./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe002_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe002_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe002_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe002_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 17:19:02,428 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:19:02,486 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:19:02,490 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:19:02,490 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:19:02,517 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:19:02,517 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:19:02,517 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:19:02,518 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:19:02,521 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:19:02,521 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:19:02,521 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:19:02,522 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:19:02,523 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:19:02,523 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:19:02,523 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:19:02,523 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:19:02,523 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:19:02,524 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:19:02,524 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:19:02,524 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:19:02,524 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:19:02,525 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:19:02,525 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:19:02,525 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:19:02,525 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:19:02,525 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:19:02,525 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:19:02,526 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:19:02,526 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:19:02,527 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:19:02,527 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:19:02,527 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:19:02,527 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:19:02,527 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:19:02,528 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:19:02,528 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:19:02,528 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:19:02,528 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:19:02,528 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:19:02,528 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:19:02,529 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:19:02,529 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:19:02,529 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:19:02,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:19:02,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:19:02,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:19:02,769 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:19:02,770 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:19:02,770 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe002_rmo.oepc.yml/witness.yml [2024-06-21 17:19:02,933 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:19:02,934 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:19:02,934 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe002_rmo.oepc.i [2024-06-21 17:19:03,904 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:19:04,125 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:19:04,133 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe002_rmo.oepc.i [2024-06-21 17:19:04,151 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2c38e391/0e5e85a94b6f4f47ba7dc03f6c1eeca1/FLAGbfa400174 [2024-06-21 17:19:04,165 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2c38e391/0e5e85a94b6f4f47ba7dc03f6c1eeca1 [2024-06-21 17:19:04,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:19:04,167 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:19:04,168 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:19:04,169 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:19:04,172 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:19:04,173 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:19:02" (1/2) ... [2024-06-21 17:19:04,177 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@762f69b4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:19:04, skipping insertion in model container [2024-06-21 17:19:04,178 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:19:02" (1/2) ... [2024-06-21 17:19:04,179 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6329a294 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:19:04, skipping insertion in model container [2024-06-21 17:19:04,179 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:19:04" (2/2) ... [2024-06-21 17:19:04,179 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@762f69b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:19:04, skipping insertion in model container [2024-06-21 17:19:04,179 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:19:04" (2/2) ... [2024-06-21 17:19:04,180 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:19:04,291 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:19:04,292 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-21 17:19:04,292 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-21 17:19:04,293 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] ((((((((((((((((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-21 17:19:04,293 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:19:04,293 INFO L106 edCorrectnessWitness]: ghost_update [L853-L853] multithreaded = 1; [2024-06-21 17:19:04,336 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:19:04,686 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:19:04,697 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:19:04,838 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:19:04,877 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:19:04,877 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:19:04 WrapperNode [2024-06-21 17:19:04,877 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:19:04,878 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:19:04,878 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:19:04,878 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:19:04,884 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:19:04" (1/1) ... [2024-06-21 17:19:04,907 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:19:04" (1/1) ... [2024-06-21 17:19:04,942 INFO L138 Inliner]: procedures = 175, calls = 89, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 225 [2024-06-21 17:19:04,943 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:19:04,947 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:19:04,947 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:19:04,948 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:19:04,956 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:19:04" (1/1) ... [2024-06-21 17:19:04,956 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:19:04" (1/1) ... [2024-06-21 17:19:04,960 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:19:04" (1/1) ... [2024-06-21 17:19:04,974 INFO L175 MemorySlicer]: Split 48 memory accesses to 2 slices as follows [2, 46]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-21 17:19:04,975 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:19:04" (1/1) ... [2024-06-21 17:19:04,975 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:19:04" (1/1) ... [2024-06-21 17:19:04,985 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:19:04" (1/1) ... [2024-06-21 17:19:04,987 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:19:04" (1/1) ... [2024-06-21 17:19:04,989 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:19:04" (1/1) ... [2024-06-21 17:19:04,991 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:19:04" (1/1) ... [2024-06-21 17:19:04,994 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:19:04,995 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:19:04,995 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:19:04,995 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:19:04,996 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:19:04" (1/1) ... [2024-06-21 17:19:05,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:19:05,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:19:05,093 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 17:19:05,099 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 17:19:05,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 17:19:05,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 17:19:05,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 17:19:05,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 17:19:05,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:19:05,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:19:05,125 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:19:05,125 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:19:05,125 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:19:05,125 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:19:05,125 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:19:05,126 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:19:05,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:19:05,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 17:19:05,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:19:05,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:19:05,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:19:05,127 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 17:19:05,283 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:19:05,284 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:19:05,677 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:19:05,677 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:19:06,016 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:19:06,017 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:19:06,017 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:19:06 BoogieIcfgContainer [2024-06-21 17:19:06,017 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:19:06,019 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:19:06,019 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:19:06,022 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:19:06,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:19:02" (1/4) ... [2024-06-21 17:19:06,022 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22222e08 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:19:06, skipping insertion in model container [2024-06-21 17:19:06,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:19:04" (2/4) ... [2024-06-21 17:19:06,023 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22222e08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:19:06, skipping insertion in model container [2024-06-21 17:19:06,023 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:19:04" (3/4) ... [2024-06-21 17:19:06,023 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22222e08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:19:06, skipping insertion in model container [2024-06-21 17:19:06,023 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:19:06" (4/4) ... [2024-06-21 17:19:06,024 INFO L112 eAbstractionObserver]: Analyzing ICFG safe002_rmo.oepc.i [2024-06-21 17:19:06,038 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:19:06,038 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 17:19:06,038 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:19:06,102 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:19:06,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 17:19:06,158 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 17:19:06,158 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:19:06,160 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 57 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 17:19:06,161 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 17:19:06,163 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 17:19:06,174 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:19:06,179 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;@51184089, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:19:06,179 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 17:19:06,182 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:19:06,182 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:19:06,183 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:19:06,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:06,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:19:06,184 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 17:19:06,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:06,187 INFO L85 PathProgramCache]: Analyzing trace with hash 803580564, now seen corresponding path program 1 times [2024-06-21 17:19:06,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:06,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082803850] [2024-06-21 17:19:06,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:06,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:07,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:07,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:07,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082803850] [2024-06-21 17:19:07,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082803850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:07,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:07,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:19:07,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619255160] [2024-06-21 17:19:07,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:07,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:19:07,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:07,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:19:07,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:19:07,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:19:07,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:07,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:07,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:19:07,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:08,014 INFO L124 PetriNetUnfolderBase]: 1097/1694 cut-off events. [2024-06-21 17:19:08,015 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-06-21 17:19:08,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3423 conditions, 1694 events. 1097/1694 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8157 event pairs, 643 based on Foata normal form. 2/1662 useless extension candidates. Maximal degree in co-relation 3411. Up to 1653 conditions per place. [2024-06-21 17:19:08,025 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-21 17:19:08,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 187 flow [2024-06-21 17:19:08,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:19:08,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:19:08,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-21 17:19:08,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-21 17:19:08,035 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 70 transitions. [2024-06-21 17:19:08,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 187 flow [2024-06-21 17:19:08,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 17:19:08,039 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 17:19:08,040 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 17:19:08,042 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 17:19:08,042 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 17:19:08,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:08,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:08,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:08,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:19:08,043 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 17:19:08,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:08,044 INFO L85 PathProgramCache]: Analyzing trace with hash -853140973, now seen corresponding path program 1 times [2024-06-21 17:19:08,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:08,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930876372] [2024-06-21 17:19:08,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:08,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:10,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:10,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930876372] [2024-06-21 17:19:10,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930876372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:10,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:10,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:19:10,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087044493] [2024-06-21 17:19:10,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:10,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:19:10,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:10,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:19:10,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:19:10,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:19:10,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:10,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:10,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:19:10,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:10,828 INFO L124 PetriNetUnfolderBase]: 1088/1681 cut-off events. [2024-06-21 17:19:10,828 INFO L125 PetriNetUnfolderBase]: For 326/326 co-relation queries the response was YES. [2024-06-21 17:19:10,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3878 conditions, 1681 events. 1088/1681 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8178 event pairs, 496 based on Foata normal form. 4/1683 useless extension candidates. Maximal degree in co-relation 3866. Up to 1616 conditions per place. [2024-06-21 17:19:10,835 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-21 17:19:10,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 266 flow [2024-06-21 17:19:10,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:19:10,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:19:10,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-21 17:19:10,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-21 17:19:10,837 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 92 transitions. [2024-06-21 17:19:10,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 266 flow [2024-06-21 17:19:10,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:19:10,839 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 17:19:10,839 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 17:19:10,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 17:19:10,840 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 17:19:10,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:10,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:10,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:10,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:19:10,841 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 17:19:10,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:10,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1695353677, now seen corresponding path program 1 times [2024-06-21 17:19:10,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:10,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717731590] [2024-06-21 17:19:10,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:10,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:13,161 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 17:19:13,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:13,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717731590] [2024-06-21 17:19:13,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717731590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:13,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:13,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:19:13,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6799068] [2024-06-21 17:19:13,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:13,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:19:13,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:13,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:19:13,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:19:13,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:19:13,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:13,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:13,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:19:13,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:13,922 INFO L124 PetriNetUnfolderBase]: 1377/2089 cut-off events. [2024-06-21 17:19:13,923 INFO L125 PetriNetUnfolderBase]: For 1089/1089 co-relation queries the response was YES. [2024-06-21 17:19:13,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5323 conditions, 2089 events. 1377/2089 cut-off events. For 1089/1089 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9742 event pairs, 416 based on Foata normal form. 8/2095 useless extension candidates. Maximal degree in co-relation 5309. Up to 1964 conditions per place. [2024-06-21 17:19:13,931 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 63 selfloop transitions, 12 changer transitions 0/80 dead transitions. [2024-06-21 17:19:13,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 80 transitions, 398 flow [2024-06-21 17:19:13,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:19:13,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:19:13,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-21 17:19:13,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 17:19:13,934 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 126 transitions. [2024-06-21 17:19:13,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 80 transitions, 398 flow [2024-06-21 17:19:13,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 80 transitions, 378 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 17:19:13,936 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-21 17:19:13,936 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 17:19:13,937 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-21 17:19:13,937 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-21 17:19:13,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:13,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:13,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:13,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:19:13,938 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 17:19:13,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:13,938 INFO L85 PathProgramCache]: Analyzing trace with hash 751929379, now seen corresponding path program 1 times [2024-06-21 17:19:13,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:13,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851688683] [2024-06-21 17:19:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:13,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:15,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:15,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851688683] [2024-06-21 17:19:15,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851688683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:15,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:15,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:19:15,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054525883] [2024-06-21 17:19:15,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:15,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:19:15,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:15,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:19:15,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:19:15,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:15,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:15,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:15,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:15,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:16,095 INFO L124 PetriNetUnfolderBase]: 1369/2078 cut-off events. [2024-06-21 17:19:16,096 INFO L125 PetriNetUnfolderBase]: For 2042/2042 co-relation queries the response was YES. [2024-06-21 17:19:16,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5812 conditions, 2078 events. 1369/2078 cut-off events. For 2042/2042 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9767 event pairs, 527 based on Foata normal form. 3/2079 useless extension candidates. Maximal degree in co-relation 5795. Up to 2033 conditions per place. [2024-06-21 17:19:16,106 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 50 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2024-06-21 17:19:16,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 62 transitions, 349 flow [2024-06-21 17:19:16,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:19:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:19:16,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-21 17:19:16,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 17:19:16,108 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 87 transitions. [2024-06-21 17:19:16,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 62 transitions, 349 flow [2024-06-21 17:19:16,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 62 transitions, 322 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:19:16,111 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-21 17:19:16,111 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 17:19:16,111 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-21 17:19:16,112 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-21 17:19:16,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:16,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:16,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:16,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:19:16,112 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 17:19:16,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:16,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1834975488, now seen corresponding path program 1 times [2024-06-21 17:19:16,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:16,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076160168] [2024-06-21 17:19:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:16,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:17,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:17,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076160168] [2024-06-21 17:19:17,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076160168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:17,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:17,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:19:17,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103461308] [2024-06-21 17:19:17,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:17,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:19:17,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:17,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:19:17,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:19:17,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:17,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:17,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:17,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:17,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:18,841 INFO L124 PetriNetUnfolderBase]: 1359/2062 cut-off events. [2024-06-21 17:19:18,841 INFO L125 PetriNetUnfolderBase]: For 2948/2948 co-relation queries the response was YES. [2024-06-21 17:19:18,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6200 conditions, 2062 events. 1359/2062 cut-off events. For 2948/2948 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9508 event pairs, 566 based on Foata normal form. 4/2064 useless extension candidates. Maximal degree in co-relation 6181. Up to 2005 conditions per place. [2024-06-21 17:19:18,853 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-21 17:19:18,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 75 transitions, 430 flow [2024-06-21 17:19:18,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:19:18,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:19:18,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 17:19:18,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-21 17:19:18,855 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 101 transitions. [2024-06-21 17:19:18,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 75 transitions, 430 flow [2024-06-21 17:19:18,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 75 transitions, 403 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 17:19:18,858 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 265 flow [2024-06-21 17:19:18,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-21 17:19:18,858 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-21 17:19:18,858 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 265 flow [2024-06-21 17:19:18,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:18,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:18,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:18,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:19:18,859 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 17:19:18,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:18,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1603563804, now seen corresponding path program 1 times [2024-06-21 17:19:18,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:18,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135698744] [2024-06-21 17:19:18,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:18,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:21,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:21,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135698744] [2024-06-21 17:19:21,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135698744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:21,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:21,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:19:21,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314539920] [2024-06-21 17:19:21,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:21,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:19:21,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:21,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:19:21,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:19:21,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:21,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:21,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:21,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:21,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:22,330 INFO L124 PetriNetUnfolderBase]: 1377/2091 cut-off events. [2024-06-21 17:19:22,330 INFO L125 PetriNetUnfolderBase]: For 4101/4103 co-relation queries the response was YES. [2024-06-21 17:19:22,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6825 conditions, 2091 events. 1377/2091 cut-off events. For 4101/4103 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9786 event pairs, 507 based on Foata normal form. 5/2094 useless extension candidates. Maximal degree in co-relation 6803. Up to 1985 conditions per place. [2024-06-21 17:19:22,344 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 65 selfloop transitions, 19 changer transitions 0/88 dead transitions. [2024-06-21 17:19:22,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 88 transitions, 557 flow [2024-06-21 17:19:22,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:19:22,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:19:22,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 17:19:22,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 17:19:22,348 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 265 flow. Second operand 6 states and 111 transitions. [2024-06-21 17:19:22,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 88 transitions, 557 flow [2024-06-21 17:19:22,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 88 transitions, 551 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 17:19:22,353 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 347 flow [2024-06-21 17:19:22,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-21 17:19:22,356 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-21 17:19:22,356 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 347 flow [2024-06-21 17:19:22,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:22,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:22,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:22,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:19:22,357 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 17:19:22,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:22,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2083915140, now seen corresponding path program 2 times [2024-06-21 17:19:22,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:22,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495614665] [2024-06-21 17:19:22,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:22,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:22,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:24,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:24,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495614665] [2024-06-21 17:19:24,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495614665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:24,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:24,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:19:24,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185658997] [2024-06-21 17:19:24,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:24,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:19:24,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:24,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:19:24,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:19:24,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:24,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:24,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:24,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:24,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:25,565 INFO L124 PetriNetUnfolderBase]: 1369/2081 cut-off events. [2024-06-21 17:19:25,565 INFO L125 PetriNetUnfolderBase]: For 5638/5641 co-relation queries the response was YES. [2024-06-21 17:19:25,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7328 conditions, 2081 events. 1369/2081 cut-off events. For 5638/5641 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9773 event pairs, 510 based on Foata normal form. 5/2083 useless extension candidates. Maximal degree in co-relation 7303. Up to 1978 conditions per place. [2024-06-21 17:19:25,580 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-21 17:19:25,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 83 transitions, 563 flow [2024-06-21 17:19:25,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:19:25,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:19:25,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 17:19:25,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:19:25,583 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 347 flow. Second operand 6 states and 105 transitions. [2024-06-21 17:19:25,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 83 transitions, 563 flow [2024-06-21 17:19:25,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 83 transitions, 530 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 17:19:25,588 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 361 flow [2024-06-21 17:19:25,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-06-21 17:19:25,590 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-21 17:19:25,590 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 361 flow [2024-06-21 17:19:25,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:25,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:25,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:25,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:19:25,591 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 17:19:25,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:25,591 INFO L85 PathProgramCache]: Analyzing trace with hash 196539299, now seen corresponding path program 1 times [2024-06-21 17:19:25,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:25,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143395440] [2024-06-21 17:19:25,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:25,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:27,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:27,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:27,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143395440] [2024-06-21 17:19:27,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143395440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:27,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:27,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:19:27,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215132249] [2024-06-21 17:19:27,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:27,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:19:27,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:27,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:19:27,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:19:28,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:28,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 361 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:28,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:28,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:28,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:29,177 INFO L124 PetriNetUnfolderBase]: 1447/2205 cut-off events. [2024-06-21 17:19:29,177 INFO L125 PetriNetUnfolderBase]: For 6827/6829 co-relation queries the response was YES. [2024-06-21 17:19:29,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7901 conditions, 2205 events. 1447/2205 cut-off events. For 6827/6829 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10362 event pairs, 504 based on Foata normal form. 5/2208 useless extension candidates. Maximal degree in co-relation 7874. Up to 2064 conditions per place. [2024-06-21 17:19:29,199 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 83 selfloop transitions, 27 changer transitions 0/114 dead transitions. [2024-06-21 17:19:29,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 114 transitions, 767 flow [2024-06-21 17:19:29,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:19:29,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:19:29,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:19:29,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 17:19:29,204 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 361 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:19:29,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 114 transitions, 767 flow [2024-06-21 17:19:29,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 114 transitions, 703 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:19:29,226 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 477 flow [2024-06-21 17:19:29,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=477, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2024-06-21 17:19:29,228 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-21 17:19:29,229 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 477 flow [2024-06-21 17:19:29,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:29,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:29,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:29,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:19:29,229 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 17:19:29,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:29,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1997572411, now seen corresponding path program 2 times [2024-06-21 17:19:29,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:29,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495662483] [2024-06-21 17:19:29,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:29,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:29,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:31,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:31,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495662483] [2024-06-21 17:19:31,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495662483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:31,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:31,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:19:31,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587361600] [2024-06-21 17:19:31,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:31,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:19:31,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:31,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:19:31,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:19:31,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:31,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 477 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:31,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:31,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:31,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:32,971 INFO L124 PetriNetUnfolderBase]: 1465/2243 cut-off events. [2024-06-21 17:19:32,972 INFO L125 PetriNetUnfolderBase]: For 8828/8832 co-relation queries the response was YES. [2024-06-21 17:19:32,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8693 conditions, 2243 events. 1465/2243 cut-off events. For 8828/8832 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10662 event pairs, 486 based on Foata normal form. 7/2248 useless extension candidates. Maximal degree in co-relation 8664. Up to 2064 conditions per place. [2024-06-21 17:19:32,980 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 82 selfloop transitions, 28 changer transitions 0/114 dead transitions. [2024-06-21 17:19:32,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 114 transitions, 839 flow [2024-06-21 17:19:32,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:19:32,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:19:32,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 17:19:32,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 17:19:32,982 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 477 flow. Second operand 7 states and 127 transitions. [2024-06-21 17:19:32,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 114 transitions, 839 flow [2024-06-21 17:19:32,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 114 transitions, 793 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 17:19:32,988 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 534 flow [2024-06-21 17:19:32,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=534, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-06-21 17:19:32,989 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-21 17:19:32,989 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 534 flow [2024-06-21 17:19:32,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:32,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:32,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:32,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:19:32,990 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 17:19:32,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:32,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1997452255, now seen corresponding path program 1 times [2024-06-21 17:19:32,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:32,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003155477] [2024-06-21 17:19:32,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:32,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:35,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:35,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003155477] [2024-06-21 17:19:35,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003155477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:35,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:35,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:19:35,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602201778] [2024-06-21 17:19:35,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:35,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:19:35,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:35,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:19:35,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:19:35,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:35,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 534 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:35,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:35,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:35,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:36,627 INFO L124 PetriNetUnfolderBase]: 1693/2564 cut-off events. [2024-06-21 17:19:36,628 INFO L125 PetriNetUnfolderBase]: For 12538/12544 co-relation queries the response was YES. [2024-06-21 17:19:36,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10344 conditions, 2564 events. 1693/2564 cut-off events. For 12538/12544 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12221 event pairs, 510 based on Foata normal form. 16/2578 useless extension candidates. Maximal degree in co-relation 10314. Up to 2244 conditions per place. [2024-06-21 17:19:36,640 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 101 selfloop transitions, 36 changer transitions 0/141 dead transitions. [2024-06-21 17:19:36,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 141 transitions, 1098 flow [2024-06-21 17:19:36,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:19:36,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:19:36,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 17:19:36,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 17:19:36,643 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 534 flow. Second operand 9 states and 166 transitions. [2024-06-21 17:19:36,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 141 transitions, 1098 flow [2024-06-21 17:19:36,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 141 transitions, 1035 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 17:19:36,653 INFO L231 Difference]: Finished difference. Result has 80 places, 93 transitions, 662 flow [2024-06-21 17:19:36,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=662, PETRI_PLACES=80, PETRI_TRANSITIONS=93} [2024-06-21 17:19:36,653 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-21 17:19:36,653 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 93 transitions, 662 flow [2024-06-21 17:19:36,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:36,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:36,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:36,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:19:36,654 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 17:19:36,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:36,655 INFO L85 PathProgramCache]: Analyzing trace with hash -754381427, now seen corresponding path program 3 times [2024-06-21 17:19:36,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:36,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634091273] [2024-06-21 17:19:36,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:36,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:39,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:39,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:39,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634091273] [2024-06-21 17:19:39,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634091273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:39,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:39,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:19:39,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912483021] [2024-06-21 17:19:39,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:39,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:19:39,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:39,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:19:39,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:19:39,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:39,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 93 transitions, 662 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:39,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:39,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:39,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:40,588 INFO L124 PetriNetUnfolderBase]: 1711/2589 cut-off events. [2024-06-21 17:19:40,588 INFO L125 PetriNetUnfolderBase]: For 15953/15957 co-relation queries the response was YES. [2024-06-21 17:19:40,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11709 conditions, 2589 events. 1711/2589 cut-off events. For 15953/15957 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12277 event pairs, 537 based on Foata normal form. 5/2592 useless extension candidates. Maximal degree in co-relation 11676. Up to 2318 conditions per place. [2024-06-21 17:19:40,631 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 87 selfloop transitions, 40 changer transitions 0/131 dead transitions. [2024-06-21 17:19:40,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 131 transitions, 1142 flow [2024-06-21 17:19:40,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:19:40,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:19:40,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 17:19:40,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-21 17:19:40,634 INFO L175 Difference]: Start difference. First operand has 80 places, 93 transitions, 662 flow. Second operand 7 states and 129 transitions. [2024-06-21 17:19:40,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 131 transitions, 1142 flow [2024-06-21 17:19:40,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 131 transitions, 1085 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 17:19:40,647 INFO L231 Difference]: Finished difference. Result has 83 places, 99 transitions, 775 flow [2024-06-21 17:19:40,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=775, PETRI_PLACES=83, PETRI_TRANSITIONS=99} [2024-06-21 17:19:40,648 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-21 17:19:40,648 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 99 transitions, 775 flow [2024-06-21 17:19:40,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:40,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:40,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:40,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:19:40,649 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 17:19:40,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:40,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1228369055, now seen corresponding path program 4 times [2024-06-21 17:19:40,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:40,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096997] [2024-06-21 17:19:40,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:40,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:42,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:42,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:42,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096997] [2024-06-21 17:19:42,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:42,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:42,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:19:42,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203687702] [2024-06-21 17:19:42,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:42,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:19:42,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:42,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:19:42,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:19:42,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:42,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 99 transitions, 775 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:42,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:42,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:42,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:44,025 INFO L124 PetriNetUnfolderBase]: 1703/2578 cut-off events. [2024-06-21 17:19:44,025 INFO L125 PetriNetUnfolderBase]: For 19194/19202 co-relation queries the response was YES. [2024-06-21 17:19:44,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12189 conditions, 2578 events. 1703/2578 cut-off events. For 19194/19202 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12191 event pairs, 544 based on Foata normal form. 4/2575 useless extension candidates. Maximal degree in co-relation 12154. Up to 2311 conditions per place. [2024-06-21 17:19:44,040 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 83 selfloop transitions, 40 changer transitions 0/127 dead transitions. [2024-06-21 17:19:44,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 127 transitions, 1129 flow [2024-06-21 17:19:44,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:19:44,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:19:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 17:19:44,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 17:19:44,042 INFO L175 Difference]: Start difference. First operand has 83 places, 99 transitions, 775 flow. Second operand 7 states and 123 transitions. [2024-06-21 17:19:44,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 127 transitions, 1129 flow [2024-06-21 17:19:44,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 127 transitions, 1064 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 17:19:44,058 INFO L231 Difference]: Finished difference. Result has 87 places, 99 transitions, 798 flow [2024-06-21 17:19:44,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=798, PETRI_PLACES=87, PETRI_TRANSITIONS=99} [2024-06-21 17:19:44,059 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-21 17:19:44,059 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 99 transitions, 798 flow [2024-06-21 17:19:44,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:44,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:44,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:44,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:19:44,060 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 17:19:44,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:44,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1820083585, now seen corresponding path program 2 times [2024-06-21 17:19:44,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:44,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755522649] [2024-06-21 17:19:44,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:44,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:46,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:46,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:46,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755522649] [2024-06-21 17:19:46,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755522649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:46,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:46,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:19:46,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873156143] [2024-06-21 17:19:46,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:46,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:19:46,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:46,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:19:46,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:19:46,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:46,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 99 transitions, 798 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:46,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:46,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:46,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:47,360 INFO L124 PetriNetUnfolderBase]: 1693/2566 cut-off events. [2024-06-21 17:19:47,360 INFO L125 PetriNetUnfolderBase]: For 20489/20498 co-relation queries the response was YES. [2024-06-21 17:19:47,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12387 conditions, 2566 events. 1693/2566 cut-off events. For 20489/20498 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12075 event pairs, 536 based on Foata normal form. 10/2572 useless extension candidates. Maximal degree in co-relation 12350. Up to 2351 conditions per place. [2024-06-21 17:19:47,383 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 114 selfloop transitions, 28 changer transitions 0/146 dead transitions. [2024-06-21 17:19:47,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 146 transitions, 1361 flow [2024-06-21 17:19:47,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:19:47,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:19:47,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 17:19:47,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 17:19:47,386 INFO L175 Difference]: Start difference. First operand has 87 places, 99 transitions, 798 flow. Second operand 7 states and 122 transitions. [2024-06-21 17:19:47,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 146 transitions, 1361 flow [2024-06-21 17:19:47,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 146 transitions, 1243 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:19:47,404 INFO L231 Difference]: Finished difference. Result has 91 places, 116 transitions, 947 flow [2024-06-21 17:19:47,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=947, PETRI_PLACES=91, PETRI_TRANSITIONS=116} [2024-06-21 17:19:47,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-21 17:19:47,405 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 116 transitions, 947 flow [2024-06-21 17:19:47,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:47,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:47,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:47,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:19:47,405 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 17:19:47,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:47,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1820320735, now seen corresponding path program 3 times [2024-06-21 17:19:47,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:47,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435010085] [2024-06-21 17:19:47,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:47,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:49,755 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 17:19:49,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:49,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435010085] [2024-06-21 17:19:49,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435010085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:49,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:49,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:19:49,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083969371] [2024-06-21 17:19:49,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:49,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:19:49,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:49,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:19:49,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:19:49,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:49,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 116 transitions, 947 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:49,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:49,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:49,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:50,907 INFO L124 PetriNetUnfolderBase]: 1705/2584 cut-off events. [2024-06-21 17:19:50,907 INFO L125 PetriNetUnfolderBase]: For 23124/23143 co-relation queries the response was YES. [2024-06-21 17:19:50,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13015 conditions, 2584 events. 1705/2584 cut-off events. For 23124/23143 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12185 event pairs, 564 based on Foata normal form. 24/2604 useless extension candidates. Maximal degree in co-relation 12974. Up to 2358 conditions per place. [2024-06-21 17:19:50,921 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 111 selfloop transitions, 41 changer transitions 0/156 dead transitions. [2024-06-21 17:19:50,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 156 transitions, 1453 flow [2024-06-21 17:19:50,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:19:50,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:19:50,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:19:50,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 17:19:50,923 INFO L175 Difference]: Start difference. First operand has 91 places, 116 transitions, 947 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:19:50,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 156 transitions, 1453 flow [2024-06-21 17:19:50,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 156 transitions, 1411 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-06-21 17:19:50,944 INFO L231 Difference]: Finished difference. Result has 99 places, 123 transitions, 1092 flow [2024-06-21 17:19:50,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1092, PETRI_PLACES=99, PETRI_TRANSITIONS=123} [2024-06-21 17:19:50,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-21 17:19:50,945 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 123 transitions, 1092 flow [2024-06-21 17:19:50,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:50,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:50,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:50,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:19:50,946 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 17:19:50,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:50,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1820074657, now seen corresponding path program 1 times [2024-06-21 17:19:50,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:50,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792833061] [2024-06-21 17:19:50,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:50,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:53,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:53,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792833061] [2024-06-21 17:19:53,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792833061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:53,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:53,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:19:53,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105846049] [2024-06-21 17:19:53,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:53,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:19:53,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:53,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:19:53,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:19:53,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:53,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 123 transitions, 1092 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 17:19:53,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:53,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:53,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:54,337 INFO L124 PetriNetUnfolderBase]: 1697/2568 cut-off events. [2024-06-21 17:19:54,337 INFO L125 PetriNetUnfolderBase]: For 25854/25856 co-relation queries the response was YES. [2024-06-21 17:19:54,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13398 conditions, 2568 events. 1697/2568 cut-off events. For 25854/25856 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12004 event pairs, 539 based on Foata normal form. 4/2570 useless extension candidates. Maximal degree in co-relation 13353. Up to 2467 conditions per place. [2024-06-21 17:19:54,351 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 134 selfloop transitions, 13 changer transitions 0/151 dead transitions. [2024-06-21 17:19:54,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 151 transitions, 1476 flow [2024-06-21 17:19:54,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:19:54,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:19:54,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 17:19:54,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 17:19:54,354 INFO L175 Difference]: Start difference. First operand has 99 places, 123 transitions, 1092 flow. Second operand 7 states and 116 transitions. [2024-06-21 17:19:54,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 151 transitions, 1476 flow [2024-06-21 17:19:54,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 151 transitions, 1401 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 17:19:54,378 INFO L231 Difference]: Finished difference. Result has 102 places, 125 transitions, 1072 flow [2024-06-21 17:19:54,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1072, PETRI_PLACES=102, PETRI_TRANSITIONS=125} [2024-06-21 17:19:54,379 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-21 17:19:54,379 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 125 transitions, 1072 flow [2024-06-21 17:19:54,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 17:19:54,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:54,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:54,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:19:54,380 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 17:19:54,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:54,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1795201378, now seen corresponding path program 1 times [2024-06-21 17:19:54,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:54,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512690857] [2024-06-21 17:19:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:54,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:57,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:57,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512690857] [2024-06-21 17:19:57,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512690857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:57,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:57,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:19:57,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617487412] [2024-06-21 17:19:57,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:57,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:19:57,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:57,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:19:57,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:19:57,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:57,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 125 transitions, 1072 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 17:19:57,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:57,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:57,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:59,088 INFO L124 PetriNetUnfolderBase]: 1830/2771 cut-off events. [2024-06-21 17:19:59,089 INFO L125 PetriNetUnfolderBase]: For 30665/30673 co-relation queries the response was YES. [2024-06-21 17:19:59,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14610 conditions, 2771 events. 1830/2771 cut-off events. For 30665/30673 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13226 event pairs, 515 based on Foata normal form. 18/2787 useless extension candidates. Maximal degree in co-relation 14563. Up to 2453 conditions per place. [2024-06-21 17:19:59,107 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 139 selfloop transitions, 47 changer transitions 0/190 dead transitions. [2024-06-21 17:19:59,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 190 transitions, 1829 flow [2024-06-21 17:19:59,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:19:59,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:19:59,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-21 17:19:59,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 17:19:59,109 INFO L175 Difference]: Start difference. First operand has 102 places, 125 transitions, 1072 flow. Second operand 10 states and 177 transitions. [2024-06-21 17:19:59,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 190 transitions, 1829 flow [2024-06-21 17:19:59,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 190 transitions, 1790 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 17:19:59,137 INFO L231 Difference]: Finished difference. Result has 109 places, 140 transitions, 1325 flow [2024-06-21 17:19:59,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1033, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1325, PETRI_PLACES=109, PETRI_TRANSITIONS=140} [2024-06-21 17:19:59,137 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-21 17:19:59,137 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 140 transitions, 1325 flow [2024-06-21 17:19:59,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 17:19:59,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:59,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:59,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:19:59,138 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 17:19:59,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:59,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1910980958, now seen corresponding path program 2 times [2024-06-21 17:19:59,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:59,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302762739] [2024-06-21 17:19:59,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:59,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:01,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:01,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302762739] [2024-06-21 17:20:01,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302762739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:01,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:01,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:01,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474075964] [2024-06-21 17:20:01,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:01,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:01,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:01,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:01,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:01,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:01,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 140 transitions, 1325 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 17:20:01,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:01,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:01,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:03,349 INFO L124 PetriNetUnfolderBase]: 2126/3215 cut-off events. [2024-06-21 17:20:03,349 INFO L125 PetriNetUnfolderBase]: For 43003/43007 co-relation queries the response was YES. [2024-06-21 17:20:03,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18347 conditions, 3215 events. 2126/3215 cut-off events. For 43003/43007 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15680 event pairs, 546 based on Foata normal form. 12/3225 useless extension candidates. Maximal degree in co-relation 18297. Up to 2292 conditions per place. [2024-06-21 17:20:03,371 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 117 selfloop transitions, 93 changer transitions 0/214 dead transitions. [2024-06-21 17:20:03,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 214 transitions, 2344 flow [2024-06-21 17:20:03,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:20:03,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:20:03,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-21 17:20:03,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 17:20:03,373 INFO L175 Difference]: Start difference. First operand has 109 places, 140 transitions, 1325 flow. Second operand 10 states and 192 transitions. [2024-06-21 17:20:03,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 214 transitions, 2344 flow [2024-06-21 17:20:03,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 214 transitions, 2195 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 17:20:03,418 INFO L231 Difference]: Finished difference. Result has 116 places, 158 transitions, 1689 flow [2024-06-21 17:20:03,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1689, PETRI_PLACES=116, PETRI_TRANSITIONS=158} [2024-06-21 17:20:03,419 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-21 17:20:03,419 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 158 transitions, 1689 flow [2024-06-21 17:20:03,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 17:20:03,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:03,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:03,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:20:03,420 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 17:20:03,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:03,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1910986538, now seen corresponding path program 3 times [2024-06-21 17:20:03,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:03,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372517547] [2024-06-21 17:20:03,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:03,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:06,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:06,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372517547] [2024-06-21 17:20:06,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372517547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:06,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:06,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:06,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464677651] [2024-06-21 17:20:06,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:06,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:06,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:06,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:06,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:06,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:06,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 158 transitions, 1689 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 17:20:06,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:06,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:06,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:08,310 INFO L124 PetriNetUnfolderBase]: 2202/3321 cut-off events. [2024-06-21 17:20:08,311 INFO L125 PetriNetUnfolderBase]: For 52835/52839 co-relation queries the response was YES. [2024-06-21 17:20:08,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20650 conditions, 3321 events. 2202/3321 cut-off events. For 52835/52839 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16220 event pairs, 589 based on Foata normal form. 12/3331 useless extension candidates. Maximal degree in co-relation 20596. Up to 2347 conditions per place. [2024-06-21 17:20:08,331 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 129 selfloop transitions, 97 changer transitions 0/230 dead transitions. [2024-06-21 17:20:08,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 230 transitions, 2656 flow [2024-06-21 17:20:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:20:08,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:20:08,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-21 17:20:08,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-21 17:20:08,333 INFO L175 Difference]: Start difference. First operand has 116 places, 158 transitions, 1689 flow. Second operand 11 states and 213 transitions. [2024-06-21 17:20:08,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 230 transitions, 2656 flow [2024-06-21 17:20:08,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 230 transitions, 2495 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-21 17:20:08,388 INFO L231 Difference]: Finished difference. Result has 124 places, 166 transitions, 1876 flow [2024-06-21 17:20:08,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1544, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1876, PETRI_PLACES=124, PETRI_TRANSITIONS=166} [2024-06-21 17:20:08,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-21 17:20:08,389 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 166 transitions, 1876 flow [2024-06-21 17:20:08,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 17:20:08,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:08,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:08,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:20:08,390 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 17:20:08,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:08,390 INFO L85 PathProgramCache]: Analyzing trace with hash 194744588, now seen corresponding path program 4 times [2024-06-21 17:20:08,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:08,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105796754] [2024-06-21 17:20:08,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:08,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:10,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:10,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105796754] [2024-06-21 17:20:10,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105796754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:10,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:10,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:10,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904223241] [2024-06-21 17:20:10,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:10,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:10,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:10,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:10,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:10,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:10,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 166 transitions, 1876 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 17:20:10,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:10,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:10,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:12,664 INFO L124 PetriNetUnfolderBase]: 2192/3305 cut-off events. [2024-06-21 17:20:12,665 INFO L125 PetriNetUnfolderBase]: For 52751/52762 co-relation queries the response was YES. [2024-06-21 17:20:12,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20723 conditions, 3305 events. 2192/3305 cut-off events. For 52751/52762 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15990 event pairs, 602 based on Foata normal form. 6/3304 useless extension candidates. Maximal degree in co-relation 20666. Up to 2821 conditions per place. [2024-06-21 17:20:12,691 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 168 selfloop transitions, 55 changer transitions 0/227 dead transitions. [2024-06-21 17:20:12,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 227 transitions, 2848 flow [2024-06-21 17:20:12,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:20:12,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:20:12,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:20:12,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 17:20:12,694 INFO L175 Difference]: Start difference. First operand has 124 places, 166 transitions, 1876 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:20:12,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 227 transitions, 2848 flow [2024-06-21 17:20:12,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 227 transitions, 2593 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-21 17:20:12,753 INFO L231 Difference]: Finished difference. Result has 128 places, 193 transitions, 2212 flow [2024-06-21 17:20:12,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1672, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2212, PETRI_PLACES=128, PETRI_TRANSITIONS=193} [2024-06-21 17:20:12,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-21 17:20:12,754 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 193 transitions, 2212 flow [2024-06-21 17:20:12,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 17:20:12,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:12,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:12,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:20:12,755 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 17:20:12,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:12,755 INFO L85 PathProgramCache]: Analyzing trace with hash -595372484, now seen corresponding path program 5 times [2024-06-21 17:20:12,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:12,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685192747] [2024-06-21 17:20:12,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:12,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:15,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:15,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685192747] [2024-06-21 17:20:15,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685192747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:15,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:15,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:15,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472053472] [2024-06-21 17:20:15,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:15,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:15,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:15,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:15,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:15,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:15,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 193 transitions, 2212 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 17:20:15,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:15,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:15,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:16,985 INFO L124 PetriNetUnfolderBase]: 2256/3413 cut-off events. [2024-06-21 17:20:16,986 INFO L125 PetriNetUnfolderBase]: For 60127/60138 co-relation queries the response was YES. [2024-06-21 17:20:16,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21713 conditions, 3413 events. 2256/3413 cut-off events. For 60127/60138 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16771 event pairs, 654 based on Foata normal form. 12/3418 useless extension candidates. Maximal degree in co-relation 21652. Up to 2842 conditions per place. [2024-06-21 17:20:17,012 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 164 selfloop transitions, 84 changer transitions 0/252 dead transitions. [2024-06-21 17:20:17,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 252 transitions, 3156 flow [2024-06-21 17:20:17,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:20:17,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:20:17,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 17:20:17,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 17:20:17,015 INFO L175 Difference]: Start difference. First operand has 128 places, 193 transitions, 2212 flow. Second operand 10 states and 185 transitions. [2024-06-21 17:20:17,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 252 transitions, 3156 flow [2024-06-21 17:20:17,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 252 transitions, 3052 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-06-21 17:20:17,091 INFO L231 Difference]: Finished difference. Result has 137 places, 201 transitions, 2463 flow [2024-06-21 17:20:17,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2463, PETRI_PLACES=137, PETRI_TRANSITIONS=201} [2024-06-21 17:20:17,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-21 17:20:17,092 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 201 transitions, 2463 flow [2024-06-21 17:20:17,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 17:20:17,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:17,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:17,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:20:17,093 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 17:20:17,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:17,093 INFO L85 PathProgramCache]: Analyzing trace with hash -595366904, now seen corresponding path program 6 times [2024-06-21 17:20:17,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:17,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258925024] [2024-06-21 17:20:17,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:17,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:19,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:19,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258925024] [2024-06-21 17:20:19,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258925024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:19,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:19,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:19,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703001378] [2024-06-21 17:20:19,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:19,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:19,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:19,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:19,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:19,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:19,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 201 transitions, 2463 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 17:20:19,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:19,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:19,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:21,108 INFO L124 PetriNetUnfolderBase]: 2268/3443 cut-off events. [2024-06-21 17:20:21,109 INFO L125 PetriNetUnfolderBase]: For 64559/64570 co-relation queries the response was YES. [2024-06-21 17:20:21,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22353 conditions, 3443 events. 2268/3443 cut-off events. For 64559/64570 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17024 event pairs, 638 based on Foata normal form. 12/3448 useless extension candidates. Maximal degree in co-relation 22288. Up to 2855 conditions per place. [2024-06-21 17:20:21,135 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 153 selfloop transitions, 87 changer transitions 0/244 dead transitions. [2024-06-21 17:20:21,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 244 transitions, 3182 flow [2024-06-21 17:20:21,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:20:21,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:20:21,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:20:21,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 17:20:21,137 INFO L175 Difference]: Start difference. First operand has 137 places, 201 transitions, 2463 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:20:21,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 244 transitions, 3182 flow [2024-06-21 17:20:21,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 244 transitions, 2868 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-06-21 17:20:21,217 INFO L231 Difference]: Finished difference. Result has 138 places, 205 transitions, 2418 flow [2024-06-21 17:20:21,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2165, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2418, PETRI_PLACES=138, PETRI_TRANSITIONS=205} [2024-06-21 17:20:21,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-21 17:20:21,218 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 205 transitions, 2418 flow [2024-06-21 17:20:21,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 17:20:21,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:21,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:21,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:20:21,219 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:21,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:21,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1909587884, now seen corresponding path program 1 times [2024-06-21 17:20:21,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:21,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219633719] [2024-06-21 17:20:21,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:21,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:24,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:24,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219633719] [2024-06-21 17:20:24,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219633719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:24,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:24,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:24,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017875409] [2024-06-21 17:20:24,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:24,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:24,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:24,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:24,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:24,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:24,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 205 transitions, 2418 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 17:20:24,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:24,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:24,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:25,944 INFO L124 PetriNetUnfolderBase]: 2337/3554 cut-off events. [2024-06-21 17:20:25,945 INFO L125 PetriNetUnfolderBase]: For 69799/69807 co-relation queries the response was YES. [2024-06-21 17:20:25,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23196 conditions, 3554 events. 2337/3554 cut-off events. For 69799/69807 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 17833 event pairs, 488 based on Foata normal form. 14/3566 useless extension candidates. Maximal degree in co-relation 23130. Up to 3141 conditions per place. [2024-06-21 17:20:25,974 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 203 selfloop transitions, 50 changer transitions 0/257 dead transitions. [2024-06-21 17:20:25,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 257 transitions, 3288 flow [2024-06-21 17:20:25,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:20:25,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:20:25,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 17:20:25,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:20:25,976 INFO L175 Difference]: Start difference. First operand has 138 places, 205 transitions, 2418 flow. Second operand 9 states and 162 transitions. [2024-06-21 17:20:25,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 257 transitions, 3288 flow [2024-06-21 17:20:26,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 257 transitions, 3079 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 17:20:26,057 INFO L231 Difference]: Finished difference. Result has 141 places, 209 transitions, 2424 flow [2024-06-21 17:20:26,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2209, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2424, PETRI_PLACES=141, PETRI_TRANSITIONS=209} [2024-06-21 17:20:26,058 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-21 17:20:26,058 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 209 transitions, 2424 flow [2024-06-21 17:20:26,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 17:20:26,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:26,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:26,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:20:26,059 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 17:20:26,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:26,059 INFO L85 PathProgramCache]: Analyzing trace with hash 773664586, now seen corresponding path program 2 times [2024-06-21 17:20:26,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:26,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325908036] [2024-06-21 17:20:26,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:26,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:29,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:29,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325908036] [2024-06-21 17:20:29,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325908036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:29,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:29,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:29,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448802013] [2024-06-21 17:20:29,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:29,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:29,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:29,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:29,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:29,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:29,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 209 transitions, 2424 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 17:20:29,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:29,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:29,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:30,478 INFO L124 PetriNetUnfolderBase]: 2324/3535 cut-off events. [2024-06-21 17:20:30,478 INFO L125 PetriNetUnfolderBase]: For 72482/72490 co-relation queries the response was YES. [2024-06-21 17:20:30,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22945 conditions, 3535 events. 2324/3535 cut-off events. For 72482/72490 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17667 event pairs, 631 based on Foata normal form. 14/3547 useless extension candidates. Maximal degree in co-relation 22878. Up to 3241 conditions per place. [2024-06-21 17:20:30,503 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 198 selfloop transitions, 46 changer transitions 0/248 dead transitions. [2024-06-21 17:20:30,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 248 transitions, 3046 flow [2024-06-21 17:20:30,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:20:30,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:20:30,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:20:30,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 17:20:30,505 INFO L175 Difference]: Start difference. First operand has 141 places, 209 transitions, 2424 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:20:30,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 248 transitions, 3046 flow [2024-06-21 17:20:30,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 248 transitions, 2923 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 17:20:30,594 INFO L231 Difference]: Finished difference. Result has 144 places, 209 transitions, 2404 flow [2024-06-21 17:20:30,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2404, PETRI_PLACES=144, PETRI_TRANSITIONS=209} [2024-06-21 17:20:30,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-21 17:20:30,594 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 209 transitions, 2404 flow [2024-06-21 17:20:30,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 17:20:30,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:30,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:30,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:20:30,595 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 17:20:30,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:30,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1134897572, now seen corresponding path program 3 times [2024-06-21 17:20:30,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:30,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261164028] [2024-06-21 17:20:30,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:30,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:33,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:33,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261164028] [2024-06-21 17:20:33,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261164028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:33,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:33,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:33,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210537289] [2024-06-21 17:20:33,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:33,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:33,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:33,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:33,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:33,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:33,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 209 transitions, 2404 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 17:20:33,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:33,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:33,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:34,889 INFO L124 PetriNetUnfolderBase]: 2352/3577 cut-off events. [2024-06-21 17:20:34,889 INFO L125 PetriNetUnfolderBase]: For 77395/77399 co-relation queries the response was YES. [2024-06-21 17:20:34,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23369 conditions, 3577 events. 2352/3577 cut-off events. For 77395/77399 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17923 event pairs, 650 based on Foata normal form. 8/3583 useless extension candidates. Maximal degree in co-relation 23300. Up to 3207 conditions per place. [2024-06-21 17:20:34,917 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 180 selfloop transitions, 63 changer transitions 0/247 dead transitions. [2024-06-21 17:20:34,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 247 transitions, 3081 flow [2024-06-21 17:20:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:20:34,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:20:34,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:20:34,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 17:20:34,919 INFO L175 Difference]: Start difference. First operand has 144 places, 209 transitions, 2404 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:20:34,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 247 transitions, 3081 flow [2024-06-21 17:20:35,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 247 transitions, 2979 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 17:20:35,005 INFO L231 Difference]: Finished difference. Result has 145 places, 211 transitions, 2496 flow [2024-06-21 17:20:35,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2302, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2496, PETRI_PLACES=145, PETRI_TRANSITIONS=211} [2024-06-21 17:20:35,005 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-21 17:20:35,005 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 211 transitions, 2496 flow [2024-06-21 17:20:35,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 17:20:35,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:35,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:35,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:20:35,007 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 17:20:35,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:35,007 INFO L85 PathProgramCache]: Analyzing trace with hash 298804288, now seen corresponding path program 1 times [2024-06-21 17:20:35,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:35,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021963635] [2024-06-21 17:20:35,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:35,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:38,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:38,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021963635] [2024-06-21 17:20:38,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021963635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:38,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:38,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:38,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726334545] [2024-06-21 17:20:38,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:38,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:38,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:38,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:38,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:38,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:38,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 211 transitions, 2496 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:38,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:38,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:38,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:40,095 INFO L124 PetriNetUnfolderBase]: 2440/3686 cut-off events. [2024-06-21 17:20:40,095 INFO L125 PetriNetUnfolderBase]: For 89547/89557 co-relation queries the response was YES. [2024-06-21 17:20:40,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24331 conditions, 3686 events. 2440/3686 cut-off events. For 89547/89557 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 18434 event pairs, 604 based on Foata normal form. 28/3712 useless extension candidates. Maximal degree in co-relation 24261. Up to 3223 conditions per place. [2024-06-21 17:20:40,124 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 209 selfloop transitions, 56 changer transitions 0/269 dead transitions. [2024-06-21 17:20:40,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 269 transitions, 3358 flow [2024-06-21 17:20:40,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:20:40,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:20:40,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 17:20:40,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 17:20:40,126 INFO L175 Difference]: Start difference. First operand has 145 places, 211 transitions, 2496 flow. Second operand 10 states and 186 transitions. [2024-06-21 17:20:40,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 269 transitions, 3358 flow [2024-06-21 17:20:40,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 269 transitions, 3198 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 17:20:40,214 INFO L231 Difference]: Finished difference. Result has 149 places, 214 transitions, 2530 flow [2024-06-21 17:20:40,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2336, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2530, PETRI_PLACES=149, PETRI_TRANSITIONS=214} [2024-06-21 17:20:40,215 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-21 17:20:40,215 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 214 transitions, 2530 flow [2024-06-21 17:20:40,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:40,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:40,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:40,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:20:40,215 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 17:20:40,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:40,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1514037092, now seen corresponding path program 4 times [2024-06-21 17:20:40,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:40,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888582854] [2024-06-21 17:20:40,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:40,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:42,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:42,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888582854] [2024-06-21 17:20:42,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888582854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:42,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:42,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:42,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701794832] [2024-06-21 17:20:42,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:42,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:42,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:42,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:42,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:42,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:42,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 214 transitions, 2530 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 17:20:42,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:42,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:42,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:44,617 INFO L124 PetriNetUnfolderBase]: 2427/3696 cut-off events. [2024-06-21 17:20:44,618 INFO L125 PetriNetUnfolderBase]: For 88233/88244 co-relation queries the response was YES. [2024-06-21 17:20:44,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24510 conditions, 3696 events. 2427/3696 cut-off events. For 88233/88244 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 18589 event pairs, 667 based on Foata normal form. 8/3697 useless extension candidates. Maximal degree in co-relation 24439. Up to 3328 conditions per place. [2024-06-21 17:20:44,649 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 182 selfloop transitions, 63 changer transitions 0/249 dead transitions. [2024-06-21 17:20:44,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 249 transitions, 3211 flow [2024-06-21 17:20:44,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:20:44,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:20:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:20:44,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 17:20:44,651 INFO L175 Difference]: Start difference. First operand has 149 places, 214 transitions, 2530 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:20:44,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 249 transitions, 3211 flow [2024-06-21 17:20:44,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 249 transitions, 3049 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 17:20:44,756 INFO L231 Difference]: Finished difference. Result has 149 places, 216 transitions, 2568 flow [2024-06-21 17:20:44,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2368, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2568, PETRI_PLACES=149, PETRI_TRANSITIONS=216} [2024-06-21 17:20:44,756 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-21 17:20:44,756 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 216 transitions, 2568 flow [2024-06-21 17:20:44,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 17:20:44,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:44,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:44,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:20:44,757 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 17:20:44,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:44,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1048365042, now seen corresponding path program 2 times [2024-06-21 17:20:44,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:44,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286071992] [2024-06-21 17:20:44,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:44,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:47,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:47,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286071992] [2024-06-21 17:20:47,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286071992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:47,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:47,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:47,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821141500] [2024-06-21 17:20:47,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:47,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:47,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:47,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:47,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:47,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:47,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 216 transitions, 2568 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:47,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:47,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:47,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:49,230 INFO L124 PetriNetUnfolderBase]: 2447/3734 cut-off events. [2024-06-21 17:20:49,230 INFO L125 PetriNetUnfolderBase]: For 93808/93827 co-relation queries the response was YES. [2024-06-21 17:20:49,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24760 conditions, 3734 events. 2447/3734 cut-off events. For 93808/93827 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 18844 event pairs, 601 based on Foata normal form. 18/3748 useless extension candidates. Maximal degree in co-relation 24688. Up to 3431 conditions per place. [2024-06-21 17:20:49,261 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 218 selfloop transitions, 30 changer transitions 0/252 dead transitions. [2024-06-21 17:20:49,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 252 transitions, 3198 flow [2024-06-21 17:20:49,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:20:49,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:20:49,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:20:49,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 17:20:49,263 INFO L175 Difference]: Start difference. First operand has 149 places, 216 transitions, 2568 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:20:49,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 252 transitions, 3198 flow [2024-06-21 17:20:49,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 252 transitions, 3034 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 17:20:49,381 INFO L231 Difference]: Finished difference. Result has 151 places, 218 transitions, 2509 flow [2024-06-21 17:20:49,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2404, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2509, PETRI_PLACES=151, PETRI_TRANSITIONS=218} [2024-06-21 17:20:49,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-21 17:20:49,382 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 218 transitions, 2509 flow [2024-06-21 17:20:49,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:49,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:49,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:49,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:20:49,382 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 17:20:49,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:49,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1040024802, now seen corresponding path program 3 times [2024-06-21 17:20:49,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:49,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580330453] [2024-06-21 17:20:49,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:49,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:51,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:51,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580330453] [2024-06-21 17:20:51,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580330453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:51,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:51,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:51,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193300389] [2024-06-21 17:20:51,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:51,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:51,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:51,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:51,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:51,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:51,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 218 transitions, 2509 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:51,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:51,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:51,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:53,344 INFO L124 PetriNetUnfolderBase]: 2467/3774 cut-off events. [2024-06-21 17:20:53,344 INFO L125 PetriNetUnfolderBase]: For 98881/98900 co-relation queries the response was YES. [2024-06-21 17:20:53,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25091 conditions, 3774 events. 2467/3774 cut-off events. For 98881/98900 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 19195 event pairs, 571 based on Foata normal form. 18/3788 useless extension candidates. Maximal degree in co-relation 25018. Up to 3363 conditions per place. [2024-06-21 17:20:53,375 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 218 selfloop transitions, 37 changer transitions 0/259 dead transitions. [2024-06-21 17:20:53,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 259 transitions, 3315 flow [2024-06-21 17:20:53,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:20:53,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:20:53,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:20:53,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 17:20:53,377 INFO L175 Difference]: Start difference. First operand has 151 places, 218 transitions, 2509 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:20:53,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 259 transitions, 3315 flow [2024-06-21 17:20:53,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 259 transitions, 3228 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 17:20:53,508 INFO L231 Difference]: Finished difference. Result has 154 places, 223 transitions, 2605 flow [2024-06-21 17:20:53,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2422, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2605, PETRI_PLACES=154, PETRI_TRANSITIONS=223} [2024-06-21 17:20:53,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-21 17:20:53,509 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 223 transitions, 2605 flow [2024-06-21 17:20:53,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:53,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:53,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:53,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:20:53,510 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 17:20:53,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:53,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1276496832, now seen corresponding path program 4 times [2024-06-21 17:20:53,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:53,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192061284] [2024-06-21 17:20:53,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:53,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:56,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:56,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192061284] [2024-06-21 17:20:56,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192061284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:56,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:56,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:56,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025427341] [2024-06-21 17:20:56,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:56,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:56,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:56,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:56,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:56,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:56,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 223 transitions, 2605 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:56,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:56,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:56,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:58,232 INFO L124 PetriNetUnfolderBase]: 2527/3853 cut-off events. [2024-06-21 17:20:58,232 INFO L125 PetriNetUnfolderBase]: For 110956/110975 co-relation queries the response was YES. [2024-06-21 17:20:58,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25900 conditions, 3853 events. 2527/3853 cut-off events. For 110956/110975 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19584 event pairs, 633 based on Foata normal form. 32/3881 useless extension candidates. Maximal degree in co-relation 25825. Up to 3464 conditions per place. [2024-06-21 17:20:58,265 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 220 selfloop transitions, 45 changer transitions 0/269 dead transitions. [2024-06-21 17:20:58,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 269 transitions, 3389 flow [2024-06-21 17:20:58,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:20:58,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:20:58,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 17:20:58,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 17:20:58,267 INFO L175 Difference]: Start difference. First operand has 154 places, 223 transitions, 2605 flow. Second operand 9 states and 160 transitions. [2024-06-21 17:20:58,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 269 transitions, 3389 flow [2024-06-21 17:20:58,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 269 transitions, 3292 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 17:20:58,406 INFO L231 Difference]: Finished difference. Result has 159 places, 225 transitions, 2668 flow [2024-06-21 17:20:58,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2509, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2668, PETRI_PLACES=159, PETRI_TRANSITIONS=225} [2024-06-21 17:20:58,407 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-21 17:20:58,407 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 225 transitions, 2668 flow [2024-06-21 17:20:58,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:58,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:58,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:58,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:20:58,407 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:58,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:58,408 INFO L85 PathProgramCache]: Analyzing trace with hash -310847060, now seen corresponding path program 1 times [2024-06-21 17:20:58,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:58,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170238570] [2024-06-21 17:20:58,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:58,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:00,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:00,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170238570] [2024-06-21 17:21:00,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170238570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:00,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:00,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:21:00,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713943470] [2024-06-21 17:21:00,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:00,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:21:00,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:00,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:21:00,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:21:00,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:21:00,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 225 transitions, 2668 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 17:21:00,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:00,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:21:00,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:01,491 INFO L124 PetriNetUnfolderBase]: 2278/3546 cut-off events. [2024-06-21 17:21:01,491 INFO L125 PetriNetUnfolderBase]: For 105309/105353 co-relation queries the response was YES. [2024-06-21 17:21:01,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24498 conditions, 3546 events. 2278/3546 cut-off events. For 105309/105353 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 18552 event pairs, 614 based on Foata normal form. 16/3516 useless extension candidates. Maximal degree in co-relation 24421. Up to 3239 conditions per place. [2024-06-21 17:21:01,522 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 202 selfloop transitions, 10 changer transitions 0/239 dead transitions. [2024-06-21 17:21:01,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 239 transitions, 3150 flow [2024-06-21 17:21:01,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:21:01,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:21:01,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-21 17:21:01,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-21 17:21:01,524 INFO L175 Difference]: Start difference. First operand has 159 places, 225 transitions, 2668 flow. Second operand 5 states and 86 transitions. [2024-06-21 17:21:01,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 239 transitions, 3150 flow [2024-06-21 17:21:01,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 239 transitions, 3013 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 17:21:01,643 INFO L231 Difference]: Finished difference. Result has 157 places, 228 transitions, 2591 flow [2024-06-21 17:21:01,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2531, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2591, PETRI_PLACES=157, PETRI_TRANSITIONS=228} [2024-06-21 17:21:01,644 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-21 17:21:01,644 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 228 transitions, 2591 flow [2024-06-21 17:21:01,644 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 17:21:01,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:01,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:01,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:21:01,645 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 17:21:01,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:01,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1461021185, now seen corresponding path program 1 times [2024-06-21 17:21:01,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:01,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918009141] [2024-06-21 17:21:01,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:01,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:05,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:05,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:05,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918009141] [2024-06-21 17:21:05,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918009141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:05,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:05,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:05,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552629180] [2024-06-21 17:21:05,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:05,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:05,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:05,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:05,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:05,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:05,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 228 transitions, 2591 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:05,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:05,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:05,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:07,373 INFO L124 PetriNetUnfolderBase]: 3559/5521 cut-off events. [2024-06-21 17:21:07,374 INFO L125 PetriNetUnfolderBase]: For 211390/211398 co-relation queries the response was YES. [2024-06-21 17:21:07,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37716 conditions, 5521 events. 3559/5521 cut-off events. For 211390/211398 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 31038 event pairs, 788 based on Foata normal form. 72/5591 useless extension candidates. Maximal degree in co-relation 37638. Up to 3288 conditions per place. [2024-06-21 17:21:07,418 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 261 selfloop transitions, 61 changer transitions 0/326 dead transitions. [2024-06-21 17:21:07,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 326 transitions, 4191 flow [2024-06-21 17:21:07,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:21:07,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:21:07,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 230 transitions. [2024-06-21 17:21:07,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-21 17:21:07,420 INFO L175 Difference]: Start difference. First operand has 157 places, 228 transitions, 2591 flow. Second operand 12 states and 230 transitions. [2024-06-21 17:21:07,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 326 transitions, 4191 flow [2024-06-21 17:21:07,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 326 transitions, 4153 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 17:21:07,633 INFO L231 Difference]: Finished difference. Result has 168 places, 236 transitions, 2905 flow [2024-06-21 17:21:07,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2553, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2905, PETRI_PLACES=168, PETRI_TRANSITIONS=236} [2024-06-21 17:21:07,634 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-21 17:21:07,634 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 236 transitions, 2905 flow [2024-06-21 17:21:07,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:07,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:07,634 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 17:21:07,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:21:07,634 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 17:21:07,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:07,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1872892201, now seen corresponding path program 2 times [2024-06-21 17:21:07,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:07,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681232899] [2024-06-21 17:21:07,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:07,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:10,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:10,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681232899] [2024-06-21 17:21:10,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681232899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:10,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:10,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:10,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648571956] [2024-06-21 17:21:10,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:10,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:10,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:10,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:10,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:10,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:10,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 236 transitions, 2905 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:10,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:10,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:10,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:13,120 INFO L124 PetriNetUnfolderBase]: 3821/5967 cut-off events. [2024-06-21 17:21:13,120 INFO L125 PetriNetUnfolderBase]: For 232871/232879 co-relation queries the response was YES. [2024-06-21 17:21:13,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40800 conditions, 5967 events. 3821/5967 cut-off events. For 232871/232879 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 34297 event pairs, 1120 based on Foata normal form. 72/6037 useless extension candidates. Maximal degree in co-relation 40719. Up to 4301 conditions per place. [2024-06-21 17:21:13,174 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 251 selfloop transitions, 58 changer transitions 0/313 dead transitions. [2024-06-21 17:21:13,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 313 transitions, 4278 flow [2024-06-21 17:21:13,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:21:13,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:21:13,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-21 17:21:13,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44372294372294374 [2024-06-21 17:21:13,176 INFO L175 Difference]: Start difference. First operand has 168 places, 236 transitions, 2905 flow. Second operand 11 states and 205 transitions. [2024-06-21 17:21:13,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 313 transitions, 4278 flow [2024-06-21 17:21:13,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 313 transitions, 4099 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-21 17:21:13,488 INFO L231 Difference]: Finished difference. Result has 173 places, 241 transitions, 3017 flow [2024-06-21 17:21:13,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2742, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3017, PETRI_PLACES=173, PETRI_TRANSITIONS=241} [2024-06-21 17:21:13,489 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-21 17:21:13,489 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 241 transitions, 3017 flow [2024-06-21 17:21:13,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:13,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:13,490 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 17:21:13,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:21:13,490 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 17:21:13,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:13,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1872888481, now seen corresponding path program 3 times [2024-06-21 17:21:13,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:13,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777681445] [2024-06-21 17:21:13,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:13,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:16,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:16,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777681445] [2024-06-21 17:21:16,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777681445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:16,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:16,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:16,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961637017] [2024-06-21 17:21:16,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:16,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:16,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:16,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:16,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:16,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:16,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 241 transitions, 3017 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:16,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:16,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:16,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:18,681 INFO L124 PetriNetUnfolderBase]: 3950/6198 cut-off events. [2024-06-21 17:21:18,682 INFO L125 PetriNetUnfolderBase]: For 234860/234868 co-relation queries the response was YES. [2024-06-21 17:21:18,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40348 conditions, 6198 events. 3950/6198 cut-off events. For 234860/234868 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 36317 event pairs, 1419 based on Foata normal form. 82/6278 useless extension candidates. Maximal degree in co-relation 40264. Up to 5283 conditions per place. [2024-06-21 17:21:18,735 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 240 selfloop transitions, 61 changer transitions 0/305 dead transitions. [2024-06-21 17:21:18,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 305 transitions, 4084 flow [2024-06-21 17:21:18,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:21:18,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:21:18,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-21 17:21:18,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43073593073593075 [2024-06-21 17:21:18,737 INFO L175 Difference]: Start difference. First operand has 173 places, 241 transitions, 3017 flow. Second operand 11 states and 199 transitions. [2024-06-21 17:21:18,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 305 transitions, 4084 flow [2024-06-21 17:21:19,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 305 transitions, 3943 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 17:21:19,045 INFO L231 Difference]: Finished difference. Result has 177 places, 243 transitions, 3085 flow [2024-06-21 17:21:19,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2878, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3085, PETRI_PLACES=177, PETRI_TRANSITIONS=243} [2024-06-21 17:21:19,046 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-21 17:21:19,046 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 243 transitions, 3085 flow [2024-06-21 17:21:19,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:19,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:19,046 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 17:21:19,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:21:19,046 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:19,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:19,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1793336129, now seen corresponding path program 4 times [2024-06-21 17:21:19,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:19,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812341170] [2024-06-21 17:21:19,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:19,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:22,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:22,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812341170] [2024-06-21 17:21:22,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812341170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:22,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:22,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:22,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623910332] [2024-06-21 17:21:22,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:22,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:22,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:22,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:22,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:22,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:22,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 243 transitions, 3085 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:22,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:22,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:22,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:24,627 INFO L124 PetriNetUnfolderBase]: 4262/6732 cut-off events. [2024-06-21 17:21:24,628 INFO L125 PetriNetUnfolderBase]: For 253566/253570 co-relation queries the response was YES. [2024-06-21 17:21:24,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42877 conditions, 6732 events. 4262/6732 cut-off events. For 253566/253570 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 40399 event pairs, 1481 based on Foata normal form. 76/6806 useless extension candidates. Maximal degree in co-relation 42791. Up to 5134 conditions per place. [2024-06-21 17:21:24,678 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 171 selfloop transitions, 134 changer transitions 0/309 dead transitions. [2024-06-21 17:21:24,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 309 transitions, 4179 flow [2024-06-21 17:21:24,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:21:24,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:21:24,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-21 17:21:24,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588744588744589 [2024-06-21 17:21:24,680 INFO L175 Difference]: Start difference. First operand has 177 places, 243 transitions, 3085 flow. Second operand 11 states and 212 transitions. [2024-06-21 17:21:24,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 309 transitions, 4179 flow [2024-06-21 17:21:25,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 309 transitions, 4010 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-21 17:21:25,005 INFO L231 Difference]: Finished difference. Result has 179 places, 245 transitions, 3277 flow [2024-06-21 17:21:25,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2916, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3277, PETRI_PLACES=179, PETRI_TRANSITIONS=245} [2024-06-21 17:21:25,006 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-21 17:21:25,006 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 245 transitions, 3277 flow [2024-06-21 17:21:25,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:25,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:25,006 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 17:21:25,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:21:25,006 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 17:21:25,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:25,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1787973749, now seen corresponding path program 5 times [2024-06-21 17:21:25,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:25,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015191575] [2024-06-21 17:21:25,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:25,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:28,291 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 17:21:28,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:28,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015191575] [2024-06-21 17:21:28,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015191575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:28,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:28,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:28,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072748425] [2024-06-21 17:21:28,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:28,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:28,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:28,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:28,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:28,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:28,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 245 transitions, 3277 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:28,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:28,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:28,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:30,667 INFO L124 PetriNetUnfolderBase]: 4574/7256 cut-off events. [2024-06-21 17:21:30,667 INFO L125 PetriNetUnfolderBase]: For 272820/272824 co-relation queries the response was YES. [2024-06-21 17:21:30,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45882 conditions, 7256 events. 4574/7256 cut-off events. For 272820/272824 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 44640 event pairs, 1682 based on Foata normal form. 76/7330 useless extension candidates. Maximal degree in co-relation 45795. Up to 5658 conditions per place. [2024-06-21 17:21:30,721 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 186 selfloop transitions, 130 changer transitions 0/320 dead transitions. [2024-06-21 17:21:30,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 320 transitions, 4429 flow [2024-06-21 17:21:30,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:21:30,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:21:30,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 234 transitions. [2024-06-21 17:21:30,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 17:21:30,724 INFO L175 Difference]: Start difference. First operand has 179 places, 245 transitions, 3277 flow. Second operand 12 states and 234 transitions. [2024-06-21 17:21:30,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 320 transitions, 4429 flow [2024-06-21 17:21:31,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 320 transitions, 4102 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-21 17:21:31,022 INFO L231 Difference]: Finished difference. Result has 182 places, 247 transitions, 3307 flow [2024-06-21 17:21:31,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2950, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3307, PETRI_PLACES=182, PETRI_TRANSITIONS=247} [2024-06-21 17:21:31,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-21 17:21:31,023 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 247 transitions, 3307 flow [2024-06-21 17:21:31,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:31,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:31,023 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 17:21:31,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:21:31,023 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 17:21:31,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:31,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1787825879, now seen corresponding path program 6 times [2024-06-21 17:21:31,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:31,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280785585] [2024-06-21 17:21:31,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:31,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:34,241 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 17:21:34,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:34,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280785585] [2024-06-21 17:21:34,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280785585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:34,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:34,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:34,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166764368] [2024-06-21 17:21:34,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:34,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:34,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:34,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:34,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:34,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:34,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 247 transitions, 3307 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:34,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:34,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:34,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:36,895 INFO L124 PetriNetUnfolderBase]: 5135/8167 cut-off events. [2024-06-21 17:21:36,896 INFO L125 PetriNetUnfolderBase]: For 315343/315347 co-relation queries the response was YES. [2024-06-21 17:21:36,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51503 conditions, 8167 events. 5135/8167 cut-off events. For 315343/315347 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 51789 event pairs, 1708 based on Foata normal form. 66/8231 useless extension candidates. Maximal degree in co-relation 51415. Up to 5033 conditions per place. [2024-06-21 17:21:36,966 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 196 selfloop transitions, 133 changer transitions 0/333 dead transitions. [2024-06-21 17:21:36,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 333 transitions, 4693 flow [2024-06-21 17:21:36,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:21:36,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:21:36,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 239 transitions. [2024-06-21 17:21:36,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742063492063492 [2024-06-21 17:21:36,968 INFO L175 Difference]: Start difference. First operand has 182 places, 247 transitions, 3307 flow. Second operand 12 states and 239 transitions. [2024-06-21 17:21:36,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 333 transitions, 4693 flow [2024-06-21 17:21:37,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 333 transitions, 4372 flow, removed 34 selfloop flow, removed 10 redundant places. [2024-06-21 17:21:37,416 INFO L231 Difference]: Finished difference. Result has 185 places, 252 transitions, 3447 flow [2024-06-21 17:21:37,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2986, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3447, PETRI_PLACES=185, PETRI_TRANSITIONS=252} [2024-06-21 17:21:37,417 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-21 17:21:37,417 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 252 transitions, 3447 flow [2024-06-21 17:21:37,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:37,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:37,417 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 17:21:37,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:21:37,418 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 17:21:37,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:37,418 INFO L85 PathProgramCache]: Analyzing trace with hash 672999369, now seen corresponding path program 1 times [2024-06-21 17:21:37,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:37,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18395970] [2024-06-21 17:21:37,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:37,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:40,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:40,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18395970] [2024-06-21 17:21:40,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18395970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:40,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:40,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:21:40,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134212782] [2024-06-21 17:21:40,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:40,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:21:40,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:40,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:21:40,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:21:40,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:40,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 252 transitions, 3447 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:40,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:40,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:40,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:43,554 INFO L124 PetriNetUnfolderBase]: 5638/9028 cut-off events. [2024-06-21 17:21:43,555 INFO L125 PetriNetUnfolderBase]: For 368288/368292 co-relation queries the response was YES. [2024-06-21 17:21:43,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57507 conditions, 9028 events. 5638/9028 cut-off events. For 368288/368292 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 58934 event pairs, 1955 based on Foata normal form. 56/9082 useless extension candidates. Maximal degree in co-relation 57417. Up to 5374 conditions per place. [2024-06-21 17:21:43,631 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 179 selfloop transitions, 143 changer transitions 0/326 dead transitions. [2024-06-21 17:21:43,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 326 transitions, 4773 flow [2024-06-21 17:21:43,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:21:43,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:21:43,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-21 17:21:43,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-21 17:21:43,649 INFO L175 Difference]: Start difference. First operand has 185 places, 252 transitions, 3447 flow. Second operand 11 states and 217 transitions. [2024-06-21 17:21:43,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 326 transitions, 4773 flow [2024-06-21 17:21:44,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 326 transitions, 4458 flow, removed 53 selfloop flow, removed 9 redundant places. [2024-06-21 17:21:44,207 INFO L231 Difference]: Finished difference. Result has 187 places, 255 transitions, 3574 flow [2024-06-21 17:21:44,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3134, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3574, PETRI_PLACES=187, PETRI_TRANSITIONS=255} [2024-06-21 17:21:44,208 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-21 17:21:44,208 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 255 transitions, 3574 flow [2024-06-21 17:21:44,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:44,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:44,209 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 17:21:44,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:21:44,209 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 17:21:44,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:44,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1828977877, now seen corresponding path program 7 times [2024-06-21 17:21:44,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:44,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597639157] [2024-06-21 17:21:44,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:44,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:47,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:47,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:47,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597639157] [2024-06-21 17:21:47,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597639157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:47,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:47,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:47,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495568633] [2024-06-21 17:21:47,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:47,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:47,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:47,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:47,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:47,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:47,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 255 transitions, 3574 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:47,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:47,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:47,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:49,696 INFO L124 PetriNetUnfolderBase]: 5726/9174 cut-off events. [2024-06-21 17:21:49,696 INFO L125 PetriNetUnfolderBase]: For 360796/360807 co-relation queries the response was YES. [2024-06-21 17:21:49,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58557 conditions, 9174 events. 5726/9174 cut-off events. For 360796/360807 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 60275 event pairs, 2464 based on Foata normal form. 22/9189 useless extension candidates. Maximal degree in co-relation 58466. Up to 8447 conditions per place. [2024-06-21 17:21:49,784 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 235 selfloop transitions, 59 changer transitions 0/298 dead transitions. [2024-06-21 17:21:49,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 298 transitions, 4332 flow [2024-06-21 17:21:49,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:21:49,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:21:49,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:21:49,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 17:21:49,786 INFO L175 Difference]: Start difference. First operand has 187 places, 255 transitions, 3574 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:21:49,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 298 transitions, 4332 flow [2024-06-21 17:21:50,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 298 transitions, 4070 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-21 17:21:50,409 INFO L231 Difference]: Finished difference. Result has 189 places, 256 transitions, 3475 flow [2024-06-21 17:21:50,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3312, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3475, PETRI_PLACES=189, PETRI_TRANSITIONS=256} [2024-06-21 17:21:50,410 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-21 17:21:50,410 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 256 transitions, 3475 flow [2024-06-21 17:21:50,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:50,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:50,410 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 17:21:50,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:21:50,411 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 17:21:50,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:50,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1231775411, now seen corresponding path program 8 times [2024-06-21 17:21:50,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:50,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120539034] [2024-06-21 17:21:50,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:50,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:53,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:53,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:53,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120539034] [2024-06-21 17:21:53,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120539034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:53,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:53,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:53,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863211065] [2024-06-21 17:21:53,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:53,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:53,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:53,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:53,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:53,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:53,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 256 transitions, 3475 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:53,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:53,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:53,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:56,334 INFO L124 PetriNetUnfolderBase]: 6038/9698 cut-off events. [2024-06-21 17:21:56,335 INFO L125 PetriNetUnfolderBase]: For 417598/417609 co-relation queries the response was YES. [2024-06-21 17:21:56,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61281 conditions, 9698 events. 6038/9698 cut-off events. For 417598/417609 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 64847 event pairs, 2637 based on Foata normal form. 76/9767 useless extension candidates. Maximal degree in co-relation 61188. Up to 8519 conditions per place. [2024-06-21 17:21:56,444 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 227 selfloop transitions, 89 changer transitions 0/320 dead transitions. [2024-06-21 17:21:56,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 320 transitions, 4563 flow [2024-06-21 17:21:56,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:21:56,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:21:56,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-21 17:21:56,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4458874458874459 [2024-06-21 17:21:56,446 INFO L175 Difference]: Start difference. First operand has 189 places, 256 transitions, 3475 flow. Second operand 11 states and 206 transitions. [2024-06-21 17:21:56,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 320 transitions, 4563 flow [2024-06-21 17:21:57,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 320 transitions, 4412 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 17:21:57,051 INFO L231 Difference]: Finished difference. Result has 193 places, 258 transitions, 3615 flow [2024-06-21 17:21:57,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3328, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3615, PETRI_PLACES=193, PETRI_TRANSITIONS=258} [2024-06-21 17:21:57,051 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-21 17:21:57,051 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 258 transitions, 3615 flow [2024-06-21 17:21:57,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:57,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:57,052 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 17:21:57,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:21:57,052 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 17:21:57,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:57,053 INFO L85 PathProgramCache]: Analyzing trace with hash -922420547, now seen corresponding path program 9 times [2024-06-21 17:21:57,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:57,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345105353] [2024-06-21 17:21:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:57,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:59,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:59,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:59,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345105353] [2024-06-21 17:21:59,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345105353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:59,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:59,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:59,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708365807] [2024-06-21 17:21:59,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:59,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:59,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:59,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:59,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:59,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:59,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 258 transitions, 3615 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:59,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:59,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:59,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:02,979 INFO L124 PetriNetUnfolderBase]: 6726/10826 cut-off events. [2024-06-21 17:22:02,979 INFO L125 PetriNetUnfolderBase]: For 505427/505438 co-relation queries the response was YES. [2024-06-21 17:22:03,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70436 conditions, 10826 events. 6726/10826 cut-off events. For 505427/505438 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 73897 event pairs, 2805 based on Foata normal form. 66/10885 useless extension candidates. Maximal degree in co-relation 70342. Up to 8340 conditions per place. [2024-06-21 17:22:03,094 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 240 selfloop transitions, 91 changer transitions 0/335 dead transitions. [2024-06-21 17:22:03,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 335 transitions, 5089 flow [2024-06-21 17:22:03,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:22:03,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:22:03,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-21 17:22:03,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588744588744589 [2024-06-21 17:22:03,096 INFO L175 Difference]: Start difference. First operand has 193 places, 258 transitions, 3615 flow. Second operand 11 states and 212 transitions. [2024-06-21 17:22:03,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 335 transitions, 5089 flow [2024-06-21 17:22:04,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 335 transitions, 4838 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-21 17:22:04,036 INFO L231 Difference]: Finished difference. Result has 196 places, 263 transitions, 3760 flow [2024-06-21 17:22:04,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3364, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3760, PETRI_PLACES=196, PETRI_TRANSITIONS=263} [2024-06-21 17:22:04,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-21 17:22:04,037 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 263 transitions, 3760 flow [2024-06-21 17:22:04,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:04,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:04,038 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 17:22:04,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:22:04,038 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 17:22:04,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:04,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1661785309, now seen corresponding path program 10 times [2024-06-21 17:22:04,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:04,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344383801] [2024-06-21 17:22:04,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:04,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:07,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:07,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344383801] [2024-06-21 17:22:07,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344383801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:07,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:07,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:07,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289913414] [2024-06-21 17:22:07,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:07,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:07,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:07,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:07,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:07,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:22:07,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 263 transitions, 3760 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:07,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:07,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:22:07,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:09,876 INFO L124 PetriNetUnfolderBase]: 6855/11057 cut-off events. [2024-06-21 17:22:09,877 INFO L125 PetriNetUnfolderBase]: For 505601/505612 co-relation queries the response was YES. [2024-06-21 17:22:09,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69728 conditions, 11057 events. 6855/11057 cut-off events. For 505601/505612 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 76314 event pairs, 3089 based on Foata normal form. 76/11126 useless extension candidates. Maximal degree in co-relation 69632. Up to 9866 conditions per place. [2024-06-21 17:22:10,008 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 224 selfloop transitions, 89 changer transitions 0/317 dead transitions. [2024-06-21 17:22:10,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 317 transitions, 4747 flow [2024-06-21 17:22:10,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:22:10,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:22:10,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 17:22:10,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 17:22:10,011 INFO L175 Difference]: Start difference. First operand has 196 places, 263 transitions, 3760 flow. Second operand 10 states and 185 transitions. [2024-06-21 17:22:10,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 317 transitions, 4747 flow [2024-06-21 17:22:10,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 317 transitions, 4512 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-21 17:22:10,850 INFO L231 Difference]: Finished difference. Result has 199 places, 265 transitions, 3821 flow [2024-06-21 17:22:10,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3537, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3821, PETRI_PLACES=199, PETRI_TRANSITIONS=265} [2024-06-21 17:22:10,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-21 17:22:10,852 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 265 transitions, 3821 flow [2024-06-21 17:22:10,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:10,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:10,852 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 17:22:10,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:22:10,852 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 17:22:10,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:10,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2109773769, now seen corresponding path program 2 times [2024-06-21 17:22:10,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:10,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420755827] [2024-06-21 17:22:10,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:10,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:10,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:14,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:14,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420755827] [2024-06-21 17:22:14,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420755827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:14,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:14,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:14,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114403367] [2024-06-21 17:22:14,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:14,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:14,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:14,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:14,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:14,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:22:14,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 265 transitions, 3821 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 17:22:14,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:14,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:22:14,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:16,913 INFO L124 PetriNetUnfolderBase]: 6903/11153 cut-off events. [2024-06-21 17:22:16,913 INFO L125 PetriNetUnfolderBase]: For 468581/468592 co-relation queries the response was YES. [2024-06-21 17:22:16,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70112 conditions, 11153 events. 6903/11153 cut-off events. For 468581/468592 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 76976 event pairs, 3112 based on Foata normal form. 14/11160 useless extension candidates. Maximal degree in co-relation 70014. Up to 10296 conditions per place. [2024-06-21 17:22:17,023 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 245 selfloop transitions, 61 changer transitions 0/310 dead transitions. [2024-06-21 17:22:17,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 310 transitions, 4625 flow [2024-06-21 17:22:17,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:22:17,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:22:17,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 17:22:17,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 17:22:17,025 INFO L175 Difference]: Start difference. First operand has 199 places, 265 transitions, 3821 flow. Second operand 9 states and 159 transitions. [2024-06-21 17:22:17,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 310 transitions, 4625 flow [2024-06-21 17:22:17,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 310 transitions, 4378 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-21 17:22:17,871 INFO L231 Difference]: Finished difference. Result has 200 places, 266 transitions, 3746 flow [2024-06-21 17:22:17,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3574, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3746, PETRI_PLACES=200, PETRI_TRANSITIONS=266} [2024-06-21 17:22:17,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-21 17:22:17,872 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 266 transitions, 3746 flow [2024-06-21 17:22:17,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 17:22:17,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:17,872 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 17:22:17,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:22:17,872 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:17,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:17,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1512845227, now seen corresponding path program 3 times [2024-06-21 17:22:17,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:17,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687951757] [2024-06-21 17:22:17,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:17,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:21,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:21,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687951757] [2024-06-21 17:22:21,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687951757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:21,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:21,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:22:21,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800902736] [2024-06-21 17:22:21,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:21,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:22:21,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:21,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:22:21,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:22:21,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:22:21,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 266 transitions, 3746 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:21,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:21,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:22:21,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:24,589 INFO L124 PetriNetUnfolderBase]: 7115/11573 cut-off events. [2024-06-21 17:22:24,589 INFO L125 PetriNetUnfolderBase]: For 520705/520716 co-relation queries the response was YES. [2024-06-21 17:22:24,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71695 conditions, 11573 events. 7115/11573 cut-off events. For 520705/520716 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 81282 event pairs, 3068 based on Foata normal form. 56/11622 useless extension candidates. Maximal degree in co-relation 71596. Up to 9290 conditions per place. [2024-06-21 17:22:24,716 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 227 selfloop transitions, 95 changer transitions 0/326 dead transitions. [2024-06-21 17:22:24,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 326 transitions, 4802 flow [2024-06-21 17:22:24,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:22:24,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:22:24,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 17:22:24,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:22:24,718 INFO L175 Difference]: Start difference. First operand has 200 places, 266 transitions, 3746 flow. Second operand 10 states and 189 transitions. [2024-06-21 17:22:24,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 326 transitions, 4802 flow [2024-06-21 17:22:25,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 326 transitions, 4636 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 17:22:25,660 INFO L231 Difference]: Finished difference. Result has 203 places, 268 transitions, 3892 flow [2024-06-21 17:22:25,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3584, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3892, PETRI_PLACES=203, PETRI_TRANSITIONS=268} [2024-06-21 17:22:25,661 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-21 17:22:25,661 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 268 transitions, 3892 flow [2024-06-21 17:22:25,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:25,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:25,662 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 17:22:25,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:22:25,662 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:25,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:25,662 INFO L85 PathProgramCache]: Analyzing trace with hash 2118970539, now seen corresponding path program 4 times [2024-06-21 17:22:25,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:25,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236399879] [2024-06-21 17:22:25,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:25,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:28,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:28,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236399879] [2024-06-21 17:22:28,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236399879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:28,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:28,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:28,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705639815] [2024-06-21 17:22:28,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:28,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:28,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:28,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:28,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:28,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:22:28,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 268 transitions, 3892 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 17:22:28,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:28,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:22:28,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:31,667 INFO L124 PetriNetUnfolderBase]: 7095/11541 cut-off events. [2024-06-21 17:22:31,668 INFO L125 PetriNetUnfolderBase]: For 496164/496175 co-relation queries the response was YES. [2024-06-21 17:22:31,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71442 conditions, 11541 events. 7095/11541 cut-off events. For 496164/496175 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 80450 event pairs, 3207 based on Foata normal form. 14/11548 useless extension candidates. Maximal degree in co-relation 71342. Up to 9556 conditions per place. [2024-06-21 17:22:31,764 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 234 selfloop transitions, 73 changer transitions 0/311 dead transitions. [2024-06-21 17:22:31,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 311 transitions, 4570 flow [2024-06-21 17:22:31,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:22:31,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:22:31,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:22:31,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 17:22:31,767 INFO L175 Difference]: Start difference. First operand has 203 places, 268 transitions, 3892 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:22:31,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 311 transitions, 4570 flow [2024-06-21 17:22:32,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 311 transitions, 4292 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-21 17:22:32,532 INFO L231 Difference]: Finished difference. Result has 203 places, 267 transitions, 3678 flow [2024-06-21 17:22:32,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3528, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3678, PETRI_PLACES=203, PETRI_TRANSITIONS=267} [2024-06-21 17:22:32,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-21 17:22:32,533 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 267 transitions, 3678 flow [2024-06-21 17:22:32,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 17:22:32,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:32,534 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 17:22:32,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:22:32,534 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 17:22:32,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:32,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1498797299, now seen corresponding path program 1 times [2024-06-21 17:22:32,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:32,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721522376] [2024-06-21 17:22:32,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:32,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:35,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:35,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721522376] [2024-06-21 17:22:35,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721522376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:35,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:35,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:22:35,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120293283] [2024-06-21 17:22:35,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:35,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:22:35,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:35,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:22:35,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:22:35,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:22:35,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 267 transitions, 3678 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 17:22:35,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:35,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:22:35,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:37,907 INFO L124 PetriNetUnfolderBase]: 6789/11060 cut-off events. [2024-06-21 17:22:37,908 INFO L125 PetriNetUnfolderBase]: For 500825/500879 co-relation queries the response was YES. [2024-06-21 17:22:37,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69697 conditions, 11060 events. 6789/11060 cut-off events. For 500825/500879 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 78128 event pairs, 3220 based on Foata normal form. 20/10943 useless extension candidates. Maximal degree in co-relation 69596. Up to 10627 conditions per place. [2024-06-21 17:22:38,005 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 230 selfloop transitions, 40 changer transitions 0/297 dead transitions. [2024-06-21 17:22:38,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 297 transitions, 4412 flow [2024-06-21 17:22:38,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:22:38,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:22:38,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 17:22:38,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 17:22:38,008 INFO L175 Difference]: Start difference. First operand has 203 places, 267 transitions, 3678 flow. Second operand 7 states and 118 transitions. [2024-06-21 17:22:38,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 297 transitions, 4412 flow [2024-06-21 17:22:38,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 297 transitions, 4068 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-21 17:22:38,742 INFO L231 Difference]: Finished difference. Result has 200 places, 277 transitions, 3576 flow [2024-06-21 17:22:38,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3344, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3576, PETRI_PLACES=200, PETRI_TRANSITIONS=277} [2024-06-21 17:22:38,742 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-21 17:22:38,742 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 277 transitions, 3576 flow [2024-06-21 17:22:38,742 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 17:22:38,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:38,743 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 17:22:38,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:22:38,743 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 17:22:38,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:38,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1923327373, now seen corresponding path program 2 times [2024-06-21 17:22:38,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:38,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086527094] [2024-06-21 17:22:38,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:38,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:41,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:41,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086527094] [2024-06-21 17:22:41,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086527094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:41,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:41,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:22:41,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857056244] [2024-06-21 17:22:41,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:41,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:22:41,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:41,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:22:41,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:22:41,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:22:41,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 277 transitions, 3576 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 17:22:41,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:41,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:22:41,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:44,073 INFO L124 PetriNetUnfolderBase]: 6778/11045 cut-off events. [2024-06-21 17:22:44,073 INFO L125 PetriNetUnfolderBase]: For 512483/512532 co-relation queries the response was YES. [2024-06-21 17:22:44,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68269 conditions, 11045 events. 6778/11045 cut-off events. For 512483/512532 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 78004 event pairs, 3221 based on Foata normal form. 15/10923 useless extension candidates. Maximal degree in co-relation 68171. Up to 10601 conditions per place. [2024-06-21 17:22:44,175 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 226 selfloop transitions, 43 changer transitions 0/296 dead transitions. [2024-06-21 17:22:44,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 296 transitions, 4166 flow [2024-06-21 17:22:44,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:22:44,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:22:44,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 17:22:44,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 17:22:44,177 INFO L175 Difference]: Start difference. First operand has 200 places, 277 transitions, 3576 flow. Second operand 6 states and 106 transitions. [2024-06-21 17:22:44,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 296 transitions, 4166 flow [2024-06-21 17:22:44,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 296 transitions, 4078 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 17:22:44,973 INFO L231 Difference]: Finished difference. Result has 203 places, 277 transitions, 3593 flow [2024-06-21 17:22:44,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3488, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3593, PETRI_PLACES=203, PETRI_TRANSITIONS=277} [2024-06-21 17:22:44,974 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-21 17:22:44,974 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 277 transitions, 3593 flow [2024-06-21 17:22:44,974 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 17:22:44,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:44,975 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 17:22:44,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:22:44,975 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:44,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:44,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1923743083, now seen corresponding path program 3 times [2024-06-21 17:22:44,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:44,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68185937] [2024-06-21 17:22:44,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:44,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:47,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:47,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:47,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68185937] [2024-06-21 17:22:47,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68185937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:47,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:47,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:22:47,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053245404] [2024-06-21 17:22:47,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:47,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:22:47,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:47,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:22:47,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:22:47,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:22:47,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 277 transitions, 3593 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 17:22:47,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:47,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:22:47,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:49,871 INFO L124 PetriNetUnfolderBase]: 6765/11012 cut-off events. [2024-06-21 17:22:49,871 INFO L125 PetriNetUnfolderBase]: For 528537/528595 co-relation queries the response was YES. [2024-06-21 17:22:49,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68341 conditions, 11012 events. 6765/11012 cut-off events. For 528537/528595 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 77729 event pairs, 3162 based on Foata normal form. 17/10874 useless extension candidates. Maximal degree in co-relation 68242. Up to 10573 conditions per place. [2024-06-21 17:22:49,978 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 219 selfloop transitions, 47 changer transitions 0/293 dead transitions. [2024-06-21 17:22:49,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 293 transitions, 4197 flow [2024-06-21 17:22:49,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:22:49,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:22:49,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-21 17:22:49,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 17:22:49,980 INFO L175 Difference]: Start difference. First operand has 203 places, 277 transitions, 3593 flow. Second operand 6 states and 100 transitions. [2024-06-21 17:22:49,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 293 transitions, 4197 flow [2024-06-21 17:22:50,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 293 transitions, 4109 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 17:22:50,822 INFO L231 Difference]: Finished difference. Result has 204 places, 280 transitions, 3649 flow [2024-06-21 17:22:50,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3505, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3649, PETRI_PLACES=204, PETRI_TRANSITIONS=280} [2024-06-21 17:22:50,823 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-21 17:22:50,823 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 280 transitions, 3649 flow [2024-06-21 17:22:50,824 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 17:22:50,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:50,824 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 17:22:50,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:22:50,827 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:50,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:50,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1599852611, now seen corresponding path program 1 times [2024-06-21 17:22:50,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:50,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003926267] [2024-06-21 17:22:50,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:50,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:50,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:53,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:53,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:53,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003926267] [2024-06-21 17:22:53,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003926267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:53,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:53,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:22:53,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033271357] [2024-06-21 17:22:53,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:53,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:22:53,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:53,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:22:53,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:22:53,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:22:53,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 280 transitions, 3649 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:53,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:53,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:22:53,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:55,899 INFO L124 PetriNetUnfolderBase]: 7143/11608 cut-off events. [2024-06-21 17:22:55,899 INFO L125 PetriNetUnfolderBase]: For 535499/535501 co-relation queries the response was YES. [2024-06-21 17:22:55,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72360 conditions, 11608 events. 7143/11608 cut-off events. For 535499/535501 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 81400 event pairs, 3331 based on Foata normal form. 2/11608 useless extension candidates. Maximal degree in co-relation 72260. Up to 11225 conditions per place. [2024-06-21 17:22:56,027 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 288 selfloop transitions, 27 changer transitions 0/319 dead transitions. [2024-06-21 17:22:56,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 319 transitions, 4789 flow [2024-06-21 17:22:56,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:22:56,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:22:56,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 17:22:56,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 17:22:56,029 INFO L175 Difference]: Start difference. First operand has 204 places, 280 transitions, 3649 flow. Second operand 7 states and 124 transitions. [2024-06-21 17:22:56,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 319 transitions, 4789 flow [2024-06-21 17:22:57,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 319 transitions, 4669 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 17:22:57,039 INFO L231 Difference]: Finished difference. Result has 208 places, 291 transitions, 3866 flow [2024-06-21 17:22:57,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3529, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3866, PETRI_PLACES=208, PETRI_TRANSITIONS=291} [2024-06-21 17:22:57,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-21 17:22:57,040 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 291 transitions, 3866 flow [2024-06-21 17:22:57,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:57,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:57,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:57,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:22:57,041 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:57,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:57,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1157953803, now seen corresponding path program 2 times [2024-06-21 17:22:57,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:57,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486092948] [2024-06-21 17:22:57,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:57,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:59,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:59,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486092948] [2024-06-21 17:22:59,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486092948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:59,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:59,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:22:59,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514195966] [2024-06-21 17:22:59,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:59,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:22:59,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:59,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:22:59,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:22:59,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:22:59,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 291 transitions, 3866 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:59,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:59,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:22:59,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:01,887 INFO L124 PetriNetUnfolderBase]: 7234/11741 cut-off events. [2024-06-21 17:23:01,887 INFO L125 PetriNetUnfolderBase]: For 575389/575391 co-relation queries the response was YES. [2024-06-21 17:23:01,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75393 conditions, 11741 events. 7234/11741 cut-off events. For 575389/575391 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 82435 event pairs, 3386 based on Foata normal form. 6/11745 useless extension candidates. Maximal degree in co-relation 75291. Up to 11404 conditions per place. [2024-06-21 17:23:02,007 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 296 selfloop transitions, 24 changer transitions 0/324 dead transitions. [2024-06-21 17:23:02,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 324 transitions, 4877 flow [2024-06-21 17:23:02,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:02,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:02,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 17:23:02,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-21 17:23:02,008 INFO L175 Difference]: Start difference. First operand has 208 places, 291 transitions, 3866 flow. Second operand 8 states and 125 transitions. [2024-06-21 17:23:02,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 324 transitions, 4877 flow [2024-06-21 17:23:03,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 324 transitions, 4713 flow, removed 77 selfloop flow, removed 2 redundant places. [2024-06-21 17:23:03,118 INFO L231 Difference]: Finished difference. Result has 215 places, 302 transitions, 4001 flow [2024-06-21 17:23:03,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3738, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4001, PETRI_PLACES=215, PETRI_TRANSITIONS=302} [2024-06-21 17:23:03,119 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-21 17:23:03,119 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 302 transitions, 4001 flow [2024-06-21 17:23:03,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:03,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:03,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:03,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:23:03,119 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:03,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:03,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1723143385, now seen corresponding path program 1 times [2024-06-21 17:23:03,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:03,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634758645] [2024-06-21 17:23:03,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:03,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:05,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:05,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634758645] [2024-06-21 17:23:05,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634758645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:05,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:05,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:23:05,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674741268] [2024-06-21 17:23:05,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:05,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:23:05,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:05,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:23:05,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:23:05,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:23:05,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 302 transitions, 4001 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:05,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:05,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:23:05,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:08,318 INFO L124 PetriNetUnfolderBase]: 7208/11703 cut-off events. [2024-06-21 17:23:08,319 INFO L125 PetriNetUnfolderBase]: For 587358/587360 co-relation queries the response was YES. [2024-06-21 17:23:08,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75218 conditions, 11703 events. 7208/11703 cut-off events. For 587358/587360 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 82089 event pairs, 3387 based on Foata normal form. 6/11707 useless extension candidates. Maximal degree in co-relation 75113. Up to 11385 conditions per place. [2024-06-21 17:23:08,446 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 295 selfloop transitions, 24 changer transitions 0/323 dead transitions. [2024-06-21 17:23:08,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 323 transitions, 4693 flow [2024-06-21 17:23:08,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:08,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:08,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 17:23:08,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-21 17:23:08,447 INFO L175 Difference]: Start difference. First operand has 215 places, 302 transitions, 4001 flow. Second operand 8 states and 124 transitions. [2024-06-21 17:23:08,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 323 transitions, 4693 flow [2024-06-21 17:23:09,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 323 transitions, 4541 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-21 17:23:09,633 INFO L231 Difference]: Finished difference. Result has 219 places, 302 transitions, 3905 flow [2024-06-21 17:23:09,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3849, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3905, PETRI_PLACES=219, PETRI_TRANSITIONS=302} [2024-06-21 17:23:09,633 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-21 17:23:09,634 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 302 transitions, 3905 flow [2024-06-21 17:23:09,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:09,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:09,634 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 17:23:09,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:23:09,634 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:09,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:09,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1923749035, now seen corresponding path program 2 times [2024-06-21 17:23:09,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:09,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925808374] [2024-06-21 17:23:09,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:09,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:11,961 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 17:23:11,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:11,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925808374] [2024-06-21 17:23:11,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925808374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:11,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:11,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:23:11,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639691260] [2024-06-21 17:23:11,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:11,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:23:11,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:11,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:23:11,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:23:11,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:23:11,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 302 transitions, 3905 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:11,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:11,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:23:11,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:14,692 INFO L124 PetriNetUnfolderBase]: 7250/11756 cut-off events. [2024-06-21 17:23:14,692 INFO L125 PetriNetUnfolderBase]: For 607527/607531 co-relation queries the response was YES. [2024-06-21 17:23:14,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75960 conditions, 11756 events. 7250/11756 cut-off events. For 607527/607531 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 82276 event pairs, 3338 based on Foata normal form. 4/11758 useless extension candidates. Maximal degree in co-relation 75854. Up to 11333 conditions per place. [2024-06-21 17:23:14,826 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 289 selfloop transitions, 38 changer transitions 0/331 dead transitions. [2024-06-21 17:23:14,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 331 transitions, 4915 flow [2024-06-21 17:23:14,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:23:14,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:23:14,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 17:23:14,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 17:23:14,828 INFO L175 Difference]: Start difference. First operand has 219 places, 302 transitions, 3905 flow. Second operand 7 states and 118 transitions. [2024-06-21 17:23:14,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 331 transitions, 4915 flow [2024-06-21 17:23:15,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 331 transitions, 4867 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:23:15,812 INFO L231 Difference]: Finished difference. Result has 220 places, 308 transitions, 4063 flow [2024-06-21 17:23:15,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3857, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4063, PETRI_PLACES=220, PETRI_TRANSITIONS=308} [2024-06-21 17:23:15,812 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-21 17:23:15,813 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 308 transitions, 4063 flow [2024-06-21 17:23:15,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:15,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:15,813 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 17:23:15,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:23:15,813 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 17:23:15,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:15,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1923511699, now seen corresponding path program 3 times [2024-06-21 17:23:15,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:15,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43190916] [2024-06-21 17:23:15,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:15,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:18,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:18,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43190916] [2024-06-21 17:23:18,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43190916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:18,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:18,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:23:18,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881899208] [2024-06-21 17:23:18,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:18,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:23:18,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:18,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:23:18,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:23:18,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:23:18,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 308 transitions, 4063 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:18,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:18,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:23:18,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:21,398 INFO L124 PetriNetUnfolderBase]: 7240/11743 cut-off events. [2024-06-21 17:23:21,399 INFO L125 PetriNetUnfolderBase]: For 627228/627230 co-relation queries the response was YES. [2024-06-21 17:23:21,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76228 conditions, 11743 events. 7240/11743 cut-off events. For 627228/627230 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 82159 event pairs, 3334 based on Foata normal form. 6/11747 useless extension candidates. Maximal degree in co-relation 76120. Up to 11330 conditions per place. [2024-06-21 17:23:21,518 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 291 selfloop transitions, 40 changer transitions 0/335 dead transitions. [2024-06-21 17:23:21,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 335 transitions, 4895 flow [2024-06-21 17:23:21,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:21,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:21,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 17:23:21,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 17:23:21,519 INFO L175 Difference]: Start difference. First operand has 220 places, 308 transitions, 4063 flow. Second operand 8 states and 131 transitions. [2024-06-21 17:23:21,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 335 transitions, 4895 flow [2024-06-21 17:23:22,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 335 transitions, 4763 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-21 17:23:22,724 INFO L231 Difference]: Finished difference. Result has 226 places, 308 transitions, 4030 flow [2024-06-21 17:23:22,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3931, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4030, PETRI_PLACES=226, PETRI_TRANSITIONS=308} [2024-06-21 17:23:22,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-21 17:23:22,724 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 308 transitions, 4030 flow [2024-06-21 17:23:22,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:22,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:22,725 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 17:23:22,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:23:22,725 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:22,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:22,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1955686165, now seen corresponding path program 3 times [2024-06-21 17:23:22,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:22,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498597840] [2024-06-21 17:23:22,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:22,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:25,008 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 17:23:25,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:25,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498597840] [2024-06-21 17:23:25,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498597840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:25,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:25,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:23:25,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346107052] [2024-06-21 17:23:25,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:25,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:23:25,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:25,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:23:25,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:23:25,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:23:25,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 308 transitions, 4030 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:25,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:25,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:23:25,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:27,975 INFO L124 PetriNetUnfolderBase]: 7214/11707 cut-off events. [2024-06-21 17:23:27,975 INFO L125 PetriNetUnfolderBase]: For 641591/641593 co-relation queries the response was YES. [2024-06-21 17:23:28,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76113 conditions, 11707 events. 7214/11707 cut-off events. For 641591/641593 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 81926 event pairs, 3331 based on Foata normal form. 6/11711 useless extension candidates. Maximal degree in co-relation 76003. Up to 11311 conditions per place. [2024-06-21 17:23:28,087 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 291 selfloop transitions, 39 changer transitions 0/334 dead transitions. [2024-06-21 17:23:28,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 334 transitions, 4758 flow [2024-06-21 17:23:28,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:28,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:28,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 17:23:28,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 17:23:28,089 INFO L175 Difference]: Start difference. First operand has 226 places, 308 transitions, 4030 flow. Second operand 8 states and 131 transitions. [2024-06-21 17:23:28,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 334 transitions, 4758 flow [2024-06-21 17:23:29,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 334 transitions, 4645 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 17:23:29,264 INFO L231 Difference]: Finished difference. Result has 227 places, 308 transitions, 4009 flow [2024-06-21 17:23:29,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3917, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4009, PETRI_PLACES=227, PETRI_TRANSITIONS=308} [2024-06-21 17:23:29,264 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-21 17:23:29,264 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 308 transitions, 4009 flow [2024-06-21 17:23:29,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:29,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:29,265 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 17:23:29,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:23:29,265 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 17:23:29,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:29,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1923757963, now seen corresponding path program 1 times [2024-06-21 17:23:29,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:29,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830308461] [2024-06-21 17:23:29,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:29,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:31,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:31,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:31,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830308461] [2024-06-21 17:23:31,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830308461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:31,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:31,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:31,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981007993] [2024-06-21 17:23:31,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:31,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:31,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:31,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:31,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:31,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:23:31,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 308 transitions, 4009 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 17:23:31,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:31,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:23:31,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:34,579 INFO L124 PetriNetUnfolderBase]: 6874/11182 cut-off events. [2024-06-21 17:23:34,579 INFO L125 PetriNetUnfolderBase]: For 635161/635210 co-relation queries the response was YES. [2024-06-21 17:23:34,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73959 conditions, 11182 events. 6874/11182 cut-off events. For 635161/635210 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 78755 event pairs, 3232 based on Foata normal form. 13/11058 useless extension candidates. Maximal degree in co-relation 73848. Up to 10810 conditions per place. [2024-06-21 17:23:34,676 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 284 selfloop transitions, 12 changer transitions 0/323 dead transitions. [2024-06-21 17:23:34,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 323 transitions, 4667 flow [2024-06-21 17:23:34,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:23:34,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:23:34,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-21 17:23:34,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-21 17:23:34,678 INFO L175 Difference]: Start difference. First operand has 227 places, 308 transitions, 4009 flow. Second operand 6 states and 97 transitions. [2024-06-21 17:23:34,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 323 transitions, 4667 flow [2024-06-21 17:23:35,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 323 transitions, 4561 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 17:23:35,524 INFO L231 Difference]: Finished difference. Result has 224 places, 310 transitions, 3968 flow [2024-06-21 17:23:35,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3903, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3968, PETRI_PLACES=224, PETRI_TRANSITIONS=310} [2024-06-21 17:23:35,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-21 17:23:35,534 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 310 transitions, 3968 flow [2024-06-21 17:23:35,534 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 17:23:35,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:35,534 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 17:23:35,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 17:23:35,534 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 17:23:35,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:35,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1540546380, now seen corresponding path program 1 times [2024-06-21 17:23:35,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:35,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284196391] [2024-06-21 17:23:35,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:35,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:38,198 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 17:23:38,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:38,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284196391] [2024-06-21 17:23:38,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284196391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:38,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:38,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:38,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268861386] [2024-06-21 17:23:38,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:38,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:38,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:38,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:38,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:38,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:23:38,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 310 transitions, 3968 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:23:38,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:38,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:23:38,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:41,285 INFO L124 PetriNetUnfolderBase]: 7197/11684 cut-off events. [2024-06-21 17:23:41,285 INFO L125 PetriNetUnfolderBase]: For 628659/628661 co-relation queries the response was YES. [2024-06-21 17:23:41,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75502 conditions, 11684 events. 7197/11684 cut-off events. For 628659/628661 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 81756 event pairs, 3328 based on Foata normal form. 4/11686 useless extension candidates. Maximal degree in co-relation 75391. Up to 11264 conditions per place. [2024-06-21 17:23:41,419 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 292 selfloop transitions, 43 changer transitions 0/339 dead transitions. [2024-06-21 17:23:41,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 339 transitions, 4712 flow [2024-06-21 17:23:41,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:41,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:41,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:23:41,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 17:23:41,421 INFO L175 Difference]: Start difference. First operand has 224 places, 310 transitions, 3968 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:23:41,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 339 transitions, 4712 flow [2024-06-21 17:23:43,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 339 transitions, 4645 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 17:23:43,156 INFO L231 Difference]: Finished difference. Result has 228 places, 310 transitions, 3993 flow [2024-06-21 17:23:43,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3901, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3993, PETRI_PLACES=228, PETRI_TRANSITIONS=310} [2024-06-21 17:23:43,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-21 17:23:43,157 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 310 transitions, 3993 flow [2024-06-21 17:23:43,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:23:43,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:43,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:43,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 17:23:43,158 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 17:23:43,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:43,158 INFO L85 PathProgramCache]: Analyzing trace with hash 823778284, now seen corresponding path program 1 times [2024-06-21 17:23:43,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:43,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199185799] [2024-06-21 17:23:43,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:43,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:46,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:46,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199185799] [2024-06-21 17:23:46,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199185799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:46,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:46,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:46,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231459332] [2024-06-21 17:23:46,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:46,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:46,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:46,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:46,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:46,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:23:46,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 310 transitions, 3993 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:23:46,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:46,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:23:46,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:49,525 INFO L124 PetriNetUnfolderBase]: 7287/11783 cut-off events. [2024-06-21 17:23:49,525 INFO L125 PetriNetUnfolderBase]: For 662381/662389 co-relation queries the response was YES. [2024-06-21 17:23:49,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77482 conditions, 11783 events. 7287/11783 cut-off events. For 662381/662389 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 82219 event pairs, 3325 based on Foata normal form. 10/11791 useless extension candidates. Maximal degree in co-relation 77370. Up to 11204 conditions per place. [2024-06-21 17:23:49,666 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 294 selfloop transitions, 68 changer transitions 0/366 dead transitions. [2024-06-21 17:23:49,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 366 transitions, 5305 flow [2024-06-21 17:23:49,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:23:49,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:23:49,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 17:23:49,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:23:49,668 INFO L175 Difference]: Start difference. First operand has 228 places, 310 transitions, 3993 flow. Second operand 10 states and 175 transitions. [2024-06-21 17:23:49,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 366 transitions, 5305 flow [2024-06-21 17:23:51,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 366 transitions, 5134 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 17:23:51,171 INFO L231 Difference]: Finished difference. Result has 229 places, 319 transitions, 4152 flow [2024-06-21 17:23:51,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3822, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4152, PETRI_PLACES=229, PETRI_TRANSITIONS=319} [2024-06-21 17:23:51,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-21 17:23:51,172 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 319 transitions, 4152 flow [2024-06-21 17:23:51,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:23:51,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:51,172 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 17:23:51,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 17:23:51,173 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 17:23:51,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:51,173 INFO L85 PathProgramCache]: Analyzing trace with hash 823783120, now seen corresponding path program 1 times [2024-06-21 17:23:51,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:51,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243667479] [2024-06-21 17:23:51,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:51,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:54,008 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 17:23:54,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:54,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243667479] [2024-06-21 17:23:54,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243667479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:54,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:54,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:54,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524526249] [2024-06-21 17:23:54,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:54,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:54,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:54,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:54,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:54,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:23:54,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 319 transitions, 4152 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:23:54,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:54,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:23:54,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:56,961 INFO L124 PetriNetUnfolderBase]: 7352/11900 cut-off events. [2024-06-21 17:23:56,962 INFO L125 PetriNetUnfolderBase]: For 698611/698619 co-relation queries the response was YES. [2024-06-21 17:23:57,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79772 conditions, 11900 events. 7352/11900 cut-off events. For 698611/698619 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 83223 event pairs, 3391 based on Foata normal form. 14/11912 useless extension candidates. Maximal degree in co-relation 79661. Up to 11507 conditions per place. [2024-06-21 17:23:57,104 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 310 selfloop transitions, 45 changer transitions 3/362 dead transitions. [2024-06-21 17:23:57,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 362 transitions, 5118 flow [2024-06-21 17:23:57,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:23:57,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:23:57,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 17:23:57,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-21 17:23:57,105 INFO L175 Difference]: Start difference. First operand has 229 places, 319 transitions, 4152 flow. Second operand 9 states and 146 transitions. [2024-06-21 17:23:57,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 362 transitions, 5118 flow [2024-06-21 17:23:58,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 362 transitions, 4955 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-21 17:23:58,715 INFO L231 Difference]: Finished difference. Result has 235 places, 329 transitions, 4251 flow [2024-06-21 17:23:58,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3998, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4251, PETRI_PLACES=235, PETRI_TRANSITIONS=329} [2024-06-21 17:23:58,716 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-21 17:23:58,716 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 329 transitions, 4251 flow [2024-06-21 17:23:58,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:23:58,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:58,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:58,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 17:23:58,717 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 17:23:58,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:58,717 INFO L85 PathProgramCache]: Analyzing trace with hash 339507526, now seen corresponding path program 2 times [2024-06-21 17:23:58,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:58,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297169290] [2024-06-21 17:23:58,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:58,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:01,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:01,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:01,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297169290] [2024-06-21 17:24:01,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297169290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:01,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:01,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:24:01,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352687374] [2024-06-21 17:24:01,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:01,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:24:01,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:01,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:24:01,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:24:01,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:24:01,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 329 transitions, 4251 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:24:01,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:01,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:24:01,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:04,814 INFO L124 PetriNetUnfolderBase]: 7508/12106 cut-off events. [2024-06-21 17:24:04,814 INFO L125 PetriNetUnfolderBase]: For 735319/735327 co-relation queries the response was YES. [2024-06-21 17:24:04,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82036 conditions, 12106 events. 7508/12106 cut-off events. For 735319/735327 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 84202 event pairs, 3387 based on Foata normal form. 14/12118 useless extension candidates. Maximal degree in co-relation 81921. Up to 11607 conditions per place. [2024-06-21 17:24:04,963 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 315 selfloop transitions, 68 changer transitions 1/388 dead transitions. [2024-06-21 17:24:04,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 388 transitions, 5690 flow [2024-06-21 17:24:04,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:24:04,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:24:04,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-21 17:24:04,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-21 17:24:04,965 INFO L175 Difference]: Start difference. First operand has 235 places, 329 transitions, 4251 flow. Second operand 10 states and 161 transitions. [2024-06-21 17:24:04,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 388 transitions, 5690 flow [2024-06-21 17:24:06,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 388 transitions, 5585 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 17:24:06,649 INFO L231 Difference]: Finished difference. Result has 242 places, 352 transitions, 4658 flow [2024-06-21 17:24:06,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4160, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4658, PETRI_PLACES=242, PETRI_TRANSITIONS=352} [2024-06-21 17:24:06,650 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-21 17:24:06,650 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 352 transitions, 4658 flow [2024-06-21 17:24:06,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:24:06,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:06,650 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 17:24:06,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 17:24:06,651 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 17:24:06,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:06,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1977959068, now seen corresponding path program 3 times [2024-06-21 17:24:06,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:06,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896536782] [2024-06-21 17:24:06,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:06,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:09,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:09,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896536782] [2024-06-21 17:24:09,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896536782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:09,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:09,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:24:09,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127183257] [2024-06-21 17:24:09,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:09,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:24:09,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:09,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:24:09,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:24:09,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:24:09,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 352 transitions, 4658 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:24:09,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:09,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:24:09,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:12,918 INFO L124 PetriNetUnfolderBase]: 7490/12089 cut-off events. [2024-06-21 17:24:12,919 INFO L125 PetriNetUnfolderBase]: For 751077/751085 co-relation queries the response was YES. [2024-06-21 17:24:13,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82617 conditions, 12089 events. 7490/12089 cut-off events. For 751077/751085 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 84229 event pairs, 3380 based on Foata normal form. 10/12097 useless extension candidates. Maximal degree in co-relation 82499. Up to 11596 conditions per place. [2024-06-21 17:24:13,047 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 310 selfloop transitions, 68 changer transitions 2/384 dead transitions. [2024-06-21 17:24:13,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 384 transitions, 5649 flow [2024-06-21 17:24:13,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:24:13,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:24:13,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 17:24:13,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 17:24:13,049 INFO L175 Difference]: Start difference. First operand has 242 places, 352 transitions, 4658 flow. Second operand 9 states and 145 transitions. [2024-06-21 17:24:13,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 384 transitions, 5649 flow [2024-06-21 17:24:14,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 384 transitions, 5585 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-21 17:24:14,533 INFO L231 Difference]: Finished difference. Result has 250 places, 353 transitions, 4780 flow [2024-06-21 17:24:14,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4594, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4780, PETRI_PLACES=250, PETRI_TRANSITIONS=353} [2024-06-21 17:24:14,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-21 17:24:14,534 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 353 transitions, 4780 flow [2024-06-21 17:24:14,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:24:14,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:14,535 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 17:24:14,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 17:24:14,535 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 17:24:14,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:14,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1001160718, now seen corresponding path program 1 times [2024-06-21 17:24:14,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:14,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406595668] [2024-06-21 17:24:14,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:14,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:18,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:18,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406595668] [2024-06-21 17:24:18,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406595668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:18,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:18,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:24:18,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437115772] [2024-06-21 17:24:18,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:18,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:24:18,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:18,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:24:18,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:24:18,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:24:18,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 353 transitions, 4780 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 17:24:18,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:18,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:24:18,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:21,682 INFO L124 PetriNetUnfolderBase]: 7149/11594 cut-off events. [2024-06-21 17:24:21,683 INFO L125 PetriNetUnfolderBase]: For 802984/803041 co-relation queries the response was YES. [2024-06-21 17:24:21,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80995 conditions, 11594 events. 7149/11594 cut-off events. For 802984/803041 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 81594 event pairs, 3269 based on Foata normal form. 28/11481 useless extension candidates. Maximal degree in co-relation 80874. Up to 11028 conditions per place. [2024-06-21 17:24:21,795 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 297 selfloop transitions, 42 changer transitions 0/381 dead transitions. [2024-06-21 17:24:21,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 381 transitions, 5584 flow [2024-06-21 17:24:21,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:24:21,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:24:21,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 17:24:21,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 17:24:21,797 INFO L175 Difference]: Start difference. First operand has 250 places, 353 transitions, 4780 flow. Second operand 8 states and 133 transitions. [2024-06-21 17:24:21,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 381 transitions, 5584 flow [2024-06-21 17:24:23,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 381 transitions, 5482 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 17:24:23,399 INFO L231 Difference]: Finished difference. Result has 253 places, 355 transitions, 4807 flow [2024-06-21 17:24:23,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4678, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4807, PETRI_PLACES=253, PETRI_TRANSITIONS=355} [2024-06-21 17:24:23,401 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-21 17:24:23,401 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 355 transitions, 4807 flow [2024-06-21 17:24:23,402 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 17:24:23,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:23,402 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 17:24:23,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 17:24:23,402 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 17:24:23,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:23,403 INFO L85 PathProgramCache]: Analyzing trace with hash -751638156, now seen corresponding path program 2 times [2024-06-21 17:24:23,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:23,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839222253] [2024-06-21 17:24:23,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:23,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:26,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:26,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839222253] [2024-06-21 17:24:26,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839222253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:26,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:26,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:24:26,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522258388] [2024-06-21 17:24:26,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:26,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:24:26,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:26,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:24:26,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:24:26,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:24:26,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 355 transitions, 4807 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:24:26,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:26,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:24:26,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:29,685 INFO L124 PetriNetUnfolderBase]: 7524/12148 cut-off events. [2024-06-21 17:24:29,685 INFO L125 PetriNetUnfolderBase]: For 799678/799694 co-relation queries the response was YES. [2024-06-21 17:24:29,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83966 conditions, 12148 events. 7524/12148 cut-off events. For 799678/799694 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 84692 event pairs, 3386 based on Foata normal form. 14/12158 useless extension candidates. Maximal degree in co-relation 83844. Up to 11629 conditions per place. [2024-06-21 17:24:29,843 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 318 selfloop transitions, 70 changer transitions 0/392 dead transitions. [2024-06-21 17:24:29,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 392 transitions, 5895 flow [2024-06-21 17:24:29,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:24:29,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:24:29,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 17:24:29,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-21 17:24:29,845 INFO L175 Difference]: Start difference. First operand has 253 places, 355 transitions, 4807 flow. Second operand 9 states and 149 transitions. [2024-06-21 17:24:29,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 392 transitions, 5895 flow [2024-06-21 17:24:31,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 392 transitions, 5802 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 17:24:31,539 INFO L231 Difference]: Finished difference. Result has 256 places, 358 transitions, 4964 flow [2024-06-21 17:24:31,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4714, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4964, PETRI_PLACES=256, PETRI_TRANSITIONS=358} [2024-06-21 17:24:31,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-21 17:24:31,540 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 358 transitions, 4964 flow [2024-06-21 17:24:31,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:24:31,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:31,540 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 17:24:31,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 17:24:31,541 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 17:24:31,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:31,541 INFO L85 PathProgramCache]: Analyzing trace with hash -409219410, now seen corresponding path program 4 times [2024-06-21 17:24:31,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:31,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729936581] [2024-06-21 17:24:31,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:31,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:34,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:34,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729936581] [2024-06-21 17:24:34,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729936581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:34,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:34,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:24:34,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202665224] [2024-06-21 17:24:34,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:34,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:24:34,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:34,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:24:34,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:24:34,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:24:34,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 358 transitions, 4964 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:24:34,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:34,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:24:34,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:37,942 INFO L124 PetriNetUnfolderBase]: 7498/12121 cut-off events. [2024-06-21 17:24:37,942 INFO L125 PetriNetUnfolderBase]: For 821415/821431 co-relation queries the response was YES. [2024-06-21 17:24:38,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83912 conditions, 12121 events. 7498/12121 cut-off events. For 821415/821431 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 84650 event pairs, 3412 based on Foata normal form. 18/12135 useless extension candidates. Maximal degree in co-relation 83789. Up to 11725 conditions per place. [2024-06-21 17:24:38,086 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 327 selfloop transitions, 52 changer transitions 3/386 dead transitions. [2024-06-21 17:24:38,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 386 transitions, 5808 flow [2024-06-21 17:24:38,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:24:38,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:24:38,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 17:24:38,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 17:24:38,088 INFO L175 Difference]: Start difference. First operand has 256 places, 358 transitions, 4964 flow. Second operand 9 states and 142 transitions. [2024-06-21 17:24:38,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 386 transitions, 5808 flow [2024-06-21 17:24:40,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 386 transitions, 5547 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-21 17:24:40,091 INFO L231 Difference]: Finished difference. Result has 258 places, 356 transitions, 4786 flow [2024-06-21 17:24:40,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4703, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4786, PETRI_PLACES=258, PETRI_TRANSITIONS=356} [2024-06-21 17:24:40,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-21 17:24:40,092 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 356 transitions, 4786 flow [2024-06-21 17:24:40,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:24:40,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:40,092 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 17:24:40,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 17:24:40,092 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 17:24:40,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:40,093 INFO L85 PathProgramCache]: Analyzing trace with hash -523737006, now seen corresponding path program 3 times [2024-06-21 17:24:40,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:40,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166915483] [2024-06-21 17:24:40,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:40,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:42,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:42,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166915483] [2024-06-21 17:24:42,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166915483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:42,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:42,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:24:42,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724779680] [2024-06-21 17:24:42,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:42,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:24:42,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:42,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:24:42,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:24:42,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:24:42,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 356 transitions, 4786 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:24:42,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:42,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:24:42,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:46,149 INFO L124 PetriNetUnfolderBase]: 7548/12217 cut-off events. [2024-06-21 17:24:46,149 INFO L125 PetriNetUnfolderBase]: For 855397/855413 co-relation queries the response was YES. [2024-06-21 17:24:46,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85006 conditions, 12217 events. 7548/12217 cut-off events. For 855397/855413 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 85417 event pairs, 2881 based on Foata normal form. 14/12227 useless extension candidates. Maximal degree in co-relation 84882. Up to 11145 conditions per place. [2024-06-21 17:24:46,289 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 273 selfloop transitions, 134 changer transitions 0/411 dead transitions. [2024-06-21 17:24:46,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 411 transitions, 6440 flow [2024-06-21 17:24:46,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:24:46,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:24:46,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 17:24:46,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:24:46,291 INFO L175 Difference]: Start difference. First operand has 258 places, 356 transitions, 4786 flow. Second operand 8 states and 147 transitions. [2024-06-21 17:24:46,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 411 transitions, 6440 flow [2024-06-21 17:24:47,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 411 transitions, 6331 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 17:24:47,966 INFO L231 Difference]: Finished difference. Result has 262 places, 373 transitions, 5450 flow [2024-06-21 17:24:47,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4677, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5450, PETRI_PLACES=262, PETRI_TRANSITIONS=373} [2024-06-21 17:24:47,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-21 17:24:47,967 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 373 transitions, 5450 flow [2024-06-21 17:24:47,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:24:47,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:47,967 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 17:24:47,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 17:24:47,967 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 17:24:47,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:47,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1647525180, now seen corresponding path program 4 times [2024-06-21 17:24:47,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:47,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304266272] [2024-06-21 17:24:47,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:47,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:47,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:50,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:50,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304266272] [2024-06-21 17:24:50,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304266272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:50,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:50,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:24:50,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737964153] [2024-06-21 17:24:50,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:50,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:24:50,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:50,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:24:50,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:24:50,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:24:50,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 373 transitions, 5450 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:24:50,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:50,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:24:50,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:54,080 INFO L124 PetriNetUnfolderBase]: 7558/12231 cut-off events. [2024-06-21 17:24:54,080 INFO L125 PetriNetUnfolderBase]: For 896536/896552 co-relation queries the response was YES. [2024-06-21 17:24:54,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88043 conditions, 12231 events. 7558/12231 cut-off events. For 896536/896552 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 85529 event pairs, 2890 based on Foata normal form. 14/12241 useless extension candidates. Maximal degree in co-relation 87917. Up to 11151 conditions per place. [2024-06-21 17:24:54,256 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 267 selfloop transitions, 137 changer transitions 0/408 dead transitions. [2024-06-21 17:24:54,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 408 transitions, 6697 flow [2024-06-21 17:24:54,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:24:54,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:24:54,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:24:54,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:24:54,257 INFO L175 Difference]: Start difference. First operand has 262 places, 373 transitions, 5450 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:24:54,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 408 transitions, 6697 flow [2024-06-21 17:24:56,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 408 transitions, 6503 flow, removed 96 selfloop flow, removed 1 redundant places. [2024-06-21 17:24:56,186 INFO L231 Difference]: Finished difference. Result has 269 places, 376 transitions, 5647 flow [2024-06-21 17:24:56,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5282, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5647, PETRI_PLACES=269, PETRI_TRANSITIONS=376} [2024-06-21 17:24:56,186 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-21 17:24:56,187 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 376 transitions, 5647 flow [2024-06-21 17:24:56,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:24:56,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:56,187 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 17:24:56,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 17:24:56,187 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 17:24:56,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:56,188 INFO L85 PathProgramCache]: Analyzing trace with hash -396839250, now seen corresponding path program 5 times [2024-06-21 17:24:56,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:56,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982116365] [2024-06-21 17:24:56,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:56,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:56,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:58,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:58,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982116365] [2024-06-21 17:24:58,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982116365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:58,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:58,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:24:58,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079114594] [2024-06-21 17:24:58,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:58,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:24:58,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:58,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:24:58,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:24:58,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:24:58,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 376 transitions, 5647 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:24:58,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:58,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:24:58,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:02,258 INFO L124 PetriNetUnfolderBase]: 7791/12531 cut-off events. [2024-06-21 17:25:02,259 INFO L125 PetriNetUnfolderBase]: For 961219/961235 co-relation queries the response was YES. [2024-06-21 17:25:02,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91136 conditions, 12531 events. 7791/12531 cut-off events. For 961219/961235 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 87169 event pairs, 3429 based on Foata normal form. 18/12545 useless extension candidates. Maximal degree in co-relation 91007. Up to 11897 conditions per place. [2024-06-21 17:25:02,447 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 336 selfloop transitions, 89 changer transitions 0/429 dead transitions. [2024-06-21 17:25:02,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 429 transitions, 7324 flow [2024-06-21 17:25:02,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:25:02,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:25:02,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 17:25:02,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 17:25:02,449 INFO L175 Difference]: Start difference. First operand has 269 places, 376 transitions, 5647 flow. Second operand 9 states and 145 transitions. [2024-06-21 17:25:02,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 429 transitions, 7324 flow [2024-06-21 17:25:04,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 429 transitions, 7100 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 17:25:04,459 INFO L231 Difference]: Finished difference. Result has 276 places, 401 transitions, 6206 flow [2024-06-21 17:25:04,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5442, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6206, PETRI_PLACES=276, PETRI_TRANSITIONS=401} [2024-06-21 17:25:04,468 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-21 17:25:04,468 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 401 transitions, 6206 flow [2024-06-21 17:25:04,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:25:04,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:04,469 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 17:25:04,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 17:25:04,469 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 17:25:04,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:04,470 INFO L85 PathProgramCache]: Analyzing trace with hash -397017996, now seen corresponding path program 5 times [2024-06-21 17:25:04,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:04,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580914955] [2024-06-21 17:25:04,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:04,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:07,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:07,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580914955] [2024-06-21 17:25:07,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580914955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:07,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:07,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:25:07,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291424297] [2024-06-21 17:25:07,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:07,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:25:07,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:07,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:25:07,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:25:07,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:25:07,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 401 transitions, 6206 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:25:07,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:07,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:25:07,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:10,616 INFO L124 PetriNetUnfolderBase]: 7773/12503 cut-off events. [2024-06-21 17:25:10,617 INFO L125 PetriNetUnfolderBase]: For 979826/979842 co-relation queries the response was YES. [2024-06-21 17:25:10,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91060 conditions, 12503 events. 7773/12503 cut-off events. For 979826/979842 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 86937 event pairs, 3424 based on Foata normal form. 18/12517 useless extension candidates. Maximal degree in co-relation 90928. Up to 11886 conditions per place. [2024-06-21 17:25:10,777 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 336 selfloop transitions, 89 changer transitions 0/429 dead transitions. [2024-06-21 17:25:10,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 429 transitions, 7380 flow [2024-06-21 17:25:10,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:25:10,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:25:10,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 17:25:10,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 17:25:10,779 INFO L175 Difference]: Start difference. First operand has 276 places, 401 transitions, 6206 flow. Second operand 9 states and 145 transitions. [2024-06-21 17:25:10,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 429 transitions, 7380 flow [2024-06-21 17:25:12,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 429 transitions, 7283 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-21 17:25:12,559 INFO L231 Difference]: Finished difference. Result has 283 places, 401 transitions, 6294 flow [2024-06-21 17:25:12,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6109, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6294, PETRI_PLACES=283, PETRI_TRANSITIONS=401} [2024-06-21 17:25:12,559 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-21 17:25:12,559 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 401 transitions, 6294 flow [2024-06-21 17:25:12,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:25:12,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:12,560 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 17:25:12,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 17:25:12,560 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 17:25:12,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:12,561 INFO L85 PathProgramCache]: Analyzing trace with hash 255044026, now seen corresponding path program 6 times [2024-06-21 17:25:12,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:12,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942521154] [2024-06-21 17:25:12,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:12,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:15,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:15,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942521154] [2024-06-21 17:25:15,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942521154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:15,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:15,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:25:15,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453915090] [2024-06-21 17:25:15,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:15,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:25:15,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:15,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:25:15,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:25:15,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:25:15,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 401 transitions, 6294 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:25:15,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:15,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:25:15,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:19,367 INFO L124 PetriNetUnfolderBase]: 7747/12472 cut-off events. [2024-06-21 17:25:19,367 INFO L125 PetriNetUnfolderBase]: For 996692/996708 co-relation queries the response was YES. [2024-06-21 17:25:19,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91002 conditions, 12472 events. 7747/12472 cut-off events. For 996692/996708 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 86875 event pairs, 3470 based on Foata normal form. 18/12486 useless extension candidates. Maximal degree in co-relation 90868. Up to 12071 conditions per place. [2024-06-21 17:25:19,501 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 363 selfloop transitions, 55 changer transitions 3/425 dead transitions. [2024-06-21 17:25:19,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 425 transitions, 7204 flow [2024-06-21 17:25:19,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:25:19,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:25:19,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-21 17:25:19,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-21 17:25:19,503 INFO L175 Difference]: Start difference. First operand has 283 places, 401 transitions, 6294 flow. Second operand 9 states and 138 transitions. [2024-06-21 17:25:19,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 425 transitions, 7204 flow [2024-06-21 17:25:20,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 425 transitions, 6954 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-21 17:25:21,000 INFO L231 Difference]: Finished difference. Result has 285 places, 399 transitions, 6117 flow [2024-06-21 17:25:21,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6044, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6117, PETRI_PLACES=285, PETRI_TRANSITIONS=399} [2024-06-21 17:25:21,001 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-21 17:25:21,001 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 399 transitions, 6117 flow [2024-06-21 17:25:21,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:25:21,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:21,001 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 17:25:21,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 17:25:21,001 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 17:25:21,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:21,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1881228458, now seen corresponding path program 7 times [2024-06-21 17:25:21,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:21,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547794696] [2024-06-21 17:25:21,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:21,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:23,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:23,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547794696] [2024-06-21 17:25:23,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547794696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:23,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:23,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:25:23,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140561701] [2024-06-21 17:25:23,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:23,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:25:23,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:23,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:25:23,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:25:23,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:25:23,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 399 transitions, 6117 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:25:23,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:23,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:25:23,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:26,985 INFO L124 PetriNetUnfolderBase]: 7797/12567 cut-off events. [2024-06-21 17:25:26,986 INFO L125 PetriNetUnfolderBase]: For 1032843/1032873 co-relation queries the response was YES. [2024-06-21 17:25:27,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92162 conditions, 12567 events. 7797/12567 cut-off events. For 1032843/1032873 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 87637 event pairs, 2923 based on Foata normal form. 28/12591 useless extension candidates. Maximal degree in co-relation 92027. Up to 11467 conditions per place. [2024-06-21 17:25:27,190 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 285 selfloop transitions, 148 changer transitions 0/437 dead transitions. [2024-06-21 17:25:27,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 437 transitions, 7650 flow [2024-06-21 17:25:27,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:25:27,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:25:27,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:25:27,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 17:25:27,192 INFO L175 Difference]: Start difference. First operand has 285 places, 399 transitions, 6117 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:25:27,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 437 transitions, 7650 flow [2024-06-21 17:25:29,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 437 transitions, 7525 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 17:25:29,224 INFO L231 Difference]: Finished difference. Result has 287 places, 408 transitions, 6505 flow [2024-06-21 17:25:29,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5992, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6505, PETRI_PLACES=287, PETRI_TRANSITIONS=408} [2024-06-21 17:25:29,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-21 17:25:29,225 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 408 transitions, 6505 flow [2024-06-21 17:25:29,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:25:29,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:29,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:29,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 17:25:29,226 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 17:25:29,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:29,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1478163272, now seen corresponding path program 8 times [2024-06-21 17:25:29,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:29,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297871639] [2024-06-21 17:25:29,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:29,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:32,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:32,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297871639] [2024-06-21 17:25:32,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297871639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:32,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:32,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:25:32,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051226432] [2024-06-21 17:25:32,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:32,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:25:32,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:32,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:25:32,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:25:32,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:25:32,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 408 transitions, 6505 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:25:32,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:32,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:25:32,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:35,637 INFO L124 PetriNetUnfolderBase]: 7807/12531 cut-off events. [2024-06-21 17:25:35,638 INFO L125 PetriNetUnfolderBase]: For 1068138/1068146 co-relation queries the response was YES. [2024-06-21 17:25:35,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93367 conditions, 12531 events. 7807/12531 cut-off events. For 1068138/1068146 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 87017 event pairs, 3416 based on Foata normal form. 10/12539 useless extension candidates. Maximal degree in co-relation 93231. Up to 11887 conditions per place. [2024-06-21 17:25:35,827 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 339 selfloop transitions, 99 changer transitions 1/443 dead transitions. [2024-06-21 17:25:35,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 443 transitions, 7675 flow [2024-06-21 17:25:35,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:25:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:25:35,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 17:25:35,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 17:25:35,829 INFO L175 Difference]: Start difference. First operand has 287 places, 408 transitions, 6505 flow. Second operand 8 states and 138 transitions. [2024-06-21 17:25:35,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 443 transitions, 7675 flow [2024-06-21 17:25:38,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 443 transitions, 7415 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-21 17:25:38,057 INFO L231 Difference]: Finished difference. Result has 290 places, 410 transitions, 6494 flow [2024-06-21 17:25:38,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6246, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6494, PETRI_PLACES=290, PETRI_TRANSITIONS=410} [2024-06-21 17:25:38,058 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-21 17:25:38,058 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 410 transitions, 6494 flow [2024-06-21 17:25:38,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:25:38,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:38,059 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 17:25:38,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 17:25:38,059 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 17:25:38,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:38,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1658625518, now seen corresponding path program 9 times [2024-06-21 17:25:38,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:38,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303128040] [2024-06-21 17:25:38,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:38,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:41,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:41,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303128040] [2024-06-21 17:25:41,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303128040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:41,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:41,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:25:41,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079420361] [2024-06-21 17:25:41,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:41,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:25:41,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:41,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:25:41,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:25:41,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:25:41,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 410 transitions, 6494 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:25:41,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:41,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:25:41,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:44,623 INFO L124 PetriNetUnfolderBase]: 7669/12292 cut-off events. [2024-06-21 17:25:44,623 INFO L125 PetriNetUnfolderBase]: For 1085727/1085743 co-relation queries the response was YES. [2024-06-21 17:25:44,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92062 conditions, 12292 events. 7669/12292 cut-off events. For 1085727/1085743 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 84909 event pairs, 3377 based on Foata normal form. 18/12306 useless extension candidates. Maximal degree in co-relation 91926. Up to 11833 conditions per place. [2024-06-21 17:25:44,820 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 364 selfloop transitions, 69 changer transitions 4/441 dead transitions. [2024-06-21 17:25:44,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 441 transitions, 7458 flow [2024-06-21 17:25:44,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:25:44,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:25:44,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 17:25:44,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 17:25:44,821 INFO L175 Difference]: Start difference. First operand has 290 places, 410 transitions, 6494 flow. Second operand 8 states and 136 transitions. [2024-06-21 17:25:44,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 441 transitions, 7458 flow [2024-06-21 17:25:47,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 441 transitions, 7293 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 17:25:47,355 INFO L231 Difference]: Finished difference. Result has 293 places, 407 transitions, 6435 flow [2024-06-21 17:25:47,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6329, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6435, PETRI_PLACES=293, PETRI_TRANSITIONS=407} [2024-06-21 17:25:47,356 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-21 17:25:47,356 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 407 transitions, 6435 flow [2024-06-21 17:25:47,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:25:47,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:47,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:47,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 17:25:47,356 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 17:25:47,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:47,357 INFO L85 PathProgramCache]: Analyzing trace with hash 260960350, now seen corresponding path program 6 times [2024-06-21 17:25:47,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:47,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002962804] [2024-06-21 17:25:47,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:47,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:49,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:49,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002962804] [2024-06-21 17:25:49,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002962804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:49,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:49,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:25:49,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689496883] [2024-06-21 17:25:49,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:49,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:25:49,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:49,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:25:49,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:25:49,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:25:49,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 407 transitions, 6435 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:25:49,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:49,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:25:49,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:53,173 INFO L124 PetriNetUnfolderBase]: 7315/11724 cut-off events. [2024-06-21 17:25:53,173 INFO L125 PetriNetUnfolderBase]: For 1098606/1098622 co-relation queries the response was YES. [2024-06-21 17:25:53,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89512 conditions, 11724 events. 7315/11724 cut-off events. For 1098606/1098622 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 80060 event pairs, 2725 based on Foata normal form. 18/11738 useless extension candidates. Maximal degree in co-relation 89375. Up to 10719 conditions per place. [2024-06-21 17:25:53,321 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 283 selfloop transitions, 157 changer transitions 0/444 dead transitions. [2024-06-21 17:25:53,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 444 transitions, 7685 flow [2024-06-21 17:25:53,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:25:53,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:25:53,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 17:25:53,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 17:25:53,322 INFO L175 Difference]: Start difference. First operand has 293 places, 407 transitions, 6435 flow. Second operand 9 states and 156 transitions. [2024-06-21 17:25:53,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 444 transitions, 7685 flow [2024-06-21 17:25:55,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 444 transitions, 7431 flow, removed 43 selfloop flow, removed 10 redundant places. [2024-06-21 17:25:55,439 INFO L231 Difference]: Finished difference. Result has 292 places, 407 transitions, 6519 flow [2024-06-21 17:25:55,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6189, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6519, PETRI_PLACES=292, PETRI_TRANSITIONS=407} [2024-06-21 17:25:55,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-21 17:25:55,439 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 407 transitions, 6519 flow [2024-06-21 17:25:55,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:25:55,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:55,440 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 17:25:55,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 17:25:55,440 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 17:25:55,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:55,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1481493998, now seen corresponding path program 10 times [2024-06-21 17:25:55,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:55,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560981581] [2024-06-21 17:25:55,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:55,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:58,299 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 17:25:58,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:58,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560981581] [2024-06-21 17:25:58,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560981581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:58,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:58,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:25:58,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423590477] [2024-06-21 17:25:58,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:58,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:25:58,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:58,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:25:58,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:25:58,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:25:58,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 407 transitions, 6519 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:25:58,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:58,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:25:58,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:01,463 INFO L124 PetriNetUnfolderBase]: 7181/11431 cut-off events. [2024-06-21 17:26:01,463 INFO L125 PetriNetUnfolderBase]: For 1061417/1061425 co-relation queries the response was YES. [2024-06-21 17:26:01,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87691 conditions, 11431 events. 7181/11431 cut-off events. For 1061417/1061425 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 77300 event pairs, 3053 based on Foata normal form. 14/11443 useless extension candidates. Maximal degree in co-relation 87556. Up to 10897 conditions per place. [2024-06-21 17:26:01,854 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 344 selfloop transitions, 97 changer transitions 3/448 dead transitions. [2024-06-21 17:26:01,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 448 transitions, 7523 flow [2024-06-21 17:26:01,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:26:01,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:26:01,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 17:26:01,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 17:26:01,856 INFO L175 Difference]: Start difference. First operand has 292 places, 407 transitions, 6519 flow. Second operand 9 states and 160 transitions. [2024-06-21 17:26:01,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 448 transitions, 7523 flow [2024-06-21 17:26:03,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 448 transitions, 7175 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 17:26:03,785 INFO L231 Difference]: Finished difference. Result has 292 places, 404 transitions, 6328 flow [2024-06-21 17:26:03,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6171, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6328, PETRI_PLACES=292, PETRI_TRANSITIONS=404} [2024-06-21 17:26:03,786 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-21 17:26:03,786 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 404 transitions, 6328 flow [2024-06-21 17:26:03,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:26:03,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:03,786 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 17:26:03,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 17:26:03,787 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 17:26:03,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:03,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1886942378, now seen corresponding path program 11 times [2024-06-21 17:26:03,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:03,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94813732] [2024-06-21 17:26:03,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:03,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:06,538 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 17:26:06,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:06,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94813732] [2024-06-21 17:26:06,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94813732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:06,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:06,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:26:06,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871891934] [2024-06-21 17:26:06,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:06,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:26:06,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:06,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:26:06,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:26:06,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:26:06,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 404 transitions, 6328 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:26:06,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:06,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:26:06,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:09,463 INFO L124 PetriNetUnfolderBase]: 6855/10913 cut-off events. [2024-06-21 17:26:09,463 INFO L125 PetriNetUnfolderBase]: For 1044838/1044868 co-relation queries the response was YES. [2024-06-21 17:26:09,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85127 conditions, 10913 events. 6855/10913 cut-off events. For 1044838/1044868 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 73041 event pairs, 2597 based on Foata normal form. 28/10937 useless extension candidates. Maximal degree in co-relation 84993. Up to 9982 conditions per place. [2024-06-21 17:26:09,633 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 281 selfloop transitions, 149 changer transitions 0/434 dead transitions. [2024-06-21 17:26:09,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 434 transitions, 7580 flow [2024-06-21 17:26:09,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:26:09,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:26:09,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 17:26:09,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 17:26:09,635 INFO L175 Difference]: Start difference. First operand has 292 places, 404 transitions, 6328 flow. Second operand 8 states and 134 transitions. [2024-06-21 17:26:09,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 434 transitions, 7580 flow [2024-06-21 17:26:11,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 434 transitions, 7316 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-21 17:26:11,918 INFO L231 Difference]: Finished difference. Result has 290 places, 407 transitions, 6434 flow [2024-06-21 17:26:11,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6076, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6434, PETRI_PLACES=290, PETRI_TRANSITIONS=407} [2024-06-21 17:26:11,919 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-21 17:26:11,919 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 407 transitions, 6434 flow [2024-06-21 17:26:11,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:26:11,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:11,919 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 17:26:11,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 17:26:11,920 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 17:26:11,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:11,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1659041228, now seen corresponding path program 12 times [2024-06-21 17:26:11,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:11,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32531568] [2024-06-21 17:26:11,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:11,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:11,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:14,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:14,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32531568] [2024-06-21 17:26:14,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32531568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:14,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:14,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:26:14,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493046303] [2024-06-21 17:26:14,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:14,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:26:14,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:14,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:26:14,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:26:14,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:26:14,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 407 transitions, 6434 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:26:14,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:14,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:26:14,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:17,780 INFO L124 PetriNetUnfolderBase]: 6837/10886 cut-off events. [2024-06-21 17:26:17,780 INFO L125 PetriNetUnfolderBase]: For 982732/982748 co-relation queries the response was YES. [2024-06-21 17:26:17,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83952 conditions, 10886 events. 6837/10886 cut-off events. For 982732/982748 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 72857 event pairs, 2561 based on Foata normal form. 18/10900 useless extension candidates. Maximal degree in co-relation 83818. Up to 9971 conditions per place. [2024-06-21 17:26:17,906 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 282 selfloop transitions, 154 changer transitions 0/440 dead transitions. [2024-06-21 17:26:17,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 440 transitions, 7652 flow [2024-06-21 17:26:17,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:26:17,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:26:17,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 17:26:17,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 17:26:17,907 INFO L175 Difference]: Start difference. First operand has 290 places, 407 transitions, 6434 flow. Second operand 9 states and 152 transitions. [2024-06-21 17:26:17,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 440 transitions, 7652 flow [2024-06-21 17:26:19,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 440 transitions, 7375 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 17:26:19,844 INFO L231 Difference]: Finished difference. Result has 294 places, 407 transitions, 6477 flow [2024-06-21 17:26:19,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6157, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6477, PETRI_PLACES=294, PETRI_TRANSITIONS=407} [2024-06-21 17:26:19,845 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-21 17:26:19,845 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 407 transitions, 6477 flow [2024-06-21 17:26:19,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 17:26:19,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:19,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:19,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 17:26:19,846 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 17:26:19,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:19,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1881237386, now seen corresponding path program 2 times [2024-06-21 17:26:19,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:19,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431654223] [2024-06-21 17:26:19,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:19,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:23,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:23,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431654223] [2024-06-21 17:26:23,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431654223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:23,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:23,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:23,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686636391] [2024-06-21 17:26:23,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:23,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:23,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:23,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:23,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:23,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:26:23,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 407 transitions, 6477 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 17:26:23,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:23,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:26:23,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:26,348 INFO L124 PetriNetUnfolderBase]: 6606/10555 cut-off events. [2024-06-21 17:26:26,349 INFO L125 PetriNetUnfolderBase]: For 1019737/1019767 co-relation queries the response was YES. [2024-06-21 17:26:26,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82169 conditions, 10555 events. 6606/10555 cut-off events. For 1019737/1019767 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 71337 event pairs, 2769 based on Foata normal form. 23/10497 useless extension candidates. Maximal degree in co-relation 82034. Up to 9981 conditions per place. [2024-06-21 17:26:26,462 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 316 selfloop transitions, 50 changer transitions 0/427 dead transitions. [2024-06-21 17:26:26,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 427 transitions, 7303 flow [2024-06-21 17:26:26,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:26:26,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:26:26,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 17:26:26,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-21 17:26:26,463 INFO L175 Difference]: Start difference. First operand has 294 places, 407 transitions, 6477 flow. Second operand 7 states and 115 transitions. [2024-06-21 17:26:26,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 427 transitions, 7303 flow [2024-06-21 17:26:28,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 427 transitions, 6841 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 17:26:28,383 INFO L231 Difference]: Finished difference. Result has 292 places, 408 transitions, 6145 flow [2024-06-21 17:26:28,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6015, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6145, PETRI_PLACES=292, PETRI_TRANSITIONS=408} [2024-06-21 17:26:28,384 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-21 17:26:28,384 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 408 transitions, 6145 flow [2024-06-21 17:26:28,384 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 17:26:28,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:28,384 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 17:26:28,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 17:26:28,384 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 17:26:28,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:28,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1895522186, now seen corresponding path program 3 times [2024-06-21 17:26:28,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:28,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652822063] [2024-06-21 17:26:28,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:28,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:31,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:31,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652822063] [2024-06-21 17:26:31,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652822063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:31,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:31,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:31,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543338140] [2024-06-21 17:26:31,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:31,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:31,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:31,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:31,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:32,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:26:32,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 408 transitions, 6145 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 17:26:32,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:32,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:26:32,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:34,941 INFO L124 PetriNetUnfolderBase]: 6689/10691 cut-off events. [2024-06-21 17:26:34,941 INFO L125 PetriNetUnfolderBase]: For 1033914/1033946 co-relation queries the response was YES. [2024-06-21 17:26:35,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83183 conditions, 10691 events. 6689/10691 cut-off events. For 1033914/1033946 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 72409 event pairs, 2786 based on Foata normal form. 19/10622 useless extension candidates. Maximal degree in co-relation 83047. Up to 9917 conditions per place. [2024-06-21 17:26:35,062 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 316 selfloop transitions, 56 changer transitions 0/433 dead transitions. [2024-06-21 17:26:35,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 433 transitions, 7175 flow [2024-06-21 17:26:35,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:26:35,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:26:35,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 17:26:35,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-21 17:26:35,064 INFO L175 Difference]: Start difference. First operand has 292 places, 408 transitions, 6145 flow. Second operand 7 states and 117 transitions. [2024-06-21 17:26:35,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 433 transitions, 7175 flow [2024-06-21 17:26:36,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 433 transitions, 7065 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 17:26:36,990 INFO L231 Difference]: Finished difference. Result has 295 places, 411 transitions, 6236 flow [2024-06-21 17:26:36,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6035, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6236, PETRI_PLACES=295, PETRI_TRANSITIONS=411} [2024-06-21 17:26:36,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-21 17:26:36,991 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 411 transitions, 6236 flow [2024-06-21 17:26:36,991 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 17:26:36,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:36,991 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 17:26:36,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 17:26:36,991 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 17:26:36,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:36,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1481740076, now seen corresponding path program 4 times [2024-06-21 17:26:36,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:36,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528241017] [2024-06-21 17:26:36,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:36,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:37,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:41,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:41,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528241017] [2024-06-21 17:26:41,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528241017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:41,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:41,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:41,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558876206] [2024-06-21 17:26:41,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:41,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:41,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:41,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:41,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:41,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:26:41,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 411 transitions, 6236 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 17:26:41,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:41,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:26:41,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:44,282 INFO L124 PetriNetUnfolderBase]: 6646/10637 cut-off events. [2024-06-21 17:26:44,283 INFO L125 PetriNetUnfolderBase]: For 1046832/1046863 co-relation queries the response was YES. [2024-06-21 17:26:44,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82271 conditions, 10637 events. 6646/10637 cut-off events. For 1046832/1046863 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 72050 event pairs, 2853 based on Foata normal form. 26/10583 useless extension candidates. Maximal degree in co-relation 82133. Up to 9992 conditions per place. [2024-06-21 17:26:44,409 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 328 selfloop transitions, 47 changer transitions 0/436 dead transitions. [2024-06-21 17:26:44,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 436 transitions, 7076 flow [2024-06-21 17:26:44,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:26:44,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:26:44,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 17:26:44,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 17:26:44,410 INFO L175 Difference]: Start difference. First operand has 295 places, 411 transitions, 6236 flow. Second operand 7 states and 121 transitions. [2024-06-21 17:26:44,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 436 transitions, 7076 flow [2024-06-21 17:26:46,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 436 transitions, 6975 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 17:26:46,500 INFO L231 Difference]: Finished difference. Result has 298 places, 411 transitions, 6241 flow [2024-06-21 17:26:46,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6135, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6241, PETRI_PLACES=298, PETRI_TRANSITIONS=411} [2024-06-21 17:26:46,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-21 17:26:46,501 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 411 transitions, 6241 flow [2024-06-21 17:26:46,501 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 17:26:46,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:46,501 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 17:26:46,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 17:26:46,501 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 17:26:46,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:46,502 INFO L85 PathProgramCache]: Analyzing trace with hash -515157198, now seen corresponding path program 1 times [2024-06-21 17:26:46,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:46,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034797871] [2024-06-21 17:26:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:46,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:49,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:49,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034797871] [2024-06-21 17:26:49,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034797871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:49,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:49,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:26:49,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838716742] [2024-06-21 17:26:49,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:49,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:26:49,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:49,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:26:49,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:26:49,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:26:49,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 411 transitions, 6241 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:49,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:49,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:26:49,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:52,833 INFO L124 PetriNetUnfolderBase]: 7014/11159 cut-off events. [2024-06-21 17:26:52,833 INFO L125 PetriNetUnfolderBase]: For 1074731/1074733 co-relation queries the response was YES. [2024-06-21 17:26:52,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86889 conditions, 11159 events. 7014/11159 cut-off events. For 1074731/1074733 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 74896 event pairs, 2794 based on Foata normal form. 2/11159 useless extension candidates. Maximal degree in co-relation 86750. Up to 10684 conditions per place. [2024-06-21 17:26:52,958 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 401 selfloop transitions, 48 changer transitions 0/453 dead transitions. [2024-06-21 17:26:52,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 453 transitions, 7571 flow [2024-06-21 17:26:52,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:26:52,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:26:52,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:26:52,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 17:26:52,959 INFO L175 Difference]: Start difference. First operand has 298 places, 411 transitions, 6241 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:26:52,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 453 transitions, 7571 flow [2024-06-21 17:26:54,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 453 transitions, 7466 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:26:54,977 INFO L231 Difference]: Finished difference. Result has 300 places, 415 transitions, 6417 flow [2024-06-21 17:26:54,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6136, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6417, PETRI_PLACES=300, PETRI_TRANSITIONS=415} [2024-06-21 17:26:54,980 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-21 17:26:54,980 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 415 transitions, 6417 flow [2024-06-21 17:26:54,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:54,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:54,981 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 17:26:54,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 17:26:54,981 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 17:26:54,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:54,981 INFO L85 PathProgramCache]: Analyzing trace with hash -512415558, now seen corresponding path program 2 times [2024-06-21 17:26:54,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:54,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121820091] [2024-06-21 17:26:54,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:54,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:57,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:57,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:57,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121820091] [2024-06-21 17:26:57,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121820091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:57,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:57,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:26:57,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162414033] [2024-06-21 17:26:57,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:57,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:26:57,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:57,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:26:57,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:26:57,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:26:57,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 415 transitions, 6417 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:57,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:57,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:26:57,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:01,105 INFO L124 PetriNetUnfolderBase]: 7022/11171 cut-off events. [2024-06-21 17:27:01,105 INFO L125 PetriNetUnfolderBase]: For 1107491/1107493 co-relation queries the response was YES. [2024-06-21 17:27:01,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87650 conditions, 11171 events. 7022/11171 cut-off events. For 1107491/1107493 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 74945 event pairs, 2828 based on Foata normal form. 2/11171 useless extension candidates. Maximal degree in co-relation 87510. Up to 10821 conditions per place. [2024-06-21 17:27:01,272 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 396 selfloop transitions, 45 changer transitions 0/445 dead transitions. [2024-06-21 17:27:01,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 445 transitions, 7463 flow [2024-06-21 17:27:01,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:27:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:27:01,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 17:27:01,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 17:27:01,274 INFO L175 Difference]: Start difference. First operand has 300 places, 415 transitions, 6417 flow. Second operand 8 states and 133 transitions. [2024-06-21 17:27:01,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 445 transitions, 7463 flow [2024-06-21 17:27:03,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 445 transitions, 7304 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-21 17:27:03,484 INFO L231 Difference]: Finished difference. Result has 304 places, 417 transitions, 6449 flow [2024-06-21 17:27:03,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6268, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6449, PETRI_PLACES=304, PETRI_TRANSITIONS=417} [2024-06-21 17:27:03,484 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-21 17:27:03,484 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 417 transitions, 6449 flow [2024-06-21 17:27:03,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:03,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:03,485 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 17:27:03,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 17:27:03,485 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 17:27:03,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:03,485 INFO L85 PathProgramCache]: Analyzing trace with hash -397009068, now seen corresponding path program 3 times [2024-06-21 17:27:03,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:03,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565986588] [2024-06-21 17:27:03,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:03,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:06,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:06,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565986588] [2024-06-21 17:27:06,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565986588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:06,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:06,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:06,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960756381] [2024-06-21 17:27:06,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:06,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:06,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:06,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:06,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:06,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:27:06,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 417 transitions, 6449 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:06,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:06,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:27:06,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:09,806 INFO L124 PetriNetUnfolderBase]: 7074/11251 cut-off events. [2024-06-21 17:27:09,806 INFO L125 PetriNetUnfolderBase]: For 1168553/1168555 co-relation queries the response was YES. [2024-06-21 17:27:09,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88704 conditions, 11251 events. 7074/11251 cut-off events. For 1168553/1168555 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 75655 event pairs, 2948 based on Foata normal form. 14/11263 useless extension candidates. Maximal degree in co-relation 88562. Up to 10957 conditions per place. [2024-06-21 17:27:09,953 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 417 selfloop transitions, 26 changer transitions 0/447 dead transitions. [2024-06-21 17:27:09,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 447 transitions, 7515 flow [2024-06-21 17:27:09,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:27:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:27:09,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 17:27:09,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-21 17:27:09,955 INFO L175 Difference]: Start difference. First operand has 304 places, 417 transitions, 6449 flow. Second operand 9 states and 140 transitions. [2024-06-21 17:27:09,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 447 transitions, 7515 flow [2024-06-21 17:27:12,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 447 transitions, 7354 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 17:27:12,394 INFO L231 Difference]: Finished difference. Result has 307 places, 419 transitions, 6436 flow [2024-06-21 17:27:12,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6288, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6436, PETRI_PLACES=307, PETRI_TRANSITIONS=419} [2024-06-21 17:27:12,394 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-21 17:27:12,394 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 419 transitions, 6436 flow [2024-06-21 17:27:12,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:12,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:12,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:12,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 17:27:12,395 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 17:27:12,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:12,395 INFO L85 PathProgramCache]: Analyzing trace with hash 439453612, now seen corresponding path program 1 times [2024-06-21 17:27:12,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:12,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501943878] [2024-06-21 17:27:12,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:12,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:15,663 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 17:27:15,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:15,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501943878] [2024-06-21 17:27:15,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501943878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:15,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:15,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:15,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846977557] [2024-06-21 17:27:15,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:15,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:15,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:15,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:15,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:15,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:27:15,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 419 transitions, 6436 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:15,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:15,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:27:15,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:19,049 INFO L124 PetriNetUnfolderBase]: 7126/11331 cut-off events. [2024-06-21 17:27:19,049 INFO L125 PetriNetUnfolderBase]: For 1199667/1199669 co-relation queries the response was YES. [2024-06-21 17:27:19,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89499 conditions, 11331 events. 7126/11331 cut-off events. For 1199667/1199669 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 76253 event pairs, 2956 based on Foata normal form. 14/11343 useless extension candidates. Maximal degree in co-relation 89356. Up to 11037 conditions per place. [2024-06-21 17:27:19,187 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 419 selfloop transitions, 26 changer transitions 0/449 dead transitions. [2024-06-21 17:27:19,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 449 transitions, 7472 flow [2024-06-21 17:27:19,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:27:19,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:27:19,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 17:27:19,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-21 17:27:19,188 INFO L175 Difference]: Start difference. First operand has 307 places, 419 transitions, 6436 flow. Second operand 9 states and 140 transitions. [2024-06-21 17:27:19,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 449 transitions, 7472 flow [2024-06-21 17:27:21,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 449 transitions, 7356 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 17:27:21,364 INFO L231 Difference]: Finished difference. Result has 309 places, 421 transitions, 6434 flow [2024-06-21 17:27:21,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6320, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6434, PETRI_PLACES=309, PETRI_TRANSITIONS=421} [2024-06-21 17:27:21,365 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-21 17:27:21,365 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 421 transitions, 6434 flow [2024-06-21 17:27:21,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:21,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:21,365 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 17:27:21,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 17:27:21,366 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 17:27:21,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:21,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1658871410, now seen corresponding path program 4 times [2024-06-21 17:27:21,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:21,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886063136] [2024-06-21 17:27:21,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:21,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:24,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:24,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886063136] [2024-06-21 17:27:24,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886063136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:24,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:24,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:24,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48687056] [2024-06-21 17:27:24,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:24,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:24,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:24,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:24,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:24,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:27:24,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 421 transitions, 6434 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:24,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:24,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:27:24,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:27,717 INFO L124 PetriNetUnfolderBase]: 7093/11284 cut-off events. [2024-06-21 17:27:27,717 INFO L125 PetriNetUnfolderBase]: For 1194558/1194560 co-relation queries the response was YES. [2024-06-21 17:27:27,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88504 conditions, 11284 events. 7093/11284 cut-off events. For 1194558/1194560 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 75713 event pairs, 2789 based on Foata normal form. 14/11296 useless extension candidates. Maximal degree in co-relation 88360. Up to 10826 conditions per place. [2024-06-21 17:27:27,902 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 408 selfloop transitions, 46 changer transitions 0/458 dead transitions. [2024-06-21 17:27:27,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 458 transitions, 7462 flow [2024-06-21 17:27:27,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:27:27,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:27:27,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:27:27,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 17:27:27,904 INFO L175 Difference]: Start difference. First operand has 309 places, 421 transitions, 6434 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:27:27,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 458 transitions, 7462 flow [2024-06-21 17:27:31,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 458 transitions, 7310 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-21 17:27:31,239 INFO L231 Difference]: Finished difference. Result has 311 places, 421 transitions, 6387 flow [2024-06-21 17:27:31,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6282, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6387, PETRI_PLACES=311, PETRI_TRANSITIONS=421} [2024-06-21 17:27:31,240 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-21 17:27:31,240 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 421 transitions, 6387 flow [2024-06-21 17:27:31,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:31,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:31,240 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 17:27:31,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 17:27:31,241 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 17:27:31,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:31,241 INFO L85 PathProgramCache]: Analyzing trace with hash 261153976, now seen corresponding path program 2 times [2024-06-21 17:27:31,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:31,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24336674] [2024-06-21 17:27:31,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:31,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:34,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:34,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24336674] [2024-06-21 17:27:34,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24336674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:34,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:34,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:34,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243793911] [2024-06-21 17:27:34,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:34,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:34,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:34,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:34,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:34,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:27:34,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 421 transitions, 6387 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:34,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:34,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:27:34,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:37,963 INFO L124 PetriNetUnfolderBase]: 7145/11364 cut-off events. [2024-06-21 17:27:37,964 INFO L125 PetriNetUnfolderBase]: For 1224570/1224572 co-relation queries the response was YES. [2024-06-21 17:27:38,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89301 conditions, 11364 events. 7145/11364 cut-off events. For 1224570/1224572 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 76293 event pairs, 2833 based on Foata normal form. 14/11376 useless extension candidates. Maximal degree in co-relation 89156. Up to 10928 conditions per place. [2024-06-21 17:27:38,135 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 409 selfloop transitions, 43 changer transitions 0/456 dead transitions. [2024-06-21 17:27:38,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 456 transitions, 7455 flow [2024-06-21 17:27:38,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:27:38,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:27:38,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 17:27:38,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 17:27:38,137 INFO L175 Difference]: Start difference. First operand has 311 places, 421 transitions, 6387 flow. Second operand 9 states and 147 transitions. [2024-06-21 17:27:38,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 456 transitions, 7455 flow [2024-06-21 17:27:40,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 456 transitions, 7354 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 17:27:40,727 INFO L231 Difference]: Finished difference. Result has 312 places, 423 transitions, 6442 flow [2024-06-21 17:27:40,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6286, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6442, PETRI_PLACES=312, PETRI_TRANSITIONS=423} [2024-06-21 17:27:40,727 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-21 17:27:40,728 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 423 transitions, 6442 flow [2024-06-21 17:27:40,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:40,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:40,728 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 17:27:40,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 17:27:40,728 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 17:27:40,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:40,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1895231468, now seen corresponding path program 3 times [2024-06-21 17:27:40,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:40,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451630240] [2024-06-21 17:27:40,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:40,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:44,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:44,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451630240] [2024-06-21 17:27:44,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451630240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:44,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:44,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:44,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454345427] [2024-06-21 17:27:44,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:44,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:44,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:44,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:44,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:44,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:27:44,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 423 transitions, 6442 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:44,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:44,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:27:44,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:47,496 INFO L124 PetriNetUnfolderBase]: 7153/11377 cut-off events. [2024-06-21 17:27:47,497 INFO L125 PetriNetUnfolderBase]: For 1195424/1195428 co-relation queries the response was YES. [2024-06-21 17:27:47,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89539 conditions, 11377 events. 7153/11377 cut-off events. For 1195424/1195428 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 76396 event pairs, 2823 based on Foata normal form. 4/11379 useless extension candidates. Maximal degree in co-relation 89393. Up to 11050 conditions per place. [2024-06-21 17:27:47,656 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 404 selfloop transitions, 40 changer transitions 0/448 dead transitions. [2024-06-21 17:27:47,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 448 transitions, 7448 flow [2024-06-21 17:27:47,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:27:47,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:27:47,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 17:27:47,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-21 17:27:47,658 INFO L175 Difference]: Start difference. First operand has 312 places, 423 transitions, 6442 flow. Second operand 8 states and 127 transitions. [2024-06-21 17:27:47,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 448 transitions, 7448 flow [2024-06-21 17:27:50,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 448 transitions, 7318 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 17:27:50,352 INFO L231 Difference]: Finished difference. Result has 313 places, 425 transitions, 6461 flow [2024-06-21 17:27:50,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6316, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6461, PETRI_PLACES=313, PETRI_TRANSITIONS=425} [2024-06-21 17:27:50,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-21 17:27:50,353 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 425 transitions, 6461 flow [2024-06-21 17:27:50,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:50,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:50,353 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 17:27:50,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 17:27:50,354 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 17:27:50,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:50,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1895528138, now seen corresponding path program 4 times [2024-06-21 17:27:50,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:50,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421874227] [2024-06-21 17:27:50,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:50,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:53,764 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 17:27:53,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:53,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421874227] [2024-06-21 17:27:53,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421874227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:53,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:53,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:53,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739487328] [2024-06-21 17:27:53,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:53,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:53,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:53,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:53,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:53,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:27:53,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 425 transitions, 6461 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:53,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:53,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:27:53,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:56,919 INFO L124 PetriNetUnfolderBase]: 7148/11370 cut-off events. [2024-06-21 17:27:56,920 INFO L125 PetriNetUnfolderBase]: For 1188443/1188447 co-relation queries the response was YES. [2024-06-21 17:27:57,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89082 conditions, 11370 events. 7148/11370 cut-off events. For 1188443/1188447 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 76333 event pairs, 2814 based on Foata normal form. 4/11372 useless extension candidates. Maximal degree in co-relation 88935. Up to 10913 conditions per place. [2024-06-21 17:27:57,073 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 404 selfloop transitions, 47 changer transitions 0/455 dead transitions. [2024-06-21 17:27:57,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 455 transitions, 7517 flow [2024-06-21 17:27:57,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:27:57,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:27:57,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:27:57,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 17:27:57,080 INFO L175 Difference]: Start difference. First operand has 313 places, 425 transitions, 6461 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:27:57,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 455 transitions, 7517 flow [2024-06-21 17:27:59,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 455 transitions, 7388 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 17:27:59,683 INFO L231 Difference]: Finished difference. Result has 315 places, 427 transitions, 6495 flow [2024-06-21 17:27:59,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6332, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6495, PETRI_PLACES=315, PETRI_TRANSITIONS=427} [2024-06-21 17:27:59,684 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-21 17:27:59,684 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 427 transitions, 6495 flow [2024-06-21 17:27:59,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:59,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:59,684 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 17:27:59,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 17:27:59,685 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 17:27:59,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:59,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1810737411, now seen corresponding path program 1 times [2024-06-21 17:27:59,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:59,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271788048] [2024-06-21 17:27:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:59,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:02,926 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 17:28:02,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:02,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271788048] [2024-06-21 17:28:02,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271788048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:02,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:02,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:28:02,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349140100] [2024-06-21 17:28:02,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:02,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:28:02,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:02,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:28:02,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:28:02,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:28:02,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 427 transitions, 6495 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:02,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:02,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:28:02,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:06,250 INFO L124 PetriNetUnfolderBase]: 7130/11345 cut-off events. [2024-06-21 17:28:06,250 INFO L125 PetriNetUnfolderBase]: For 1213444/1213450 co-relation queries the response was YES. [2024-06-21 17:28:06,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88840 conditions, 11345 events. 7130/11345 cut-off events. For 1213444/1213450 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 75998 event pairs, 2724 based on Foata normal form. 14/11357 useless extension candidates. Maximal degree in co-relation 88692. Up to 10970 conditions per place. [2024-06-21 17:28:06,413 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 420 selfloop transitions, 44 changer transitions 0/468 dead transitions. [2024-06-21 17:28:06,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 468 transitions, 7552 flow [2024-06-21 17:28:06,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:28:06,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:28:06,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 17:28:06,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-21 17:28:06,422 INFO L175 Difference]: Start difference. First operand has 315 places, 427 transitions, 6495 flow. Second operand 9 states and 149 transitions. [2024-06-21 17:28:06,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 468 transitions, 7552 flow [2024-06-21 17:28:09,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 468 transitions, 7405 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 17:28:09,158 INFO L231 Difference]: Finished difference. Result has 318 places, 428 transitions, 6445 flow [2024-06-21 17:28:09,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6348, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6445, PETRI_PLACES=318, PETRI_TRANSITIONS=428} [2024-06-21 17:28:09,158 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-21 17:28:09,159 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 428 transitions, 6445 flow [2024-06-21 17:28:09,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:09,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:09,159 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 17:28:09,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 17:28:09,159 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 17:28:09,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:09,160 INFO L85 PathProgramCache]: Analyzing trace with hash 656189487, now seen corresponding path program 2 times [2024-06-21 17:28:09,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:09,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268998686] [2024-06-21 17:28:09,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:09,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:12,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:12,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268998686] [2024-06-21 17:28:12,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268998686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:12,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:12,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:28:12,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992085660] [2024-06-21 17:28:12,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:12,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:28:12,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:12,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:28:12,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:28:12,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:28:12,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 428 transitions, 6445 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:12,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:12,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:28:12,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:16,023 INFO L124 PetriNetUnfolderBase]: 7222/11489 cut-off events. [2024-06-21 17:28:16,024 INFO L125 PetriNetUnfolderBase]: For 1242710/1242716 co-relation queries the response was YES. [2024-06-21 17:28:16,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89941 conditions, 11489 events. 7222/11489 cut-off events. For 1242710/1242716 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 77238 event pairs, 2961 based on Foata normal form. 14/11501 useless extension candidates. Maximal degree in co-relation 89792. Up to 11120 conditions per place. [2024-06-21 17:28:16,176 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 426 selfloop transitions, 52 changer transitions 0/482 dead transitions. [2024-06-21 17:28:16,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 482 transitions, 7743 flow [2024-06-21 17:28:16,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:28:16,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:28:16,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-21 17:28:16,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 17:28:16,179 INFO L175 Difference]: Start difference. First operand has 318 places, 428 transitions, 6445 flow. Second operand 10 states and 160 transitions. [2024-06-21 17:28:16,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 482 transitions, 7743 flow [2024-06-21 17:28:19,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 482 transitions, 7495 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-21 17:28:19,620 INFO L231 Difference]: Finished difference. Result has 321 places, 441 transitions, 6527 flow [2024-06-21 17:28:19,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6223, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6527, PETRI_PLACES=321, PETRI_TRANSITIONS=441} [2024-06-21 17:28:19,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-21 17:28:19,621 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 441 transitions, 6527 flow [2024-06-21 17:28:19,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:19,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:19,621 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 17:28:19,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 17:28:19,621 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 17:28:19,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:19,622 INFO L85 PathProgramCache]: Analyzing trace with hash 369175977, now seen corresponding path program 1 times [2024-06-21 17:28:19,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:19,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660133422] [2024-06-21 17:28:19,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:19,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:22,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:22,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660133422] [2024-06-21 17:28:22,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660133422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:22,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:22,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:28:22,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611708184] [2024-06-21 17:28:22,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:22,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:28:22,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:22,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:28:22,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:28:22,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:28:22,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 441 transitions, 6527 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:22,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:22,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:28:22,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:26,529 INFO L124 PetriNetUnfolderBase]: 7264/11547 cut-off events. [2024-06-21 17:28:26,529 INFO L125 PetriNetUnfolderBase]: For 1273468/1273474 co-relation queries the response was YES. [2024-06-21 17:28:26,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90553 conditions, 11547 events. 7264/11547 cut-off events. For 1273468/1273474 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 77765 event pairs, 2801 based on Foata normal form. 8/11553 useless extension candidates. Maximal degree in co-relation 90404. Up to 10972 conditions per place. [2024-06-21 17:28:26,678 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 398 selfloop transitions, 94 changer transitions 0/496 dead transitions. [2024-06-21 17:28:26,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 496 transitions, 8097 flow [2024-06-21 17:28:26,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:28:26,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:28:26,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-21 17:28:26,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-21 17:28:26,680 INFO L175 Difference]: Start difference. First operand has 321 places, 441 transitions, 6527 flow. Second operand 11 states and 186 transitions. [2024-06-21 17:28:26,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 496 transitions, 8097 flow [2024-06-21 17:28:29,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 496 transitions, 7999 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 17:28:29,373 INFO L231 Difference]: Finished difference. Result has 328 places, 447 transitions, 6819 flow [2024-06-21 17:28:29,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6429, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6819, PETRI_PLACES=328, PETRI_TRANSITIONS=447} [2024-06-21 17:28:29,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-21 17:28:29,389 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 447 transitions, 6819 flow [2024-06-21 17:28:29,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:29,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:29,389 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, 1] [2024-06-21 17:28:29,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 17:28:29,389 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 17:28:29,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:29,390 INFO L85 PathProgramCache]: Analyzing trace with hash 479150223, now seen corresponding path program 1 times [2024-06-21 17:28:29,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:29,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305976417] [2024-06-21 17:28:29,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:29,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:33,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:33,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:33,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305976417] [2024-06-21 17:28:33,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305976417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:33,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:33,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:28:33,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345956296] [2024-06-21 17:28:33,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:33,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:28:33,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:33,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:28:33,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:28:33,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:28:33,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 447 transitions, 6819 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:33,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:33,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:28:33,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:36,892 INFO L124 PetriNetUnfolderBase]: 7254/11539 cut-off events. [2024-06-21 17:28:36,893 INFO L125 PetriNetUnfolderBase]: For 1308420/1308426 co-relation queries the response was YES. [2024-06-21 17:28:36,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92499 conditions, 11539 events. 7254/11539 cut-off events. For 1308420/1308426 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 77613 event pairs, 2910 based on Foata normal form. 12/11549 useless extension candidates. Maximal degree in co-relation 92348. Up to 11152 conditions per place. [2024-06-21 17:28:37,030 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 417 selfloop transitions, 67 changer transitions 0/488 dead transitions. [2024-06-21 17:28:37,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 488 transitions, 8062 flow [2024-06-21 17:28:37,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:28:37,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:28:37,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 17:28:37,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 17:28:37,032 INFO L175 Difference]: Start difference. First operand has 328 places, 447 transitions, 6819 flow. Second operand 10 states and 165 transitions. [2024-06-21 17:28:37,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 488 transitions, 8062 flow [2024-06-21 17:28:40,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 488 transitions, 7775 flow, removed 62 selfloop flow, removed 9 redundant places. [2024-06-21 17:28:40,571 INFO L231 Difference]: Finished difference. Result has 329 places, 448 transitions, 6685 flow [2024-06-21 17:28:40,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6532, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6685, PETRI_PLACES=329, PETRI_TRANSITIONS=448} [2024-06-21 17:28:40,572 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-21 17:28:40,572 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 448 transitions, 6685 flow [2024-06-21 17:28:40,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:40,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:40,572 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 17:28:40,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 17:28:40,573 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 17:28:40,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:40,573 INFO L85 PathProgramCache]: Analyzing trace with hash 479150037, now seen corresponding path program 2 times [2024-06-21 17:28:40,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:40,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717020822] [2024-06-21 17:28:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:40,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:43,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:43,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717020822] [2024-06-21 17:28:43,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717020822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:43,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:43,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:28:43,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95096913] [2024-06-21 17:28:43,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:43,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:28:43,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:43,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:28:43,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:28:43,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:28:43,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 448 transitions, 6685 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:43,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:43,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:28:43,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:47,107 INFO L124 PetriNetUnfolderBase]: 7228/11499 cut-off events. [2024-06-21 17:28:47,107 INFO L125 PetriNetUnfolderBase]: For 1319452/1319458 co-relation queries the response was YES. [2024-06-21 17:28:47,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91968 conditions, 11499 events. 7228/11499 cut-off events. For 1319452/1319458 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 77215 event pairs, 2956 based on Foata normal form. 12/11509 useless extension candidates. Maximal degree in co-relation 91817. Up to 11133 conditions per place. [2024-06-21 17:28:47,291 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 416 selfloop transitions, 67 changer transitions 0/487 dead transitions. [2024-06-21 17:28:47,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 487 transitions, 7761 flow [2024-06-21 17:28:47,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:28:47,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:28:47,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-21 17:28:47,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-21 17:28:47,293 INFO L175 Difference]: Start difference. First operand has 329 places, 448 transitions, 6685 flow. Second operand 10 states and 164 transitions. [2024-06-21 17:28:47,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 487 transitions, 7761 flow [2024-06-21 17:28:50,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 487 transitions, 7506 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-21 17:28:50,017 INFO L231 Difference]: Finished difference. Result has 331 places, 448 transitions, 6572 flow [2024-06-21 17:28:50,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6430, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6572, PETRI_PLACES=331, PETRI_TRANSITIONS=448} [2024-06-21 17:28:50,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-21 17:28:50,018 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 448 transitions, 6572 flow [2024-06-21 17:28:50,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:50,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:50,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:28:50,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 17:28:50,019 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 17:28:50,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:50,019 INFO L85 PathProgramCache]: Analyzing trace with hash 656281743, now seen corresponding path program 2 times [2024-06-21 17:28:50,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:50,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179982394] [2024-06-21 17:28:50,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:50,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:53,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:53,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179982394] [2024-06-21 17:28:53,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179982394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:53,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:53,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:28:53,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103717116] [2024-06-21 17:28:53,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:53,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:28:53,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:53,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:28:53,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:28:53,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:28:53,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 448 transitions, 6572 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:53,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:53,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:28:53,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:57,449 INFO L124 PetriNetUnfolderBase]: 7322/11627 cut-off events. [2024-06-21 17:28:57,449 INFO L125 PetriNetUnfolderBase]: For 1353590/1353596 co-relation queries the response was YES. [2024-06-21 17:28:57,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92085 conditions, 11627 events. 7322/11627 cut-off events. For 1353590/1353596 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 77990 event pairs, 2921 based on Foata normal form. 12/11637 useless extension candidates. Maximal degree in co-relation 91934. Up to 11184 conditions per place. [2024-06-21 17:28:57,607 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 421 selfloop transitions, 84 changer transitions 1/510 dead transitions. [2024-06-21 17:28:57,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 510 transitions, 8166 flow [2024-06-21 17:28:57,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:28:57,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:28:57,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 204 transitions. [2024-06-21 17:28:57,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37362637362637363 [2024-06-21 17:28:57,608 INFO L175 Difference]: Start difference. First operand has 331 places, 448 transitions, 6572 flow. Second operand 13 states and 204 transitions. [2024-06-21 17:28:57,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 510 transitions, 8166 flow [2024-06-21 17:29:01,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 510 transitions, 7990 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 17:29:01,100 INFO L231 Difference]: Finished difference. Result has 336 places, 463 transitions, 6867 flow [2024-06-21 17:29:01,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6408, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6867, PETRI_PLACES=336, PETRI_TRANSITIONS=463} [2024-06-21 17:29:01,100 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-21 17:29:01,101 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 463 transitions, 6867 flow [2024-06-21 17:29:01,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:01,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:01,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:29:01,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 17:29:01,101 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 17:29:01,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:01,102 INFO L85 PathProgramCache]: Analyzing trace with hash 546664803, now seen corresponding path program 3 times [2024-06-21 17:29:01,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:01,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959025189] [2024-06-21 17:29:01,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:01,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:29:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:29:04,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:29:04,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959025189] [2024-06-21 17:29:04,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959025189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:29:04,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:29:04,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:29:04,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876561063] [2024-06-21 17:29:04,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:29:04,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:29:04,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:29:04,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:29:04,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:29:04,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:29:04,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 463 transitions, 6867 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:04,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:29:04,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:29:04,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:29:08,688 INFO L124 PetriNetUnfolderBase]: 7304/11603 cut-off events. [2024-06-21 17:29:08,688 INFO L125 PetriNetUnfolderBase]: For 1366524/1366530 co-relation queries the response was YES. [2024-06-21 17:29:08,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92230 conditions, 11603 events. 7304/11603 cut-off events. For 1366524/1366530 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 77740 event pairs, 2926 based on Foata normal form. 8/11609 useless extension candidates. Maximal degree in co-relation 92077. Up to 11173 conditions per place. [2024-06-21 17:29:08,835 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 415 selfloop transitions, 85 changer transitions 2/506 dead transitions. [2024-06-21 17:29:08,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 506 transitions, 8006 flow [2024-06-21 17:29:08,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:29:08,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:29:08,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-21 17:29:08,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-21 17:29:08,836 INFO L175 Difference]: Start difference. First operand has 336 places, 463 transitions, 6867 flow. Second operand 12 states and 188 transitions. [2024-06-21 17:29:08,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 506 transitions, 8006 flow [2024-06-21 17:29:11,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 506 transitions, 7776 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 17:29:11,925 INFO L231 Difference]: Finished difference. Result has 339 places, 462 transitions, 6796 flow [2024-06-21 17:29:11,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6637, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6796, PETRI_PLACES=339, PETRI_TRANSITIONS=462} [2024-06-21 17:29:11,926 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-21 17:29:11,926 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 462 transitions, 6796 flow [2024-06-21 17:29:11,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:11,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:11,926 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 17:29:11,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 17:29:11,926 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 17:29:11,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:11,927 INFO L85 PathProgramCache]: Analyzing trace with hash 849908035, now seen corresponding path program 3 times [2024-06-21 17:29:11,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:11,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509131309] [2024-06-21 17:29:11,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:11,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:29:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:29:15,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:29:15,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509131309] [2024-06-21 17:29:15,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509131309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:29:15,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:29:15,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:29:15,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940607888] [2024-06-21 17:29:15,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:29:15,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:29:15,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:29:15,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:29:15,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:29:15,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:29:15,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 462 transitions, 6796 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:15,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:29:15,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:29:15,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:29:19,370 INFO L124 PetriNetUnfolderBase]: 7316/11632 cut-off events. [2024-06-21 17:29:19,371 INFO L125 PetriNetUnfolderBase]: For 1414230/1414232 co-relation queries the response was YES. [2024-06-21 17:29:19,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92773 conditions, 11632 events. 7316/11632 cut-off events. For 1414230/1414232 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 78094 event pairs, 2969 based on Foata normal form. 8/11638 useless extension candidates. Maximal degree in co-relation 92618. Up to 11244 conditions per place. [2024-06-21 17:29:19,521 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 439 selfloop transitions, 56 changer transitions 0/499 dead transitions. [2024-06-21 17:29:19,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 499 transitions, 7947 flow [2024-06-21 17:29:19,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:29:19,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:29:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 166 transitions. [2024-06-21 17:29:19,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3593073593073593 [2024-06-21 17:29:19,523 INFO L175 Difference]: Start difference. First operand has 339 places, 462 transitions, 6796 flow. Second operand 11 states and 166 transitions. [2024-06-21 17:29:19,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 499 transitions, 7947 flow [2024-06-21 17:29:22,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 499 transitions, 7787 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 17:29:22,747 INFO L231 Difference]: Finished difference. Result has 342 places, 465 transitions, 6804 flow [2024-06-21 17:29:22,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6636, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6804, PETRI_PLACES=342, PETRI_TRANSITIONS=465} [2024-06-21 17:29:22,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-21 17:29:22,748 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 465 transitions, 6804 flow [2024-06-21 17:29:22,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:22,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:22,749 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 17:29:22,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 17:29:22,749 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 17:29:22,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:22,749 INFO L85 PathProgramCache]: Analyzing trace with hash -241910959, now seen corresponding path program 3 times [2024-06-21 17:29:22,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:22,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067709881] [2024-06-21 17:29:22,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:22,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:29:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:29:26,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:29:26,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067709881] [2024-06-21 17:29:26,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067709881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:29:26,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:29:26,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:29:26,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259903869] [2024-06-21 17:29:26,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:29:26,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:29:26,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:29:26,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:29:26,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:29:26,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:29:26,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 465 transitions, 6804 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:26,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:29:26,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:29:26,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:29:29,852 INFO L124 PetriNetUnfolderBase]: 7422/11779 cut-off events. [2024-06-21 17:29:29,853 INFO L125 PetriNetUnfolderBase]: For 1473579/1473583 co-relation queries the response was YES. [2024-06-21 17:29:29,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95574 conditions, 11779 events. 7422/11779 cut-off events. For 1473579/1473583 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 78915 event pairs, 2810 based on Foata normal form. 4/11781 useless extension candidates. Maximal degree in co-relation 95417. Up to 10329 conditions per place. [2024-06-21 17:29:30,030 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 327 selfloop transitions, 206 changer transitions 0/537 dead transitions. [2024-06-21 17:29:30,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 537 transitions, 8882 flow [2024-06-21 17:29:30,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:29:30,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:29:30,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 222 transitions. [2024-06-21 17:29:30,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 17:29:30,032 INFO L175 Difference]: Start difference. First operand has 342 places, 465 transitions, 6804 flow. Second operand 12 states and 222 transitions. [2024-06-21 17:29:30,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 537 transitions, 8882 flow [2024-06-21 17:29:33,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 537 transitions, 8755 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 17:29:33,864 INFO L231 Difference]: Finished difference. Result has 347 places, 474 transitions, 7309 flow [2024-06-21 17:29:33,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6677, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7309, PETRI_PLACES=347, PETRI_TRANSITIONS=474} [2024-06-21 17:29:33,864 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-21 17:29:33,864 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 474 transitions, 7309 flow [2024-06-21 17:29:33,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:33,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:33,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:29:33,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 17:29:33,865 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 17:29:33,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:33,865 INFO L85 PathProgramCache]: Analyzing trace with hash -86977137, now seen corresponding path program 4 times [2024-06-21 17:29:33,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:33,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323723228] [2024-06-21 17:29:33,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:33,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:29:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:29:37,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:29:37,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323723228] [2024-06-21 17:29:37,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323723228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:29:37,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:29:37,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:29:37,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755836496] [2024-06-21 17:29:37,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:29:37,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:29:37,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:29:37,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:29:37,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:29:37,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:29:37,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 474 transitions, 7309 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:37,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:29:37,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:29:37,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:29:40,776 INFO L124 PetriNetUnfolderBase]: 7487/11872 cut-off events. [2024-06-21 17:29:40,776 INFO L125 PetriNetUnfolderBase]: For 1529004/1529008 co-relation queries the response was YES. [2024-06-21 17:29:40,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99013 conditions, 11872 events. 7487/11872 cut-off events. For 1529004/1529008 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 79468 event pairs, 3015 based on Foata normal form. 8/11878 useless extension candidates. Maximal degree in co-relation 98856. Up to 11394 conditions per place. [2024-06-21 17:29:40,979 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 411 selfloop transitions, 102 changer transitions 3/520 dead transitions. [2024-06-21 17:29:40,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 520 transitions, 8596 flow [2024-06-21 17:29:40,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:29:40,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:29:40,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-21 17:29:40,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-21 17:29:40,981 INFO L175 Difference]: Start difference. First operand has 347 places, 474 transitions, 7309 flow. Second operand 10 states and 164 transitions. [2024-06-21 17:29:40,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 520 transitions, 8596 flow [2024-06-21 17:29:45,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 520 transitions, 8295 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-21 17:29:45,087 INFO L231 Difference]: Finished difference. Result has 352 places, 484 transitions, 7389 flow [2024-06-21 17:29:45,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7017, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7389, PETRI_PLACES=352, PETRI_TRANSITIONS=484} [2024-06-21 17:29:45,088 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-21 17:29:45,088 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 484 transitions, 7389 flow [2024-06-21 17:29:45,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:45,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:45,088 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 17:29:45,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 17:29:45,089 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 17:29:45,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:45,089 INFO L85 PathProgramCache]: Analyzing trace with hash -236548579, now seen corresponding path program 4 times [2024-06-21 17:29:45,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:45,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298710092] [2024-06-21 17:29:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:45,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:29:48,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:29:48,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:29:48,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298710092] [2024-06-21 17:29:48,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298710092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:29:48,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:29:48,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:29:48,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542737596] [2024-06-21 17:29:48,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:29:48,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:29:48,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:29:48,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:29:48,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:29:48,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:29:48,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 484 transitions, 7389 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:48,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:29:48,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:29:48,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:29:52,536 INFO L124 PetriNetUnfolderBase]: 7473/11854 cut-off events. [2024-06-21 17:29:52,537 INFO L125 PetriNetUnfolderBase]: For 1544539/1544543 co-relation queries the response was YES. [2024-06-21 17:29:52,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97725 conditions, 11854 events. 7473/11854 cut-off events. For 1544539/1544543 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 79388 event pairs, 2789 based on Foata normal form. 4/11856 useless extension candidates. Maximal degree in co-relation 97565. Up to 10365 conditions per place. [2024-06-21 17:29:52,714 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 315 selfloop transitions, 222 changer transitions 0/541 dead transitions. [2024-06-21 17:29:52,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 541 transitions, 9393 flow [2024-06-21 17:29:52,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:29:52,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:29:52,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-21 17:29:52,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:29:52,716 INFO L175 Difference]: Start difference. First operand has 352 places, 484 transitions, 7389 flow. Second operand 11 states and 198 transitions. [2024-06-21 17:29:52,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 541 transitions, 9393 flow [2024-06-21 17:29:56,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 541 transitions, 9160 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 17:29:56,521 INFO L231 Difference]: Finished difference. Result has 358 places, 490 transitions, 7848 flow [2024-06-21 17:29:56,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7156, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7848, PETRI_PLACES=358, PETRI_TRANSITIONS=490} [2024-06-21 17:29:56,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-21 17:29:56,522 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 490 transitions, 7848 flow [2024-06-21 17:29:56,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:56,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:56,522 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 17:29:56,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 17:29:56,522 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 17:29:56,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:56,523 INFO L85 PathProgramCache]: Analyzing trace with hash 337316811, now seen corresponding path program 1 times [2024-06-21 17:29:56,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:56,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429561992] [2024-06-21 17:29:56,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:56,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:56,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:29:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:29:59,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:29:59,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429561992] [2024-06-21 17:29:59,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429561992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:29:59,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:29:59,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:29:59,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674815888] [2024-06-21 17:29:59,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:29:59,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:29:59,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:29:59,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:29:59,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:29:59,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:29:59,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 490 transitions, 7848 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:59,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:29:59,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:29:59,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:03,548 INFO L124 PetriNetUnfolderBase]: 7461/11823 cut-off events. [2024-06-21 17:30:03,549 INFO L125 PetriNetUnfolderBase]: For 1577940/1577948 co-relation queries the response was YES. [2024-06-21 17:30:03,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98500 conditions, 11823 events. 7461/11823 cut-off events. For 1577940/1577948 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 79106 event pairs, 2969 based on Foata normal form. 12/11833 useless extension candidates. Maximal degree in co-relation 98338. Up to 11255 conditions per place. [2024-06-21 17:30:03,732 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 425 selfloop transitions, 107 changer transitions 0/536 dead transitions. [2024-06-21 17:30:03,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 536 transitions, 9206 flow [2024-06-21 17:30:03,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:30:03,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:30:03,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-21 17:30:03,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-21 17:30:03,734 INFO L175 Difference]: Start difference. First operand has 358 places, 490 transitions, 7848 flow. Second operand 11 states and 183 transitions. [2024-06-21 17:30:03,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 536 transitions, 9206 flow [2024-06-21 17:30:07,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 536 transitions, 8699 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-21 17:30:07,662 INFO L231 Difference]: Finished difference. Result has 362 places, 490 transitions, 7561 flow [2024-06-21 17:30:07,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7341, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7561, PETRI_PLACES=362, PETRI_TRANSITIONS=490} [2024-06-21 17:30:07,663 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-21 17:30:07,663 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 490 transitions, 7561 flow [2024-06-21 17:30:07,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:07,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:07,663 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 17:30:07,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 17:30:07,663 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 17:30:07,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:07,664 INFO L85 PathProgramCache]: Analyzing trace with hash 337316439, now seen corresponding path program 5 times [2024-06-21 17:30:07,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:07,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424837233] [2024-06-21 17:30:07,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:07,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:11,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:11,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424837233] [2024-06-21 17:30:11,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424837233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:11,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:11,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:30:11,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667831953] [2024-06-21 17:30:11,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:11,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:30:11,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:11,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:30:11,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:30:11,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:30:11,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 490 transitions, 7561 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:11,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:11,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:30:11,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:15,115 INFO L124 PetriNetUnfolderBase]: 7455/11836 cut-off events. [2024-06-21 17:30:15,116 INFO L125 PetriNetUnfolderBase]: For 1598235/1598239 co-relation queries the response was YES. [2024-06-21 17:30:15,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97911 conditions, 11836 events. 7455/11836 cut-off events. For 1598235/1598239 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 79394 event pairs, 2793 based on Foata normal form. 4/11838 useless extension candidates. Maximal degree in co-relation 97748. Up to 10358 conditions per place. [2024-06-21 17:30:15,312 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 311 selfloop transitions, 221 changer transitions 0/536 dead transitions. [2024-06-21 17:30:15,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 536 transitions, 9163 flow [2024-06-21 17:30:15,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:30:15,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:30:15,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-21 17:30:15,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41774891774891776 [2024-06-21 17:30:15,314 INFO L175 Difference]: Start difference. First operand has 362 places, 490 transitions, 7561 flow. Second operand 11 states and 193 transitions. [2024-06-21 17:30:15,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 536 transitions, 9163 flow [2024-06-21 17:30:20,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 536 transitions, 8840 flow, removed 44 selfloop flow, removed 10 redundant places. [2024-06-21 17:30:20,190 INFO L231 Difference]: Finished difference. Result has 363 places, 490 transitions, 7686 flow [2024-06-21 17:30:20,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7238, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7686, PETRI_PLACES=363, PETRI_TRANSITIONS=490} [2024-06-21 17:30:20,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-21 17:30:20,205 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 490 transitions, 7686 flow [2024-06-21 17:30:20,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:20,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:20,205 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 17:30:20,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 17:30:20,205 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 17:30:20,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:20,206 INFO L85 PathProgramCache]: Analyzing trace with hash -232525213, now seen corresponding path program 5 times [2024-06-21 17:30:20,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:20,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171144034] [2024-06-21 17:30:20,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:20,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:23,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:23,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171144034] [2024-06-21 17:30:23,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171144034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:23,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:23,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:30:23,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562372662] [2024-06-21 17:30:23,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:23,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:30:23,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:23,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:30:23,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:30:23,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:30:23,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 490 transitions, 7686 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:23,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:23,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:30:23,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:28,070 INFO L124 PetriNetUnfolderBase]: 7586/12031 cut-off events. [2024-06-21 17:30:28,070 INFO L125 PetriNetUnfolderBase]: For 1671011/1671015 co-relation queries the response was YES. [2024-06-21 17:30:28,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100615 conditions, 12031 events. 7586/12031 cut-off events. For 1671011/1671015 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 80744 event pairs, 2970 based on Foata normal form. 8/12037 useless extension candidates. Maximal degree in co-relation 100451. Up to 11373 conditions per place. [2024-06-21 17:30:28,247 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 405 selfloop transitions, 131 changer transitions 1/541 dead transitions. [2024-06-21 17:30:28,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 541 transitions, 9330 flow [2024-06-21 17:30:28,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:30:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:30:28,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-21 17:30:28,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-21 17:30:28,249 INFO L175 Difference]: Start difference. First operand has 363 places, 490 transitions, 7686 flow. Second operand 10 states and 166 transitions. [2024-06-21 17:30:28,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 541 transitions, 9330 flow [2024-06-21 17:30:32,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 541 transitions, 8831 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 17:30:32,756 INFO L231 Difference]: Finished difference. Result has 365 places, 507 transitions, 7820 flow [2024-06-21 17:30:32,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7226, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7820, PETRI_PLACES=365, PETRI_TRANSITIONS=507} [2024-06-21 17:30:32,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-21 17:30:32,757 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 507 transitions, 7820 flow [2024-06-21 17:30:32,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:32,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:32,757 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, 1] [2024-06-21 17:30:32,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 17:30:32,758 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 17:30:32,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:32,758 INFO L85 PathProgramCache]: Analyzing trace with hash 341030115, now seen corresponding path program 6 times [2024-06-21 17:30:32,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:32,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086757280] [2024-06-21 17:30:32,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:32,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:37,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:37,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086757280] [2024-06-21 17:30:37,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086757280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:37,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:37,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:30:37,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57104542] [2024-06-21 17:30:37,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:37,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:30:37,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:37,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:30:37,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:30:37,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:30:37,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 507 transitions, 7820 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:37,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:37,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:30:37,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:41,837 INFO L124 PetriNetUnfolderBase]: 7556/11995 cut-off events. [2024-06-21 17:30:41,838 INFO L125 PetriNetUnfolderBase]: For 1681214/1681218 co-relation queries the response was YES. [2024-06-21 17:30:41,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99848 conditions, 11995 events. 7556/11995 cut-off events. For 1681214/1681218 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 80693 event pairs, 2988 based on Foata normal form. 8/12001 useless extension candidates. Maximal degree in co-relation 99681. Up to 11354 conditions per place. [2024-06-21 17:30:41,996 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 407 selfloop transitions, 127 changer transitions 2/540 dead transitions. [2024-06-21 17:30:41,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 540 transitions, 8976 flow [2024-06-21 17:30:41,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:30:41,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:30:41,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-21 17:30:41,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 17:30:41,998 INFO L175 Difference]: Start difference. First operand has 365 places, 507 transitions, 7820 flow. Second operand 11 states and 176 transitions. [2024-06-21 17:30:41,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 540 transitions, 8976 flow [2024-06-21 17:30:46,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 540 transitions, 8861 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 17:30:46,308 INFO L231 Difference]: Finished difference. Result has 373 places, 505 transitions, 7934 flow [2024-06-21 17:30:46,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7705, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7934, PETRI_PLACES=373, PETRI_TRANSITIONS=505} [2024-06-21 17:30:46,308 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-21 17:30:46,309 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 505 transitions, 7934 flow [2024-06-21 17:30:46,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:46,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:46,309 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 17:30:46,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 17:30:46,309 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 17:30:46,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:46,310 INFO L85 PathProgramCache]: Analyzing trace with hash 850000291, now seen corresponding path program 7 times [2024-06-21 17:30:46,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:46,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361369131] [2024-06-21 17:30:46,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:46,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:50,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:50,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361369131] [2024-06-21 17:30:50,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361369131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:50,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:50,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:30:50,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299042389] [2024-06-21 17:30:50,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:50,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:30:50,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:50,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:30:50,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:30:50,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:30:50,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 505 transitions, 7934 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:50,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:50,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:30:50,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:54,860 INFO L124 PetriNetUnfolderBase]: 7621/12083 cut-off events. [2024-06-21 17:30:54,860 INFO L125 PetriNetUnfolderBase]: For 1725920/1725922 co-relation queries the response was YES. [2024-06-21 17:30:54,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101568 conditions, 12083 events. 7621/12083 cut-off events. For 1725920/1725922 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 81086 event pairs, 3002 based on Foata normal form. 6/12087 useless extension candidates. Maximal degree in co-relation 101399. Up to 11682 conditions per place. [2024-06-21 17:30:55,027 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 479 selfloop transitions, 65 changer transitions 1/549 dead transitions. [2024-06-21 17:30:55,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 549 transitions, 9574 flow [2024-06-21 17:30:55,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:30:55,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:30:55,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 168 transitions. [2024-06-21 17:30:55,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 17:30:55,031 INFO L175 Difference]: Start difference. First operand has 373 places, 505 transitions, 7934 flow. Second operand 11 states and 168 transitions. [2024-06-21 17:30:55,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 549 transitions, 9574 flow [2024-06-21 17:31:00,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 549 transitions, 9283 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 17:31:00,110 INFO L231 Difference]: Finished difference. Result has 375 places, 516 transitions, 8051 flow [2024-06-21 17:31:00,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7649, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8051, PETRI_PLACES=375, PETRI_TRANSITIONS=516} [2024-06-21 17:31:00,110 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-21 17:31:00,110 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 516 transitions, 8051 flow [2024-06-21 17:31:00,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:00,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:00,111 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 17:31:00,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 17:31:00,111 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 17:31:00,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:00,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1931307477, now seen corresponding path program 8 times [2024-06-21 17:31:00,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:00,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372650495] [2024-06-21 17:31:00,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:00,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat