_PLACES=389, PETRI_TRANSITIONS=506} [2024-06-21 17:22:39,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-21 17:22:39,421 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 506 transitions, 5747 flow [2024-06-21 17:22:39,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:39,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:39,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:39,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 17:22:39,422 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:39,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:39,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1331178944, now seen corresponding path program 22 times [2024-06-21 17:22:39,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:39,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639786366] [2024-06-21 17:22:39,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:39,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:42,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:42,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639786366] [2024-06-21 17:22:42,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639786366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:42,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:42,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:42,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580136658] [2024-06-21 17:22:42,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:42,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:42,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:42,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:42,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:42,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:22:42,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 506 transitions, 5747 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:42,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:42,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:22:42,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:44,462 INFO L124 PetriNetUnfolderBase]: 3851/6451 cut-off events. [2024-06-21 17:22:44,462 INFO L125 PetriNetUnfolderBase]: For 905715/905721 co-relation queries the response was YES. [2024-06-21 17:22:44,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47380 conditions, 6451 events. 3851/6451 cut-off events. For 905715/905721 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 43390 event pairs, 729 based on Foata normal form. 3/6453 useless extension candidates. Maximal degree in co-relation 47198. Up to 5152 conditions per place. [2024-06-21 17:22:44,551 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 309 selfloop transitions, 224 changer transitions 0/538 dead transitions. [2024-06-21 17:22:44,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 538 transitions, 7549 flow [2024-06-21 17:22:44,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:22:44,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:22:44,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 17:22:44,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 17:22:44,553 INFO L175 Difference]: Start difference. First operand has 389 places, 506 transitions, 5747 flow. Second operand 9 states and 155 transitions. [2024-06-21 17:22:44,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 538 transitions, 7549 flow [2024-06-21 17:22:48,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 538 transitions, 7245 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 17:22:48,620 INFO L231 Difference]: Finished difference. Result has 393 places, 512 transitions, 6025 flow [2024-06-21 17:22:48,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5443, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6025, PETRI_PLACES=393, PETRI_TRANSITIONS=512} [2024-06-21 17:22:48,620 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-21 17:22:48,620 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 512 transitions, 6025 flow [2024-06-21 17:22:48,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:48,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:48,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:48,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 17:22:48,621 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:48,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:48,621 INFO L85 PathProgramCache]: Analyzing trace with hash -2132388715, now seen corresponding path program 5 times [2024-06-21 17:22:48,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:48,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517652041] [2024-06-21 17:22:48,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:48,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:48,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:51,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:51,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517652041] [2024-06-21 17:22:51,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517652041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:51,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:51,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:51,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459284880] [2024-06-21 17:22:51,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:51,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:51,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:51,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:51,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:52,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:22:52,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 512 transitions, 6025 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:52,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:52,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:22:52,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:54,191 INFO L124 PetriNetUnfolderBase]: 3859/6470 cut-off events. [2024-06-21 17:22:54,191 INFO L125 PetriNetUnfolderBase]: For 919315/919327 co-relation queries the response was YES. [2024-06-21 17:22:54,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47808 conditions, 6470 events. 3859/6470 cut-off events. For 919315/919327 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 43566 event pairs, 725 based on Foata normal form. 14/6484 useless extension candidates. Maximal degree in co-relation 47625. Up to 5857 conditions per place. [2024-06-21 17:22:54,292 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 482 selfloop transitions, 51 changer transitions 0/538 dead transitions. [2024-06-21 17:22:54,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 538 transitions, 7225 flow [2024-06-21 17:22:54,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:54,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:54,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:22:54,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 17:22:54,293 INFO L175 Difference]: Start difference. First operand has 393 places, 512 transitions, 6025 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:22:54,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 538 transitions, 7225 flow [2024-06-21 17:22:58,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 538 transitions, 6866 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 17:22:58,827 INFO L231 Difference]: Finished difference. Result has 396 places, 514 transitions, 5843 flow [2024-06-21 17:22:58,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5666, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5843, PETRI_PLACES=396, PETRI_TRANSITIONS=514} [2024-06-21 17:22:58,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-21 17:22:58,827 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 514 transitions, 5843 flow [2024-06-21 17:22:58,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:58,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:58,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:58,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 17:22:58,828 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:58,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:58,829 INFO L85 PathProgramCache]: Analyzing trace with hash 844805583, now seen corresponding path program 6 times [2024-06-21 17:22:58,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:58,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093783985] [2024-06-21 17:22:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:58,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:01,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:01,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093783985] [2024-06-21 17:23:01,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093783985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:01,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:01,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:23:01,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007510976] [2024-06-21 17:23:01,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:01,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:23:01,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:01,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:23:01,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:23:01,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:23:01,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 514 transitions, 5843 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:01,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:01,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:23:01,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:04,129 INFO L124 PetriNetUnfolderBase]: 3867/6490 cut-off events. [2024-06-21 17:23:04,129 INFO L125 PetriNetUnfolderBase]: For 932842/932854 co-relation queries the response was YES. [2024-06-21 17:23:04,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47585 conditions, 6490 events. 3867/6490 cut-off events. For 932842/932854 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 43802 event pairs, 723 based on Foata normal form. 14/6504 useless extension candidates. Maximal degree in co-relation 47401. Up to 5843 conditions per place. [2024-06-21 17:23:04,237 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 477 selfloop transitions, 58 changer transitions 0/540 dead transitions. [2024-06-21 17:23:04,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 540 transitions, 7051 flow [2024-06-21 17:23:04,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:04,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:04,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:23:04,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 17:23:04,239 INFO L175 Difference]: Start difference. First operand has 396 places, 514 transitions, 5843 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:23:04,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 540 transitions, 7051 flow [2024-06-21 17:23:08,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 540 transitions, 6890 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 17:23:08,633 INFO L231 Difference]: Finished difference. Result has 398 places, 516 transitions, 5877 flow [2024-06-21 17:23:08,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5682, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5877, PETRI_PLACES=398, PETRI_TRANSITIONS=516} [2024-06-21 17:23:08,633 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-21 17:23:08,634 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 516 transitions, 5877 flow [2024-06-21 17:23:08,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:08,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:08,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:08,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 17:23:08,634 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:08,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:08,635 INFO L85 PathProgramCache]: Analyzing trace with hash 830513622, now seen corresponding path program 23 times [2024-06-21 17:23:08,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:08,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040269422] [2024-06-21 17:23:08,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:08,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:11,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:11,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040269422] [2024-06-21 17:23:11,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040269422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:11,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:11,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:23:11,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056624223] [2024-06-21 17:23:11,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:11,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:23:11,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:11,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:23:11,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:23:11,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:23:11,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 516 transitions, 5877 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:11,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:11,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:23:11,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:14,244 INFO L124 PetriNetUnfolderBase]: 3877/6497 cut-off events. [2024-06-21 17:23:14,245 INFO L125 PetriNetUnfolderBase]: For 946073/946079 co-relation queries the response was YES. [2024-06-21 17:23:14,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47787 conditions, 6497 events. 3877/6497 cut-off events. For 946073/946079 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 43815 event pairs, 743 based on Foata normal form. 3/6499 useless extension candidates. Maximal degree in co-relation 47602. Up to 5186 conditions per place. [2024-06-21 17:23:14,338 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 320 selfloop transitions, 220 changer transitions 0/545 dead transitions. [2024-06-21 17:23:14,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 545 transitions, 7642 flow [2024-06-21 17:23:14,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:23:14,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:23:14,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 17:23:14,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 17:23:14,340 INFO L175 Difference]: Start difference. First operand has 398 places, 516 transitions, 5877 flow. Second operand 9 states and 156 transitions. [2024-06-21 17:23:14,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 545 transitions, 7642 flow [2024-06-21 17:23:18,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 545 transitions, 7463 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 17:23:18,473 INFO L231 Difference]: Finished difference. Result has 401 places, 519 transitions, 6209 flow [2024-06-21 17:23:18,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5698, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6209, PETRI_PLACES=401, PETRI_TRANSITIONS=519} [2024-06-21 17:23:18,474 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-21 17:23:18,474 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 519 transitions, 6209 flow [2024-06-21 17:23:18,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:18,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:18,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:18,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 17:23:18,474 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:18,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:18,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1331178727, now seen corresponding path program 11 times [2024-06-21 17:23:18,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:18,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522299143] [2024-06-21 17:23:18,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:18,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:21,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:21,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522299143] [2024-06-21 17:23:21,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522299143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:21,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:21,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:23:21,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261956316] [2024-06-21 17:23:21,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:21,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:23:21,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:21,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:23:21,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:23:21,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:23:21,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 519 transitions, 6209 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:21,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:21,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:23:21,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:24,439 INFO L124 PetriNetUnfolderBase]: 3887/6518 cut-off events. [2024-06-21 17:23:24,439 INFO L125 PetriNetUnfolderBase]: For 959779/959791 co-relation queries the response was YES. [2024-06-21 17:23:24,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48437 conditions, 6518 events. 3887/6518 cut-off events. For 959779/959791 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 44013 event pairs, 713 based on Foata normal form. 14/6532 useless extension candidates. Maximal degree in co-relation 48251. Up to 5520 conditions per place. [2024-06-21 17:23:24,528 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 397 selfloop transitions, 148 changer transitions 0/550 dead transitions. [2024-06-21 17:23:24,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 550 transitions, 7992 flow [2024-06-21 17:23:24,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:23:24,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:23:24,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 17:23:24,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 17:23:24,530 INFO L175 Difference]: Start difference. First operand has 401 places, 519 transitions, 6209 flow. Second operand 9 states and 155 transitions. [2024-06-21 17:23:24,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 550 transitions, 7992 flow [2024-06-21 17:23:28,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 550 transitions, 7451 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 17:23:28,689 INFO L231 Difference]: Finished difference. Result has 403 places, 522 transitions, 6027 flow [2024-06-21 17:23:28,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5668, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6027, PETRI_PLACES=403, PETRI_TRANSITIONS=522} [2024-06-21 17:23:28,690 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-21 17:23:28,690 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 522 transitions, 6027 flow [2024-06-21 17:23:28,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:28,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:28,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:28,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 17:23:28,691 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:28,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:28,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1031849579, now seen corresponding path program 12 times [2024-06-21 17:23:28,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:28,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79620129] [2024-06-21 17:23:28,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:28,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:31,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:31,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:31,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79620129] [2024-06-21 17:23:31,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79620129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:31,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:31,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:23:31,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808453567] [2024-06-21 17:23:31,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:31,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:23:31,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:31,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:23:31,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:23:31,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:23:31,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 522 transitions, 6027 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:31,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:31,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:23:31,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:34,518 INFO L124 PetriNetUnfolderBase]: 3881/6510 cut-off events. [2024-06-21 17:23:34,519 INFO L125 PetriNetUnfolderBase]: For 951479/951491 co-relation queries the response was YES. [2024-06-21 17:23:34,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47786 conditions, 6510 events. 3881/6510 cut-off events. For 951479/951491 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 43934 event pairs, 715 based on Foata normal form. 14/6524 useless extension candidates. Maximal degree in co-relation 47599. Up to 5515 conditions per place. [2024-06-21 17:23:34,626 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 395 selfloop transitions, 149 changer transitions 0/549 dead transitions. [2024-06-21 17:23:34,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 549 transitions, 7471 flow [2024-06-21 17:23:34,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:23:34,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:23:34,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 17:23:34,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 17:23:34,628 INFO L175 Difference]: Start difference. First operand has 403 places, 522 transitions, 6027 flow. Second operand 9 states and 153 transitions. [2024-06-21 17:23:34,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 549 transitions, 7471 flow [2024-06-21 17:23:39,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 549 transitions, 7129 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 17:23:39,628 INFO L231 Difference]: Finished difference. Result has 406 places, 522 transitions, 5989 flow [2024-06-21 17:23:39,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5685, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5989, PETRI_PLACES=406, PETRI_TRANSITIONS=522} [2024-06-21 17:23:39,629 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-21 17:23:39,629 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 522 transitions, 5989 flow [2024-06-21 17:23:39,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:39,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:39,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:39,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 17:23:39,630 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:39,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:39,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1338536174, now seen corresponding path program 24 times [2024-06-21 17:23:39,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:39,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123805071] [2024-06-21 17:23:39,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:39,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:42,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:42,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123805071] [2024-06-21 17:23:42,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123805071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:42,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:42,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:23:42,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361810573] [2024-06-21 17:23:42,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:42,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:23:42,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:42,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:23:42,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:23:42,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:23:42,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 522 transitions, 5989 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:42,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:42,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:23:42,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:45,106 INFO L124 PetriNetUnfolderBase]: 3875/6495 cut-off events. [2024-06-21 17:23:45,107 INFO L125 PetriNetUnfolderBase]: For 943544/943550 co-relation queries the response was YES. [2024-06-21 17:23:45,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47441 conditions, 6495 events. 3875/6495 cut-off events. For 943544/943550 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 43777 event pairs, 743 based on Foata normal form. 3/6497 useless extension candidates. Maximal degree in co-relation 47253. Up to 5187 conditions per place. [2024-06-21 17:23:45,216 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 320 selfloop transitions, 222 changer transitions 0/547 dead transitions. [2024-06-21 17:23:45,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 547 transitions, 7419 flow [2024-06-21 17:23:45,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:23:45,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:23:45,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 17:23:45,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 17:23:45,218 INFO L175 Difference]: Start difference. First operand has 406 places, 522 transitions, 5989 flow. Second operand 9 states and 154 transitions. [2024-06-21 17:23:45,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 547 transitions, 7419 flow [2024-06-21 17:23:49,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 547 transitions, 7043 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-21 17:23:49,779 INFO L231 Difference]: Finished difference. Result has 406 places, 522 transitions, 6063 flow [2024-06-21 17:23:49,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5613, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6063, PETRI_PLACES=406, PETRI_TRANSITIONS=522} [2024-06-21 17:23:49,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-21 17:23:49,793 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 522 transitions, 6063 flow [2024-06-21 17:23:49,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:49,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:49,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:49,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 17:23:49,793 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:49,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:49,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2039573053, now seen corresponding path program 7 times [2024-06-21 17:23:49,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:49,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687434541] [2024-06-21 17:23:49,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:49,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:53,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:53,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687434541] [2024-06-21 17:23:53,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687434541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:53,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:53,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:23:53,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005439481] [2024-06-21 17:23:53,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:53,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:23:53,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:53,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:23:53,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:23:53,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:23:53,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 522 transitions, 6063 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:53,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:53,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:23:53,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15