./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.opt.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-76401ed-m [2024-06-20 16:52:55,418 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:52:55,482 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:52:55,488 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:52:55,488 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:52:55,516 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:52:55,516 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:52:55,517 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:52:55,517 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:52:55,520 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:52:55,520 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:52:55,521 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:52:55,522 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:52:55,522 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:52:55,523 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:52:55,523 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:52:55,523 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:52:55,523 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:52:55,524 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:52:55,524 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:52:55,524 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:52:55,524 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:52:55,525 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:52:55,525 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:52:55,525 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:52:55,525 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:52:55,525 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:52:55,526 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:52:55,526 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:52:55,526 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:52:55,527 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:52:55,527 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:52:55,528 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:52:55,528 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:52:55,528 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:52:55,528 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:52:55,528 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:52:55,528 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:52:55,529 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:52:55,529 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:52:55,529 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:52:55,529 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:52:55,529 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:52:55,530 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:52:55,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:52:55,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:52:55,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:52:55,756 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:52:55,756 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:52:55,757 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.opt.i [2024-06-20 16:52:56,813 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:52:57,008 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:52:57,008 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.opt.i [2024-06-20 16:52:57,025 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef08b60d5/101d0f18efb14b89b74e870935cbb8c9/FLAGe1e213478 [2024-06-20 16:52:57,036 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef08b60d5/101d0f18efb14b89b74e870935cbb8c9 [2024-06-20 16:52:57,038 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:52:57,038 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:52:57,039 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-20 16:52:57,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:52:57,266 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:52:57,267 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:52:57,267 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:52:57,271 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:52:57,271 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:52:57" (1/2) ... [2024-06-20 16:52:57,272 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55d77262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:52:57, skipping insertion in model container [2024-06-20 16:52:57,272 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:52:57" (1/2) ... [2024-06-20 16:52:57,273 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2eda2548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:52:57, skipping insertion in model container [2024-06-20 16:52:57,274 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:52:57" (2/2) ... [2024-06-20 16:52:57,274 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55d77262 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:52:57, skipping insertion in model container [2024-06-20 16:52:57,274 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:52:57" (2/2) ... [2024-06-20 16:52:57,275 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:52:57,387 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:52:57,389 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] (((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & z) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-20 16:52:57,389 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & z) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-20 16:52:57,389 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & z) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-20 16:52:57,389 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:52:57,389 INFO L106 edCorrectnessWitness]: ghost_update [L837-L837] multithreaded = 1; [2024-06-20 16:52:57,425 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:52:57,722 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:52:57,743 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:52:57,878 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:52:57,909 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:52:57,909 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:52:57 WrapperNode [2024-06-20 16:52:57,909 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:52:57,911 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:52:57,911 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:52:57,911 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:52:57,916 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:52:57" (1/1) ... [2024-06-20 16:52:57,932 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:52:57" (1/1) ... [2024-06-20 16:52:57,957 INFO L138 Inliner]: procedures = 175, calls = 80, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 209 [2024-06-20 16:52:57,957 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:52:57,958 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:52:57,958 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:52:57,958 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:52:57,974 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:52:57" (1/1) ... [2024-06-20 16:52:57,974 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:52:57" (1/1) ... [2024-06-20 16:52:57,978 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:52:57" (1/1) ... [2024-06-20 16:52:58,016 INFO L175 MemorySlicer]: Split 39 memory accesses to 2 slices as follows [2, 37]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-20 16:52:58,016 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:52:57" (1/1) ... [2024-06-20 16:52:58,016 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:52:57" (1/1) ... [2024-06-20 16:52:58,024 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:52:57" (1/1) ... [2024-06-20 16:52:58,038 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:52:57" (1/1) ... [2024-06-20 16:52:58,039 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:52:57" (1/1) ... [2024-06-20 16:52:58,052 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:52:57" (1/1) ... [2024-06-20 16:52:58,056 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:52:58,056 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:52:58,057 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:52:58,057 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:52:58,057 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:52:57" (1/1) ... [2024-06-20 16:52:58,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:52:58,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:52:58,102 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) [2024-06-20 16:52:58,140 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 [2024-06-20 16:52:58,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-20 16:52:58,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-20 16:52:58,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-20 16:52:58,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-20 16:52:58,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:52:58,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:52:58,181 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:52:58,181 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:52:58,181 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:52:58,181 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:52:58,182 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:52:58,182 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:52:58,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:52:58,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-20 16:52:58,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:52:58,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:52:58,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:52:58,185 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:52:58,396 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:52:58,402 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:52:58,798 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:52:58,798 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:52:59,125 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:52:59,125 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:52:59,125 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:52:59 BoogieIcfgContainer [2024-06-20 16:52:59,126 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:52:59,128 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:52:59,128 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:52:59,130 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:52:59,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:52:57" (1/4) ... [2024-06-20 16:52:59,131 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46f1fb2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:52:59, skipping insertion in model container [2024-06-20 16:52:59,131 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:52:57" (2/4) ... [2024-06-20 16:52:59,131 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46f1fb2c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:52:59, skipping insertion in model container [2024-06-20 16:52:59,131 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:52:57" (3/4) ... [2024-06-20 16:52:59,131 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46f1fb2c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:52:59, skipping insertion in model container [2024-06-20 16:52:59,132 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:52:59" (4/4) ... [2024-06-20 16:52:59,133 INFO L112 eAbstractionObserver]: Analyzing ICFG safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.opt.i [2024-06-20 16:52:59,147 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:52:59,147 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 16:52:59,147 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:52:59,201 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:52:59,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 16:52:59,261 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-20 16:52:59,261 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:52:59,263 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 56 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. [2024-06-20 16:52:59,264 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 16:52:59,267 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-20 16:52:59,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:52:59,284 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;@bde210d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:52:59,284 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 16:52:59,290 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:52:59,290 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:52:59,290 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:52:59,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:59,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:52:59,291 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)] === [2024-06-20 16:52:59,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:59,323 INFO L85 PathProgramCache]: Analyzing trace with hash 639325454, now seen corresponding path program 1 times [2024-06-20 16:52:59,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:59,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302872270] [2024-06-20 16:52:59,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:59,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:01,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:01,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:01,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302872270] [2024-06-20 16:53:01,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302872270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:01,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:01,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:53:01,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412688255] [2024-06-20 16:53:01,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:01,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:53:01,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:01,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:53:01,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:53:01,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 16:53:01,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:01,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:01,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 16:53:01,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:01,462 INFO L124 PetriNetUnfolderBase]: 775/1248 cut-off events. [2024-06-20 16:53:01,462 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-06-20 16:53:01,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2503 conditions, 1248 events. 775/1248 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5987 event pairs, 500 based on Foata normal form. 1/1216 useless extension candidates. Maximal degree in co-relation 2491. Up to 1188 conditions per place. [2024-06-20 16:53:01,471 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-20 16:53:01,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 179 flow [2024-06-20 16:53:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:53:01,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:53:01,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-06-20 16:53:01,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-20 16:53:01,481 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 73 transitions. [2024-06-20 16:53:01,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 179 flow [2024-06-20 16:53:01,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 16:53:01,485 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-20 16:53:01,486 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} [2024-06-20 16:53:01,489 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-20 16:53:01,489 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-20 16:53:01,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:01,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:01,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:01,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:53:01,490 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)] === [2024-06-20 16:53:01,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:01,490 INFO L85 PathProgramCache]: Analyzing trace with hash 211464525, now seen corresponding path program 1 times [2024-06-20 16:53:01,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:01,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83885922] [2024-06-20 16:53:01,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:01,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:01,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:03,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:03,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83885922] [2024-06-20 16:53:03,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83885922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:03,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:03,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:53:03,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030192149] [2024-06-20 16:53:03,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:03,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:53:03,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:03,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:53:03,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:53:03,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 16:53:03,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:03,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:03,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 16:53:03,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:04,146 INFO L124 PetriNetUnfolderBase]: 769/1235 cut-off events. [2024-06-20 16:53:04,146 INFO L125 PetriNetUnfolderBase]: For 238/244 co-relation queries the response was YES. [2024-06-20 16:53:04,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2854 conditions, 1235 events. 769/1235 cut-off events. For 238/244 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5826 event pairs, 410 based on Foata normal form. 7/1239 useless extension candidates. Maximal degree in co-relation 2842. Up to 1160 conditions per place. [2024-06-20 16:53:04,152 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-20 16:53:04,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 254 flow [2024-06-20 16:53:04,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:53:04,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:53:04,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-20 16:53:04,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-20 16:53:04,154 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 96 transitions. [2024-06-20 16:53:04,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 254 flow [2024-06-20 16:53:04,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:53:04,156 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-20 16:53:04,156 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} [2024-06-20 16:53:04,156 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-20 16:53:04,157 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-20 16:53:04,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:04,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:04,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:04,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:53:04,157 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)] === [2024-06-20 16:53:04,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:04,158 INFO L85 PathProgramCache]: Analyzing trace with hash -2034533426, now seen corresponding path program 1 times [2024-06-20 16:53:04,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:04,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010290272] [2024-06-20 16:53:04,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:04,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:06,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:06,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010290272] [2024-06-20 16:53:06,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010290272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:06,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:06,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:53:06,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117015135] [2024-06-20 16:53:06,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:06,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:53:06,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:06,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:53:06,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:53:06,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:53:06,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:06,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:06,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:53:06,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:07,176 INFO L124 PetriNetUnfolderBase]: 968/1529 cut-off events. [2024-06-20 16:53:07,177 INFO L125 PetriNetUnfolderBase]: For 806/814 co-relation queries the response was YES. [2024-06-20 16:53:07,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3937 conditions, 1529 events. 968/1529 cut-off events. For 806/814 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7192 event pairs, 400 based on Foata normal form. 9/1536 useless extension candidates. Maximal degree in co-relation 3923. Up to 1433 conditions per place. [2024-06-20 16:53:07,185 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 10 changer transitions 0/75 dead transitions. [2024-06-20 16:53:07,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 75 transitions, 379 flow [2024-06-20 16:53:07,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:53:07,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:53:07,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-20 16:53:07,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-20 16:53:07,187 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 115 transitions. [2024-06-20 16:53:07,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 75 transitions, 379 flow [2024-06-20 16:53:07,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 75 transitions, 358 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 16:53:07,189 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 208 flow [2024-06-20 16:53:07,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-06-20 16:53:07,190 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-20 16:53:07,190 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 208 flow [2024-06-20 16:53:07,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:07,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:07,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:07,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:53:07,191 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:53:07,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:07,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1598366481, now seen corresponding path program 1 times [2024-06-20 16:53:07,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:07,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195070483] [2024-06-20 16:53:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:07,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:09,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:09,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195070483] [2024-06-20 16:53:09,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195070483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:09,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:09,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:53:09,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666867279] [2024-06-20 16:53:09,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:09,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:53:09,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:09,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:53:09,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:53:09,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:53:09,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 208 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:09,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:09,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:53:09,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:10,543 INFO L124 PetriNetUnfolderBase]: 959/1514 cut-off events. [2024-06-20 16:53:10,543 INFO L125 PetriNetUnfolderBase]: For 1379/1399 co-relation queries the response was YES. [2024-06-20 16:53:10,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4330 conditions, 1514 events. 959/1514 cut-off events. For 1379/1399 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7104 event pairs, 275 based on Foata normal form. 18/1530 useless extension candidates. Maximal degree in co-relation 4313. Up to 1380 conditions per place. [2024-06-20 16:53:10,552 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 63 selfloop transitions, 12 changer transitions 0/82 dead transitions. [2024-06-20 16:53:10,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 82 transitions, 442 flow [2024-06-20 16:53:10,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:53:10,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:53:10,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-20 16:53:10,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-20 16:53:10,557 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 208 flow. Second operand 6 states and 132 transitions. [2024-06-20 16:53:10,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 82 transitions, 442 flow [2024-06-20 16:53:10,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 82 transitions, 438 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 16:53:10,563 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 243 flow [2024-06-20 16:53:10,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-20 16:53:10,564 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-20 16:53:10,564 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 243 flow [2024-06-20 16:53:10,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:10,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:10,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:10,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:53:10,565 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)] === [2024-06-20 16:53:10,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:10,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1120390510, now seen corresponding path program 1 times [2024-06-20 16:53:10,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:10,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636727050] [2024-06-20 16:53:10,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:10,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:12,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:12,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:12,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636727050] [2024-06-20 16:53:12,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636727050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:12,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:12,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:53:12,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743928988] [2024-06-20 16:53:12,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:12,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:53:12,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:12,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:53:12,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:53:12,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:53:12,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 243 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:12,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:12,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:53:12,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:12,997 INFO L124 PetriNetUnfolderBase]: 1104/1722 cut-off events. [2024-06-20 16:53:12,998 INFO L125 PetriNetUnfolderBase]: For 2401/2401 co-relation queries the response was YES. [2024-06-20 16:53:13,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5263 conditions, 1722 events. 1104/1722 cut-off events. For 2401/2401 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8116 event pairs, 439 based on Foata normal form. 2/1721 useless extension candidates. Maximal degree in co-relation 5242. Up to 1645 conditions per place. [2024-06-20 16:53:13,009 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 57 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-20 16:53:13,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 71 transitions, 450 flow [2024-06-20 16:53:13,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:53:13,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:53:13,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-20 16:53:13,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:53:13,013 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 243 flow. Second operand 5 states and 90 transitions. [2024-06-20 16:53:13,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 71 transitions, 450 flow [2024-06-20 16:53:13,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 71 transitions, 417 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 16:53:13,022 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 289 flow [2024-06-20 16:53:13,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=289, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-20 16:53:13,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-20 16:53:13,024 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 289 flow [2024-06-20 16:53:13,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:13,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:13,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:13,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:53:13,025 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)] === [2024-06-20 16:53:13,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:13,026 INFO L85 PathProgramCache]: Analyzing trace with hash -675824677, now seen corresponding path program 1 times [2024-06-20 16:53:13,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:13,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290898181] [2024-06-20 16:53:13,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:13,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:15,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:15,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290898181] [2024-06-20 16:53:15,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290898181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:15,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:15,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:53:15,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619256105] [2024-06-20 16:53:15,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:15,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:53:15,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:15,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:53:15,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:53:15,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:53:15,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 289 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:15,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:15,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:53:15,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:17,071 INFO L124 PetriNetUnfolderBase]: 1084/1710 cut-off events. [2024-06-20 16:53:17,072 INFO L125 PetriNetUnfolderBase]: For 3507/3543 co-relation queries the response was YES. [2024-06-20 16:53:17,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5724 conditions, 1710 events. 1084/1710 cut-off events. For 3507/3543 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8147 event pairs, 376 based on Foata normal form. 12/1713 useless extension candidates. Maximal degree in co-relation 5700. Up to 1536 conditions per place. [2024-06-20 16:53:17,082 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 64 selfloop transitions, 24 changer transitions 0/96 dead transitions. [2024-06-20 16:53:17,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 96 transitions, 607 flow [2024-06-20 16:53:17,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:53:17,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:53:17,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-20 16:53:17,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-20 16:53:17,085 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 289 flow. Second operand 7 states and 140 transitions. [2024-06-20 16:53:17,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 96 transitions, 607 flow [2024-06-20 16:53:17,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 96 transitions, 603 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-20 16:53:17,090 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 387 flow [2024-06-20 16:53:17,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=387, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-06-20 16:53:17,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-20 16:53:17,092 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 387 flow [2024-06-20 16:53:17,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:17,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:17,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:17,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:53:17,093 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)] === [2024-06-20 16:53:17,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:17,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1411247169, now seen corresponding path program 2 times [2024-06-20 16:53:17,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:17,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483249711] [2024-06-20 16:53:17,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:17,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:19,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:19,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483249711] [2024-06-20 16:53:19,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483249711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:19,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:19,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:53:19,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133396982] [2024-06-20 16:53:19,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:19,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:53:19,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:19,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:53:19,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:53:19,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:53:19,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 387 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:19,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:19,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:53:19,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:20,802 INFO L124 PetriNetUnfolderBase]: 1084/1717 cut-off events. [2024-06-20 16:53:20,803 INFO L125 PetriNetUnfolderBase]: For 5083/5141 co-relation queries the response was YES. [2024-06-20 16:53:20,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6257 conditions, 1717 events. 1084/1717 cut-off events. For 5083/5141 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8261 event pairs, 375 based on Foata normal form. 24/1731 useless extension candidates. Maximal degree in co-relation 6230. Up to 1569 conditions per place. [2024-06-20 16:53:20,813 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 66 selfloop transitions, 22 changer transitions 0/96 dead transitions. [2024-06-20 16:53:20,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 96 transitions, 679 flow [2024-06-20 16:53:20,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:53:20,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:53:20,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 16:53:20,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 16:53:20,815 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 387 flow. Second operand 7 states and 133 transitions. [2024-06-20 16:53:20,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 96 transitions, 679 flow [2024-06-20 16:53:20,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 96 transitions, 642 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:53:20,820 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 456 flow [2024-06-20 16:53:20,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=456, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-20 16:53:20,821 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-20 16:53:20,821 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 456 flow [2024-06-20 16:53:20,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:20,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:20,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:20,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:53:20,822 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)] === [2024-06-20 16:53:20,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:20,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1411246983, now seen corresponding path program 1 times [2024-06-20 16:53:20,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:20,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932100871] [2024-06-20 16:53:20,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:20,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:23,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:23,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932100871] [2024-06-20 16:53:23,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932100871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:23,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:23,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:53:23,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977045539] [2024-06-20 16:53:23,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:23,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:53:23,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:23,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:53:23,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:53:23,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:53:23,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 456 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:23,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:23,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:53:23,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:24,775 INFO L124 PetriNetUnfolderBase]: 1171/1837 cut-off events. [2024-06-20 16:53:24,776 INFO L125 PetriNetUnfolderBase]: For 5989/5989 co-relation queries the response was YES. [2024-06-20 16:53:24,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6798 conditions, 1837 events. 1171/1837 cut-off events. For 5989/5989 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8786 event pairs, 404 based on Foata normal form. 2/1834 useless extension candidates. Maximal degree in co-relation 6769. Up to 1671 conditions per place. [2024-06-20 16:53:24,789 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 87 selfloop transitions, 20 changer transitions 0/112 dead transitions. [2024-06-20 16:53:24,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 112 transitions, 854 flow [2024-06-20 16:53:24,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:53:24,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:53:24,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 16:53:24,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-20 16:53:24,792 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 456 flow. Second operand 7 states and 131 transitions. [2024-06-20 16:53:24,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 112 transitions, 854 flow [2024-06-20 16:53:24,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 112 transitions, 787 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 16:53:24,798 INFO L231 Difference]: Finished difference. Result has 73 places, 80 transitions, 540 flow [2024-06-20 16:53:24,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=540, PETRI_PLACES=73, PETRI_TRANSITIONS=80} [2024-06-20 16:53:24,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-20 16:53:24,800 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 80 transitions, 540 flow [2024-06-20 16:53:24,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:24,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:24,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:24,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:53:24,801 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)] === [2024-06-20 16:53:24,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:24,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1729197655, now seen corresponding path program 2 times [2024-06-20 16:53:24,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:24,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077271095] [2024-06-20 16:53:24,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:24,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:24,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:27,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:27,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077271095] [2024-06-20 16:53:27,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077271095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:27,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:27,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:53:27,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850875345] [2024-06-20 16:53:27,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:27,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:53:27,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:27,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:53:27,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:53:27,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:53:27,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 80 transitions, 540 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:27,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:27,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:53:27,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:28,350 INFO L124 PetriNetUnfolderBase]: 1184/1856 cut-off events. [2024-06-20 16:53:28,350 INFO L125 PetriNetUnfolderBase]: For 7479/7479 co-relation queries the response was YES. [2024-06-20 16:53:28,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7333 conditions, 1856 events. 1184/1856 cut-off events. For 7479/7479 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8856 event pairs, 404 based on Foata normal form. 2/1853 useless extension candidates. Maximal degree in co-relation 7301. Up to 1685 conditions per place. [2024-06-20 16:53:28,366 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 82 selfloop transitions, 23 changer transitions 0/110 dead transitions. [2024-06-20 16:53:28,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 110 transitions, 873 flow [2024-06-20 16:53:28,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:53:28,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:53:28,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-20 16:53:28,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-20 16:53:28,368 INFO L175 Difference]: Start difference. First operand has 73 places, 80 transitions, 540 flow. Second operand 6 states and 115 transitions. [2024-06-20 16:53:28,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 110 transitions, 873 flow [2024-06-20 16:53:28,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 110 transitions, 843 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:53:28,382 INFO L231 Difference]: Finished difference. Result has 77 places, 84 transitions, 608 flow [2024-06-20 16:53:28,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=608, PETRI_PLACES=77, PETRI_TRANSITIONS=84} [2024-06-20 16:53:28,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-20 16:53:28,383 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 84 transitions, 608 flow [2024-06-20 16:53:28,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:28,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:28,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:28,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:53:28,384 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)] === [2024-06-20 16:53:28,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:28,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1729197469, now seen corresponding path program 3 times [2024-06-20 16:53:28,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:28,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380971823] [2024-06-20 16:53:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:28,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:30,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:30,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380971823] [2024-06-20 16:53:30,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380971823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:30,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:30,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:53:30,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838804224] [2024-06-20 16:53:30,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:30,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:53:30,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:30,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:53:30,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:53:31,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:53:31,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 608 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:31,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:31,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:53:31,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:32,049 INFO L124 PetriNetUnfolderBase]: 1104/1761 cut-off events. [2024-06-20 16:53:32,049 INFO L125 PetriNetUnfolderBase]: For 8914/9013 co-relation queries the response was YES. [2024-06-20 16:53:32,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7230 conditions, 1761 events. 1104/1761 cut-off events. For 8914/9013 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8595 event pairs, 346 based on Foata normal form. 16/1743 useless extension candidates. Maximal degree in co-relation 7196. Up to 1545 conditions per place. [2024-06-20 16:53:32,108 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 67 selfloop transitions, 32 changer transitions 0/111 dead transitions. [2024-06-20 16:53:32,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 111 transitions, 872 flow [2024-06-20 16:53:32,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:53:32,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:53:32,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-20 16:53:32,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4801587301587302 [2024-06-20 16:53:32,110 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 608 flow. Second operand 6 states and 121 transitions. [2024-06-20 16:53:32,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 111 transitions, 872 flow [2024-06-20 16:53:32,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 111 transitions, 824 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 16:53:32,119 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 643 flow [2024-06-20 16:53:32,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=643, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-20 16:53:32,119 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-20 16:53:32,120 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 643 flow [2024-06-20 16:53:32,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:32,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:32,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:32,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:53:32,120 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)] === [2024-06-20 16:53:32,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:32,121 INFO L85 PathProgramCache]: Analyzing trace with hash -298370971, now seen corresponding path program 3 times [2024-06-20 16:53:32,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:32,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216035545] [2024-06-20 16:53:32,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:32,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:34,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:34,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216035545] [2024-06-20 16:53:34,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216035545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:34,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:34,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:53:34,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834392214] [2024-06-20 16:53:34,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:34,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:53:34,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:34,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:53:34,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:53:34,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:53:34,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 643 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:34,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:34,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:53:34,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:35,344 INFO L124 PetriNetUnfolderBase]: 1171/1844 cut-off events. [2024-06-20 16:53:35,345 INFO L125 PetriNetUnfolderBase]: For 9375/9401 co-relation queries the response was YES. [2024-06-20 16:53:35,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7521 conditions, 1844 events. 1171/1844 cut-off events. For 9375/9401 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8856 event pairs, 417 based on Foata normal form. 22/1860 useless extension candidates. Maximal degree in co-relation 7487. Up to 1669 conditions per place. [2024-06-20 16:53:35,354 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 77 selfloop transitions, 23 changer transitions 0/105 dead transitions. [2024-06-20 16:53:35,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 105 transitions, 901 flow [2024-06-20 16:53:35,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:53:35,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:53:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-20 16:53:35,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:53:35,356 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 643 flow. Second operand 6 states and 108 transitions. [2024-06-20 16:53:35,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 105 transitions, 901 flow [2024-06-20 16:53:35,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 105 transitions, 831 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 16:53:35,364 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 634 flow [2024-06-20 16:53:35,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=634, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2024-06-20 16:53:35,365 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-20 16:53:35,365 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 634 flow [2024-06-20 16:53:35,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:35,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:35,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:35,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:53:35,366 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)] === [2024-06-20 16:53:35,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:35,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1729443733, now seen corresponding path program 1 times [2024-06-20 16:53:35,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:35,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272536681] [2024-06-20 16:53:35,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:35,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:37,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:37,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:37,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272536681] [2024-06-20 16:53:37,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272536681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:37,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:37,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:53:37,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403353683] [2024-06-20 16:53:37,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:37,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:53:37,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:37,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:53:37,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:53:37,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:53:37,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 634 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:37,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:37,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:53:37,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:38,127 INFO L124 PetriNetUnfolderBase]: 1163/1826 cut-off events. [2024-06-20 16:53:38,128 INFO L125 PetriNetUnfolderBase]: For 8606/8609 co-relation queries the response was YES. [2024-06-20 16:53:38,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7420 conditions, 1826 events. 1163/1826 cut-off events. For 8606/8609 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8682 event pairs, 379 based on Foata normal form. 6/1829 useless extension candidates. Maximal degree in co-relation 7385. Up to 1709 conditions per place. [2024-06-20 16:53:38,137 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 92 selfloop transitions, 11 changer transitions 0/108 dead transitions. [2024-06-20 16:53:38,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 108 transitions, 903 flow [2024-06-20 16:53:38,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:53:38,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:53:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-20 16:53:38,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 16:53:38,139 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 634 flow. Second operand 6 states and 106 transitions. [2024-06-20 16:53:38,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 108 transitions, 903 flow [2024-06-20 16:53:38,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 108 transitions, 869 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-20 16:53:38,146 INFO L231 Difference]: Finished difference. Result has 83 places, 87 transitions, 643 flow [2024-06-20 16:53:38,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=643, PETRI_PLACES=83, PETRI_TRANSITIONS=87} [2024-06-20 16:53:38,147 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-20 16:53:38,147 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 87 transitions, 643 flow [2024-06-20 16:53:38,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:38,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:38,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:38,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:53:38,148 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)] === [2024-06-20 16:53:38,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:38,148 INFO L85 PathProgramCache]: Analyzing trace with hash 524273140, now seen corresponding path program 1 times [2024-06-20 16:53:38,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:38,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103868775] [2024-06-20 16:53:38,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:38,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:41,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:41,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103868775] [2024-06-20 16:53:41,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103868775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:41,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:41,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:41,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362653814] [2024-06-20 16:53:41,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:41,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:41,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:41,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:41,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:41,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:53:41,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 87 transitions, 643 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:41,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:41,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:53:41,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:42,771 INFO L124 PetriNetUnfolderBase]: 1176/1849 cut-off events. [2024-06-20 16:53:42,772 INFO L125 PetriNetUnfolderBase]: For 10234/10234 co-relation queries the response was YES. [2024-06-20 16:53:42,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7723 conditions, 1849 events. 1176/1849 cut-off events. For 10234/10234 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8767 event pairs, 375 based on Foata normal form. 2/1846 useless extension candidates. Maximal degree in co-relation 7686. Up to 1576 conditions per place. [2024-06-20 16:53:42,781 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 102 selfloop transitions, 35 changer transitions 0/142 dead transitions. [2024-06-20 16:53:42,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 142 transitions, 1157 flow [2024-06-20 16:53:42,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:53:42,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:53:42,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 16:53:42,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-20 16:53:42,800 INFO L175 Difference]: Start difference. First operand has 83 places, 87 transitions, 643 flow. Second operand 8 states and 153 transitions. [2024-06-20 16:53:42,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 142 transitions, 1157 flow [2024-06-20 16:53:42,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 142 transitions, 1132 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 16:53:42,811 INFO L231 Difference]: Finished difference. Result has 89 places, 100 transitions, 818 flow [2024-06-20 16:53:42,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=818, PETRI_PLACES=89, PETRI_TRANSITIONS=100} [2024-06-20 16:53:42,811 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-20 16:53:42,811 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 100 transitions, 818 flow [2024-06-20 16:53:42,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:42,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:42,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:42,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:53:42,812 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)] === [2024-06-20 16:53:42,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:42,812 INFO L85 PathProgramCache]: Analyzing trace with hash -798987632, now seen corresponding path program 2 times [2024-06-20 16:53:42,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:42,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439555836] [2024-06-20 16:53:42,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:42,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:45,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:45,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439555836] [2024-06-20 16:53:45,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439555836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:45,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:45,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:45,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730449709] [2024-06-20 16:53:45,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:45,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:45,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:45,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:45,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:45,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:53:45,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 100 transitions, 818 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:45,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:45,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:53:45,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:46,796 INFO L124 PetriNetUnfolderBase]: 1207/1906 cut-off events. [2024-06-20 16:53:46,796 INFO L125 PetriNetUnfolderBase]: For 12693/12693 co-relation queries the response was YES. [2024-06-20 16:53:46,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8545 conditions, 1906 events. 1207/1906 cut-off events. For 12693/12693 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9174 event pairs, 375 based on Foata normal form. 2/1903 useless extension candidates. Maximal degree in co-relation 8505. Up to 1686 conditions per place. [2024-06-20 16:53:46,806 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 107 selfloop transitions, 31 changer transitions 0/143 dead transitions. [2024-06-20 16:53:46,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 143 transitions, 1288 flow [2024-06-20 16:53:46,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:53:46,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:53:46,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:53:46,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-20 16:53:46,808 INFO L175 Difference]: Start difference. First operand has 89 places, 100 transitions, 818 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:53:46,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 143 transitions, 1288 flow [2024-06-20 16:53:46,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 143 transitions, 1234 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-20 16:53:46,825 INFO L231 Difference]: Finished difference. Result has 95 places, 107 transitions, 910 flow [2024-06-20 16:53:46,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=910, PETRI_PLACES=95, PETRI_TRANSITIONS=107} [2024-06-20 16:53:46,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-20 16:53:46,827 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 107 transitions, 910 flow [2024-06-20 16:53:46,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:46,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:46,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:46,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:53:46,827 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)] === [2024-06-20 16:53:46,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:46,828 INFO L85 PathProgramCache]: Analyzing trace with hash -798982052, now seen corresponding path program 3 times [2024-06-20 16:53:46,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:46,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656423587] [2024-06-20 16:53:46,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:46,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:49,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:49,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656423587] [2024-06-20 16:53:49,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656423587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:49,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:49,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:49,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373329516] [2024-06-20 16:53:49,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:49,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:49,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:49,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:49,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:49,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:53:49,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 107 transitions, 910 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:49,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:49,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:53:49,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:50,762 INFO L124 PetriNetUnfolderBase]: 1202/1899 cut-off events. [2024-06-20 16:53:50,762 INFO L125 PetriNetUnfolderBase]: For 14270/14270 co-relation queries the response was YES. [2024-06-20 16:53:50,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8767 conditions, 1899 events. 1202/1899 cut-off events. For 14270/14270 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9139 event pairs, 375 based on Foata normal form. 2/1896 useless extension candidates. Maximal degree in co-relation 8724. Up to 1681 conditions per place. [2024-06-20 16:53:50,773 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 114 selfloop transitions, 33 changer transitions 0/152 dead transitions. [2024-06-20 16:53:50,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 152 transitions, 1323 flow [2024-06-20 16:53:50,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:53:50,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:53:50,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-20 16:53:50,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-20 16:53:50,790 INFO L175 Difference]: Start difference. First operand has 95 places, 107 transitions, 910 flow. Second operand 10 states and 177 transitions. [2024-06-20 16:53:50,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 152 transitions, 1323 flow [2024-06-20 16:53:50,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 152 transitions, 1279 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 16:53:50,809 INFO L231 Difference]: Finished difference. Result has 101 places, 108 transitions, 950 flow [2024-06-20 16:53:50,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=950, PETRI_PLACES=101, PETRI_TRANSITIONS=108} [2024-06-20 16:53:50,809 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-20 16:53:50,809 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 108 transitions, 950 flow [2024-06-20 16:53:50,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:50,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:50,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:50,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:53:50,810 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)] === [2024-06-20 16:53:50,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:50,811 INFO L85 PathProgramCache]: Analyzing trace with hash 2065521214, now seen corresponding path program 4 times [2024-06-20 16:53:50,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:50,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522226894] [2024-06-20 16:53:50,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:50,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:53,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:53,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522226894] [2024-06-20 16:53:53,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522226894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:53,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:53,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:53,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136305425] [2024-06-20 16:53:53,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:53,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:53,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:53,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:53,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:53,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:53:53,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 108 transitions, 950 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:53,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:53,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:53:53,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:55,449 INFO L124 PetriNetUnfolderBase]: 1233/1956 cut-off events. [2024-06-20 16:53:55,449 INFO L125 PetriNetUnfolderBase]: For 16368/16368 co-relation queries the response was YES. [2024-06-20 16:53:55,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9298 conditions, 1956 events. 1233/1956 cut-off events. For 16368/16368 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9505 event pairs, 375 based on Foata normal form. 2/1953 useless extension candidates. Maximal degree in co-relation 9253. Up to 1659 conditions per place. [2024-06-20 16:53:55,463 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 111 selfloop transitions, 46 changer transitions 0/162 dead transitions. [2024-06-20 16:53:55,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 162 transitions, 1548 flow [2024-06-20 16:53:55,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:53:55,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:53:55,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 16:53:55,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 16:53:55,465 INFO L175 Difference]: Start difference. First operand has 101 places, 108 transitions, 950 flow. Second operand 9 states and 171 transitions. [2024-06-20 16:53:55,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 162 transitions, 1548 flow [2024-06-20 16:53:55,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 162 transitions, 1480 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-20 16:53:55,480 INFO L231 Difference]: Finished difference. Result has 103 places, 115 transitions, 1067 flow [2024-06-20 16:53:55,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1067, PETRI_PLACES=103, PETRI_TRANSITIONS=115} [2024-06-20 16:53:55,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-20 16:53:55,481 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 115 transitions, 1067 flow [2024-06-20 16:53:55,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:55,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:55,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:55,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:53:55,481 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)] === [2024-06-20 16:53:55,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:55,482 INFO L85 PathProgramCache]: Analyzing trace with hash 2065515634, now seen corresponding path program 5 times [2024-06-20 16:53:55,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:55,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655370685] [2024-06-20 16:53:55,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:55,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:58,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:58,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655370685] [2024-06-20 16:53:58,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655370685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:58,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:58,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:58,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120893321] [2024-06-20 16:53:58,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:58,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:58,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:58,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:58,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:58,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:53:58,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 115 transitions, 1067 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:58,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:58,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:53:58,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:59,510 INFO L124 PetriNetUnfolderBase]: 1228/1949 cut-off events. [2024-06-20 16:53:59,511 INFO L125 PetriNetUnfolderBase]: For 18464/18464 co-relation queries the response was YES. [2024-06-20 16:53:59,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9549 conditions, 1949 events. 1228/1949 cut-off events. For 18464/18464 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9485 event pairs, 375 based on Foata normal form. 2/1946 useless extension candidates. Maximal degree in co-relation 9502. Up to 1654 conditions per place. [2024-06-20 16:53:59,522 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 101 selfloop transitions, 44 changer transitions 0/150 dead transitions. [2024-06-20 16:53:59,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 150 transitions, 1500 flow [2024-06-20 16:53:59,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:53:59,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:53:59,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-20 16:53:59,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-20 16:53:59,527 INFO L175 Difference]: Start difference. First operand has 103 places, 115 transitions, 1067 flow. Second operand 7 states and 137 transitions. [2024-06-20 16:53:59,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 150 transitions, 1500 flow [2024-06-20 16:53:59,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 150 transitions, 1384 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 16:53:59,563 INFO L231 Difference]: Finished difference. Result has 103 places, 115 transitions, 1055 flow [2024-06-20 16:53:59,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1055, PETRI_PLACES=103, PETRI_TRANSITIONS=115} [2024-06-20 16:53:59,564 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-20 16:53:59,564 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 115 transitions, 1055 flow [2024-06-20 16:53:59,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:59,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:59,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:59,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:53:59,565 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)] === [2024-06-20 16:53:59,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:59,565 INFO L85 PathProgramCache]: Analyzing trace with hash 2072872864, now seen corresponding path program 6 times [2024-06-20 16:53:59,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:59,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373107999] [2024-06-20 16:53:59,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:59,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:02,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:02,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:02,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373107999] [2024-06-20 16:54:02,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373107999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:02,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:02,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:02,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116637040] [2024-06-20 16:54:02,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:02,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:02,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:02,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:02,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:02,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:54:02,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 115 transitions, 1055 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:02,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:02,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:54:02,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:03,431 INFO L124 PetriNetUnfolderBase]: 1223/1948 cut-off events. [2024-06-20 16:54:03,431 INFO L125 PetriNetUnfolderBase]: For 18967/18995 co-relation queries the response was YES. [2024-06-20 16:54:03,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9455 conditions, 1948 events. 1223/1948 cut-off events. For 18967/18995 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9512 event pairs, 389 based on Foata normal form. 24/1966 useless extension candidates. Maximal degree in co-relation 9408. Up to 1649 conditions per place. [2024-06-20 16:54:03,442 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 104 selfloop transitions, 46 changer transitions 0/155 dead transitions. [2024-06-20 16:54:03,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 155 transitions, 1464 flow [2024-06-20 16:54:03,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:54:03,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:54:03,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:54:03,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-20 16:54:03,444 INFO L175 Difference]: Start difference. First operand has 103 places, 115 transitions, 1055 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:54:03,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 155 transitions, 1464 flow [2024-06-20 16:54:03,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 155 transitions, 1360 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 16:54:03,466 INFO L231 Difference]: Finished difference. Result has 105 places, 116 transitions, 1063 flow [2024-06-20 16:54:03,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1063, PETRI_PLACES=105, PETRI_TRANSITIONS=116} [2024-06-20 16:54:03,466 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-20 16:54:03,466 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 116 transitions, 1063 flow [2024-06-20 16:54:03,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:03,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:03,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:03,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:54:03,467 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)] === [2024-06-20 16:54:03,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:03,467 INFO L85 PathProgramCache]: Analyzing trace with hash -361703206, now seen corresponding path program 1 times [2024-06-20 16:54:03,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:03,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179341282] [2024-06-20 16:54:03,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:03,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:05,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:05,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179341282] [2024-06-20 16:54:05,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179341282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:05,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:05,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:05,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809468218] [2024-06-20 16:54:05,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:05,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:05,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:05,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:05,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:05,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:54:05,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 116 transitions, 1063 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:05,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:05,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:54:05,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:07,032 INFO L124 PetriNetUnfolderBase]: 1445/2322 cut-off events. [2024-06-20 16:54:07,032 INFO L125 PetriNetUnfolderBase]: For 23495/23525 co-relation queries the response was YES. [2024-06-20 16:54:07,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11739 conditions, 2322 events. 1445/2322 cut-off events. For 23495/23525 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11992 event pairs, 339 based on Foata normal form. 16/2276 useless extension candidates. Maximal degree in co-relation 11692. Up to 1779 conditions per place. [2024-06-20 16:54:07,043 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 110 selfloop transitions, 92 changer transitions 0/225 dead transitions. [2024-06-20 16:54:07,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 225 transitions, 2291 flow [2024-06-20 16:54:07,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:54:07,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:54:07,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-20 16:54:07,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-20 16:54:07,047 INFO L175 Difference]: Start difference. First operand has 105 places, 116 transitions, 1063 flow. Second operand 9 states and 180 transitions. [2024-06-20 16:54:07,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 225 transitions, 2291 flow [2024-06-20 16:54:07,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 225 transitions, 2155 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 16:54:07,071 INFO L231 Difference]: Finished difference. Result has 110 places, 173 transitions, 1802 flow [2024-06-20 16:54:07,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=961, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1802, PETRI_PLACES=110, PETRI_TRANSITIONS=173} [2024-06-20 16:54:07,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-20 16:54:07,072 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 173 transitions, 1802 flow [2024-06-20 16:54:07,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:07,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:07,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:07,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:54:07,073 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)] === [2024-06-20 16:54:07,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:07,073 INFO L85 PathProgramCache]: Analyzing trace with hash 883035772, now seen corresponding path program 2 times [2024-06-20 16:54:07,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:07,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587929883] [2024-06-20 16:54:07,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:07,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:10,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:10,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587929883] [2024-06-20 16:54:10,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587929883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:10,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:10,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:10,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299886529] [2024-06-20 16:54:10,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:10,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:10,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:10,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:10,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:10,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:54:10,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 173 transitions, 1802 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:10,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:10,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:54:10,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:11,352 INFO L124 PetriNetUnfolderBase]: 1457/2344 cut-off events. [2024-06-20 16:54:11,353 INFO L125 PetriNetUnfolderBase]: For 27081/27128 co-relation queries the response was YES. [2024-06-20 16:54:11,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12461 conditions, 2344 events. 1457/2344 cut-off events. For 27081/27128 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12180 event pairs, 228 based on Foata normal form. 30/2310 useless extension candidates. Maximal degree in co-relation 12410. Up to 1651 conditions per place. [2024-06-20 16:54:11,367 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 93 selfloop transitions, 102 changer transitions 0/218 dead transitions. [2024-06-20 16:54:11,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 218 transitions, 2418 flow [2024-06-20 16:54:11,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:54:11,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:54:11,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-20 16:54:11,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-20 16:54:11,376 INFO L175 Difference]: Start difference. First operand has 110 places, 173 transitions, 1802 flow. Second operand 8 states and 158 transitions. [2024-06-20 16:54:11,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 218 transitions, 2418 flow [2024-06-20 16:54:11,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 218 transitions, 2387 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-20 16:54:11,408 INFO L231 Difference]: Finished difference. Result has 116 places, 177 transitions, 2037 flow [2024-06-20 16:54:11,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2037, PETRI_PLACES=116, PETRI_TRANSITIONS=177} [2024-06-20 16:54:11,414 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-20 16:54:11,415 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 177 transitions, 2037 flow [2024-06-20 16:54:11,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:11,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:11,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:11,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:54:11,416 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)] === [2024-06-20 16:54:11,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:11,416 INFO L85 PathProgramCache]: Analyzing trace with hash -927405126, now seen corresponding path program 3 times [2024-06-20 16:54:11,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:11,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080373785] [2024-06-20 16:54:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:11,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:14,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:14,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:14,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080373785] [2024-06-20 16:54:14,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080373785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:14,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:14,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:14,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604839564] [2024-06-20 16:54:14,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:14,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:14,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:14,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:14,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:14,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:54:14,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 177 transitions, 2037 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:14,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:14,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:54:14,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:15,535 INFO L124 PetriNetUnfolderBase]: 1491/2405 cut-off events. [2024-06-20 16:54:15,536 INFO L125 PetriNetUnfolderBase]: For 32575/32629 co-relation queries the response was YES. [2024-06-20 16:54:15,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13409 conditions, 2405 events. 1491/2405 cut-off events. For 32575/32629 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12624 event pairs, 317 based on Foata normal form. 24/2364 useless extension candidates. Maximal degree in co-relation 13356. Up to 1907 conditions per place. [2024-06-20 16:54:15,554 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 101 selfloop transitions, 96 changer transitions 0/220 dead transitions. [2024-06-20 16:54:15,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 220 transitions, 2603 flow [2024-06-20 16:54:15,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:54:15,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:54:15,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-20 16:54:15,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-20 16:54:15,564 INFO L175 Difference]: Start difference. First operand has 116 places, 177 transitions, 2037 flow. Second operand 8 states and 155 transitions. [2024-06-20 16:54:15,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 220 transitions, 2603 flow [2024-06-20 16:54:15,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 220 transitions, 2461 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 16:54:15,598 INFO L231 Difference]: Finished difference. Result has 119 places, 181 transitions, 2163 flow [2024-06-20 16:54:15,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1899, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2163, PETRI_PLACES=119, PETRI_TRANSITIONS=181} [2024-06-20 16:54:15,599 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-20 16:54:15,599 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 181 transitions, 2163 flow [2024-06-20 16:54:15,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:15,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:15,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:15,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:54:15,600 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)] === [2024-06-20 16:54:15,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:15,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1001183902, now seen corresponding path program 4 times [2024-06-20 16:54:15,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:15,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478549297] [2024-06-20 16:54:15,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:15,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:18,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:18,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478549297] [2024-06-20 16:54:18,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478549297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:18,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:18,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:18,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502441879] [2024-06-20 16:54:18,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:18,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:18,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:18,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:18,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:18,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:54:18,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 181 transitions, 2163 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:18,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:18,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:54:18,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:19,935 INFO L124 PetriNetUnfolderBase]: 1531/2469 cut-off events. [2024-06-20 16:54:19,936 INFO L125 PetriNetUnfolderBase]: For 32359/32413 co-relation queries the response was YES. [2024-06-20 16:54:19,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13868 conditions, 2469 events. 1531/2469 cut-off events. For 32359/32413 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13023 event pairs, 315 based on Foata normal form. 24/2427 useless extension candidates. Maximal degree in co-relation 13814. Up to 2080 conditions per place. [2024-06-20 16:54:19,952 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 142 selfloop transitions, 57 changer transitions 0/222 dead transitions. [2024-06-20 16:54:19,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 222 transitions, 2735 flow [2024-06-20 16:54:19,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:54:19,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:54:19,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 16:54:19,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-20 16:54:19,954 INFO L175 Difference]: Start difference. First operand has 119 places, 181 transitions, 2163 flow. Second operand 8 states and 150 transitions. [2024-06-20 16:54:19,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 222 transitions, 2735 flow [2024-06-20 16:54:19,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 222 transitions, 2529 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 16:54:19,990 INFO L231 Difference]: Finished difference. Result has 121 places, 185 transitions, 2151 flow [2024-06-20 16:54:19,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1957, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2151, PETRI_PLACES=121, PETRI_TRANSITIONS=185} [2024-06-20 16:54:19,990 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-20 16:54:19,990 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 185 transitions, 2151 flow [2024-06-20 16:54:19,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:19,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:19,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:19,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:54:19,992 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)] === [2024-06-20 16:54:19,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:19,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1001368600, now seen corresponding path program 1 times [2024-06-20 16:54:19,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:19,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378394001] [2024-06-20 16:54:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:19,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:23,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:23,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378394001] [2024-06-20 16:54:23,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378394001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:23,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:23,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:23,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939335593] [2024-06-20 16:54:23,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:23,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:23,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:23,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:23,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:23,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:54:23,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 185 transitions, 2151 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:23,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:23,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:54:23,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:24,577 INFO L124 PetriNetUnfolderBase]: 1661/2638 cut-off events. [2024-06-20 16:54:24,577 INFO L125 PetriNetUnfolderBase]: For 31377/31385 co-relation queries the response was YES. [2024-06-20 16:54:24,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14477 conditions, 2638 events. 1661/2638 cut-off events. For 31377/31385 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13700 event pairs, 374 based on Foata normal form. 12/2645 useless extension candidates. Maximal degree in co-relation 14422. Up to 2360 conditions per place. [2024-06-20 16:54:24,596 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 189 selfloop transitions, 30 changer transitions 0/224 dead transitions. [2024-06-20 16:54:24,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 224 transitions, 2718 flow [2024-06-20 16:54:24,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:54:24,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:54:24,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 16:54:24,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-20 16:54:24,598 INFO L175 Difference]: Start difference. First operand has 121 places, 185 transitions, 2151 flow. Second operand 8 states and 145 transitions. [2024-06-20 16:54:24,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 224 transitions, 2718 flow [2024-06-20 16:54:24,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 224 transitions, 2582 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 16:54:24,645 INFO L231 Difference]: Finished difference. Result has 123 places, 187 transitions, 2100 flow [2024-06-20 16:54:24,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2015, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2100, PETRI_PLACES=123, PETRI_TRANSITIONS=187} [2024-06-20 16:54:24,646 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-20 16:54:24,646 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 187 transitions, 2100 flow [2024-06-20 16:54:24,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:24,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:24,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:24,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:54:24,647 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)] === [2024-06-20 16:54:24,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:24,647 INFO L85 PathProgramCache]: Analyzing trace with hash -393528068, now seen corresponding path program 5 times [2024-06-20 16:54:24,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:24,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187817614] [2024-06-20 16:54:24,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:24,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:27,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:27,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187817614] [2024-06-20 16:54:27,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187817614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:27,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:27,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:27,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815837175] [2024-06-20 16:54:27,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:27,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:27,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:27,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:27,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:27,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:54:27,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 187 transitions, 2100 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:27,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:27,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:54:27,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:28,541 INFO L124 PetriNetUnfolderBase]: 1530/2470 cut-off events. [2024-06-20 16:54:28,541 INFO L125 PetriNetUnfolderBase]: For 34691/34749 co-relation queries the response was YES. [2024-06-20 16:54:28,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13784 conditions, 2470 events. 1530/2470 cut-off events. For 34691/34749 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13032 event pairs, 212 based on Foata normal form. 39/2444 useless extension candidates. Maximal degree in co-relation 13728. Up to 1879 conditions per place. [2024-06-20 16:54:28,555 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 108 selfloop transitions, 89 changer transitions 0/221 dead transitions. [2024-06-20 16:54:28,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 221 transitions, 2598 flow [2024-06-20 16:54:28,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:54:28,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:54:28,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-20 16:54:28,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-20 16:54:28,557 INFO L175 Difference]: Start difference. First operand has 123 places, 187 transitions, 2100 flow. Second operand 7 states and 139 transitions. [2024-06-20 16:54:28,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 221 transitions, 2598 flow [2024-06-20 16:54:28,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 221 transitions, 2511 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 16:54:28,594 INFO L231 Difference]: Finished difference. Result has 124 places, 187 transitions, 2225 flow [2024-06-20 16:54:28,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2225, PETRI_PLACES=124, PETRI_TRANSITIONS=187} [2024-06-20 16:54:28,595 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-20 16:54:28,595 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 187 transitions, 2225 flow [2024-06-20 16:54:28,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:28,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:28,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:28,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:54:28,595 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)] === [2024-06-20 16:54:28,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:28,596 INFO L85 PathProgramCache]: Analyzing trace with hash -165442220, now seen corresponding path program 2 times [2024-06-20 16:54:28,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:28,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911145504] [2024-06-20 16:54:28,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:28,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:31,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:31,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911145504] [2024-06-20 16:54:31,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911145504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:31,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:31,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:31,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85346889] [2024-06-20 16:54:31,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:31,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:31,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:31,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:31,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:31,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:54:31,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 187 transitions, 2225 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:31,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:31,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:54:31,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:32,357 INFO L124 PetriNetUnfolderBase]: 1658/2642 cut-off events. [2024-06-20 16:54:32,357 INFO L125 PetriNetUnfolderBase]: For 36456/36496 co-relation queries the response was YES. [2024-06-20 16:54:32,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14761 conditions, 2642 events. 1658/2642 cut-off events. For 36456/36496 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13798 event pairs, 390 based on Foata normal form. 36/2669 useless extension candidates. Maximal degree in co-relation 14704. Up to 2359 conditions per place. [2024-06-20 16:54:32,375 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 182 selfloop transitions, 30 changer transitions 0/217 dead transitions. [2024-06-20 16:54:32,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 217 transitions, 2754 flow [2024-06-20 16:54:32,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:54:32,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:54:32,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 16:54:32,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-20 16:54:32,377 INFO L175 Difference]: Start difference. First operand has 124 places, 187 transitions, 2225 flow. Second operand 7 states and 124 transitions. [2024-06-20 16:54:32,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 217 transitions, 2754 flow [2024-06-20 16:54:32,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 217 transitions, 2554 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 16:54:32,413 INFO L231 Difference]: Finished difference. Result has 125 places, 189 transitions, 2114 flow [2024-06-20 16:54:32,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2114, PETRI_PLACES=125, PETRI_TRANSITIONS=189} [2024-06-20 16:54:32,414 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-20 16:54:32,414 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 189 transitions, 2114 flow [2024-06-20 16:54:32,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:32,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:32,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:32,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:54:32,415 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)] === [2024-06-20 16:54:32,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:32,415 INFO L85 PathProgramCache]: Analyzing trace with hash -156871340, now seen corresponding path program 3 times [2024-06-20 16:54:32,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:32,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762255607] [2024-06-20 16:54:32,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:32,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:34,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:34,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762255607] [2024-06-20 16:54:34,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762255607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:34,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:34,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:34,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251934976] [2024-06-20 16:54:34,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:34,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:34,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:34,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:34,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:34,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:54:34,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 189 transitions, 2114 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:34,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:34,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:54:34,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:35,935 INFO L124 PetriNetUnfolderBase]: 1678/2674 cut-off events. [2024-06-20 16:54:35,935 INFO L125 PetriNetUnfolderBase]: For 35603/35643 co-relation queries the response was YES. [2024-06-20 16:54:35,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14767 conditions, 2674 events. 1678/2674 cut-off events. For 35603/35643 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13994 event pairs, 354 based on Foata normal form. 36/2701 useless extension candidates. Maximal degree in co-relation 14709. Up to 2291 conditions per place. [2024-06-20 16:54:35,955 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 182 selfloop transitions, 37 changer transitions 0/224 dead transitions. [2024-06-20 16:54:35,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 224 transitions, 2765 flow [2024-06-20 16:54:35,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:54:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:54:35,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-20 16:54:35,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-20 16:54:35,958 INFO L175 Difference]: Start difference. First operand has 125 places, 189 transitions, 2114 flow. Second operand 7 states and 127 transitions. [2024-06-20 16:54:35,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 224 transitions, 2765 flow [2024-06-20 16:54:35,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 224 transitions, 2694 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 16:54:35,995 INFO L231 Difference]: Finished difference. Result has 127 places, 193 transitions, 2172 flow [2024-06-20 16:54:35,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2043, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2172, PETRI_PLACES=127, PETRI_TRANSITIONS=193} [2024-06-20 16:54:35,996 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-20 16:54:35,996 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 193 transitions, 2172 flow [2024-06-20 16:54:35,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:35,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:35,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:35,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:54:35,997 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)] === [2024-06-20 16:54:35,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:35,997 INFO L85 PathProgramCache]: Analyzing trace with hash -393343370, now seen corresponding path program 4 times [2024-06-20 16:54:35,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:35,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877900607] [2024-06-20 16:54:35,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:35,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:38,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:38,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:38,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877900607] [2024-06-20 16:54:38,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877900607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:38,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:38,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:38,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383227028] [2024-06-20 16:54:38,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:38,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:38,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:38,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:38,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:38,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:54:38,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 193 transitions, 2172 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:38,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:38,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:54:38,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:39,769 INFO L124 PetriNetUnfolderBase]: 1670/2658 cut-off events. [2024-06-20 16:54:39,770 INFO L125 PetriNetUnfolderBase]: For 37521/37531 co-relation queries the response was YES. [2024-06-20 16:54:39,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14930 conditions, 2658 events. 1670/2658 cut-off events. For 37521/37531 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13816 event pairs, 376 based on Foata normal form. 14/2667 useless extension candidates. Maximal degree in co-relation 14871. Up to 2357 conditions per place. [2024-06-20 16:54:39,785 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 186 selfloop transitions, 33 changer transitions 0/224 dead transitions. [2024-06-20 16:54:39,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 224 transitions, 2705 flow [2024-06-20 16:54:39,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:54:39,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:54:39,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 16:54:39,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-20 16:54:39,786 INFO L175 Difference]: Start difference. First operand has 127 places, 193 transitions, 2172 flow. Second operand 7 states and 129 transitions. [2024-06-20 16:54:39,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 224 transitions, 2705 flow [2024-06-20 16:54:39,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 224 transitions, 2646 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-20 16:54:39,828 INFO L231 Difference]: Finished difference. Result has 131 places, 193 transitions, 2189 flow [2024-06-20 16:54:39,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2113, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2189, PETRI_PLACES=131, PETRI_TRANSITIONS=193} [2024-06-20 16:54:39,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-20 16:54:39,829 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 193 transitions, 2189 flow [2024-06-20 16:54:39,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:39,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:39,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:39,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:54:39,829 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:54:39,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:39,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1354689440, now seen corresponding path program 1 times [2024-06-20 16:54:39,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:39,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221909994] [2024-06-20 16:54:39,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:39,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:41,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:41,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221909994] [2024-06-20 16:54:41,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221909994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:41,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:41,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:54:41,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181938914] [2024-06-20 16:54:41,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:41,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:54:41,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:41,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:54:41,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:54:41,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:54:41,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 193 transitions, 2189 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:41,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:41,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:54:41,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:42,286 INFO L124 PetriNetUnfolderBase]: 1536/2470 cut-off events. [2024-06-20 16:54:42,287 INFO L125 PetriNetUnfolderBase]: For 39224/39326 co-relation queries the response was YES. [2024-06-20 16:54:42,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14224 conditions, 2470 events. 1536/2470 cut-off events. For 39224/39326 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13066 event pairs, 393 based on Foata normal form. 92/2534 useless extension candidates. Maximal degree in co-relation 14163. Up to 2278 conditions per place. [2024-06-20 16:54:42,304 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 181 selfloop transitions, 13 changer transitions 0/207 dead transitions. [2024-06-20 16:54:42,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 207 transitions, 2627 flow [2024-06-20 16:54:42,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:54:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:54:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-20 16:54:42,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:54:42,306 INFO L175 Difference]: Start difference. First operand has 131 places, 193 transitions, 2189 flow. Second operand 5 states and 90 transitions. [2024-06-20 16:54:42,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 207 transitions, 2627 flow [2024-06-20 16:54:42,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 207 transitions, 2549 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:54:42,354 INFO L231 Difference]: Finished difference. Result has 130 places, 196 transitions, 2170 flow [2024-06-20 16:54:42,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2111, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2170, PETRI_PLACES=130, PETRI_TRANSITIONS=196} [2024-06-20 16:54:42,358 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-20 16:54:42,358 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 196 transitions, 2170 flow [2024-06-20 16:54:42,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:42,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:42,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:42,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:54:42,359 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)] === [2024-06-20 16:54:42,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:42,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1604306803, now seen corresponding path program 1 times [2024-06-20 16:54:42,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:42,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958546789] [2024-06-20 16:54:42,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:42,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:45,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:45,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958546789] [2024-06-20 16:54:45,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958546789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:45,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:45,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:54:45,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227406221] [2024-06-20 16:54:45,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:45,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:54:45,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:45,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:54:45,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:54:45,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:54:45,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 196 transitions, 2170 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:45,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:45,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:54:45,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:46,645 INFO L124 PetriNetUnfolderBase]: 1774/2854 cut-off events. [2024-06-20 16:54:46,646 INFO L125 PetriNetUnfolderBase]: For 45911/45921 co-relation queries the response was YES. [2024-06-20 16:54:46,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16129 conditions, 2854 events. 1774/2854 cut-off events. For 45911/45921 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15329 event pairs, 241 based on Foata normal form. 22/2871 useless extension candidates. Maximal degree in co-relation 16067. Up to 1727 conditions per place. [2024-06-20 16:54:46,667 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 192 selfloop transitions, 65 changer transitions 0/262 dead transitions. [2024-06-20 16:54:46,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 262 transitions, 3067 flow [2024-06-20 16:54:46,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:54:46,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:54:46,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 16:54:46,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-20 16:54:46,669 INFO L175 Difference]: Start difference. First operand has 130 places, 196 transitions, 2170 flow. Second operand 9 states and 174 transitions. [2024-06-20 16:54:46,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 262 transitions, 3067 flow [2024-06-20 16:54:46,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 262 transitions, 3032 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:54:46,726 INFO L231 Difference]: Finished difference. Result has 138 places, 203 transitions, 2391 flow [2024-06-20 16:54:46,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2135, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2391, PETRI_PLACES=138, PETRI_TRANSITIONS=203} [2024-06-20 16:54:46,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-20 16:54:46,728 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 203 transitions, 2391 flow [2024-06-20 16:54:46,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:46,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:46,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:46,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:54:46,729 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:54:46,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:46,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1315361683, now seen corresponding path program 2 times [2024-06-20 16:54:46,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:46,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109431032] [2024-06-20 16:54:46,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:46,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:49,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:49,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:49,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109431032] [2024-06-20 16:54:49,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109431032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:49,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:49,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:54:49,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830416672] [2024-06-20 16:54:49,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:49,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:54:49,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:49,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:54:49,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:54:49,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:54:49,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 203 transitions, 2391 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:49,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:49,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:54:49,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:51,224 INFO L124 PetriNetUnfolderBase]: 1842/2981 cut-off events. [2024-06-20 16:54:51,224 INFO L125 PetriNetUnfolderBase]: For 52685/52695 co-relation queries the response was YES. [2024-06-20 16:54:51,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17246 conditions, 2981 events. 1842/2981 cut-off events. For 52685/52695 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16370 event pairs, 405 based on Foata normal form. 26/3002 useless extension candidates. Maximal degree in co-relation 17181. Up to 2373 conditions per place. [2024-06-20 16:54:51,247 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 184 selfloop transitions, 63 changer transitions 0/252 dead transitions. [2024-06-20 16:54:51,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 252 transitions, 3057 flow [2024-06-20 16:54:51,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:54:51,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:54:51,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 16:54:51,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-20 16:54:51,249 INFO L175 Difference]: Start difference. First operand has 138 places, 203 transitions, 2391 flow. Second operand 9 states and 169 transitions. [2024-06-20 16:54:51,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 252 transitions, 3057 flow [2024-06-20 16:54:51,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 252 transitions, 2962 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 16:54:51,326 INFO L231 Difference]: Finished difference. Result has 143 places, 204 transitions, 2448 flow [2024-06-20 16:54:51,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2298, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2448, PETRI_PLACES=143, PETRI_TRANSITIONS=204} [2024-06-20 16:54:51,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-20 16:54:51,326 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 204 transitions, 2448 flow [2024-06-20 16:54:51,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:51,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:51,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:51,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:54:51,327 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)] === [2024-06-20 16:54:51,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:51,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1692872563, now seen corresponding path program 3 times [2024-06-20 16:54:51,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:51,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294430113] [2024-06-20 16:54:51,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:51,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:54,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:54,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294430113] [2024-06-20 16:54:54,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294430113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:54,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:54,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:54:54,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829280824] [2024-06-20 16:54:54,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:54,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:54:54,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:54,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:54:54,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:54:54,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:54:54,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 204 transitions, 2448 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:54,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:54,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:54:54,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:56,160 INFO L124 PetriNetUnfolderBase]: 1890/3065 cut-off events. [2024-06-20 16:54:56,160 INFO L125 PetriNetUnfolderBase]: For 55290/55300 co-relation queries the response was YES. [2024-06-20 16:54:56,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17891 conditions, 3065 events. 1890/3065 cut-off events. For 55290/55300 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16993 event pairs, 395 based on Foata normal form. 22/3082 useless extension candidates. Maximal degree in co-relation 17824. Up to 2311 conditions per place. [2024-06-20 16:54:56,182 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 190 selfloop transitions, 64 changer transitions 0/259 dead transitions. [2024-06-20 16:54:56,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 259 transitions, 3172 flow [2024-06-20 16:54:56,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:54:56,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:54:56,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 16:54:56,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-20 16:54:56,184 INFO L175 Difference]: Start difference. First operand has 143 places, 204 transitions, 2448 flow. Second operand 9 states and 172 transitions. [2024-06-20 16:54:56,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 259 transitions, 3172 flow [2024-06-20 16:54:56,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 259 transitions, 3043 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 16:54:56,255 INFO L231 Difference]: Finished difference. Result has 146 places, 208 transitions, 2518 flow [2024-06-20 16:54:56,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2319, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2518, PETRI_PLACES=146, PETRI_TRANSITIONS=208} [2024-06-20 16:54:56,256 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-20 16:54:56,256 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 208 transitions, 2518 flow [2024-06-20 16:54:56,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:56,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:56,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:56,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:54:56,257 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)] === [2024-06-20 16:54:56,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:56,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1126893073, now seen corresponding path program 4 times [2024-06-20 16:54:56,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:56,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972962085] [2024-06-20 16:54:56,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:56,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:59,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:59,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972962085] [2024-06-20 16:54:59,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972962085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:59,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:59,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:54:59,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997234283] [2024-06-20 16:54:59,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:59,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:54:59,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:59,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:54:59,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:54:59,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:54:59,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 208 transitions, 2518 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:59,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:59,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:54:59,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:00,934 INFO L124 PetriNetUnfolderBase]: 1958/3193 cut-off events. [2024-06-20 16:55:00,934 INFO L125 PetriNetUnfolderBase]: For 61137/61145 co-relation queries the response was YES. [2024-06-20 16:55:00,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18622 conditions, 3193 events. 1958/3193 cut-off events. For 61137/61145 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 18065 event pairs, 440 based on Foata normal form. 24/3212 useless extension candidates. Maximal degree in co-relation 18553. Up to 2732 conditions per place. [2024-06-20 16:55:00,960 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 210 selfloop transitions, 40 changer transitions 0/255 dead transitions. [2024-06-20 16:55:00,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 255 transitions, 3190 flow [2024-06-20 16:55:00,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:55:00,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:55:00,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 16:55:00,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 16:55:00,963 INFO L175 Difference]: Start difference. First operand has 146 places, 208 transitions, 2518 flow. Second operand 9 states and 165 transitions. [2024-06-20 16:55:00,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 255 transitions, 3190 flow [2024-06-20 16:55:01,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 255 transitions, 3103 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 16:55:01,043 INFO L231 Difference]: Finished difference. Result has 150 places, 209 transitions, 2539 flow [2024-06-20 16:55:01,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2431, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2539, PETRI_PLACES=150, PETRI_TRANSITIONS=209} [2024-06-20 16:55:01,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-20 16:55:01,045 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 209 transitions, 2539 flow [2024-06-20 16:55:01,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:01,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:01,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:01,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:55:01,045 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)] === [2024-06-20 16:55:01,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:01,046 INFO L85 PathProgramCache]: Analyzing trace with hash 971931537, now seen corresponding path program 5 times [2024-06-20 16:55:01,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:01,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061905995] [2024-06-20 16:55:01,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:01,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:04,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:04,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061905995] [2024-06-20 16:55:04,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061905995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:04,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:04,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:04,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196534997] [2024-06-20 16:55:04,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:04,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:04,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:04,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:04,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:04,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:55:04,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 209 transitions, 2539 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:04,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:04,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:55:04,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:06,098 INFO L124 PetriNetUnfolderBase]: 2102/3437 cut-off events. [2024-06-20 16:55:06,098 INFO L125 PetriNetUnfolderBase]: For 69573/69581 co-relation queries the response was YES. [2024-06-20 16:55:06,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20309 conditions, 3437 events. 2102/3437 cut-off events. For 69573/69581 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19910 event pairs, 458 based on Foata normal form. 20/3452 useless extension candidates. Maximal degree in co-relation 20238. Up to 2684 conditions per place. [2024-06-20 16:55:06,126 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 218 selfloop transitions, 41 changer transitions 0/264 dead transitions. [2024-06-20 16:55:06,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 264 transitions, 3389 flow [2024-06-20 16:55:06,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:55:06,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:55:06,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 16:55:06,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-20 16:55:06,128 INFO L175 Difference]: Start difference. First operand has 150 places, 209 transitions, 2539 flow. Second operand 9 states and 169 transitions. [2024-06-20 16:55:06,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 264 transitions, 3389 flow [2024-06-20 16:55:06,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 264 transitions, 3302 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 16:55:06,211 INFO L231 Difference]: Finished difference. Result has 153 places, 213 transitions, 2619 flow [2024-06-20 16:55:06,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2452, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2619, PETRI_PLACES=153, PETRI_TRANSITIONS=213} [2024-06-20 16:55:06,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-20 16:55:06,211 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 213 transitions, 2619 flow [2024-06-20 16:55:06,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:06,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:06,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:06,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:55:06,212 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)] === [2024-06-20 16:55:06,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:06,212 INFO L85 PathProgramCache]: Analyzing trace with hash 977441787, now seen corresponding path program 6 times [2024-06-20 16:55:06,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:06,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749537518] [2024-06-20 16:55:06,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:06,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:09,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:09,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749537518] [2024-06-20 16:55:09,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749537518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:09,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:09,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:09,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472489665] [2024-06-20 16:55:09,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:09,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:09,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:09,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:09,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:09,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:55:09,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 213 transitions, 2619 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:09,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:09,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:55:09,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:11,146 INFO L124 PetriNetUnfolderBase]: 2074/3393 cut-off events. [2024-06-20 16:55:11,146 INFO L125 PetriNetUnfolderBase]: For 70171/70179 co-relation queries the response was YES. [2024-06-20 16:55:11,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19950 conditions, 3393 events. 2074/3393 cut-off events. For 70171/70179 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 19574 event pairs, 464 based on Foata normal form. 24/3412 useless extension candidates. Maximal degree in co-relation 19877. Up to 2932 conditions per place. [2024-06-20 16:55:11,170 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 223 selfloop transitions, 42 changer transitions 0/270 dead transitions. [2024-06-20 16:55:11,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 270 transitions, 3354 flow [2024-06-20 16:55:11,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:55:11,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:55:11,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-20 16:55:11,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42207792207792205 [2024-06-20 16:55:11,172 INFO L175 Difference]: Start difference. First operand has 153 places, 213 transitions, 2619 flow. Second operand 11 states and 195 transitions. [2024-06-20 16:55:11,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 270 transitions, 3354 flow [2024-06-20 16:55:11,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 270 transitions, 3278 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 16:55:11,272 INFO L231 Difference]: Finished difference. Result has 159 places, 214 transitions, 2660 flow [2024-06-20 16:55:11,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2553, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2660, PETRI_PLACES=159, PETRI_TRANSITIONS=214} [2024-06-20 16:55:11,273 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-20 16:55:11,273 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 214 transitions, 2660 flow [2024-06-20 16:55:11,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:11,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:11,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:11,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:55:11,274 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)] === [2024-06-20 16:55:11,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:11,274 INFO L85 PathProgramCache]: Analyzing trace with hash 977656989, now seen corresponding path program 1 times [2024-06-20 16:55:11,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:11,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771813768] [2024-06-20 16:55:11,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:11,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:11,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:14,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:14,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771813768] [2024-06-20 16:55:14,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771813768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:14,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:14,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:14,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082655] [2024-06-20 16:55:14,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:14,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:14,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:14,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:14,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:14,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:55:14,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 214 transitions, 2660 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:14,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:14,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:55:14,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:16,395 INFO L124 PetriNetUnfolderBase]: 2122/3489 cut-off events. [2024-06-20 16:55:16,395 INFO L125 PetriNetUnfolderBase]: For 72118/72126 co-relation queries the response was YES. [2024-06-20 16:55:16,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20423 conditions, 3489 events. 2122/3489 cut-off events. For 72118/72126 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 20345 event pairs, 462 based on Foata normal form. 20/3504 useless extension candidates. Maximal degree in co-relation 20348. Up to 2798 conditions per place. [2024-06-20 16:55:16,425 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 223 selfloop transitions, 46 changer transitions 0/274 dead transitions. [2024-06-20 16:55:16,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 274 transitions, 3407 flow [2024-06-20 16:55:16,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:55:16,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:55:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-20 16:55:16,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264069264069264 [2024-06-20 16:55:16,431 INFO L175 Difference]: Start difference. First operand has 159 places, 214 transitions, 2660 flow. Second operand 11 states and 197 transitions. [2024-06-20 16:55:16,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 274 transitions, 3407 flow [2024-06-20 16:55:16,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 274 transitions, 3324 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-20 16:55:16,529 INFO L231 Difference]: Finished difference. Result has 161 places, 215 transitions, 2693 flow [2024-06-20 16:55:16,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2577, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2693, PETRI_PLACES=161, PETRI_TRANSITIONS=215} [2024-06-20 16:55:16,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-20 16:55:16,530 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 215 transitions, 2693 flow [2024-06-20 16:55:16,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:16,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:16,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:16,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:55:16,531 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)] === [2024-06-20 16:55:16,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:16,531 INFO L85 PathProgramCache]: Analyzing trace with hash -833955265, now seen corresponding path program 7 times [2024-06-20 16:55:16,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:16,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189228842] [2024-06-20 16:55:16,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:16,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:19,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:19,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189228842] [2024-06-20 16:55:19,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189228842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:19,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:19,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:19,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914444893] [2024-06-20 16:55:19,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:19,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:19,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:19,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:19,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:19,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:55:19,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 215 transitions, 2693 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:19,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:19,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:55:19,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:21,550 INFO L124 PetriNetUnfolderBase]: 2190/3609 cut-off events. [2024-06-20 16:55:21,550 INFO L125 PetriNetUnfolderBase]: For 80080/80120 co-relation queries the response was YES. [2024-06-20 16:55:21,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21141 conditions, 3609 events. 2190/3609 cut-off events. For 80080/80120 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 21362 event pairs, 502 based on Foata normal form. 48/3648 useless extension candidates. Maximal degree in co-relation 21065. Up to 3029 conditions per place. [2024-06-20 16:55:21,579 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 199 selfloop transitions, 62 changer transitions 0/266 dead transitions. [2024-06-20 16:55:21,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 266 transitions, 3399 flow [2024-06-20 16:55:21,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:55:21,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:55:21,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-20 16:55:21,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-20 16:55:21,581 INFO L175 Difference]: Start difference. First operand has 161 places, 215 transitions, 2693 flow. Second operand 10 states and 179 transitions. [2024-06-20 16:55:21,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 266 transitions, 3399 flow [2024-06-20 16:55:21,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 266 transitions, 3297 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-20 16:55:21,686 INFO L231 Difference]: Finished difference. Result has 162 places, 216 transitions, 2747 flow [2024-06-20 16:55:21,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2591, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2747, PETRI_PLACES=162, PETRI_TRANSITIONS=216} [2024-06-20 16:55:21,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-20 16:55:21,687 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 216 transitions, 2747 flow [2024-06-20 16:55:21,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:21,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:21,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:21,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:55:21,688 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)] === [2024-06-20 16:55:21,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:21,688 INFO L85 PathProgramCache]: Analyzing trace with hash 685681297, now seen corresponding path program 8 times [2024-06-20 16:55:21,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:21,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816773806] [2024-06-20 16:55:21,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:21,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:21,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:25,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:25,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816773806] [2024-06-20 16:55:25,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816773806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:25,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:25,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:25,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418905416] [2024-06-20 16:55:25,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:25,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:25,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:25,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:25,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:25,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:55:25,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 216 transitions, 2747 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:25,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:25,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:55:25,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:26,745 INFO L124 PetriNetUnfolderBase]: 2258/3733 cut-off events. [2024-06-20 16:55:26,745 INFO L125 PetriNetUnfolderBase]: For 85312/85322 co-relation queries the response was YES. [2024-06-20 16:55:26,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21875 conditions, 3733 events. 2258/3733 cut-off events. For 85312/85322 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 22394 event pairs, 510 based on Foata normal form. 26/3754 useless extension candidates. Maximal degree in co-relation 21798. Up to 3033 conditions per place. [2024-06-20 16:55:26,776 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 195 selfloop transitions, 60 changer transitions 0/260 dead transitions. [2024-06-20 16:55:26,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 260 transitions, 3423 flow [2024-06-20 16:55:26,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:55:26,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:55:26,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 16:55:26,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-20 16:55:26,778 INFO L175 Difference]: Start difference. First operand has 162 places, 216 transitions, 2747 flow. Second operand 8 states and 153 transitions. [2024-06-20 16:55:26,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 260 transitions, 3423 flow [2024-06-20 16:55:26,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 260 transitions, 3288 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-20 16:55:26,907 INFO L231 Difference]: Finished difference. Result has 162 places, 217 transitions, 2769 flow [2024-06-20 16:55:26,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2612, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2769, PETRI_PLACES=162, PETRI_TRANSITIONS=217} [2024-06-20 16:55:26,908 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-20 16:55:26,908 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 217 transitions, 2769 flow [2024-06-20 16:55:26,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:26,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:26,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:26,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:55:26,909 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)] === [2024-06-20 16:55:26,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:26,909 INFO L85 PathProgramCache]: Analyzing trace with hash 685533427, now seen corresponding path program 9 times [2024-06-20 16:55:26,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:26,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166539499] [2024-06-20 16:55:26,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:26,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:29,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:29,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:29,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166539499] [2024-06-20 16:55:29,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166539499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:29,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:29,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:29,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733392386] [2024-06-20 16:55:29,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:29,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:29,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:29,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:29,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:29,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:55:29,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 217 transitions, 2769 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:29,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:29,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:55:29,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:31,141 INFO L124 PetriNetUnfolderBase]: 2306/3817 cut-off events. [2024-06-20 16:55:31,141 INFO L125 PetriNetUnfolderBase]: For 88718/88728 co-relation queries the response was YES. [2024-06-20 16:55:31,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22369 conditions, 3817 events. 2306/3817 cut-off events. For 88718/88728 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 23009 event pairs, 373 based on Foata normal form. 22/3834 useless extension candidates. Maximal degree in co-relation 22291. Up to 2393 conditions per place. [2024-06-20 16:55:31,175 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 197 selfloop transitions, 66 changer transitions 0/268 dead transitions. [2024-06-20 16:55:31,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 268 transitions, 3620 flow [2024-06-20 16:55:31,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:55:31,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:55:31,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-20 16:55:31,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-20 16:55:31,177 INFO L175 Difference]: Start difference. First operand has 162 places, 217 transitions, 2769 flow. Second operand 8 states and 158 transitions. [2024-06-20 16:55:31,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 268 transitions, 3620 flow [2024-06-20 16:55:31,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 268 transitions, 3494 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 16:55:31,317 INFO L231 Difference]: Finished difference. Result has 165 places, 220 transitions, 2866 flow [2024-06-20 16:55:31,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2643, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2866, PETRI_PLACES=165, PETRI_TRANSITIONS=220} [2024-06-20 16:55:31,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-20 16:55:31,318 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 220 transitions, 2866 flow [2024-06-20 16:55:31,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:31,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:31,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:31,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:55:31,318 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)] === [2024-06-20 16:55:31,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:31,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1620218045, now seen corresponding path program 10 times [2024-06-20 16:55:31,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:31,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355375699] [2024-06-20 16:55:31,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:31,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:34,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:34,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355375699] [2024-06-20 16:55:34,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355375699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:34,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:34,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:34,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088173035] [2024-06-20 16:55:34,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:34,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:34,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:34,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:34,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:34,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:55:34,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 220 transitions, 2866 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:34,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:34,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:55:34,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:36,376 INFO L124 PetriNetUnfolderBase]: 2278/3773 cut-off events. [2024-06-20 16:55:36,377 INFO L125 PetriNetUnfolderBase]: For 88667/88677 co-relation queries the response was YES. [2024-06-20 16:55:36,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22056 conditions, 3773 events. 2278/3773 cut-off events. For 88667/88677 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22744 event pairs, 506 based on Foata normal form. 26/3794 useless extension candidates. Maximal degree in co-relation 21976. Up to 3073 conditions per place. [2024-06-20 16:55:36,410 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 205 selfloop transitions, 64 changer transitions 0/274 dead transitions. [2024-06-20 16:55:36,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 274 transitions, 3603 flow [2024-06-20 16:55:36,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:55:36,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:55:36,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-20 16:55:36,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 16:55:36,412 INFO L175 Difference]: Start difference. First operand has 165 places, 220 transitions, 2866 flow. Second operand 10 states and 185 transitions. [2024-06-20 16:55:36,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 274 transitions, 3603 flow [2024-06-20 16:55:36,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 274 transitions, 3383 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-20 16:55:36,570 INFO L231 Difference]: Finished difference. Result has 167 places, 221 transitions, 2816 flow [2024-06-20 16:55:36,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2658, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2816, PETRI_PLACES=167, PETRI_TRANSITIONS=221} [2024-06-20 16:55:36,572 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-20 16:55:36,572 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 221 transitions, 2816 flow [2024-06-20 16:55:36,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:36,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:36,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:36,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:55:36,573 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)] === [2024-06-20 16:55:36,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:36,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1814372657, now seen corresponding path program 2 times [2024-06-20 16:55:36,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:36,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546983197] [2024-06-20 16:55:36,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:36,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:39,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:39,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546983197] [2024-06-20 16:55:39,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546983197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:39,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:39,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:39,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558862243] [2024-06-20 16:55:39,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:39,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:39,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:39,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:39,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:39,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:55:39,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 221 transitions, 2816 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:39,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:39,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:55:39,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:41,214 INFO L124 PetriNetUnfolderBase]: 2326/3873 cut-off events. [2024-06-20 16:55:41,214 INFO L125 PetriNetUnfolderBase]: For 85139/85179 co-relation queries the response was YES. [2024-06-20 16:55:41,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21835 conditions, 3873 events. 2326/3873 cut-off events. For 85139/85179 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 23595 event pairs, 516 based on Foata normal form. 44/3908 useless extension candidates. Maximal degree in co-relation 21756. Up to 3163 conditions per place. [2024-06-20 16:55:41,245 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 210 selfloop transitions, 65 changer transitions 0/280 dead transitions. [2024-06-20 16:55:41,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 280 transitions, 3571 flow [2024-06-20 16:55:41,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:55:41,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:55:41,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-20 16:55:41,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264069264069264 [2024-06-20 16:55:41,247 INFO L175 Difference]: Start difference. First operand has 167 places, 221 transitions, 2816 flow. Second operand 11 states and 197 transitions. [2024-06-20 16:55:41,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 280 transitions, 3571 flow [2024-06-20 16:55:41,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 280 transitions, 3443 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 16:55:41,363 INFO L231 Difference]: Finished difference. Result has 170 places, 222 transitions, 2844 flow [2024-06-20 16:55:41,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2688, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2844, PETRI_PLACES=170, PETRI_TRANSITIONS=222} [2024-06-20 16:55:41,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-20 16:55:41,373 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 222 transitions, 2844 flow [2024-06-20 16:55:41,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:41,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:41,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:41,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:55:41,373 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)] === [2024-06-20 16:55:41,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:41,374 INFO L85 PathProgramCache]: Analyzing trace with hash -568042783, now seen corresponding path program 3 times [2024-06-20 16:55:41,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:41,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663523739] [2024-06-20 16:55:41,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:41,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:44,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:44,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663523739] [2024-06-20 16:55:44,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663523739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:44,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:44,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:44,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521276397] [2024-06-20 16:55:44,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:44,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:44,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:44,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:44,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:44,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:55:44,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 222 transitions, 2844 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:44,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:44,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:55:44,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:45,579 INFO L124 PetriNetUnfolderBase]: 2374/3969 cut-off events. [2024-06-20 16:55:45,579 INFO L125 PetriNetUnfolderBase]: For 89776/89816 co-relation queries the response was YES. [2024-06-20 16:55:45,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22309 conditions, 3969 events. 2374/3969 cut-off events. For 89776/89816 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 24315 event pairs, 498 based on Foata normal form. 44/4004 useless extension candidates. Maximal degree in co-relation 22229. Up to 2427 conditions per place. [2024-06-20 16:55:45,612 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 197 selfloop transitions, 76 changer transitions 0/278 dead transitions. [2024-06-20 16:55:45,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 278 transitions, 3653 flow [2024-06-20 16:55:45,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:55:45,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:55:45,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-20 16:55:45,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-20 16:55:45,614 INFO L175 Difference]: Start difference. First operand has 170 places, 222 transitions, 2844 flow. Second operand 10 states and 183 transitions. [2024-06-20 16:55:45,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 278 transitions, 3653 flow [2024-06-20 16:55:45,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 278 transitions, 3511 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-20 16:55:45,753 INFO L231 Difference]: Finished difference. Result has 171 places, 223 transitions, 2880 flow [2024-06-20 16:55:45,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2702, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2880, PETRI_PLACES=171, PETRI_TRANSITIONS=223} [2024-06-20 16:55:45,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-20 16:55:45,755 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 223 transitions, 2880 flow [2024-06-20 16:55:45,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:45,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:45,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:45,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:55:45,755 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)] === [2024-06-20 16:55:45,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:45,756 INFO L85 PathProgramCache]: Analyzing trace with hash 691258879, now seen corresponding path program 4 times [2024-06-20 16:55:45,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:45,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225417393] [2024-06-20 16:55:45,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:45,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:48,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:48,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225417393] [2024-06-20 16:55:48,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225417393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:48,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:48,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:48,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696995201] [2024-06-20 16:55:48,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:48,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:48,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:48,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:48,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:49,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:55:49,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 223 transitions, 2880 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:49,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:49,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:55:49,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:50,740 INFO L124 PetriNetUnfolderBase]: 2354/3933 cut-off events. [2024-06-20 16:55:50,741 INFO L125 PetriNetUnfolderBase]: For 87092/87102 co-relation queries the response was YES. [2024-06-20 16:55:50,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21959 conditions, 3933 events. 2354/3933 cut-off events. For 87092/87102 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24028 event pairs, 490 based on Foata normal form. 22/3950 useless extension candidates. Maximal degree in co-relation 21878. Up to 2773 conditions per place. [2024-06-20 16:55:50,778 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 201 selfloop transitions, 72 changer transitions 0/278 dead transitions. [2024-06-20 16:55:50,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 278 transitions, 3539 flow [2024-06-20 16:55:50,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:55:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:55:50,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-20 16:55:50,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-20 16:55:50,780 INFO L175 Difference]: Start difference. First operand has 171 places, 223 transitions, 2880 flow. Second operand 10 states and 186 transitions. [2024-06-20 16:55:50,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 278 transitions, 3539 flow [2024-06-20 16:55:50,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 278 transitions, 3400 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 16:55:50,921 INFO L231 Difference]: Finished difference. Result has 173 places, 222 transitions, 2823 flow [2024-06-20 16:55:50,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2823, PETRI_PLACES=173, PETRI_TRANSITIONS=222} [2024-06-20 16:55:50,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-20 16:55:50,922 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 222 transitions, 2823 flow [2024-06-20 16:55:50,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:50,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:50,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:50,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:55:50,923 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:50,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:50,923 INFO L85 PathProgramCache]: Analyzing trace with hash 126817601, now seen corresponding path program 1 times [2024-06-20 16:55:50,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:50,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883297616] [2024-06-20 16:55:50,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:50,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:53,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:53,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883297616] [2024-06-20 16:55:53,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883297616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:53,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:53,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:55:53,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962977509] [2024-06-20 16:55:53,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:53,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:55:53,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:53,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:55:53,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:55:53,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:55:53,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 222 transitions, 2823 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:53,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:53,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:55:53,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:54,670 INFO L124 PetriNetUnfolderBase]: 2312/3882 cut-off events. [2024-06-20 16:55:54,671 INFO L125 PetriNetUnfolderBase]: For 89344/89397 co-relation queries the response was YES. [2024-06-20 16:55:54,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21999 conditions, 3882 events. 2312/3882 cut-off events. For 89344/89397 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 24087 event pairs, 509 based on Foata normal form. 49/3901 useless extension candidates. Maximal degree in co-relation 21917. Up to 3490 conditions per place. [2024-06-20 16:55:54,704 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 194 selfloop transitions, 52 changer transitions 0/261 dead transitions. [2024-06-20 16:55:54,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 261 transitions, 3605 flow [2024-06-20 16:55:54,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:55:54,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:55:54,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 16:55:54,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-20 16:55:54,706 INFO L175 Difference]: Start difference. First operand has 173 places, 222 transitions, 2823 flow. Second operand 8 states and 139 transitions. [2024-06-20 16:55:54,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 261 transitions, 3605 flow [2024-06-20 16:55:54,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 261 transitions, 3385 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-20 16:55:54,895 INFO L231 Difference]: Finished difference. Result has 171 places, 236 transitions, 2874 flow [2024-06-20 16:55:54,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2605, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2874, PETRI_PLACES=171, PETRI_TRANSITIONS=236} [2024-06-20 16:55:54,896 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-20 16:55:54,896 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 236 transitions, 2874 flow [2024-06-20 16:55:54,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:54,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:54,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:54,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:55:54,897 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:54,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:54,897 INFO L85 PathProgramCache]: Analyzing trace with hash -280071191, now seen corresponding path program 2 times [2024-06-20 16:55:54,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:54,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383619993] [2024-06-20 16:55:54,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:54,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:57,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:57,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383619993] [2024-06-20 16:55:57,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383619993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:57,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:57,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:55:57,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593891566] [2024-06-20 16:55:57,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:57,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:55:57,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:57,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:55:57,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:55:57,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:55:57,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 236 transitions, 2874 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:57,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:57,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:55:57,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:58,647 INFO L124 PetriNetUnfolderBase]: 2299/3865 cut-off events. [2024-06-20 16:55:58,647 INFO L125 PetriNetUnfolderBase]: For 85215/85256 co-relation queries the response was YES. [2024-06-20 16:55:58,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21317 conditions, 3865 events. 2299/3865 cut-off events. For 85215/85256 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 24048 event pairs, 510 based on Foata normal form. 37/3872 useless extension candidates. Maximal degree in co-relation 21235. Up to 3482 conditions per place. [2024-06-20 16:55:58,689 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 192 selfloop transitions, 50 changer transitions 0/257 dead transitions. [2024-06-20 16:55:58,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 257 transitions, 3422 flow [2024-06-20 16:55:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:55:58,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:55:58,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-20 16:55:58,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 16:55:58,691 INFO L175 Difference]: Start difference. First operand has 171 places, 236 transitions, 2874 flow. Second operand 6 states and 111 transitions. [2024-06-20 16:55:58,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 257 transitions, 3422 flow [2024-06-20 16:55:58,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 257 transitions, 3355 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-20 16:55:58,816 INFO L231 Difference]: Finished difference. Result has 175 places, 236 transitions, 2924 flow [2024-06-20 16:55:58,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2924, PETRI_PLACES=175, PETRI_TRANSITIONS=236} [2024-06-20 16:55:58,817 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-20 16:55:58,817 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 236 transitions, 2924 flow [2024-06-20 16:55:58,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:58,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:58,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:58,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:55:58,818 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)] === [2024-06-20 16:55:58,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:58,818 INFO L85 PathProgramCache]: Analyzing trace with hash -298423811, now seen corresponding path program 3 times [2024-06-20 16:55:58,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:58,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298248616] [2024-06-20 16:55:58,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:58,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:01,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:01,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298248616] [2024-06-20 16:56:01,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298248616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:01,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:01,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:56:01,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928742491] [2024-06-20 16:56:01,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:01,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:56:01,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:01,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:56:01,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:56:01,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:56:01,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 236 transitions, 2924 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:01,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:01,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:56:01,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:02,405 INFO L124 PetriNetUnfolderBase]: 2286/3845 cut-off events. [2024-06-20 16:56:02,406 INFO L125 PetriNetUnfolderBase]: For 87904/87970 co-relation queries the response was YES. [2024-06-20 16:56:02,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21250 conditions, 3845 events. 2286/3845 cut-off events. For 87904/87970 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23938 event pairs, 520 based on Foata normal form. 59/3864 useless extension candidates. Maximal degree in co-relation 21166. Up to 3440 conditions per place. [2024-06-20 16:56:02,441 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 187 selfloop transitions, 52 changer transitions 0/254 dead transitions. [2024-06-20 16:56:02,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 254 transitions, 3482 flow [2024-06-20 16:56:02,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:56:02,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:56:02,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-20 16:56:02,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:56:02,443 INFO L175 Difference]: Start difference. First operand has 175 places, 236 transitions, 2924 flow. Second operand 6 states and 105 transitions. [2024-06-20 16:56:02,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 254 transitions, 3482 flow [2024-06-20 16:56:02,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 254 transitions, 3371 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 16:56:02,608 INFO L231 Difference]: Finished difference. Result has 175 places, 239 transitions, 2963 flow [2024-06-20 16:56:02,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2813, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2963, PETRI_PLACES=175, PETRI_TRANSITIONS=239} [2024-06-20 16:56:02,609 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-20 16:56:02,609 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 239 transitions, 2963 flow [2024-06-20 16:56:02,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:02,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:02,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:02,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:56:02,609 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)] === [2024-06-20 16:56:02,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:02,610 INFO L85 PathProgramCache]: Analyzing trace with hash 474831227, now seen corresponding path program 1 times [2024-06-20 16:56:02,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:02,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163868055] [2024-06-20 16:56:02,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:02,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:02,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:04,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:04,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163868055] [2024-06-20 16:56:04,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163868055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:04,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:04,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:56:04,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826848923] [2024-06-20 16:56:04,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:04,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:56:04,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:04,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:56:04,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:56:04,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:56:04,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 239 transitions, 2963 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) [2024-06-20 16:56:04,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:04,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:56:04,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:05,656 INFO L124 PetriNetUnfolderBase]: 2402/4008 cut-off events. [2024-06-20 16:56:05,656 INFO L125 PetriNetUnfolderBase]: For 85691/85696 co-relation queries the response was YES. [2024-06-20 16:56:05,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22163 conditions, 4008 events. 2402/4008 cut-off events. For 85691/85696 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 24724 event pairs, 610 based on Foata normal form. 3/4008 useless extension candidates. Maximal degree in co-relation 22079. Up to 3751 conditions per place. [2024-06-20 16:56:05,690 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 237 selfloop transitions, 19 changer transitions 0/261 dead transitions. [2024-06-20 16:56:05,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 261 transitions, 3655 flow [2024-06-20 16:56:05,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:56:05,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:56:05,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-20 16:56:05,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-20 16:56:05,692 INFO L175 Difference]: Start difference. First operand has 175 places, 239 transitions, 2963 flow. Second operand 6 states and 103 transitions. [2024-06-20 16:56:05,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 261 transitions, 3655 flow [2024-06-20 16:56:05,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 261 transitions, 3527 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-20 16:56:05,828 INFO L231 Difference]: Finished difference. Result has 177 places, 245 transitions, 2949 flow [2024-06-20 16:56:05,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2835, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2949, PETRI_PLACES=177, PETRI_TRANSITIONS=245} [2024-06-20 16:56:05,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-20 16:56:05,829 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 245 transitions, 2949 flow [2024-06-20 16:56:05,829 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) [2024-06-20 16:56:05,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:05,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:05,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:56:05,829 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)] === [2024-06-20 16:56:05,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:05,830 INFO L85 PathProgramCache]: Analyzing trace with hash 278826243, now seen corresponding path program 2 times [2024-06-20 16:56:05,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:05,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112575301] [2024-06-20 16:56:05,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:05,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:07,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:07,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112575301] [2024-06-20 16:56:07,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112575301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:07,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:07,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:56:07,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380429771] [2024-06-20 16:56:07,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:07,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:56:07,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:07,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:56:07,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:56:07,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:56:07,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 245 transitions, 2949 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) [2024-06-20 16:56:07,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:07,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:56:07,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:08,784 INFO L124 PetriNetUnfolderBase]: 2399/4004 cut-off events. [2024-06-20 16:56:08,785 INFO L125 PetriNetUnfolderBase]: For 89088/89093 co-relation queries the response was YES. [2024-06-20 16:56:08,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22307 conditions, 4004 events. 2399/4004 cut-off events. For 89088/89093 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 24761 event pairs, 610 based on Foata normal form. 3/4004 useless extension candidates. Maximal degree in co-relation 22222. Up to 3751 conditions per place. [2024-06-20 16:56:08,819 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 238 selfloop transitions, 16 changer transitions 0/259 dead transitions. [2024-06-20 16:56:08,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 259 transitions, 3497 flow [2024-06-20 16:56:08,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:56:08,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:56:08,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-20 16:56:08,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:56:08,821 INFO L175 Difference]: Start difference. First operand has 177 places, 245 transitions, 2949 flow. Second operand 5 states and 90 transitions. [2024-06-20 16:56:08,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 259 transitions, 3497 flow [2024-06-20 16:56:08,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 259 transitions, 3442 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-20 16:56:08,995 INFO L231 Difference]: Finished difference. Result has 180 places, 245 transitions, 2936 flow [2024-06-20 16:56:08,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2894, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2936, PETRI_PLACES=180, PETRI_TRANSITIONS=245} [2024-06-20 16:56:08,996 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-20 16:56:08,996 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 245 transitions, 2936 flow [2024-06-20 16:56:08,996 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) [2024-06-20 16:56:08,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:08,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:08,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 16:56:08,999 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)] === [2024-06-20 16:56:08,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:08,999 INFO L85 PathProgramCache]: Analyzing trace with hash -298408931, now seen corresponding path program 1 times [2024-06-20 16:56:08,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:09,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314154322] [2024-06-20 16:56:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:09,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:11,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:11,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314154322] [2024-06-20 16:56:11,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314154322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:11,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:11,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:56:11,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199260741] [2024-06-20 16:56:11,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:11,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:56:11,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:11,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:56:11,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:56:11,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:56:11,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 245 transitions, 2936 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:11,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:11,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:56:11,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:12,696 INFO L124 PetriNetUnfolderBase]: 2275/3830 cut-off events. [2024-06-20 16:56:12,696 INFO L125 PetriNetUnfolderBase]: For 92483/92556 co-relation queries the response was YES. [2024-06-20 16:56:12,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21475 conditions, 3830 events. 2275/3830 cut-off events. For 92483/92556 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 23833 event pairs, 562 based on Foata normal form. 67/3867 useless extension candidates. Maximal degree in co-relation 21388. Up to 3533 conditions per place. [2024-06-20 16:56:12,726 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 230 selfloop transitions, 15 changer transitions 0/260 dead transitions. [2024-06-20 16:56:12,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 260 transitions, 3488 flow [2024-06-20 16:56:12,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:56:12,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:56:12,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-20 16:56:12,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:56:12,727 INFO L175 Difference]: Start difference. First operand has 180 places, 245 transitions, 2936 flow. Second operand 6 states and 102 transitions. [2024-06-20 16:56:12,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 260 transitions, 3488 flow [2024-06-20 16:56:12,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 260 transitions, 3456 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 16:56:12,889 INFO L231 Difference]: Finished difference. Result has 182 places, 247 transitions, 2971 flow [2024-06-20 16:56:12,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2904, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2971, PETRI_PLACES=182, PETRI_TRANSITIONS=247} [2024-06-20 16:56:12,890 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-20 16:56:12,890 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 247 transitions, 2971 flow [2024-06-20 16:56:12,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:12,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:12,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:12,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 16:56:12,890 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)] === [2024-06-20 16:56:12,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:12,891 INFO L85 PathProgramCache]: Analyzing trace with hash 879341578, now seen corresponding path program 1 times [2024-06-20 16:56:12,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:12,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531958512] [2024-06-20 16:56:12,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:12,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:16,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:16,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531958512] [2024-06-20 16:56:16,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531958512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:16,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:16,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:56:16,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708106898] [2024-06-20 16:56:16,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:16,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:56:16,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:16,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:56:16,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:56:16,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:56:16,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 247 transitions, 2971 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) [2024-06-20 16:56:16,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:16,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:56:16,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:17,535 INFO L124 PetriNetUnfolderBase]: 2425/4045 cut-off events. [2024-06-20 16:56:17,535 INFO L125 PetriNetUnfolderBase]: For 96050/96058 co-relation queries the response was YES. [2024-06-20 16:56:17,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22760 conditions, 4045 events. 2425/4045 cut-off events. For 96050/96058 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 24829 event pairs, 530 based on Foata normal form. 10/4053 useless extension candidates. Maximal degree in co-relation 22672. Up to 3681 conditions per place. [2024-06-20 16:56:17,568 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 253 selfloop transitions, 44 changer transitions 0/302 dead transitions. [2024-06-20 16:56:17,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 302 transitions, 3917 flow [2024-06-20 16:56:17,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:56:17,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:56:17,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-20 16:56:17,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-20 16:56:17,575 INFO L175 Difference]: Start difference. First operand has 182 places, 247 transitions, 2971 flow. Second operand 10 states and 166 transitions. [2024-06-20 16:56:17,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 302 transitions, 3917 flow [2024-06-20 16:56:17,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 302 transitions, 3866 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 16:56:17,758 INFO L231 Difference]: Finished difference. Result has 190 places, 264 transitions, 3201 flow [2024-06-20 16:56:17,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2920, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3201, PETRI_PLACES=190, PETRI_TRANSITIONS=264} [2024-06-20 16:56:17,759 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-20 16:56:17,759 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 264 transitions, 3201 flow [2024-06-20 16:56:17,759 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) [2024-06-20 16:56:17,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:17,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:17,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 16:56:17,760 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)] === [2024-06-20 16:56:17,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:17,760 INFO L85 PathProgramCache]: Analyzing trace with hash -363620504, now seen corresponding path program 2 times [2024-06-20 16:56:17,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:17,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627953084] [2024-06-20 16:56:17,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:17,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:17,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:20,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:20,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627953084] [2024-06-20 16:56:20,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627953084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:20,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:20,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:56:20,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514828516] [2024-06-20 16:56:20,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:20,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:56:20,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:20,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:56:20,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:56:20,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:56:20,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 264 transitions, 3201 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) [2024-06-20 16:56:20,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:20,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:56:20,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:22,133 INFO L124 PetriNetUnfolderBase]: 2456/4088 cut-off events. [2024-06-20 16:56:22,134 INFO L125 PetriNetUnfolderBase]: For 103346/103348 co-relation queries the response was YES. [2024-06-20 16:56:22,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23664 conditions, 4088 events. 2456/4088 cut-off events. For 103346/103348 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 25097 event pairs, 538 based on Foata normal form. 2/4088 useless extension candidates. Maximal degree in co-relation 23573. Up to 3710 conditions per place. [2024-06-20 16:56:22,171 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 249 selfloop transitions, 50 changer transitions 0/304 dead transitions. [2024-06-20 16:56:22,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 304 transitions, 4180 flow [2024-06-20 16:56:22,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:56:22,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:56:22,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 16:56:22,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-20 16:56:22,174 INFO L175 Difference]: Start difference. First operand has 190 places, 264 transitions, 3201 flow. Second operand 9 states and 150 transitions. [2024-06-20 16:56:22,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 304 transitions, 4180 flow [2024-06-20 16:56:22,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 304 transitions, 4048 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-20 16:56:22,338 INFO L231 Difference]: Finished difference. Result has 195 places, 276 transitions, 3330 flow [2024-06-20 16:56:22,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3097, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3330, PETRI_PLACES=195, PETRI_TRANSITIONS=276} [2024-06-20 16:56:22,342 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-20 16:56:22,342 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 276 transitions, 3330 flow [2024-06-20 16:56:22,342 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) [2024-06-20 16:56:22,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:22,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:22,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 16:56:22,343 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)] === [2024-06-20 16:56:22,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:22,343 INFO L85 PathProgramCache]: Analyzing trace with hash -363631664, now seen corresponding path program 3 times [2024-06-20 16:56:22,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:22,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121672121] [2024-06-20 16:56:22,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:22,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:25,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:25,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121672121] [2024-06-20 16:56:25,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121672121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:25,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:25,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:56:25,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527497391] [2024-06-20 16:56:25,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:25,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:56:25,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:25,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:56:25,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:56:25,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:56:25,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 276 transitions, 3330 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) [2024-06-20 16:56:25,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:25,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:56:25,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:26,649 INFO L124 PetriNetUnfolderBase]: 2450/4080 cut-off events. [2024-06-20 16:56:26,649 INFO L125 PetriNetUnfolderBase]: For 105801/105803 co-relation queries the response was YES. [2024-06-20 16:56:26,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23630 conditions, 4080 events. 2450/4080 cut-off events. For 105801/105803 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 25053 event pairs, 537 based on Foata normal form. 2/4080 useless extension candidates. Maximal degree in co-relation 23537. Up to 3705 conditions per place. [2024-06-20 16:56:26,684 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 249 selfloop transitions, 52 changer transitions 0/306 dead transitions. [2024-06-20 16:56:26,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 306 transitions, 4100 flow [2024-06-20 16:56:26,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:56:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:56:26,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-20 16:56:26,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37662337662337664 [2024-06-20 16:56:26,686 INFO L175 Difference]: Start difference. First operand has 195 places, 276 transitions, 3330 flow. Second operand 11 states and 174 transitions. [2024-06-20 16:56:26,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 306 transitions, 4100 flow [2024-06-20 16:56:26,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 306 transitions, 4036 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 16:56:26,882 INFO L231 Difference]: Finished difference. Result has 203 places, 276 transitions, 3377 flow [2024-06-20 16:56:26,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3266, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3377, PETRI_PLACES=203, PETRI_TRANSITIONS=276} [2024-06-20 16:56:26,882 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-20 16:56:26,882 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 276 transitions, 3377 flow [2024-06-20 16:56:26,883 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) [2024-06-20 16:56:26,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:26,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:26,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 16:56:26,883 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)] === [2024-06-20 16:56:26,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:26,883 INFO L85 PathProgramCache]: Analyzing trace with hash -674089398, now seen corresponding path program 4 times [2024-06-20 16:56:26,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:26,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670041145] [2024-06-20 16:56:26,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:26,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:29,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:29,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670041145] [2024-06-20 16:56:29,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670041145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:29,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:29,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:56:29,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401999841] [2024-06-20 16:56:29,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:29,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:56:29,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:29,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:56:29,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:56:29,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:56:29,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 276 transitions, 3377 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) [2024-06-20 16:56:29,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:29,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:56:29,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:30,965 INFO L124 PetriNetUnfolderBase]: 2460/4096 cut-off events. [2024-06-20 16:56:30,965 INFO L125 PetriNetUnfolderBase]: For 110860/110862 co-relation queries the response was YES. [2024-06-20 16:56:30,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23823 conditions, 4096 events. 2460/4096 cut-off events. For 110860/110862 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 25138 event pairs, 539 based on Foata normal form. 2/4096 useless extension candidates. Maximal degree in co-relation 23729. Up to 3715 conditions per place. [2024-06-20 16:56:31,000 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 246 selfloop transitions, 52 changer transitions 0/303 dead transitions. [2024-06-20 16:56:31,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 303 transitions, 4160 flow [2024-06-20 16:56:31,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:56:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:56:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 16:56:31,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-20 16:56:31,002 INFO L175 Difference]: Start difference. First operand has 203 places, 276 transitions, 3377 flow. Second operand 7 states and 122 transitions. [2024-06-20 16:56:31,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 303 transitions, 4160 flow [2024-06-20 16:56:31,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 303 transitions, 4048 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 16:56:31,200 INFO L231 Difference]: Finished difference. Result has 202 places, 279 transitions, 3408 flow [2024-06-20 16:56:31,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3271, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3408, PETRI_PLACES=202, PETRI_TRANSITIONS=279} [2024-06-20 16:56:31,200 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-20 16:56:31,200 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 279 transitions, 3408 flow [2024-06-20 16:56:31,201 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) [2024-06-20 16:56:31,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:31,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:31,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 16:56:31,201 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)] === [2024-06-20 16:56:31,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:31,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1484446182, now seen corresponding path program 5 times [2024-06-20 16:56:31,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:31,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910030713] [2024-06-20 16:56:31,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:31,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:31,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:34,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:34,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:34,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910030713] [2024-06-20 16:56:34,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910030713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:34,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:34,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:56:34,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666777697] [2024-06-20 16:56:34,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:34,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:56:34,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:34,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:56:34,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:56:34,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:56:34,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 279 transitions, 3408 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) [2024-06-20 16:56:34,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:34,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:56:34,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:35,601 INFO L124 PetriNetUnfolderBase]: 2454/4092 cut-off events. [2024-06-20 16:56:35,601 INFO L125 PetriNetUnfolderBase]: For 113422/113432 co-relation queries the response was YES. [2024-06-20 16:56:35,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23820 conditions, 4092 events. 2454/4092 cut-off events. For 113422/113432 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 25200 event pairs, 531 based on Foata normal form. 12/4102 useless extension candidates. Maximal degree in co-relation 23725. Up to 3710 conditions per place. [2024-06-20 16:56:35,634 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 252 selfloop transitions, 57 changer transitions 0/314 dead transitions. [2024-06-20 16:56:35,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 314 transitions, 4136 flow [2024-06-20 16:56:35,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:56:35,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:56:35,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:56:35,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:56:35,636 INFO L175 Difference]: Start difference. First operand has 202 places, 279 transitions, 3408 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:56:35,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 314 transitions, 4136 flow [2024-06-20 16:56:35,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 314 transitions, 4038 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 16:56:35,851 INFO L231 Difference]: Finished difference. Result has 206 places, 279 transitions, 3441 flow [2024-06-20 16:56:35,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3310, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3441, PETRI_PLACES=206, PETRI_TRANSITIONS=279} [2024-06-20 16:56:35,852 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-20 16:56:35,852 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 279 transitions, 3441 flow [2024-06-20 16:56:35,852 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) [2024-06-20 16:56:35,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:35,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:35,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 16:56:35,852 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)] === [2024-06-20 16:56:35,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:35,853 INFO L85 PathProgramCache]: Analyzing trace with hash -661202388, now seen corresponding path program 6 times [2024-06-20 16:56:35,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:35,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322619774] [2024-06-20 16:56:35,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:35,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:38,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:38,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322619774] [2024-06-20 16:56:38,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322619774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:38,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:38,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:56:38,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551318057] [2024-06-20 16:56:38,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:38,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:56:38,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:38,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:56:38,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:56:38,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:56:38,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 279 transitions, 3441 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) [2024-06-20 16:56:38,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:38,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:56:38,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:39,797 INFO L124 PetriNetUnfolderBase]: 2448/4079 cut-off events. [2024-06-20 16:56:39,797 INFO L125 PetriNetUnfolderBase]: For 112638/112646 co-relation queries the response was YES. [2024-06-20 16:56:39,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23739 conditions, 4079 events. 2448/4079 cut-off events. For 112638/112646 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 25015 event pairs, 556 based on Foata normal form. 4/4075 useless extension candidates. Maximal degree in co-relation 23644. Up to 3680 conditions per place. [2024-06-20 16:56:39,837 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 243 selfloop transitions, 57 changer transitions 0/305 dead transitions. [2024-06-20 16:56:39,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 305 transitions, 4153 flow [2024-06-20 16:56:39,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:56:39,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:56:39,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 16:56:39,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-20 16:56:39,838 INFO L175 Difference]: Start difference. First operand has 206 places, 279 transitions, 3441 flow. Second operand 7 states and 115 transitions. [2024-06-20 16:56:39,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 305 transitions, 4153 flow [2024-06-20 16:56:40,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 305 transitions, 4028 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 16:56:40,067 INFO L231 Difference]: Finished difference. Result has 206 places, 288 transitions, 3544 flow [2024-06-20 16:56:40,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3316, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3544, PETRI_PLACES=206, PETRI_TRANSITIONS=288} [2024-06-20 16:56:40,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-20 16:56:40,067 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 288 transitions, 3544 flow [2024-06-20 16:56:40,068 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) [2024-06-20 16:56:40,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:40,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:40,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 16:56:40,068 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)] === [2024-06-20 16:56:40,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:40,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1622279546, now seen corresponding path program 1 times [2024-06-20 16:56:40,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:40,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111821303] [2024-06-20 16:56:40,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:40,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:42,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:42,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111821303] [2024-06-20 16:56:42,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111821303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:42,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:42,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:56:42,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632309674] [2024-06-20 16:56:42,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:42,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:56:42,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:42,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:56:42,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:56:42,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:56:42,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 288 transitions, 3544 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) [2024-06-20 16:56:42,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:42,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:56:42,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:43,851 INFO L124 PetriNetUnfolderBase]: 2458/4107 cut-off events. [2024-06-20 16:56:43,852 INFO L125 PetriNetUnfolderBase]: For 108709/108714 co-relation queries the response was YES. [2024-06-20 16:56:43,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24091 conditions, 4107 events. 2458/4107 cut-off events. For 108709/108714 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 25485 event pairs, 611 based on Foata normal form. 4/4108 useless extension candidates. Maximal degree in co-relation 23995. Up to 3796 conditions per place. [2024-06-20 16:56:43,892 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 282 selfloop transitions, 27 changer transitions 0/314 dead transitions. [2024-06-20 16:56:43,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 314 transitions, 4370 flow [2024-06-20 16:56:43,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:56:43,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:56:43,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 16:56:43,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-20 16:56:43,893 INFO L175 Difference]: Start difference. First operand has 206 places, 288 transitions, 3544 flow. Second operand 7 states and 120 transitions. [2024-06-20 16:56:43,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 314 transitions, 4370 flow [2024-06-20 16:56:44,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 314 transitions, 4314 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-20 16:56:44,128 INFO L231 Difference]: Finished difference. Result has 211 places, 294 transitions, 3626 flow [2024-06-20 16:56:44,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3488, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3626, PETRI_PLACES=211, PETRI_TRANSITIONS=294} [2024-06-20 16:56:44,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-20 16:56:44,129 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 294 transitions, 3626 flow [2024-06-20 16:56:44,132 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) [2024-06-20 16:56:44,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:44,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:44,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 16:56:44,133 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)] === [2024-06-20 16:56:44,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:44,133 INFO L85 PathProgramCache]: Analyzing trace with hash 53686054, now seen corresponding path program 2 times [2024-06-20 16:56:44,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:44,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827983732] [2024-06-20 16:56:44,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:44,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:46,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:46,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827983732] [2024-06-20 16:56:46,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827983732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:46,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:46,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:56:46,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692993907] [2024-06-20 16:56:46,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:46,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:56:46,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:46,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:56:46,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:56:46,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:56:46,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 294 transitions, 3626 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) [2024-06-20 16:56:46,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:46,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:56:46,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:47,907 INFO L124 PetriNetUnfolderBase]: 2468/4121 cut-off events. [2024-06-20 16:56:47,907 INFO L125 PetriNetUnfolderBase]: For 113837/113842 co-relation queries the response was YES. [2024-06-20 16:56:47,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24619 conditions, 4121 events. 2468/4121 cut-off events. For 113837/113842 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 25500 event pairs, 608 based on Foata normal form. 4/4122 useless extension candidates. Maximal degree in co-relation 24521. Up to 3815 conditions per place. [2024-06-20 16:56:47,947 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 286 selfloop transitions, 27 changer transitions 0/318 dead transitions. [2024-06-20 16:56:47,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 318 transitions, 4434 flow [2024-06-20 16:56:47,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:56:47,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:56:47,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 16:56:47,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-20 16:56:47,949 INFO L175 Difference]: Start difference. First operand has 211 places, 294 transitions, 3626 flow. Second operand 8 states and 131 transitions. [2024-06-20 16:56:47,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 318 transitions, 4434 flow [2024-06-20 16:56:48,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 318 transitions, 4378 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-20 16:56:48,194 INFO L231 Difference]: Finished difference. Result has 216 places, 297 transitions, 3672 flow [2024-06-20 16:56:48,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3574, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3672, PETRI_PLACES=216, PETRI_TRANSITIONS=297} [2024-06-20 16:56:48,194 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-20 16:56:48,194 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 297 transitions, 3672 flow [2024-06-20 16:56:48,195 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) [2024-06-20 16:56:48,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:48,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:48,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 16:56:48,195 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)] === [2024-06-20 16:56:48,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:48,195 INFO L85 PathProgramCache]: Analyzing trace with hash 53680474, now seen corresponding path program 3 times [2024-06-20 16:56:48,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:48,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114517984] [2024-06-20 16:56:48,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:48,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:50,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:50,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114517984] [2024-06-20 16:56:50,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114517984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:50,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:50,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:56:50,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686466271] [2024-06-20 16:56:50,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:50,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:56:50,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:50,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:56:50,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:56:50,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:56:50,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 297 transitions, 3672 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) [2024-06-20 16:56:50,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:50,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:56:50,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:51,620 INFO L124 PetriNetUnfolderBase]: 2462/4113 cut-off events. [2024-06-20 16:56:51,620 INFO L125 PetriNetUnfolderBase]: For 116324/116329 co-relation queries the response was YES. [2024-06-20 16:56:51,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24625 conditions, 4113 events. 2462/4113 cut-off events. For 116324/116329 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 25420 event pairs, 611 based on Foata normal form. 4/4114 useless extension candidates. Maximal degree in co-relation 24525. Up to 3810 conditions per place. [2024-06-20 16:56:51,654 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 285 selfloop transitions, 25 changer transitions 0/315 dead transitions. [2024-06-20 16:56:51,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 315 transitions, 4340 flow [2024-06-20 16:56:51,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:56:51,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:56:51,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-20 16:56:51,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-20 16:56:51,656 INFO L175 Difference]: Start difference. First operand has 216 places, 297 transitions, 3672 flow. Second operand 6 states and 107 transitions. [2024-06-20 16:56:51,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 315 transitions, 4340 flow [2024-06-20 16:56:51,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 315 transitions, 4228 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 16:56:51,862 INFO L231 Difference]: Finished difference. Result has 216 places, 297 transitions, 3616 flow [2024-06-20 16:56:51,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3560, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3616, PETRI_PLACES=216, PETRI_TRANSITIONS=297} [2024-06-20 16:56:51,862 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-20 16:56:51,862 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 297 transitions, 3616 flow [2024-06-20 16:56:51,862 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) [2024-06-20 16:56:51,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:51,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:51,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 16:56:51,863 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)] === [2024-06-20 16:56:51,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:51,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1435182598, now seen corresponding path program 1 times [2024-06-20 16:56:51,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:51,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396290141] [2024-06-20 16:56:51,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:51,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:55,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:55,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:55,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396290141] [2024-06-20 16:56:55,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396290141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:55,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:55,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:56:55,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102902965] [2024-06-20 16:56:55,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:55,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:56:55,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:55,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:56:55,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:56:55,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:56:55,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 297 transitions, 3616 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) [2024-06-20 16:56:55,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:55,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:56:55,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:56,802 INFO L124 PetriNetUnfolderBase]: 2475/4128 cut-off events. [2024-06-20 16:56:56,802 INFO L125 PetriNetUnfolderBase]: For 119784/119794 co-relation queries the response was YES. [2024-06-20 16:56:56,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24805 conditions, 4128 events. 2475/4128 cut-off events. For 119784/119794 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 25425 event pairs, 541 based on Foata normal form. 11/4134 useless extension candidates. Maximal degree in co-relation 24704. Up to 3692 conditions per place. [2024-06-20 16:56:56,845 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 270 selfloop transitions, 64 changer transitions 0/339 dead transitions. [2024-06-20 16:56:56,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 339 transitions, 4696 flow [2024-06-20 16:56:56,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:56:56,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:56:56,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 16:56:56,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-20 16:56:56,847 INFO L175 Difference]: Start difference. First operand has 216 places, 297 transitions, 3616 flow. Second operand 8 states and 145 transitions. [2024-06-20 16:56:56,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 339 transitions, 4696 flow [2024-06-20 16:56:57,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 339 transitions, 4646 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-20 16:56:57,104 INFO L231 Difference]: Finished difference. Result has 219 places, 306 transitions, 3838 flow [2024-06-20 16:56:57,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3566, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3838, PETRI_PLACES=219, PETRI_TRANSITIONS=306} [2024-06-20 16:56:57,105 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-20 16:56:57,105 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 306 transitions, 3838 flow [2024-06-20 16:56:57,105 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) [2024-06-20 16:56:57,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:57,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:57,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 16:56:57,105 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)] === [2024-06-20 16:56:57,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:57,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1435302568, now seen corresponding path program 2 times [2024-06-20 16:56:57,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:57,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298664390] [2024-06-20 16:56:57,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:57,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:00,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:00,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298664390] [2024-06-20 16:57:00,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298664390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:00,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:00,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:57:00,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023472187] [2024-06-20 16:57:00,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:00,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:57:00,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:00,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:57:00,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:57:00,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:57:00,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 306 transitions, 3838 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) [2024-06-20 16:57:00,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:00,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:57:00,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:01,633 INFO L124 PetriNetUnfolderBase]: 2490/4153 cut-off events. [2024-06-20 16:57:01,633 INFO L125 PetriNetUnfolderBase]: For 126273/126286 co-relation queries the response was YES. [2024-06-20 16:57:01,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25497 conditions, 4153 events. 2490/4153 cut-off events. For 126273/126286 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 25686 event pairs, 534 based on Foata normal form. 13/4163 useless extension candidates. Maximal degree in co-relation 25395. Up to 3793 conditions per place. [2024-06-20 16:57:01,676 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 280 selfloop transitions, 57 changer transitions 0/342 dead transitions. [2024-06-20 16:57:01,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 342 transitions, 4729 flow [2024-06-20 16:57:01,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:57:01,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:57:01,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 16:57:01,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:57:01,678 INFO L175 Difference]: Start difference. First operand has 219 places, 306 transitions, 3838 flow. Second operand 8 states and 136 transitions. [2024-06-20 16:57:01,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 342 transitions, 4729 flow [2024-06-20 16:57:01,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 342 transitions, 4622 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-20 16:57:01,967 INFO L231 Difference]: Finished difference. Result has 224 places, 315 transitions, 3991 flow [2024-06-20 16:57:01,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3749, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3991, PETRI_PLACES=224, PETRI_TRANSITIONS=315} [2024-06-20 16:57:01,968 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-20 16:57:01,968 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 315 transitions, 3991 flow [2024-06-20 16:57:01,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:01,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:01,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:01,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 16:57:01,968 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)] === [2024-06-20 16:57:01,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:01,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1776786256, now seen corresponding path program 3 times [2024-06-20 16:57:01,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:01,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287396902] [2024-06-20 16:57:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:01,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:05,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:05,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287396902] [2024-06-20 16:57:05,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287396902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:05,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:05,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:57:05,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105243282] [2024-06-20 16:57:05,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:05,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:57:05,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:05,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:57:05,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:57:05,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:57:05,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 315 transitions, 3991 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) [2024-06-20 16:57:05,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:05,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:57:05,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:06,746 INFO L124 PetriNetUnfolderBase]: 2503/4176 cut-off events. [2024-06-20 16:57:06,746 INFO L125 PetriNetUnfolderBase]: For 132694/132709 co-relation queries the response was YES. [2024-06-20 16:57:06,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25883 conditions, 4176 events. 2503/4176 cut-off events. For 132694/132709 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 25810 event pairs, 537 based on Foata normal form. 15/4188 useless extension candidates. Maximal degree in co-relation 25779. Up to 3800 conditions per place. [2024-06-20 16:57:06,784 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 277 selfloop transitions, 63 changer transitions 0/345 dead transitions. [2024-06-20 16:57:06,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 345 transitions, 4923 flow [2024-06-20 16:57:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:57:06,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:57:06,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-20 16:57:06,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-20 16:57:06,786 INFO L175 Difference]: Start difference. First operand has 224 places, 315 transitions, 3991 flow. Second operand 9 states and 145 transitions. [2024-06-20 16:57:06,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 345 transitions, 4923 flow [2024-06-20 16:57:07,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 345 transitions, 4790 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 16:57:07,058 INFO L231 Difference]: Finished difference. Result has 229 places, 321 transitions, 4101 flow [2024-06-20 16:57:07,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3858, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4101, PETRI_PLACES=229, PETRI_TRANSITIONS=321} [2024-06-20 16:57:07,058 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-20 16:57:07,058 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 321 transitions, 4101 flow [2024-06-20 16:57:07,059 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) [2024-06-20 16:57:07,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:07,059 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] [2024-06-20 16:57:07,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 16:57:07,059 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)] === [2024-06-20 16:57:07,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:07,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1612680352, now seen corresponding path program 1 times [2024-06-20 16:57:07,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:07,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330079705] [2024-06-20 16:57:07,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:07,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:10,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:10,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330079705] [2024-06-20 16:57:10,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330079705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:10,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:10,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:57:10,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153591680] [2024-06-20 16:57:10,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:10,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:57:10,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:10,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:57:10,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:57:10,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:57:10,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 321 transitions, 4101 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:10,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:10,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:57:10,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:12,232 INFO L124 PetriNetUnfolderBase]: 2414/4053 cut-off events. [2024-06-20 16:57:12,232 INFO L125 PetriNetUnfolderBase]: For 141411/141456 co-relation queries the response was YES. [2024-06-20 16:57:12,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25419 conditions, 4053 events. 2414/4053 cut-off events. For 141411/141456 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 25307 event pairs, 503 based on Foata normal form. 41/4064 useless extension candidates. Maximal degree in co-relation 25313. Up to 3597 conditions per place. [2024-06-20 16:57:12,277 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 256 selfloop transitions, 65 changer transitions 0/349 dead transitions. [2024-06-20 16:57:12,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 349 transitions, 4853 flow [2024-06-20 16:57:12,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:57:12,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:57:12,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 16:57:12,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-20 16:57:12,278 INFO L175 Difference]: Start difference. First operand has 229 places, 321 transitions, 4101 flow. Second operand 9 states and 151 transitions. [2024-06-20 16:57:12,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 349 transitions, 4853 flow [2024-06-20 16:57:12,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 349 transitions, 4698 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 16:57:12,517 INFO L231 Difference]: Finished difference. Result has 233 places, 323 transitions, 4122 flow [2024-06-20 16:57:12,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3946, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4122, PETRI_PLACES=233, PETRI_TRANSITIONS=323} [2024-06-20 16:57:12,518 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-20 16:57:12,518 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 323 transitions, 4122 flow [2024-06-20 16:57:12,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:12,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:12,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:12,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 16:57:12,518 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)] === [2024-06-20 16:57:12,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:12,519 INFO L85 PathProgramCache]: Analyzing trace with hash 87782628, now seen corresponding path program 4 times [2024-06-20 16:57:12,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:12,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400729590] [2024-06-20 16:57:12,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:12,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:12,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:15,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:15,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400729590] [2024-06-20 16:57:15,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400729590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:15,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:15,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:57:15,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434468208] [2024-06-20 16:57:15,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:15,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:57:15,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:15,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:57:15,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:57:15,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:57:15,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 323 transitions, 4122 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) [2024-06-20 16:57:15,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:15,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:57:15,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:16,686 INFO L124 PetriNetUnfolderBase]: 2532/4222 cut-off events. [2024-06-20 16:57:16,686 INFO L125 PetriNetUnfolderBase]: For 146391/146437 co-relation queries the response was YES. [2024-06-20 16:57:16,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26561 conditions, 4222 events. 2532/4222 cut-off events. For 146391/146437 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 26183 event pairs, 563 based on Foata normal form. 37/4250 useless extension candidates. Maximal degree in co-relation 26454. Up to 3760 conditions per place. [2024-06-20 16:57:16,732 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 263 selfloop transitions, 85 changer transitions 0/353 dead transitions. [2024-06-20 16:57:16,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 353 transitions, 5186 flow [2024-06-20 16:57:16,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:57:16,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:57:16,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 16:57:16,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-20 16:57:16,733 INFO L175 Difference]: Start difference. First operand has 233 places, 323 transitions, 4122 flow. Second operand 7 states and 123 transitions. [2024-06-20 16:57:16,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 353 transitions, 5186 flow [2024-06-20 16:57:17,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 353 transitions, 5028 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 16:57:17,073 INFO L231 Difference]: Finished difference. Result has 233 places, 329 transitions, 4240 flow [2024-06-20 16:57:17,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3964, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4240, PETRI_PLACES=233, PETRI_TRANSITIONS=329} [2024-06-20 16:57:17,074 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-20 16:57:17,074 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 329 transitions, 4240 flow [2024-06-20 16:57:17,074 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) [2024-06-20 16:57:17,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:17,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:17,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 16:57:17,075 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)] === [2024-06-20 16:57:17,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:17,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1855433414, now seen corresponding path program 5 times [2024-06-20 16:57:17,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:17,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762322819] [2024-06-20 16:57:17,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:17,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:19,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:19,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762322819] [2024-06-20 16:57:19,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762322819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:19,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:19,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:57:19,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893550531] [2024-06-20 16:57:19,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:19,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:57:19,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:19,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:57:19,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:57:19,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:57:19,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 329 transitions, 4240 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) [2024-06-20 16:57:19,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:19,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:57:19,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:21,078 INFO L124 PetriNetUnfolderBase]: 2545/4242 cut-off events. [2024-06-20 16:57:21,078 INFO L125 PetriNetUnfolderBase]: For 152496/152542 co-relation queries the response was YES. [2024-06-20 16:57:21,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26836 conditions, 4242 events. 2545/4242 cut-off events. For 152496/152542 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 26348 event pairs, 563 based on Foata normal form. 37/4270 useless extension candidates. Maximal degree in co-relation 26728. Up to 3775 conditions per place. [2024-06-20 16:57:21,124 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 258 selfloop transitions, 92 changer transitions 0/355 dead transitions. [2024-06-20 16:57:21,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 355 transitions, 5312 flow [2024-06-20 16:57:21,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:57:21,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:57:21,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 16:57:21,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:57:21,126 INFO L175 Difference]: Start difference. First operand has 233 places, 329 transitions, 4240 flow. Second operand 7 states and 119 transitions. [2024-06-20 16:57:21,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 355 transitions, 5312 flow [2024-06-20 16:57:21,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 355 transitions, 5119 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-20 16:57:21,458 INFO L231 Difference]: Finished difference. Result has 237 places, 335 transitions, 4349 flow [2024-06-20 16:57:21,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4071, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4349, PETRI_PLACES=237, PETRI_TRANSITIONS=335} [2024-06-20 16:57:21,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-20 16:57:21,459 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 335 transitions, 4349 flow [2024-06-20 16:57:21,459 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) [2024-06-20 16:57:21,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:21,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:21,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 16:57:21,459 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)] === [2024-06-20 16:57:21,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:21,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1843228094, now seen corresponding path program 6 times [2024-06-20 16:57:21,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:21,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159379547] [2024-06-20 16:57:21,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:21,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:21,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:24,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:24,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159379547] [2024-06-20 16:57:24,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159379547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:24,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:24,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:57:24,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517900749] [2024-06-20 16:57:24,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:24,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:57:24,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:24,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:57:24,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:57:24,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:57:24,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 335 transitions, 4349 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) [2024-06-20 16:57:24,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:24,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:57:24,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:25,858 INFO L124 PetriNetUnfolderBase]: 2542/4232 cut-off events. [2024-06-20 16:57:25,859 INFO L125 PetriNetUnfolderBase]: For 154910/154922 co-relation queries the response was YES. [2024-06-20 16:57:25,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26828 conditions, 4232 events. 2542/4232 cut-off events. For 154910/154922 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 26167 event pairs, 548 based on Foata normal form. 13/4240 useless extension candidates. Maximal degree in co-relation 26719. Up to 3772 conditions per place. [2024-06-20 16:57:25,904 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 263 selfloop transitions, 94 changer transitions 0/362 dead transitions. [2024-06-20 16:57:25,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 362 transitions, 5347 flow [2024-06-20 16:57:25,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:57:25,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:57:25,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 16:57:25,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-20 16:57:25,912 INFO L175 Difference]: Start difference. First operand has 237 places, 335 transitions, 4349 flow. Second operand 7 states and 128 transitions. [2024-06-20 16:57:25,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 362 transitions, 5347 flow [2024-06-20 16:57:26,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 362 transitions, 5170 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-20 16:57:26,274 INFO L231 Difference]: Finished difference. Result has 241 places, 335 transitions, 4370 flow [2024-06-20 16:57:26,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4172, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4370, PETRI_PLACES=241, PETRI_TRANSITIONS=335} [2024-06-20 16:57:26,275 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-20 16:57:26,275 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 335 transitions, 4370 flow [2024-06-20 16:57:26,275 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) [2024-06-20 16:57:26,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:26,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:26,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 16:57:26,276 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)] === [2024-06-20 16:57:26,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:26,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2089502342, now seen corresponding path program 7 times [2024-06-20 16:57:26,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:26,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927898146] [2024-06-20 16:57:26,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:26,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:29,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:29,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:29,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927898146] [2024-06-20 16:57:29,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927898146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:29,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:29,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:57:29,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768878180] [2024-06-20 16:57:29,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:29,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:57:29,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:29,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:57:29,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:57:29,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:57:29,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 335 transitions, 4370 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) [2024-06-20 16:57:29,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:29,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:57:29,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:30,591 INFO L124 PetriNetUnfolderBase]: 2539/4230 cut-off events. [2024-06-20 16:57:30,591 INFO L125 PetriNetUnfolderBase]: For 158594/158609 co-relation queries the response was YES. [2024-06-20 16:57:30,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26880 conditions, 4230 events. 2539/4230 cut-off events. For 158594/158609 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 26190 event pairs, 537 based on Foata normal form. 15/4242 useless extension candidates. Maximal degree in co-relation 26770. Up to 3853 conditions per place. [2024-06-20 16:57:30,636 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 289 selfloop transitions, 62 changer transitions 0/356 dead transitions. [2024-06-20 16:57:30,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 356 transitions, 5136 flow [2024-06-20 16:57:30,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:57:30,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:57:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 16:57:30,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-20 16:57:30,637 INFO L175 Difference]: Start difference. First operand has 241 places, 335 transitions, 4370 flow. Second operand 7 states and 120 transitions. [2024-06-20 16:57:30,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 356 transitions, 5136 flow [2024-06-20 16:57:31,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 356 transitions, 4902 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 16:57:31,005 INFO L231 Difference]: Finished difference. Result has 241 places, 335 transitions, 4277 flow [2024-06-20 16:57:31,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4136, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4277, PETRI_PLACES=241, PETRI_TRANSITIONS=335} [2024-06-20 16:57:31,006 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-20 16:57:31,006 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 335 transitions, 4277 flow [2024-06-20 16:57:31,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:31,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:31,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:31,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 16:57:31,006 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)] === [2024-06-20 16:57:31,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:31,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1953619422, now seen corresponding path program 8 times [2024-06-20 16:57:31,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:31,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756481338] [2024-06-20 16:57:31,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:31,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:31,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:33,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:33,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756481338] [2024-06-20 16:57:33,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756481338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:33,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:33,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:57:33,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864410240] [2024-06-20 16:57:33,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:33,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:57:33,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:33,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:57:33,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:57:33,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:57:33,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 335 transitions, 4277 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) [2024-06-20 16:57:33,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:33,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:57:33,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:35,606 INFO L124 PetriNetUnfolderBase]: 2533/4222 cut-off events. [2024-06-20 16:57:35,607 INFO L125 PetriNetUnfolderBase]: For 156964/156979 co-relation queries the response was YES. [2024-06-20 16:57:35,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26606 conditions, 4222 events. 2533/4222 cut-off events. For 156964/156979 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 26204 event pairs, 541 based on Foata normal form. 16/4235 useless extension candidates. Maximal degree in co-relation 26496. Up to 3778 conditions per place. [2024-06-20 16:57:35,726 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 282 selfloop transitions, 83 changer transitions 0/370 dead transitions. [2024-06-20 16:57:35,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 370 transitions, 5215 flow [2024-06-20 16:57:35,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:57:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:57:35,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 16:57:35,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 16:57:35,736 INFO L175 Difference]: Start difference. First operand has 241 places, 335 transitions, 4277 flow. Second operand 8 states and 147 transitions. [2024-06-20 16:57:35,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 370 transitions, 5215 flow [2024-06-20 16:57:36,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 370 transitions, 5055 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 16:57:36,062 INFO L231 Difference]: Finished difference. Result has 243 places, 335 transitions, 4318 flow [2024-06-20 16:57:36,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4117, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4318, PETRI_PLACES=243, PETRI_TRANSITIONS=335} [2024-06-20 16:57:36,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-20 16:57:36,063 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 335 transitions, 4318 flow [2024-06-20 16:57:36,063 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) [2024-06-20 16:57:36,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:36,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:36,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 16:57:36,064 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)] === [2024-06-20 16:57:36,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:36,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1664082370, now seen corresponding path program 9 times [2024-06-20 16:57:36,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:36,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509153771] [2024-06-20 16:57:36,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:36,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:38,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:38,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509153771] [2024-06-20 16:57:38,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509153771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:38,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:38,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:57:38,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484826298] [2024-06-20 16:57:38,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:38,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:57:38,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:38,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:57:38,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:57:38,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:57:38,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 335 transitions, 4318 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) [2024-06-20 16:57:38,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:38,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:57:38,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:40,071 INFO L124 PetriNetUnfolderBase]: 2530/4222 cut-off events. [2024-06-20 16:57:40,071 INFO L125 PetriNetUnfolderBase]: For 161199/161245 co-relation queries the response was YES. [2024-06-20 16:57:40,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26722 conditions, 4222 events. 2530/4222 cut-off events. For 161199/161245 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 26247 event pairs, 563 based on Foata normal form. 37/4250 useless extension candidates. Maximal degree in co-relation 26611. Up to 3775 conditions per place. [2024-06-20 16:57:40,108 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 272 selfloop transitions, 79 changer transitions 0/356 dead transitions. [2024-06-20 16:57:40,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 356 transitions, 5086 flow [2024-06-20 16:57:40,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:57:40,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:57:40,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-20 16:57:40,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-20 16:57:40,110 INFO L175 Difference]: Start difference. First operand has 243 places, 335 transitions, 4318 flow. Second operand 6 states and 109 transitions. [2024-06-20 16:57:40,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 356 transitions, 5086 flow [2024-06-20 16:57:40,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 356 transitions, 4820 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-20 16:57:40,424 INFO L231 Difference]: Finished difference. Result has 239 places, 335 transitions, 4220 flow [2024-06-20 16:57:40,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4052, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4220, PETRI_PLACES=239, PETRI_TRANSITIONS=335} [2024-06-20 16:57:40,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-20 16:57:40,425 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 335 transitions, 4220 flow [2024-06-20 16:57:40,425 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) [2024-06-20 16:57:40,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:40,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:40,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 16:57:40,425 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)] === [2024-06-20 16:57:40,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:40,426 INFO L85 PathProgramCache]: Analyzing trace with hash 977576540, now seen corresponding path program 2 times [2024-06-20 16:57:40,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:40,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091017184] [2024-06-20 16:57:40,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:40,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:44,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:44,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091017184] [2024-06-20 16:57:44,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091017184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:44,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:44,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:57:44,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007772467] [2024-06-20 16:57:44,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:44,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:57:44,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:44,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:57:44,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:57:44,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:57:44,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 335 transitions, 4220 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:44,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:44,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:57:44,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:45,480 INFO L124 PetriNetUnfolderBase]: 2445/4100 cut-off events. [2024-06-20 16:57:45,480 INFO L125 PetriNetUnfolderBase]: For 150122/150199 co-relation queries the response was YES. [2024-06-20 16:57:45,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25707 conditions, 4100 events. 2445/4100 cut-off events. For 150122/150199 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 25632 event pairs, 514 based on Foata normal form. 66/4120 useless extension candidates. Maximal degree in co-relation 25597. Up to 3605 conditions per place. [2024-06-20 16:57:45,524 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 258 selfloop transitions, 68 changer transitions 0/354 dead transitions. [2024-06-20 16:57:45,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 354 transitions, 4962 flow [2024-06-20 16:57:45,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:57:45,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:57:45,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 16:57:45,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-20 16:57:45,526 INFO L175 Difference]: Start difference. First operand has 239 places, 335 transitions, 4220 flow. Second operand 7 states and 118 transitions. [2024-06-20 16:57:45,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 354 transitions, 4962 flow [2024-06-20 16:57:45,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 354 transitions, 4798 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 16:57:45,854 INFO L231 Difference]: Finished difference. Result has 240 places, 337 transitions, 4242 flow [2024-06-20 16:57:45,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4056, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4242, PETRI_PLACES=240, PETRI_TRANSITIONS=337} [2024-06-20 16:57:45,855 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-20 16:57:45,855 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 337 transitions, 4242 flow [2024-06-20 16:57:45,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:45,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:45,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:45,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 16:57:45,856 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)] === [2024-06-20 16:57:45,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:45,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1227168662, now seen corresponding path program 3 times [2024-06-20 16:57:45,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:45,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885285163] [2024-06-20 16:57:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:45,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:49,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:49,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885285163] [2024-06-20 16:57:49,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885285163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:49,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:49,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:57:49,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813330034] [2024-06-20 16:57:49,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:49,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:57:49,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:49,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:57:49,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:57:49,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:57:49,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 337 transitions, 4242 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:49,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:49,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:57:49,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:50,626 INFO L124 PetriNetUnfolderBase]: 2451/4112 cut-off events. [2024-06-20 16:57:50,626 INFO L125 PetriNetUnfolderBase]: For 150036/150081 co-relation queries the response was YES. [2024-06-20 16:57:50,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25944 conditions, 4112 events. 2451/4112 cut-off events. For 150036/150081 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 25724 event pairs, 510 based on Foata normal form. 41/4120 useless extension candidates. Maximal degree in co-relation 25834. Up to 3641 conditions per place. [2024-06-20 16:57:50,669 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 270 selfloop transitions, 64 changer transitions 0/362 dead transitions. [2024-06-20 16:57:50,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 362 transitions, 5022 flow [2024-06-20 16:57:50,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:57:50,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:57:50,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 16:57:50,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-20 16:57:50,670 INFO L175 Difference]: Start difference. First operand has 240 places, 337 transitions, 4242 flow. Second operand 7 states and 124 transitions. [2024-06-20 16:57:50,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 362 transitions, 5022 flow [2024-06-20 16:57:50,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 362 transitions, 4854 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 16:57:50,999 INFO L231 Difference]: Finished difference. Result has 242 places, 339 transitions, 4260 flow [2024-06-20 16:57:50,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4074, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4260, PETRI_PLACES=242, PETRI_TRANSITIONS=339} [2024-06-20 16:57:50,999 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-20 16:57:50,999 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 339 transitions, 4260 flow [2024-06-20 16:57:51,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:51,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:51,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:51,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 16:57:51,000 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)] === [2024-06-20 16:57:51,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:51,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1239204722, now seen corresponding path program 4 times [2024-06-20 16:57:51,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:51,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978517460] [2024-06-20 16:57:51,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:51,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:54,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:54,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978517460] [2024-06-20 16:57:54,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978517460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:54,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:54,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:57:54,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81483637] [2024-06-20 16:57:54,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:54,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:57:54,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:54,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:57:54,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:57:54,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:57:54,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 339 transitions, 4260 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:54,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:54,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:57:54,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:55,737 INFO L124 PetriNetUnfolderBase]: 2445/4104 cut-off events. [2024-06-20 16:57:55,737 INFO L125 PetriNetUnfolderBase]: For 151395/151472 co-relation queries the response was YES. [2024-06-20 16:57:55,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25745 conditions, 4104 events. 2445/4104 cut-off events. For 151395/151472 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 25720 event pairs, 516 based on Foata normal form. 66/4124 useless extension candidates. Maximal degree in co-relation 25634. Up to 3561 conditions per place. [2024-06-20 16:57:55,781 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 256 selfloop transitions, 74 changer transitions 0/358 dead transitions. [2024-06-20 16:57:55,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 358 transitions, 5018 flow [2024-06-20 16:57:55,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:57:55,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:57:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 16:57:55,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-20 16:57:55,782 INFO L175 Difference]: Start difference. First operand has 242 places, 339 transitions, 4260 flow. Second operand 7 states and 118 transitions. [2024-06-20 16:57:55,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 358 transitions, 5018 flow [2024-06-20 16:57:56,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 358 transitions, 4852 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 16:57:56,137 INFO L231 Difference]: Finished difference. Result has 244 places, 341 transitions, 4299 flow [2024-06-20 16:57:56,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4098, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4299, PETRI_PLACES=244, PETRI_TRANSITIONS=341} [2024-06-20 16:57:56,142 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-20 16:57:56,142 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 341 transitions, 4299 flow [2024-06-20 16:57:56,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:56,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:56,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:56,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 16:57:56,143 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)] === [2024-06-20 16:57:56,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:56,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1969103966, now seen corresponding path program 1 times [2024-06-20 16:57:56,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:56,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979031751] [2024-06-20 16:57:56,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:56,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:58,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:58,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979031751] [2024-06-20 16:57:58,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979031751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:58,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:58,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:57:58,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076743601] [2024-06-20 16:57:58,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:58,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:57:58,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:58,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:57:58,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:57:58,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:57:58,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 341 transitions, 4299 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) [2024-06-20 16:57:58,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:58,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:57:58,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:59,930 INFO L124 PetriNetUnfolderBase]: 2560/4266 cut-off events. [2024-06-20 16:57:59,930 INFO L125 PetriNetUnfolderBase]: For 147513/147518 co-relation queries the response was YES. [2024-06-20 16:57:59,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26571 conditions, 4266 events. 2560/4266 cut-off events. For 147513/147518 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 26545 event pairs, 577 based on Foata normal form. 4/4267 useless extension candidates. Maximal degree in co-relation 26459. Up to 3939 conditions per place. [2024-06-20 16:57:59,969 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 339 selfloop transitions, 24 changer transitions 0/368 dead transitions. [2024-06-20 16:57:59,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 368 transitions, 5257 flow [2024-06-20 16:57:59,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:57:59,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:57:59,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 16:57:59,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-20 16:57:59,971 INFO L175 Difference]: Start difference. First operand has 244 places, 341 transitions, 4299 flow. Second operand 7 states and 120 transitions. [2024-06-20 16:57:59,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 368 transitions, 5257 flow [2024-06-20 16:58:00,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 368 transitions, 5072 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 16:58:00,307 INFO L231 Difference]: Finished difference. Result has 246 places, 345 transitions, 4239 flow [2024-06-20 16:58:00,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4114, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4239, PETRI_PLACES=246, PETRI_TRANSITIONS=345} [2024-06-20 16:58:00,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-20 16:58:00,307 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 345 transitions, 4239 flow [2024-06-20 16:58:00,308 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) [2024-06-20 16:58:00,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:00,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:58:00,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 16:58:00,308 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)] === [2024-06-20 16:58:00,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:00,308 INFO L85 PathProgramCache]: Analyzing trace with hash 717631228, now seen corresponding path program 2 times [2024-06-20 16:58:00,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:00,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8982713] [2024-06-20 16:58:00,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:00,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:02,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:02,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8982713] [2024-06-20 16:58:02,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8982713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:02,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:02,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:58:02,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145771279] [2024-06-20 16:58:02,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:02,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:58:02,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:02,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:58:02,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:58:02,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:58:02,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 345 transitions, 4239 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) [2024-06-20 16:58:02,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:02,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:58:02,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:04,213 INFO L124 PetriNetUnfolderBase]: 2568/4278 cut-off events. [2024-06-20 16:58:04,214 INFO L125 PetriNetUnfolderBase]: For 151471/151476 co-relation queries the response was YES. [2024-06-20 16:58:04,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26558 conditions, 4278 events. 2568/4278 cut-off events. For 151471/151476 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 26651 event pairs, 615 based on Foata normal form. 4/4279 useless extension candidates. Maximal degree in co-relation 26445. Up to 3986 conditions per place. [2024-06-20 16:58:04,259 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 338 selfloop transitions, 21 changer transitions 0/364 dead transitions. [2024-06-20 16:58:04,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 364 transitions, 5041 flow [2024-06-20 16:58:04,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:58:04,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:58:04,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-20 16:58:04,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-20 16:58:04,261 INFO L175 Difference]: Start difference. First operand has 246 places, 345 transitions, 4239 flow. Second operand 7 states and 114 transitions. [2024-06-20 16:58:04,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 364 transitions, 5041 flow [2024-06-20 16:58:04,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 364 transitions, 4966 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-20 16:58:04,569 INFO L231 Difference]: Finished difference. Result has 250 places, 347 transitions, 4253 flow [2024-06-20 16:58:04,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4176, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4253, PETRI_PLACES=250, PETRI_TRANSITIONS=347} [2024-06-20 16:58:04,570 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-20 16:58:04,570 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 347 transitions, 4253 flow [2024-06-20 16:58:04,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:58:04,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:04,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:58:04,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 16:58:04,570 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)] === [2024-06-20 16:58:04,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:04,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1664091298, now seen corresponding path program 3 times [2024-06-20 16:58:04,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:04,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587258272] [2024-06-20 16:58:04,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:04,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:06,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:06,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587258272] [2024-06-20 16:58:06,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587258272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:06,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:06,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:58:06,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534732789] [2024-06-20 16:58:06,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:06,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:58:06,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:06,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:58:06,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:58:07,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:58:07,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 347 transitions, 4253 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) [2024-06-20 16:58:07,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:07,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:58:07,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:08,302 INFO L124 PetriNetUnfolderBase]: 2563/4271 cut-off events. [2024-06-20 16:58:08,302 INFO L125 PetriNetUnfolderBase]: For 153624/153629 co-relation queries the response was YES. [2024-06-20 16:58:08,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26465 conditions, 4271 events. 2563/4271 cut-off events. For 153624/153629 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 26579 event pairs, 576 based on Foata normal form. 4/4272 useless extension candidates. Maximal degree in co-relation 26350. Up to 3960 conditions per place. [2024-06-20 16:58:08,349 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 342 selfloop transitions, 20 changer transitions 0/367 dead transitions. [2024-06-20 16:58:08,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 367 transitions, 5033 flow [2024-06-20 16:58:08,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:58:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:58:08,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-20 16:58:08,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-20 16:58:08,351 INFO L175 Difference]: Start difference. First operand has 250 places, 347 transitions, 4253 flow. Second operand 6 states and 107 transitions. [2024-06-20 16:58:08,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 367 transitions, 5033 flow [2024-06-20 16:58:08,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 367 transitions, 4960 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 16:58:08,732 INFO L231 Difference]: Finished difference. Result has 251 places, 347 transitions, 4228 flow [2024-06-20 16:58:08,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4180, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4228, PETRI_PLACES=251, PETRI_TRANSITIONS=347} [2024-06-20 16:58:08,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-20 16:58:08,733 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 347 transitions, 4228 flow [2024-06-20 16:58:08,733 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) [2024-06-20 16:58:08,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:08,733 INFO 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] [2024-06-20 16:58:08,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 16:58:08,734 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)] === [2024-06-20 16:58:08,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:08,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2127236301, now seen corresponding path program 1 times [2024-06-20 16:58:08,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:08,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945461064] [2024-06-20 16:58:08,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:08,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:11,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:11,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945461064] [2024-06-20 16:58:11,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945461064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:11,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:11,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:58:11,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120626204] [2024-06-20 16:58:11,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:11,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:58:11,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:11,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:58:11,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:58:11,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:58:11,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 347 transitions, 4228 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) [2024-06-20 16:58:11,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:11,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:58:11,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:13,419 INFO L124 PetriNetUnfolderBase]: 2666/4427 cut-off events. [2024-06-20 16:58:13,424 INFO L125 PetriNetUnfolderBase]: For 180942/180952 co-relation queries the response was YES. [2024-06-20 16:58:13,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27686 conditions, 4427 events. 2666/4427 cut-off events. For 180942/180952 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 27403 event pairs, 454 based on Foata normal form. 18/4443 useless extension candidates. Maximal degree in co-relation 27570. Up to 3782 conditions per place. [2024-06-20 16:58:13,475 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 332 selfloop transitions, 68 changer transitions 0/405 dead transitions. [2024-06-20 16:58:13,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 405 transitions, 5395 flow [2024-06-20 16:58:13,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:58:13,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:58:13,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-20 16:58:13,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-20 16:58:13,477 INFO L175 Difference]: Start difference. First operand has 251 places, 347 transitions, 4228 flow. Second operand 11 states and 188 transitions. [2024-06-20 16:58:13,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 405 transitions, 5395 flow [2024-06-20 16:58:13,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 405 transitions, 5348 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 16:58:13,880 INFO L231 Difference]: Finished difference. Result has 259 places, 354 transitions, 4439 flow [2024-06-20 16:58:13,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4181, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4439, PETRI_PLACES=259, PETRI_TRANSITIONS=354} [2024-06-20 16:58:13,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-20 16:58:13,881 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 354 transitions, 4439 flow [2024-06-20 16:58:13,881 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) [2024-06-20 16:58:13,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:13,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:58:13,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 16:58:13,882 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)] === [2024-06-20 16:58:13,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:13,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1861539021, now seen corresponding path program 2 times [2024-06-20 16:58:13,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:13,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390653087] [2024-06-20 16:58:13,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:13,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:17,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:17,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390653087] [2024-06-20 16:58:17,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390653087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:17,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:17,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:58:17,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496362625] [2024-06-20 16:58:17,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:17,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:58:17,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:17,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:58:17,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:58:17,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:58:17,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 354 transitions, 4439 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) [2024-06-20 16:58:17,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:17,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:58:17,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:19,548 INFO L124 PetriNetUnfolderBase]: 2769/4584 cut-off events. [2024-06-20 16:58:19,549 INFO L125 PetriNetUnfolderBase]: For 203637/203647 co-relation queries the response was YES. [2024-06-20 16:58:19,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29482 conditions, 4584 events. 2769/4584 cut-off events. For 203637/203647 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 28542 event pairs, 567 based on Foata normal form. 18/4600 useless extension candidates. Maximal degree in co-relation 29363. Up to 4069 conditions per place. [2024-06-20 16:58:19,602 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 339 selfloop transitions, 64 changer transitions 0/408 dead transitions. [2024-06-20 16:58:19,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 408 transitions, 5601 flow [2024-06-20 16:58:19,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:58:19,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:58:19,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 196 transitions. [2024-06-20 16:58:19,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 16:58:19,604 INFO L175 Difference]: Start difference. First operand has 259 places, 354 transitions, 4439 flow. Second operand 12 states and 196 transitions. [2024-06-20 16:58:19,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 408 transitions, 5601 flow [2024-06-20 16:58:20,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 408 transitions, 5507 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 16:58:20,172 INFO L231 Difference]: Finished difference. Result has 266 places, 360 transitions, 4574 flow [2024-06-20 16:58:20,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4349, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4574, PETRI_PLACES=266, PETRI_TRANSITIONS=360} [2024-06-20 16:58:20,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-20 16:58:20,172 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 360 transitions, 4574 flow [2024-06-20 16:58:20,173 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) [2024-06-20 16:58:20,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:20,173 INFO 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] [2024-06-20 16:58:20,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 16:58:20,173 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)] === [2024-06-20 16:58:20,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:20,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1861212591, now seen corresponding path program 3 times [2024-06-20 16:58:20,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:20,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170284934] [2024-06-20 16:58:20,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:20,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:23,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:23,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170284934] [2024-06-20 16:58:23,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170284934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:23,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:23,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:58:23,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906418048] [2024-06-20 16:58:23,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:23,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:58:23,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:23,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:58:23,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:58:23,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:58:23,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 360 transitions, 4574 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:58:23,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:23,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:58:23,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:25,486 INFO L124 PetriNetUnfolderBase]: 2746/4551 cut-off events. [2024-06-20 16:58:25,487 INFO L125 PetriNetUnfolderBase]: For 197773/197783 co-relation queries the response was YES. [2024-06-20 16:58:25,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29090 conditions, 4551 events. 2746/4551 cut-off events. For 197773/197783 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 28302 event pairs, 566 based on Foata normal form. 20/4569 useless extension candidates. Maximal degree in co-relation 28968. Up to 4109 conditions per place. [2024-06-20 16:58:25,528 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 338 selfloop transitions, 59 changer transitions 0/402 dead transitions. [2024-06-20 16:58:25,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 402 transitions, 5514 flow [2024-06-20 16:58:25,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:58:25,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:58:25,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-20 16:58:25,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-20 16:58:25,529 INFO L175 Difference]: Start difference. First operand has 266 places, 360 transitions, 4574 flow. Second operand 11 states and 180 transitions. [2024-06-20 16:58:25,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 402 transitions, 5514 flow [2024-06-20 16:58:26,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 402 transitions, 5426 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 16:58:26,042 INFO L231 Difference]: Finished difference. Result has 269 places, 360 transitions, 4609 flow [2024-06-20 16:58:26,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4486, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4609, PETRI_PLACES=269, PETRI_TRANSITIONS=360} [2024-06-20 16:58:26,043 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-20 16:58:26,043 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 360 transitions, 4609 flow [2024-06-20 16:58:26,043 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) [2024-06-20 16:58:26,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:26,043 INFO 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] [2024-06-20 16:58:26,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 16:58:26,044 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)] === [2024-06-20 16:58:26,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:26,044 INFO L85 PathProgramCache]: Analyzing trace with hash -2038698441, now seen corresponding path program 1 times [2024-06-20 16:58:26,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:26,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072763606] [2024-06-20 16:58:26,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:26,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:29,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:29,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072763606] [2024-06-20 16:58:29,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072763606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:29,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:29,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:58:29,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801011507] [2024-06-20 16:58:29,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:29,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:58:29,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:29,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:58:29,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:58:29,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:58:29,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 360 transitions, 4609 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) [2024-06-20 16:58:29,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:29,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:58:29,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:31,333 INFO L124 PetriNetUnfolderBase]: 2759/4571 cut-off events. [2024-06-20 16:58:31,333 INFO L125 PetriNetUnfolderBase]: For 192332/192344 co-relation queries the response was YES. [2024-06-20 16:58:31,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29554 conditions, 4571 events. 2759/4571 cut-off events. For 192332/192344 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 28539 event pairs, 585 based on Foata normal form. 13/4579 useless extension candidates. Maximal degree in co-relation 29430. Up to 3766 conditions per place. [2024-06-20 16:58:31,386 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 251 selfloop transitions, 154 changer transitions 0/410 dead transitions. [2024-06-20 16:58:31,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 410 transitions, 5907 flow [2024-06-20 16:58:31,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:58:31,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:58:31,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 16:58:31,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 16:58:31,388 INFO L175 Difference]: Start difference. First operand has 269 places, 360 transitions, 4609 flow. Second operand 9 states and 168 transitions. [2024-06-20 16:58:31,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 410 transitions, 5907 flow [2024-06-20 16:58:31,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 410 transitions, 5790 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-20 16:58:31,885 INFO L231 Difference]: Finished difference. Result has 269 places, 369 transitions, 4950 flow [2024-06-20 16:58:31,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4492, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4950, PETRI_PLACES=269, PETRI_TRANSITIONS=369} [2024-06-20 16:58:31,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-20 16:58:31,886 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 369 transitions, 4950 flow [2024-06-20 16:58:31,886 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) [2024-06-20 16:58:31,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:31,887 INFO 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] [2024-06-20 16:58:31,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 16:58:31,887 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)] === [2024-06-20 16:58:31,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:31,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2038578285, now seen corresponding path program 1 times [2024-06-20 16:58:31,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:31,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606979248] [2024-06-20 16:58:31,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:31,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:35,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:35,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606979248] [2024-06-20 16:58:35,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606979248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:35,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:35,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:58:35,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595096963] [2024-06-20 16:58:35,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:35,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:58:35,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:35,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:58:35,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:58:35,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:58:35,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 369 transitions, 4950 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) [2024-06-20 16:58:35,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:35,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:58:35,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:37,477 INFO L124 PetriNetUnfolderBase]: 2816/4656 cut-off events. [2024-06-20 16:58:37,477 INFO L125 PetriNetUnfolderBase]: For 210543/210558 co-relation queries the response was YES. [2024-06-20 16:58:37,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31147 conditions, 4656 events. 2816/4656 cut-off events. For 210543/210558 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 29101 event pairs, 572 based on Foata normal form. 16/4669 useless extension candidates. Maximal degree in co-relation 31022. Up to 3933 conditions per place. [2024-06-20 16:58:37,524 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 268 selfloop transitions, 158 changer transitions 0/431 dead transitions. [2024-06-20 16:58:37,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 431 transitions, 6426 flow [2024-06-20 16:58:37,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:58:37,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:58:37,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 202 transitions. [2024-06-20 16:58:37,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-20 16:58:37,526 INFO L175 Difference]: Start difference. First operand has 269 places, 369 transitions, 4950 flow. Second operand 12 states and 202 transitions. [2024-06-20 16:58:37,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 431 transitions, 6426 flow [2024-06-20 16:58:37,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 431 transitions, 6234 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-20 16:58:37,930 INFO L231 Difference]: Finished difference. Result has 277 places, 387 transitions, 5356 flow [2024-06-20 16:58:37,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4767, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5356, PETRI_PLACES=277, PETRI_TRANSITIONS=387} [2024-06-20 16:58:37,931 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-20 16:58:37,931 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 387 transitions, 5356 flow [2024-06-20 16:58:37,931 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) [2024-06-20 16:58:37,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:37,931 INFO 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] [2024-06-20 16:58:37,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 16:58:37,932 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)] === [2024-06-20 16:58:37,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:37,932 INFO L85 PathProgramCache]: Analyzing trace with hash -2038578471, now seen corresponding path program 2 times [2024-06-20 16:58:37,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:37,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321002864] [2024-06-20 16:58:37,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:37,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:41,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:41,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321002864] [2024-06-20 16:58:41,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321002864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:41,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:41,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:58:41,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099432630] [2024-06-20 16:58:41,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:41,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:58:41,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:41,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:58:41,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:58:41,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:58:41,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 387 transitions, 5356 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) [2024-06-20 16:58:41,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:41,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:58:41,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:43,365 INFO L124 PetriNetUnfolderBase]: 2821/4665 cut-off events. [2024-06-20 16:58:43,365 INFO L125 PetriNetUnfolderBase]: For 218156/218171 co-relation queries the response was YES. [2024-06-20 16:58:43,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31982 conditions, 4665 events. 2821/4665 cut-off events. For 218156/218171 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 29184 event pairs, 583 based on Foata normal form. 15/4677 useless extension candidates. Maximal degree in co-relation 31855. Up to 4089 conditions per place. [2024-06-20 16:58:43,419 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 293 selfloop transitions, 127 changer transitions 0/425 dead transitions. [2024-06-20 16:58:43,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 425 transitions, 6332 flow [2024-06-20 16:58:43,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:58:43,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:58:43,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 16:58:43,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-20 16:58:43,421 INFO L175 Difference]: Start difference. First operand has 277 places, 387 transitions, 5356 flow. Second operand 9 states and 158 transitions. [2024-06-20 16:58:43,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 425 transitions, 6332 flow [2024-06-20 16:58:44,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 425 transitions, 6068 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-20 16:58:44,007 INFO L231 Difference]: Finished difference. Result has 280 places, 390 transitions, 5390 flow [2024-06-20 16:58:44,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5092, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5390, PETRI_PLACES=280, PETRI_TRANSITIONS=390} [2024-06-20 16:58:44,007 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-20 16:58:44,008 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 390 transitions, 5390 flow [2024-06-20 16:58:44,008 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) [2024-06-20 16:58:44,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:44,008 INFO 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] [2024-06-20 16:58:44,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 16:58:44,008 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)] === [2024-06-20 16:58:44,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:44,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1861209615, now seen corresponding path program 2 times [2024-06-20 16:58:44,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:44,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736443366] [2024-06-20 16:58:44,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:44,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:47,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:47,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:47,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736443366] [2024-06-20 16:58:47,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736443366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:47,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:47,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:58:47,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784558378] [2024-06-20 16:58:47,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:47,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:58:47,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:47,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:58:47,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:58:47,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:58:47,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 390 transitions, 5390 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) [2024-06-20 16:58:47,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:47,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:58:47,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:48,729 INFO L124 PetriNetUnfolderBase]: 2893/4776 cut-off events. [2024-06-20 16:58:48,730 INFO L125 PetriNetUnfolderBase]: For 233614/233629 co-relation queries the response was YES. [2024-06-20 16:58:48,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33206 conditions, 4776 events. 2893/4776 cut-off events. For 233614/233629 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 29939 event pairs, 575 based on Foata normal form. 16/4789 useless extension candidates. Maximal degree in co-relation 33077. Up to 4004 conditions per place. [2024-06-20 16:58:48,780 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 270 selfloop transitions, 180 changer transitions 0/455 dead transitions. [2024-06-20 16:58:48,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 455 transitions, 7050 flow [2024-06-20 16:58:48,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:58:48,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:58:48,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-20 16:58:48,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:58:48,782 INFO L175 Difference]: Start difference. First operand has 280 places, 390 transitions, 5390 flow. Second operand 11 states and 187 transitions. [2024-06-20 16:58:48,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 455 transitions, 7050 flow [2024-06-20 16:58:49,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 455 transitions, 6748 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 16:58:49,382 INFO L231 Difference]: Finished difference. Result has 284 places, 417 transitions, 5870 flow [2024-06-20 16:58:49,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5124, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5870, PETRI_PLACES=284, PETRI_TRANSITIONS=417} [2024-06-20 16:58:49,382 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-20 16:58:49,382 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 417 transitions, 5870 flow [2024-06-20 16:58:49,382 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) [2024-06-20 16:58:49,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:49,383 INFO 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] [2024-06-20 16:58:49,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 16:58:49,383 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)] === [2024-06-20 16:58:49,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:49,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1455929535, now seen corresponding path program 3 times [2024-06-20 16:58:49,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:49,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353483256] [2024-06-20 16:58:49,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:49,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:52,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:52,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353483256] [2024-06-20 16:58:52,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353483256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:52,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:52,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:58:52,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121165199] [2024-06-20 16:58:52,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:52,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:58:52,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:52,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:58:52,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:58:52,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:58:52,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 417 transitions, 5870 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) [2024-06-20 16:58:52,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:52,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:58:52,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:54,843 INFO L124 PetriNetUnfolderBase]: 3039/4999 cut-off events. [2024-06-20 16:58:54,843 INFO L125 PetriNetUnfolderBase]: For 245173/245191 co-relation queries the response was YES. [2024-06-20 16:58:54,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35602 conditions, 4999 events. 3039/4999 cut-off events. For 245173/245191 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 31488 event pairs, 629 based on Foata normal form. 11/5001 useless extension candidates. Maximal degree in co-relation 35472. Up to 4287 conditions per place. [2024-06-20 16:58:54,905 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 312 selfloop transitions, 195 changer transitions 0/512 dead transitions. [2024-06-20 16:58:54,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 512 transitions, 8313 flow [2024-06-20 16:58:54,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:58:54,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:58:54,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-20 16:58:54,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 16:58:54,907 INFO L175 Difference]: Start difference. First operand has 284 places, 417 transitions, 5870 flow. Second operand 11 states and 176 transitions. [2024-06-20 16:58:54,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 512 transitions, 8313 flow [2024-06-20 16:58:55,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 512 transitions, 8003 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-20 16:58:55,598 INFO L231 Difference]: Finished difference. Result has 296 places, 480 transitions, 7353 flow [2024-06-20 16:58:55,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5618, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7353, PETRI_PLACES=296, PETRI_TRANSITIONS=480} [2024-06-20 16:58:55,599 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-20 16:58:55,599 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 480 transitions, 7353 flow [2024-06-20 16:58:55,599 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) [2024-06-20 16:58:55,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:55,599 INFO 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] [2024-06-20 16:58:55,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 16:58:55,599 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)] === [2024-06-20 16:58:55,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:55,600 INFO L85 PathProgramCache]: Analyzing trace with hash -968907887, now seen corresponding path program 4 times [2024-06-20 16:58:55,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:55,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385613749] [2024-06-20 16:58:55,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:55,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:59:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:59:00,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:59:00,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385613749] [2024-06-20 16:59:00,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385613749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:59:00,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:59:00,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:59:00,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940192948] [2024-06-20 16:59:00,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:59:00,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:59:00,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:59:00,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:59:00,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:59:00,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:59:00,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 480 transitions, 7353 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:59:00,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:59:00,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:59:00,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:59:02,044 INFO L124 PetriNetUnfolderBase]: 3115/5112 cut-off events. [2024-06-20 16:59:02,044 INFO L125 PetriNetUnfolderBase]: For 271340/271348 co-relation queries the response was YES. [2024-06-20 16:59:02,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36951 conditions, 5112 events. 3115/5112 cut-off events. For 271340/271348 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 32167 event pairs, 597 based on Foata normal form. 14/5121 useless extension candidates. Maximal degree in co-relation 36814. Up to 4607 conditions per place. [2024-06-20 16:59:02,107 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 451 selfloop transitions, 71 changer transitions 0/527 dead transitions. [2024-06-20 16:59:02,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 527 transitions, 8793 flow [2024-06-20 16:59:02,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:59:02,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:59:02,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-20 16:59:02,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37662337662337664 [2024-06-20 16:59:02,108 INFO L175 Difference]: Start difference. First operand has 296 places, 480 transitions, 7353 flow. Second operand 11 states and 174 transitions. [2024-06-20 16:59:02,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 527 transitions, 8793 flow [2024-06-20 16:59:02,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 527 transitions, 8601 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-20 16:59:02,836 INFO L231 Difference]: Finished difference. Result has 308 places, 498 transitions, 7658 flow [2024-06-20 16:59:02,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7161, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7658, PETRI_PLACES=308, PETRI_TRANSITIONS=498} [2024-06-20 16:59:02,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-20 16:59:02,837 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 498 transitions, 7658 flow [2024-06-20 16:59:02,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:59:02,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:59:02,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:59:02,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 16:59:02,837 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)] === [2024-06-20 16:59:02,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:59:02,838 INFO L85 PathProgramCache]: Analyzing trace with hash -757690041, now seen corresponding path program 5 times [2024-06-20 16:59:02,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:59:02,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076214284] [2024-06-20 16:59:02,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:59:02,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:59:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:59:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:59:06,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:59:06,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076214284] [2024-06-20 16:59:06,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076214284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:59:06,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:59:06,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:59:06,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703980665] [2024-06-20 16:59:06,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:59:06,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:59:06,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:59:06,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:59:06,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:59:06,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:59:06,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 498 transitions, 7658 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) [2024-06-20 16:59:06,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:59:06,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:59:06,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:59:08,186 INFO L124 PetriNetUnfolderBase]: 3151/5168 cut-off events. [2024-06-20 16:59:08,186 INFO L125 PetriNetUnfolderBase]: For 280667/280669 co-relation queries the response was YES. [2024-06-20 16:59:08,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37347 conditions, 5168 events. 3151/5168 cut-off events. For 280667/280669 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 32519 event pairs, 597 based on Foata normal form. 10/5176 useless extension candidates. Maximal degree in co-relation 37205. Up to 4629 conditions per place. [2024-06-20 16:59:08,256 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 441 selfloop transitions, 87 changer transitions 0/533 dead transitions. [2024-06-20 16:59:08,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 533 transitions, 8847 flow [2024-06-20 16:59:08,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:59:08,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:59:08,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-20 16:59:08,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-20 16:59:08,259 INFO L175 Difference]: Start difference. First operand has 308 places, 498 transitions, 7658 flow. Second operand 12 states and 188 transitions. [2024-06-20 16:59:08,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 533 transitions, 8847 flow [2024-06-20 16:59:09,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 533 transitions, 8735 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 16:59:09,120 INFO L231 Difference]: Finished difference. Result has 315 places, 499 transitions, 7742 flow [2024-06-20 16:59:09,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7546, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7742, PETRI_PLACES=315, PETRI_TRANSITIONS=499} [2024-06-20 16:59:09,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-20 16:59:09,121 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 499 transitions, 7742 flow [2024-06-20 16:59:09,121 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) [2024-06-20 16:59:09,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:59:09,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:59:09,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 16:59:09,122 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)] === [2024-06-20 16:59:09,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:59:09,122 INFO L85 PathProgramCache]: Analyzing trace with hash -758016471, now seen corresponding path program 6 times [2024-06-20 16:59:09,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:59:09,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715450709] [2024-06-20 16:59:09,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:59:09,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:59:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:59:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:59:12,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:59:12,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715450709] [2024-06-20 16:59:12,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715450709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:59:12,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:59:12,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:59:12,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622854315] [2024-06-20 16:59:12,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:59:12,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:59:12,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:59:12,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:59:12,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:59:12,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:59:12,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 499 transitions, 7742 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) [2024-06-20 16:59:12,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:59:12,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:59:12,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:59:14,845 INFO L124 PetriNetUnfolderBase]: 3246/5313 cut-off events. [2024-06-20 16:59:14,845 INFO L125 PetriNetUnfolderBase]: For 307101/307103 co-relation queries the response was YES. [2024-06-20 16:59:14,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38910 conditions, 5313 events. 3246/5313 cut-off events. For 307101/307103 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 33470 event pairs, 606 based on Foata normal form. 8/5319 useless extension candidates. Maximal degree in co-relation 38768. Up to 4617 conditions per place. [2024-06-20 16:59:14,921 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 442 selfloop transitions, 94 changer transitions 0/541 dead transitions. [2024-06-20 16:59:14,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 541 transitions, 9144 flow [2024-06-20 16:59:14,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:59:14,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:59:14,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-20 16:59:14,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37896825396825395 [2024-06-20 16:59:14,923 INFO L175 Difference]: Start difference. First operand has 315 places, 499 transitions, 7742 flow. Second operand 12 states and 191 transitions. [2024-06-20 16:59:14,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 541 transitions, 9144 flow [2024-06-20 16:59:15,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 541 transitions, 8969 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 16:59:15,780 INFO L231 Difference]: Finished difference. Result has 318 places, 503 transitions, 7844 flow [2024-06-20 16:59:15,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7567, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7844, PETRI_PLACES=318, PETRI_TRANSITIONS=503} [2024-06-20 16:59:15,781 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-20 16:59:15,781 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 503 transitions, 7844 flow [2024-06-20 16:59:15,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:59:15,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:59:15,781 INFO 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] [2024-06-20 16:59:15,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 16:59:15,782 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)] === [2024-06-20 16:59:15,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:59:15,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1861446765, now seen corresponding path program 3 times [2024-06-20 16:59:15,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:59:15,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257225261] [2024-06-20 16:59:15,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:59:15,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:59:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:59:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:59:19,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:59:19,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257225261] [2024-06-20 16:59:19,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257225261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:59:19,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:59:19,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:59:19,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654195659] [2024-06-20 16:59:19,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:59:19,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:59:19,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:59:19,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:59:19,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:59:19,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:59:19,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 503 transitions, 7844 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) [2024-06-20 16:59:19,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:59:19,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:59:19,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:59:21,295 INFO L124 PetriNetUnfolderBase]: 3240/5316 cut-off events. [2024-06-20 16:59:21,296 INFO L125 PetriNetUnfolderBase]: For 299593/299608 co-relation queries the response was YES. [2024-06-20 16:59:21,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39044 conditions, 5316 events. 3240/5316 cut-off events. For 299593/299608 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 33596 event pairs, 625 based on Foata normal form. 16/5329 useless extension candidates. Maximal degree in co-relation 38900. Up to 4375 conditions per place. [2024-06-20 16:59:21,364 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 295 selfloop transitions, 243 changer transitions 0/543 dead transitions. [2024-06-20 16:59:21,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 543 transitions, 9291 flow [2024-06-20 16:59:21,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:59:21,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:59:21,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 212 transitions. [2024-06-20 16:59:21,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3882783882783883 [2024-06-20 16:59:21,366 INFO L175 Difference]: Start difference. First operand has 318 places, 503 transitions, 7844 flow. Second operand 13 states and 212 transitions. [2024-06-20 16:59:21,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 543 transitions, 9291 flow [2024-06-20 16:59:22,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 543 transitions, 9164 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 16:59:22,375 INFO L231 Difference]: Finished difference. Result has 324 places, 503 transitions, 8213 flow [2024-06-20 16:59:22,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7717, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8213, PETRI_PLACES=324, PETRI_TRANSITIONS=503} [2024-06-20 16:59:22,376 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-20 16:59:22,376 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 503 transitions, 8213 flow [2024-06-20 16:59:22,376 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) [2024-06-20 16:59:22,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:59:22,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:59:22,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 16:59:22,377 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)] === [2024-06-20 16:59:22,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:59:22,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1032772215, now seen corresponding path program 4 times [2024-06-20 16:59:22,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:59:22,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393195620] [2024-06-20 16:59:22,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:59:22,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:59:22,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:59:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:59:25,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:59:25,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393195620] [2024-06-20 16:59:25,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393195620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:59:25,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:59:25,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:59:25,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695001961] [2024-06-20 16:59:25,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:59:25,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:59:25,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:59:25,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:59:25,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:59:25,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:59:25,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 503 transitions, 8213 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) [2024-06-20 16:59:25,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:59:25,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:59:25,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:59:27,874 INFO L124 PetriNetUnfolderBase]: 3269/5352 cut-off events. [2024-06-20 16:59:27,875 INFO L125 PetriNetUnfolderBase]: For 314135/314145 co-relation queries the response was YES. [2024-06-20 16:59:27,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40187 conditions, 5352 events. 3269/5352 cut-off events. For 314135/314145 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 33728 event pairs, 649 based on Foata normal form. 11/5358 useless extension candidates. Maximal degree in co-relation 40041. Up to 4691 conditions per place. [2024-06-20 16:59:27,951 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 407 selfloop transitions, 151 changer transitions 0/563 dead transitions. [2024-06-20 16:59:27,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 563 transitions, 9906 flow [2024-06-20 16:59:27,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:59:27,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:59:27,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-20 16:59:27,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-20 16:59:27,953 INFO L175 Difference]: Start difference. First operand has 324 places, 503 transitions, 8213 flow. Second operand 11 states and 196 transitions. [2024-06-20 16:59:27,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 563 transitions, 9906 flow [2024-06-20 16:59:29,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 563 transitions, 9398 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-20 16:59:29,166 INFO L231 Difference]: Finished difference. Result has 326 places, 515 transitions, 8208 flow [2024-06-20 16:59:29,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7705, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8208, PETRI_PLACES=326, PETRI_TRANSITIONS=515} [2024-06-20 16:59:29,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-20 16:59:29,167 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 515 transitions, 8208 flow [2024-06-20 16:59:29,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:59:29,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:59:29,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:59:29,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 16:59:29,167 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)] === [2024-06-20 16:59:29,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:59:29,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1540988739, now seen corresponding path program 5 times [2024-06-20 16:59:29,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:59:29,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783904819] [2024-06-20 16:59:29,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:59:29,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:59:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:59:33,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:59:33,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:59:33,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783904819] [2024-06-20 16:59:33,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783904819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:59:33,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:59:33,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:59:33,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895454381] [2024-06-20 16:59:33,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:59:33,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:59:33,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:59:33,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:59:33,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:59:33,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:59:33,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 515 transitions, 8208 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) [2024-06-20 16:59:33,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:59:33,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:59:33,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:59:35,105 INFO L124 PetriNetUnfolderBase]: 3282/5378 cut-off events. [2024-06-20 16:59:35,106 INFO L125 PetriNetUnfolderBase]: For 322611/322621 co-relation queries the response was YES. [2024-06-20 16:59:35,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40267 conditions, 5378 events. 3282/5378 cut-off events. For 322611/322621 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 33974 event pairs, 651 based on Foata normal form. 11/5384 useless extension candidates. Maximal degree in co-relation 40119. Up to 4706 conditions per place. [2024-06-20 16:59:35,172 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 402 selfloop transitions, 159 changer transitions 0/566 dead transitions. [2024-06-20 16:59:35,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 566 transitions, 9840 flow [2024-06-20 16:59:35,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:59:35,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:59:35,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 203 transitions. [2024-06-20 16:59:35,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-20 16:59:35,174 INFO L175 Difference]: Start difference. First operand has 326 places, 515 transitions, 8208 flow. Second operand 12 states and 203 transitions. [2024-06-20 16:59:35,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 566 transitions, 9840 flow [2024-06-20 16:59:36,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 566 transitions, 9596 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-20 16:59:36,353 INFO L231 Difference]: Finished difference. Result has 332 places, 521 transitions, 8391 flow [2024-06-20 16:59:36,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7986, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8391, PETRI_PLACES=332, PETRI_TRANSITIONS=521} [2024-06-20 16:59:36,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-20 16:59:36,354 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 521 transitions, 8391 flow [2024-06-20 16:59:36,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:59:36,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:59:36,355 INFO 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] [2024-06-20 16:59:36,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 16:59:36,355 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)] === [2024-06-20 16:59:36,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:59:36,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1540989111, now seen corresponding path program 1 times [2024-06-20 16:59:36,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:59:36,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844280312] [2024-06-20 16:59:36,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:59:36,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:59:36,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:59:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:59:39,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:59:39,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844280312] [2024-06-20 16:59:39,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844280312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:59:39,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:59:39,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:59:39,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206076825] [2024-06-20 16:59:39,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:59:39,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:59:39,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:59:39,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:59:39,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:59:39,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:59:39,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 521 transitions, 8391 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) [2024-06-20 16:59:39,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:59:39,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:59:39,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:59:41,809 INFO L124 PetriNetUnfolderBase]: 3344/5458 cut-off events. [2024-06-20 16:59:41,809 INFO L125 PetriNetUnfolderBase]: For 343990/344000 co-relation queries the response was YES. [2024-06-20 16:59:41,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41523 conditions, 5458 events. 3344/5458 cut-off events. For 343990/344000 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 34392 event pairs, 645 based on Foata normal form. 12/5465 useless extension candidates. Maximal degree in co-relation 41373. Up to 4803 conditions per place. [2024-06-20 16:59:41,886 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 437 selfloop transitions, 134 changer transitions 0/576 dead transitions. [2024-06-20 16:59:41,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 576 transitions, 10142 flow [2024-06-20 16:59:41,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:59:41,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:59:41,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 199 transitions. [2024-06-20 16:59:41,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3948412698412698 [2024-06-20 16:59:41,888 INFO L175 Difference]: Start difference. First operand has 332 places, 521 transitions, 8391 flow. Second operand 12 states and 199 transitions. [2024-06-20 16:59:41,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 576 transitions, 10142 flow [2024-06-20 16:59:43,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 576 transitions, 9838 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 16:59:43,418 INFO L231 Difference]: Finished difference. Result has 337 places, 536 transitions, 8607 flow [2024-06-20 16:59:43,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8087, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8607, PETRI_PLACES=337, PETRI_TRANSITIONS=536} [2024-06-20 16:59:43,418 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-20 16:59:43,419 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 536 transitions, 8607 flow [2024-06-20 16:59:43,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:59:43,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:59:43,419 INFO 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] [2024-06-20 16:59:43,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 16:59:43,419 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)] === [2024-06-20 16:59:43,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:59:43,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1535327829, now seen corresponding path program 6 times [2024-06-20 16:59:43,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:59:43,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144850621] [2024-06-20 16:59:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:59:43,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:59:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:59:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:59:46,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:59:46,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144850621] [2024-06-20 16:59:46,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144850621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:59:46,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:59:46,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:59:46,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428885385] [2024-06-20 16:59:46,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:59:46,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:59:46,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:59:46,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:59:46,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:59:46,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:59:46,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 536 transitions, 8607 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) [2024-06-20 16:59:46,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:59:46,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:59:46,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:59:48,594 INFO L124 PetriNetUnfolderBase]: 3341/5460 cut-off events. [2024-06-20 16:59:48,594 INFO L125 PetriNetUnfolderBase]: For 349428/349438 co-relation queries the response was YES. [2024-06-20 16:59:48,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41881 conditions, 5460 events. 3341/5460 cut-off events. For 349428/349438 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 34466 event pairs, 654 based on Foata normal form. 11/5466 useless extension candidates. Maximal degree in co-relation 41729. Up to 4789 conditions per place. [2024-06-20 16:59:48,664 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 422 selfloop transitions, 147 changer transitions 0/574 dead transitions. [2024-06-20 16:59:48,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 574 transitions, 10142 flow [2024-06-20 16:59:48,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:59:48,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:59:48,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:59:48,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-20 16:59:48,666 INFO L175 Difference]: Start difference. First operand has 337 places, 536 transitions, 8607 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:59:48,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 574 transitions, 10142 flow [2024-06-20 16:59:49,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 574 transitions, 9891 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-20 16:59:49,990 INFO L231 Difference]: Finished difference. Result has 340 places, 536 transitions, 8656 flow [2024-06-20 16:59:49,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8356, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8656, PETRI_PLACES=340, PETRI_TRANSITIONS=536} [2024-06-20 16:59:49,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-20 16:59:49,991 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 536 transitions, 8656 flow [2024-06-20 16:59:49,991 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) [2024-06-20 16:59:49,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:59:49,991 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, 1] [2024-06-20 16:59:49,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 16:59:49,991 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)] === [2024-06-20 16:59:49,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:59:49,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1535447799, now seen corresponding path program 7 times [2024-06-20 16:59:49,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:59:49,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935218197] [2024-06-20 16:59:49,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:59:49,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:59:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:59:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:59:53,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:59:53,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935218197] [2024-06-20 16:59:53,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935218197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:59:53,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:59:53,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:59:53,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65790791] [2024-06-20 16:59:53,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:59:53,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:59:53,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:59:53,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:59:53,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:59:53,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:59:53,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 536 transitions, 8656 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) [2024-06-20 16:59:53,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:59:53,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:59:53,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:59:55,804 INFO L124 PetriNetUnfolderBase]: 3343/5471 cut-off events. [2024-06-20 16:59:55,805 INFO L125 PetriNetUnfolderBase]: For 358082/358095 co-relation queries the response was YES. [2024-06-20 16:59:55,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42083 conditions, 5471 events. 3343/5471 cut-off events. For 358082/358095 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 34599 event pairs, 646 based on Foata normal form. 14/5482 useless extension candidates. Maximal degree in co-relation 41929. Up to 4957 conditions per place. [2024-06-20 16:59:55,882 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 461 selfloop transitions, 105 changer transitions 0/571 dead transitions. [2024-06-20 16:59:55,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 571 transitions, 9947 flow [2024-06-20 16:59:55,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:59:55,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:59:55,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:59:55,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:59:55,884 INFO L175 Difference]: Start difference. First operand has 340 places, 536 transitions, 8656 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:59:55,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 571 transitions, 9947 flow [2024-06-20 16:59:57,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 571 transitions, 9641 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 16:59:57,286 INFO L231 Difference]: Finished difference. Result has 341 places, 539 transitions, 8632 flow [2024-06-20 16:59:57,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8356, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8632, PETRI_PLACES=341, PETRI_TRANSITIONS=539} [2024-06-20 16:59:57,286 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-20 16:59:57,287 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 539 transitions, 8632 flow [2024-06-20 16:59:57,287 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) [2024-06-20 16:59:57,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:59:57,287 INFO 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] [2024-06-20 16:59:57,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 16:59:57,287 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)] === [2024-06-20 16:59:57,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:59:57,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1535447985, now seen corresponding path program 4 times [2024-06-20 16:59:57,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:59:57,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981216988] [2024-06-20 16:59:57,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:59:57,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:59:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:00:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:00:01,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:00:01,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981216988] [2024-06-20 17:00:01,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981216988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:00:01,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:00:01,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:00:01,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172271399] [2024-06-20 17:00:01,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:00:01,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:00:01,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:00:01,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:00:01,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:00:01,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:00:01,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 539 transitions, 8632 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) [2024-06-20 17:00:01,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:00:01,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:00:01,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:00:03,199 INFO L124 PetriNetUnfolderBase]: 3369/5501 cut-off events. [2024-06-20 17:00:03,199 INFO L125 PetriNetUnfolderBase]: For 372525/372538 co-relation queries the response was YES. [2024-06-20 17:00:03,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42471 conditions, 5501 events. 3369/5501 cut-off events. For 372525/372538 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 34730 event pairs, 638 based on Foata normal form. 14/5512 useless extension candidates. Maximal degree in co-relation 42316. Up to 4902 conditions per place. [2024-06-20 17:00:03,288 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 456 selfloop transitions, 123 changer transitions 0/584 dead transitions. [2024-06-20 17:00:03,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 584 transitions, 10141 flow [2024-06-20 17:00:03,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:00:03,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:00:03,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-20 17:00:03,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39826839826839827 [2024-06-20 17:00:03,290 INFO L175 Difference]: Start difference. First operand has 341 places, 539 transitions, 8632 flow. Second operand 11 states and 184 transitions. [2024-06-20 17:00:03,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 584 transitions, 10141 flow [2024-06-20 17:00:04,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 584 transitions, 9858 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 17:00:04,931 INFO L231 Difference]: Finished difference. Result has 346 places, 545 transitions, 8737 flow [2024-06-20 17:00:04,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8349, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8737, PETRI_PLACES=346, PETRI_TRANSITIONS=545} [2024-06-20 17:00:04,932 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-20 17:00:04,932 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 545 transitions, 8737 flow [2024-06-20 17:00:04,932 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) [2024-06-20 17:00:04,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:00:04,932 INFO 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] [2024-06-20 17:00:04,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 17:00:04,932 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)] === [2024-06-20 17:00:04,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:00:04,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1544713761, now seen corresponding path program 2 times [2024-06-20 17:00:04,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:00:04,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461148841] [2024-06-20 17:00:04,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:00:04,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:00:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:00:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:00:08,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:00:08,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461148841] [2024-06-20 17:00:08,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461148841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:00:08,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:00:08,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:00:08,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051247519] [2024-06-20 17:00:08,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:00:08,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:00:08,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:00:08,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:00:08,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:00:08,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:00:08,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 545 transitions, 8737 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) [2024-06-20 17:00:08,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:00:08,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:00:08,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:00:10,818 INFO L124 PetriNetUnfolderBase]: 3405/5553 cut-off events. [2024-06-20 17:00:10,818 INFO L125 PetriNetUnfolderBase]: For 387714/387727 co-relation queries the response was YES. [2024-06-20 17:00:10,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43176 conditions, 5553 events. 3405/5553 cut-off events. For 387714/387727 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 35045 event pairs, 641 based on Foata normal form. 14/5564 useless extension candidates. Maximal degree in co-relation 43019. Up to 5018 conditions per place. [2024-06-20 17:00:10,902 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 484 selfloop transitions, 102 changer transitions 0/591 dead transitions. [2024-06-20 17:00:10,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 591 transitions, 10267 flow [2024-06-20 17:00:10,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:00:10,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:00:10,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 203 transitions. [2024-06-20 17:00:10,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3717948717948718 [2024-06-20 17:00:10,904 INFO L175 Difference]: Start difference. First operand has 346 places, 545 transitions, 8737 flow. Second operand 13 states and 203 transitions. [2024-06-20 17:00:10,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 591 transitions, 10267 flow [2024-06-20 17:00:12,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 591 transitions, 10019 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-20 17:00:12,621 INFO L231 Difference]: Finished difference. Result has 351 places, 554 transitions, 8812 flow [2024-06-20 17:00:12,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8497, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8812, PETRI_PLACES=351, PETRI_TRANSITIONS=554} [2024-06-20 17:00:12,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-20 17:00:12,621 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 554 transitions, 8812 flow [2024-06-20 17:00:12,622 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) [2024-06-20 17:00:12,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:00:12,622 INFO 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] [2024-06-20 17:00:12,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 17:00:12,622 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)] === [2024-06-20 17:00:12,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:00:12,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1544707809, now seen corresponding path program 8 times [2024-06-20 17:00:12,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:00:12,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140904588] [2024-06-20 17:00:12,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:00:12,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:00:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:00:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:00:16,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:00:16,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140904588] [2024-06-20 17:00:16,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140904588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:00:16,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:00:16,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:00:16,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744532730] [2024-06-20 17:00:16,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:00:16,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:00:16,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:00:16,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:00:16,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:00:16,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:00:16,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 554 transitions, 8812 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) [2024-06-20 17:00:16,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:00:16,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:00:16,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:00:18,877 INFO L124 PetriNetUnfolderBase]: 3433/5610 cut-off events. [2024-06-20 17:00:18,877 INFO L125 PetriNetUnfolderBase]: For 396807/396820 co-relation queries the response was YES. [2024-06-20 17:00:18,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43698 conditions, 5610 events. 3433/5610 cut-off events. For 396807/396820 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 35555 event pairs, 652 based on Foata normal form. 13/5620 useless extension candidates. Maximal degree in co-relation 43541. Up to 5061 conditions per place. [2024-06-20 17:00:18,948 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 475 selfloop transitions, 124 changer transitions 0/604 dead transitions. [2024-06-20 17:00:18,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 604 transitions, 10554 flow [2024-06-20 17:00:18,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:00:18,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:00:18,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-20 17:00:18,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3874458874458874 [2024-06-20 17:00:18,950 INFO L175 Difference]: Start difference. First operand has 351 places, 554 transitions, 8812 flow. Second operand 11 states and 179 transitions. [2024-06-20 17:00:18,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 604 transitions, 10554 flow [2024-06-20 17:00:20,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 604 transitions, 10404 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 17:00:20,497 INFO L231 Difference]: Finished difference. Result has 355 places, 569 transitions, 9237 flow [2024-06-20 17:00:20,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8662, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9237, PETRI_PLACES=355, PETRI_TRANSITIONS=569} [2024-06-20 17:00:20,497 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-20 17:00:20,497 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 569 transitions, 9237 flow [2024-06-20 17:00:20,498 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) [2024-06-20 17:00:20,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:00:20,498 INFO 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] [2024-06-20 17:00:20,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 17:00:20,498 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)] === [2024-06-20 17:00:20,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:00:20,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1544713575, now seen corresponding path program 5 times [2024-06-20 17:00:20,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:00:20,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571812055] [2024-06-20 17:00:20,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:00:20,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:00:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:00:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:00:24,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:00:24,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571812055] [2024-06-20 17:00:24,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571812055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:00:24,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:00:24,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:00:24,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101355031] [2024-06-20 17:00:24,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:00:24,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:00:24,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:00:24,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:00:24,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:00:24,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:00:24,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 569 transitions, 9237 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) [2024-06-20 17:00:24,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:00:24,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:00:24,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:00:26,717 INFO L124 PetriNetUnfolderBase]: 3459/5638 cut-off events. [2024-06-20 17:00:26,718 INFO L125 PetriNetUnfolderBase]: For 415995/416008 co-relation queries the response was YES. [2024-06-20 17:00:26,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44478 conditions, 5638 events. 3459/5638 cut-off events. For 415995/416008 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 35675 event pairs, 638 based on Foata normal form. 14/5649 useless extension candidates. Maximal degree in co-relation 44318. Up to 4999 conditions per place. [2024-06-20 17:00:26,816 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 473 selfloop transitions, 142 changer transitions 0/620 dead transitions. [2024-06-20 17:00:26,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 620 transitions, 10988 flow [2024-06-20 17:00:26,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 17:00:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 17:00:26,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 223 transitions. [2024-06-20 17:00:26,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3792517006802721 [2024-06-20 17:00:26,818 INFO L175 Difference]: Start difference. First operand has 355 places, 569 transitions, 9237 flow. Second operand 14 states and 223 transitions. [2024-06-20 17:00:26,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 620 transitions, 10988 flow [2024-06-20 17:00:28,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 620 transitions, 10784 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 17:00:28,287 INFO L231 Difference]: Finished difference. Result has 363 places, 575 transitions, 9417 flow [2024-06-20 17:00:28,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9033, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9417, PETRI_PLACES=363, PETRI_TRANSITIONS=575} [2024-06-20 17:00:28,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-20 17:00:28,288 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 575 transitions, 9417 flow [2024-06-20 17:00:28,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:28,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:00:28,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:00:28,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 17:00:28,288 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)] === [2024-06-20 17:00:28,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:00:28,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2122709535, now seen corresponding path program 9 times [2024-06-20 17:00:28,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:00:28,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798717580] [2024-06-20 17:00:28,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:00:28,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:00:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:00:31,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:00:31,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:00:31,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798717580] [2024-06-20 17:00:31,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798717580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:00:31,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:00:31,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:00:31,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478686285] [2024-06-20 17:00:31,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:00:31,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:00:31,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:00:31,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:00:31,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:00:31,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:00:31,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 575 transitions, 9417 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) [2024-06-20 17:00:31,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:00:31,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:00:31,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:00:34,108 INFO L124 PetriNetUnfolderBase]: 3456/5650 cut-off events. [2024-06-20 17:00:34,108 INFO L125 PetriNetUnfolderBase]: For 420371/420384 co-relation queries the response was YES. [2024-06-20 17:00:34,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44644 conditions, 5650 events. 3456/5650 cut-off events. For 420371/420384 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 35901 event pairs, 661 based on Foata normal form. 13/5660 useless extension candidates. Maximal degree in co-relation 44483. Up to 5094 conditions per place. [2024-06-20 17:00:34,193 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 482 selfloop transitions, 124 changer transitions 0/611 dead transitions. [2024-06-20 17:00:34,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 611 transitions, 10742 flow [2024-06-20 17:00:34,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:00:34,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:00:34,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 202 transitions. [2024-06-20 17:00:34,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36996336996337 [2024-06-20 17:00:34,195 INFO L175 Difference]: Start difference. First operand has 363 places, 575 transitions, 9417 flow. Second operand 13 states and 202 transitions. [2024-06-20 17:00:34,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 611 transitions, 10742 flow [2024-06-20 17:00:35,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 611 transitions, 10463 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-20 17:00:35,859 INFO L231 Difference]: Finished difference. Result has 366 places, 575 transitions, 9394 flow [2024-06-20 17:00:35,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9138, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9394, PETRI_PLACES=366, PETRI_TRANSITIONS=575} [2024-06-20 17:00:35,859 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-20 17:00:35,859 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 575 transitions, 9394 flow [2024-06-20 17:00:35,859 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) [2024-06-20 17:00:35,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:00:35,860 INFO 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] [2024-06-20 17:00:35,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 17:00:35,860 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)] === [2024-06-20 17:00:35,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:00:35,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1544702415, now seen corresponding path program 6 times [2024-06-20 17:00:35,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:00:35,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729956615] [2024-06-20 17:00:35,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:00:35,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:00:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:00:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:00:39,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:00:39,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729956615] [2024-06-20 17:00:39,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729956615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:00:39,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:00:39,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:00:39,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284969726] [2024-06-20 17:00:39,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:00:39,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:00:39,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:00:39,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:00:39,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:00:39,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:00:39,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 575 transitions, 9394 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) [2024-06-20 17:00:39,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:00:39,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:00:39,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:00:41,974 INFO L124 PetriNetUnfolderBase]: 3450/5628 cut-off events. [2024-06-20 17:00:41,975 INFO L125 PetriNetUnfolderBase]: For 427992/428005 co-relation queries the response was YES. [2024-06-20 17:00:42,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44463 conditions, 5628 events. 3450/5628 cut-off events. For 427992/428005 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 35617 event pairs, 639 based on Foata normal form. 14/5639 useless extension candidates. Maximal degree in co-relation 44301. Up to 4990 conditions per place. [2024-06-20 17:00:42,046 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 477 selfloop transitions, 138 changer transitions 0/620 dead transitions. [2024-06-20 17:00:42,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 620 transitions, 10907 flow [2024-06-20 17:00:42,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 17:00:42,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 17:00:42,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 225 transitions. [2024-06-20 17:00:42,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3826530612244898 [2024-06-20 17:00:42,048 INFO L175 Difference]: Start difference. First operand has 366 places, 575 transitions, 9394 flow. Second operand 14 states and 225 transitions. [2024-06-20 17:00:42,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 620 transitions, 10907 flow [2024-06-20 17:00:43,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 620 transitions, 10553 flow, removed 19 selfloop flow, removed 13 redundant places. [2024-06-20 17:00:43,875 INFO L231 Difference]: Finished difference. Result has 367 places, 575 transitions, 9324 flow [2024-06-20 17:00:43,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9040, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9324, PETRI_PLACES=367, PETRI_TRANSITIONS=575} [2024-06-20 17:00:43,875 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-20 17:00:43,875 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 575 transitions, 9324 flow [2024-06-20 17:00:43,876 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) [2024-06-20 17:00:43,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:00:43,876 INFO 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] [2024-06-20 17:00:43,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 17:00:43,876 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)] === [2024-06-20 17:00:43,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:00:43,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1544708181, now seen corresponding path program 3 times [2024-06-20 17:00:43,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:00:43,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567466272] [2024-06-20 17:00:43,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:00:43,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:00:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:00:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:00:47,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:00:47,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567466272] [2024-06-20 17:00:47,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567466272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:00:47,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:00:47,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:00:47,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993455855] [2024-06-20 17:00:47,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:00:47,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:00:47,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:00:47,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:00:47,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:00:47,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:00:47,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 575 transitions, 9324 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) [2024-06-20 17:00:47,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:00:47,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:00:47,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:00:49,644 INFO L124 PetriNetUnfolderBase]: 3444/5618 cut-off events. [2024-06-20 17:00:49,644 INFO L125 PetriNetUnfolderBase]: For 432054/432067 co-relation queries the response was YES. [2024-06-20 17:00:49,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44373 conditions, 5618 events. 3444/5618 cut-off events. For 432054/432067 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 35620 event pairs, 638 based on Foata normal form. 14/5629 useless extension candidates. Maximal degree in co-relation 44210. Up to 5076 conditions per place. [2024-06-20 17:00:49,712 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 503 selfloop transitions, 102 changer transitions 0/610 dead transitions. [2024-06-20 17:00:49,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 610 transitions, 10637 flow [2024-06-20 17:00:49,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:00:49,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:00:49,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-20 17:00:49,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37896825396825395 [2024-06-20 17:00:49,714 INFO L175 Difference]: Start difference. First operand has 367 places, 575 transitions, 9324 flow. Second operand 12 states and 191 transitions. [2024-06-20 17:00:49,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 610 transitions, 10637 flow [2024-06-20 17:00:51,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 610 transitions, 10288 flow, removed 11 selfloop flow, removed 14 redundant places. [2024-06-20 17:00:51,430 INFO L231 Difference]: Finished difference. Result has 365 places, 575 transitions, 9185 flow [2024-06-20 17:00:51,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8975, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9185, PETRI_PLACES=365, PETRI_TRANSITIONS=575} [2024-06-20 17:00:51,445 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-20 17:00:51,445 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 575 transitions, 9185 flow [2024-06-20 17:00:51,445 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) [2024-06-20 17:00:51,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:00:51,445 INFO 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] [2024-06-20 17:00:51,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 17:00:51,445 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)] === [2024-06-20 17:00:51,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:00:51,446 INFO L85 PathProgramCache]: Analyzing trace with hash -979867007, now seen corresponding path program 10 times [2024-06-20 17:00:51,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:00:51,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781530557] [2024-06-20 17:00:51,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:00:51,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:00:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:00:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:00:54,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:00:54,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781530557] [2024-06-20 17:00:54,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781530557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:00:54,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:00:54,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:00:54,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688366716] [2024-06-20 17:00:54,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:00:54,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:00:54,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:00:54,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:00:54,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:00:54,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:00:54,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 575 transitions, 9185 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) [2024-06-20 17:00:54,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:00:54,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:00:54,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:00:57,260 INFO L124 PetriNetUnfolderBase]: 3496/5713 cut-off events. [2024-06-20 17:00:57,261 INFO L125 PetriNetUnfolderBase]: For 450542/450547 co-relation queries the response was YES. [2024-06-20 17:00:57,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45268 conditions, 5713 events. 3496/5713 cut-off events. For 450542/450547 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 36390 event pairs, 678 based on Foata normal form. 3/5713 useless extension candidates. Maximal degree in co-relation 45104. Up to 4871 conditions per place. [2024-06-20 17:00:57,339 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 365 selfloop transitions, 253 changer transitions 0/623 dead transitions. [2024-06-20 17:00:57,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 623 transitions, 11205 flow [2024-06-20 17:00:57,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:00:57,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:00:57,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-20 17:00:57,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37662337662337664 [2024-06-20 17:00:57,341 INFO L175 Difference]: Start difference. First operand has 365 places, 575 transitions, 9185 flow. Second operand 11 states and 174 transitions. [2024-06-20 17:00:57,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 623 transitions, 11205 flow [2024-06-20 17:00:59,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 623 transitions, 11001 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-20 17:00:59,163 INFO L231 Difference]: Finished difference. Result has 366 places, 599 transitions, 9957 flow [2024-06-20 17:00:59,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8981, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9957, PETRI_PLACES=366, PETRI_TRANSITIONS=599} [2024-06-20 17:00:59,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-20 17:00:59,165 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 599 transitions, 9957 flow [2024-06-20 17:00:59,166 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) [2024-06-20 17:00:59,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:00:59,166 INFO 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] [2024-06-20 17:00:59,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 17:00:59,166 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)] === [2024-06-20 17:00:59,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:00:59,166 INFO L85 PathProgramCache]: Analyzing trace with hash -976147751, now seen corresponding path program 7 times [2024-06-20 17:00:59,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:00:59,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317973440] [2024-06-20 17:00:59,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:00:59,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:00:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:02,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:02,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317973440] [2024-06-20 17:01:02,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317973440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:02,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:02,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:01:02,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842417205] [2024-06-20 17:01:02,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:02,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:01:02,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:02,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:01:02,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:01:02,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:01:02,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 599 transitions, 9957 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) [2024-06-20 17:01:02,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:02,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:01:02,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:05,264 INFO L124 PetriNetUnfolderBase]: 3522/5744 cut-off events. [2024-06-20 17:01:05,265 INFO L125 PetriNetUnfolderBase]: For 473118/473133 co-relation queries the response was YES. [2024-06-20 17:01:05,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46225 conditions, 5744 events. 3522/5744 cut-off events. For 473118/473133 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 36527 event pairs, 647 based on Foata normal form. 16/5757 useless extension candidates. Maximal degree in co-relation 46059. Up to 5175 conditions per place. [2024-06-20 17:01:05,352 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 524 selfloop transitions, 107 changer transitions 0/636 dead transitions. [2024-06-20 17:01:05,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 636 transitions, 11558 flow [2024-06-20 17:01:05,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:01:05,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:01:05,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-20 17:01:05,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 17:01:05,353 INFO L175 Difference]: Start difference. First operand has 366 places, 599 transitions, 9957 flow. Second operand 12 states and 189 transitions. [2024-06-20 17:01:05,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 636 transitions, 11558 flow [2024-06-20 17:01:07,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 636 transitions, 11236 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-20 17:01:07,118 INFO L231 Difference]: Finished difference. Result has 374 places, 605 transitions, 9957 flow [2024-06-20 17:01:07,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9635, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9957, PETRI_PLACES=374, PETRI_TRANSITIONS=605} [2024-06-20 17:01:07,119 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-20 17:01:07,119 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 605 transitions, 9957 flow [2024-06-20 17:01:07,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:07,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:07,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:01:07,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 17:01:07,120 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)] === [2024-06-20 17:01:07,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:07,120 INFO L85 PathProgramCache]: Analyzing trace with hash -979866821, now seen corresponding path program 8 times [2024-06-20 17:01:07,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:07,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687977930] [2024-06-20 17:01:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:07,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:07,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:10,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:10,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687977930] [2024-06-20 17:01:10,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687977930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:10,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:10,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:01:10,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028523645] [2024-06-20 17:01:10,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:10,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:01:10,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:10,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:01:10,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:01:10,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:01:10,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 605 transitions, 9957 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) [2024-06-20 17:01:10,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:10,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:01:10,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:12,787 INFO L124 PetriNetUnfolderBase]: 3564/5815 cut-off events. [2024-06-20 17:01:12,787 INFO L125 PetriNetUnfolderBase]: For 494650/494655 co-relation queries the response was YES. [2024-06-20 17:01:12,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47163 conditions, 5815 events. 3564/5815 cut-off events. For 494650/494655 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 37033 event pairs, 662 based on Foata normal form. 4/5816 useless extension candidates. Maximal degree in co-relation 46995. Up to 4735 conditions per place. [2024-06-20 17:01:12,876 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 354 selfloop transitions, 288 changer transitions 0/647 dead transitions. [2024-06-20 17:01:12,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 647 transitions, 12092 flow [2024-06-20 17:01:12,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:01:12,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:01:12,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 209 transitions. [2024-06-20 17:01:12,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38278388278388276 [2024-06-20 17:01:12,878 INFO L175 Difference]: Start difference. First operand has 374 places, 605 transitions, 9957 flow. Second operand 13 states and 209 transitions. [2024-06-20 17:01:12,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 647 transitions, 12092 flow [2024-06-20 17:01:15,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 647 transitions, 11950 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 17:01:15,212 INFO L231 Difference]: Finished difference. Result has 380 places, 614 transitions, 10532 flow [2024-06-20 17:01:15,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9815, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10532, PETRI_PLACES=380, PETRI_TRANSITIONS=614} [2024-06-20 17:01:15,212 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-20 17:01:15,213 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 614 transitions, 10532 flow [2024-06-20 17:01:15,213 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) [2024-06-20 17:01:15,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:15,213 INFO 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] [2024-06-20 17:01:15,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 17:01:15,213 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)] === [2024-06-20 17:01:15,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:15,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1557636977, now seen corresponding path program 9 times [2024-06-20 17:01:15,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:15,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264897460] [2024-06-20 17:01:15,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:15,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:18,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:18,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264897460] [2024-06-20 17:01:18,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264897460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:18,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:18,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:01:18,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774384586] [2024-06-20 17:01:18,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:18,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:01:18,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:18,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:01:18,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:01:18,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:01:18,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 614 transitions, 10532 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) [2024-06-20 17:01:18,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:18,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:01:18,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:20,878 INFO L124 PetriNetUnfolderBase]: 3590/5849 cut-off events. [2024-06-20 17:01:20,878 INFO L125 PetriNetUnfolderBase]: For 515368/515373 co-relation queries the response was YES. [2024-06-20 17:01:20,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48482 conditions, 5849 events. 3590/5849 cut-off events. For 515368/515373 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 37220 event pairs, 663 based on Foata normal form. 4/5850 useless extension candidates. Maximal degree in co-relation 48312. Up to 4760 conditions per place. [2024-06-20 17:01:20,972 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 357 selfloop transitions, 290 changer transitions 0/652 dead transitions. [2024-06-20 17:01:20,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 652 transitions, 12654 flow [2024-06-20 17:01:20,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:01:20,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:01:20,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 198 transitions. [2024-06-20 17:01:20,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 17:01:20,975 INFO L175 Difference]: Start difference. First operand has 380 places, 614 transitions, 10532 flow. Second operand 12 states and 198 transitions. [2024-06-20 17:01:20,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 652 transitions, 12654 flow [2024-06-20 17:01:23,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 652 transitions, 12170 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 17:01:23,083 INFO L231 Difference]: Finished difference. Result has 385 places, 620 transitions, 10739 flow [2024-06-20 17:01:23,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10054, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10739, PETRI_PLACES=385, PETRI_TRANSITIONS=620} [2024-06-20 17:01:23,084 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-20 17:01:23,084 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 620 transitions, 10739 flow [2024-06-20 17:01:23,084 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) [2024-06-20 17:01:23,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:23,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:01:23,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 17:01:23,085 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)] === [2024-06-20 17:01:23,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:23,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1554143711, now seen corresponding path program 4 times [2024-06-20 17:01:23,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:23,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248941053] [2024-06-20 17:01:23,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:23,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:26,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:26,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248941053] [2024-06-20 17:01:26,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248941053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:26,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:26,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:01:26,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114802625] [2024-06-20 17:01:26,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:26,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:01:26,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:26,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:01:26,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:01:26,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:01:26,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 620 transitions, 10739 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) [2024-06-20 17:01:26,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:26,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:01:26,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:29,386 INFO L124 PetriNetUnfolderBase]: 3658/5948 cut-off events. [2024-06-20 17:01:29,386 INFO L125 PetriNetUnfolderBase]: For 550228/550243 co-relation queries the response was YES. [2024-06-20 17:01:29,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49762 conditions, 5948 events. 3658/5948 cut-off events. For 550228/550243 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 37889 event pairs, 658 based on Foata normal form. 16/5961 useless extension candidates. Maximal degree in co-relation 49591. Up to 5315 conditions per place. [2024-06-20 17:01:29,474 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 549 selfloop transitions, 120 changer transitions 0/674 dead transitions. [2024-06-20 17:01:29,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 674 transitions, 12878 flow [2024-06-20 17:01:29,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-20 17:01:29,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-20 17:01:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 231 transitions. [2024-06-20 17:01:29,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-20 17:01:29,476 INFO L175 Difference]: Start difference. First operand has 385 places, 620 transitions, 10739 flow. Second operand 15 states and 231 transitions. [2024-06-20 17:01:29,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 674 transitions, 12878 flow [2024-06-20 17:01:31,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 674 transitions, 12325 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 17:01:31,868 INFO L231 Difference]: Finished difference. Result has 393 places, 635 transitions, 10670 flow [2024-06-20 17:01:31,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10191, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10670, PETRI_PLACES=393, PETRI_TRANSITIONS=635} [2024-06-20 17:01:31,868 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-20 17:01:31,868 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 635 transitions, 10670 flow [2024-06-20 17:01:31,869 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) [2024-06-20 17:01:31,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:31,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:01:31,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 17:01:31,869 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:01:31,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:31,869 INFO L85 PathProgramCache]: Analyzing trace with hash -746842335, now seen corresponding path program 10 times [2024-06-20 17:01:31,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:31,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801159437] [2024-06-20 17:01:31,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:31,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:35,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:35,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801159437] [2024-06-20 17:01:35,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801159437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:35,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:35,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:01:35,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069837419] [2024-06-20 17:01:35,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:35,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:01:35,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:35,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:01:35,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:01:35,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:01:35,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 635 transitions, 10670 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) [2024-06-20 17:01:35,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:35,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:01:35,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:37,652 INFO L124 PetriNetUnfolderBase]: 3668/5956 cut-off events. [2024-06-20 17:01:37,653 INFO L125 PetriNetUnfolderBase]: For 560523/560538 co-relation queries the response was YES. [2024-06-20 17:01:37,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49597 conditions, 5956 events. 3668/5956 cut-off events. For 560523/560538 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37862 event pairs, 660 based on Foata normal form. 16/5969 useless extension candidates. Maximal degree in co-relation 49424. Up to 5395 conditions per place. [2024-06-20 17:01:37,747 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 564 selfloop transitions, 96 changer transitions 0/665 dead transitions. [2024-06-20 17:01:37,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 665 transitions, 12128 flow [2024-06-20 17:01:37,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:01:37,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:01:37,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-20 17:01:37,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-20 17:01:37,749 INFO L175 Difference]: Start difference. First operand has 393 places, 635 transitions, 10670 flow. Second operand 10 states and 162 transitions. [2024-06-20 17:01:37,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 665 transitions, 12128 flow [2024-06-20 17:01:40,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 665 transitions, 11880 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-20 17:01:40,371 INFO L231 Difference]: Finished difference. Result has 394 places, 638 transitions, 10685 flow [2024-06-20 17:01:40,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10422, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10685, PETRI_PLACES=394, PETRI_TRANSITIONS=638} [2024-06-20 17:01:40,371 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-20 17:01:40,371 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 638 transitions, 10685 flow [2024-06-20 17:01:40,371 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) [2024-06-20 17:01:40,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:40,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:01:40,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 17:01:40,372 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:01:40,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:40,372 INFO L85 PathProgramCache]: Analyzing trace with hash -976136591, now seen corresponding path program 11 times [2024-06-20 17:01:40,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:40,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532295176] [2024-06-20 17:01:40,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:40,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:43,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:43,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532295176] [2024-06-20 17:01:43,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532295176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:43,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:43,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:01:43,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210181314] [2024-06-20 17:01:43,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:43,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:01:43,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:43,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:01:43,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:01:43,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:01:43,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 638 transitions, 10685 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) [2024-06-20 17:01:43,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:43,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:01:43,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:46,381 INFO L124 PetriNetUnfolderBase]: 3662/5950 cut-off events. [2024-06-20 17:01:46,381 INFO L125 PetriNetUnfolderBase]: For 565067/565082 co-relation queries the response was YES. [2024-06-20 17:01:46,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49425 conditions, 5950 events. 3662/5950 cut-off events. For 565067/565082 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 37929 event pairs, 659 based on Foata normal form. 16/5963 useless extension candidates. Maximal degree in co-relation 49251. Up to 5360 conditions per place. [2024-06-20 17:01:46,471 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 554 selfloop transitions, 113 changer transitions 0/672 dead transitions. [2024-06-20 17:01:46,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 672 transitions, 12112 flow [2024-06-20 17:01:46,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 17:01:46,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 17:01:46,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 214 transitions. [2024-06-20 17:01:46,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-20 17:01:46,472 INFO L175 Difference]: Start difference. First operand has 394 places, 638 transitions, 10685 flow. Second operand 14 states and 214 transitions. [2024-06-20 17:01:46,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 672 transitions, 12112 flow [2024-06-20 17:01:49,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 672 transitions, 11872 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-20 17:01:49,078 INFO L231 Difference]: Finished difference. Result has 400 places, 638 transitions, 10677 flow [2024-06-20 17:01:49,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10445, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10677, PETRI_PLACES=400, PETRI_TRANSITIONS=638} [2024-06-20 17:01:49,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-20 17:01:49,079 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 638 transitions, 10677 flow [2024-06-20 17:01:49,079 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) [2024-06-20 17:01:49,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:49,080 INFO 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] [2024-06-20 17:01:49,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 17:01:49,080 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:01:49,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:49,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1554155243, now seen corresponding path program 11 times [2024-06-20 17:01:49,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:49,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946429895] [2024-06-20 17:01:49,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:49,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:52,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:52,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946429895] [2024-06-20 17:01:52,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946429895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:52,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:52,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:01:52,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178419872] [2024-06-20 17:01:52,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:52,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:01:52,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:52,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:01:52,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:01:52,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:01:52,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 638 transitions, 10677 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) [2024-06-20 17:01:52,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:52,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:01:52,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:55,002 INFO L124 PetriNetUnfolderBase]: 3659/5964 cut-off events. [2024-06-20 17:01:55,002 INFO L125 PetriNetUnfolderBase]: For 568267/568282 co-relation queries the response was YES. [2024-06-20 17:01:55,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49432 conditions, 5964 events. 3659/5964 cut-off events. For 568267/568282 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 38151 event pairs, 685 based on Foata normal form. 15/5976 useless extension candidates. Maximal degree in co-relation 49257. Up to 5428 conditions per place. [2024-06-20 17:01:55,090 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 565 selfloop transitions, 93 changer transitions 0/663 dead transitions. [2024-06-20 17:01:55,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 663 transitions, 12238 flow [2024-06-20 17:01:55,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:01:55,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:01:55,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 170 transitions. [2024-06-20 17:01:55,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36796536796536794 [2024-06-20 17:01:55,092 INFO L175 Difference]: Start difference. First operand has 400 places, 638 transitions, 10677 flow. Second operand 11 states and 170 transitions. [2024-06-20 17:01:55,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 663 transitions, 12238 flow [2024-06-20 17:01:57,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 663 transitions, 12006 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-20 17:01:57,713 INFO L231 Difference]: Finished difference. Result has 399 places, 638 transitions, 10639 flow [2024-06-20 17:01:57,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10445, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10639, PETRI_PLACES=399, PETRI_TRANSITIONS=638} [2024-06-20 17:01:57,714 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-20 17:01:57,714 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 638 transitions, 10639 flow [2024-06-20 17:01:57,714 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) [2024-06-20 17:01:57,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:57,714 INFO 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] [2024-06-20 17:01:57,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 17:01:57,714 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:01:57,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:57,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1554149663, now seen corresponding path program 12 times [2024-06-20 17:01:57,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:57,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073459822] [2024-06-20 17:01:57,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:57,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:01,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:01,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:01,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073459822] [2024-06-20 17:02:01,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073459822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:01,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:01,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:02:01,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636821661] [2024-06-20 17:02:01,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:01,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:02:01,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:01,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:02:01,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:02:01,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:02:01,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 638 transitions, 10639 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) [2024-06-20 17:02:01,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:01,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:02:01,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:03,606 INFO L124 PetriNetUnfolderBase]: 3656/5952 cut-off events. [2024-06-20 17:02:03,606 INFO L125 PetriNetUnfolderBase]: For 576751/576766 co-relation queries the response was YES. [2024-06-20 17:02:03,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49361 conditions, 5952 events. 3656/5952 cut-off events. For 576751/576766 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 38022 event pairs, 679 based on Foata normal form. 15/5964 useless extension candidates. Maximal degree in co-relation 49185. Up to 5425 conditions per place. [2024-06-20 17:02:03,688 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 565 selfloop transitions, 93 changer transitions 0/663 dead transitions. [2024-06-20 17:02:03,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 663 transitions, 12030 flow [2024-06-20 17:02:03,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:02:03,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:02:03,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 180 transitions. [2024-06-20 17:02:03,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-20 17:02:03,690 INFO L175 Difference]: Start difference. First operand has 399 places, 638 transitions, 10639 flow. Second operand 12 states and 180 transitions. [2024-06-20 17:02:03,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 663 transitions, 12030 flow [2024-06-20 17:02:06,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 663 transitions, 11820 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-20 17:02:06,327 INFO L231 Difference]: Finished difference. Result has 403 places, 638 transitions, 10621 flow [2024-06-20 17:02:06,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10429, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10621, PETRI_PLACES=403, PETRI_TRANSITIONS=638} [2024-06-20 17:02:06,327 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-20 17:02:06,327 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 638 transitions, 10621 flow [2024-06-20 17:02:06,327 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) [2024-06-20 17:02:06,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:06,328 INFO 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] [2024-06-20 17:02:06,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 17:02:06,328 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:02:06,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:06,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1554149291, now seen corresponding path program 5 times [2024-06-20 17:02:06,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:06,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134113410] [2024-06-20 17:02:06,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:06,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:09,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:09,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134113410] [2024-06-20 17:02:09,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134113410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:09,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:09,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:02:09,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938320821] [2024-06-20 17:02:09,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:09,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:02:09,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:09,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:02:09,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:02:09,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:02:09,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 638 transitions, 10621 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) [2024-06-20 17:02:09,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:09,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:02:09,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:12,367 INFO L124 PetriNetUnfolderBase]: 3650/5936 cut-off events. [2024-06-20 17:02:12,368 INFO L125 PetriNetUnfolderBase]: For 585964/585979 co-relation queries the response was YES. [2024-06-20 17:02:12,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49250 conditions, 5936 events. 3650/5936 cut-off events. For 585964/585979 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37814 event pairs, 656 based on Foata normal form. 16/5949 useless extension candidates. Maximal degree in co-relation 49073. Up to 5308 conditions per place. [2024-06-20 17:02:12,445 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 547 selfloop transitions, 120 changer transitions 0/672 dead transitions. [2024-06-20 17:02:12,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 672 transitions, 12396 flow [2024-06-20 17:02:12,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:02:12,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:02:12,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 204 transitions. [2024-06-20 17:02:12,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37362637362637363 [2024-06-20 17:02:12,447 INFO L175 Difference]: Start difference. First operand has 403 places, 638 transitions, 10621 flow. Second operand 13 states and 204 transitions. [2024-06-20 17:02:12,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 672 transitions, 12396 flow [2024-06-20 17:02:14,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 672 transitions, 12172 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-20 17:02:14,841 INFO L231 Difference]: Finished difference. Result has 405 places, 638 transitions, 10643 flow [2024-06-20 17:02:14,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10397, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10643, PETRI_PLACES=405, PETRI_TRANSITIONS=638} [2024-06-20 17:02:14,841 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-20 17:02:14,841 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 638 transitions, 10643 flow [2024-06-20 17:02:14,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:14,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:14,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:14,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 17:02:14,842 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:02:14,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:14,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1546912217, now seen corresponding path program 12 times [2024-06-20 17:02:14,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:14,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865287594] [2024-06-20 17:02:14,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:14,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:18,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:18,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865287594] [2024-06-20 17:02:18,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865287594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:18,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:18,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:02:18,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215509020] [2024-06-20 17:02:18,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:18,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:02:18,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:18,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:02:18,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:02:18,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:02:18,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 638 transitions, 10643 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) [2024-06-20 17:02:18,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:18,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:02:18,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:20,410 INFO L124 PetriNetUnfolderBase]: 3644/5937 cut-off events. [2024-06-20 17:02:20,410 INFO L125 PetriNetUnfolderBase]: For 589651/589656 co-relation queries the response was YES. [2024-06-20 17:02:20,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49263 conditions, 5937 events. 3644/5937 cut-off events. For 589651/589656 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 37943 event pairs, 669 based on Foata normal form. 4/5938 useless extension candidates. Maximal degree in co-relation 49085. Up to 4830 conditions per place. [2024-06-20 17:02:20,487 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 376 selfloop transitions, 285 changer transitions 0/666 dead transitions. [2024-06-20 17:02:20,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 666 transitions, 12561 flow [2024-06-20 17:02:20,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:02:20,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:02:20,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-20 17:02:20,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:02:20,489 INFO L175 Difference]: Start difference. First operand has 405 places, 638 transitions, 10643 flow. Second operand 10 states and 170 transitions. [2024-06-20 17:02:20,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 666 transitions, 12561 flow [2024-06-20 17:02:22,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 666 transitions, 12295 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-20 17:02:22,778 INFO L231 Difference]: Finished difference. Result has 403 places, 638 transitions, 10954 flow [2024-06-20 17:02:22,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10377, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10954, PETRI_PLACES=403, PETRI_TRANSITIONS=638} [2024-06-20 17:02:22,778 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-20 17:02:22,778 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 638 transitions, 10954 flow [2024-06-20 17:02:22,779 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) [2024-06-20 17:02:22,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:22,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:22,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 17:02:22,779 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:02:22,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:22,779 INFO L85 PathProgramCache]: Analyzing trace with hash -968784755, now seen corresponding path program 6 times [2024-06-20 17:02:22,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:22,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62265568] [2024-06-20 17:02:22,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:22,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:22,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:26,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:26,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62265568] [2024-06-20 17:02:26,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62265568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:26,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:26,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:02:26,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505753047] [2024-06-20 17:02:26,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:26,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:02:26,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:26,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:02:26,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:02:26,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:02:26,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 638 transitions, 10954 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) [2024-06-20 17:02:26,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:26,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:02:26,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:28,930 INFO L124 PetriNetUnfolderBase]: 3638/5924 cut-off events. [2024-06-20 17:02:28,931 INFO L125 PetriNetUnfolderBase]: For 598071/598086 co-relation queries the response was YES. [2024-06-20 17:02:28,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49627 conditions, 5924 events. 3638/5924 cut-off events. For 598071/598086 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37762 event pairs, 655 based on Foata normal form. 16/5937 useless extension candidates. Maximal degree in co-relation 49448. Up to 5295 conditions per place. [2024-06-20 17:02:29,009 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 544 selfloop transitions, 120 changer transitions 0/669 dead transitions. [2024-06-20 17:02:29,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 669 transitions, 12547 flow [2024-06-20 17:02:29,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:02:29,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:02:29,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-20 17:02:29,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-20 17:02:29,011 INFO L175 Difference]: Start difference. First operand has 403 places, 638 transitions, 10954 flow. Second operand 12 states and 188 transitions. [2024-06-20 17:02:29,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 669 transitions, 12547 flow [2024-06-20 17:02:31,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 669 transitions, 11974 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 17:02:31,435 INFO L231 Difference]: Finished difference. Result has 407 places, 638 transitions, 10627 flow [2024-06-20 17:02:31,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10381, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10627, PETRI_PLACES=407, PETRI_TRANSITIONS=638} [2024-06-20 17:02:31,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 364 predicate places. [2024-06-20 17:02:31,435 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 638 transitions, 10627 flow [2024-06-20 17:02:31,436 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) [2024-06-20 17:02:31,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:31,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:31,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 17:02:31,436 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:02:31,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:31,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1546515479, now seen corresponding path program 1 times [2024-06-20 17:02:31,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:31,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345168171] [2024-06-20 17:02:31,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:31,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:35,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:35,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345168171] [2024-06-20 17:02:35,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345168171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:35,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:35,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:02:35,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191180207] [2024-06-20 17:02:35,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:35,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:02:35,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:35,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:02:35,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:02:35,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:02:35,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 638 transitions, 10627 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:35,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:35,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:02:35,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:37,321 INFO L124 PetriNetUnfolderBase]: 3658/5965 cut-off events. [2024-06-20 17:02:37,321 INFO L125 PetriNetUnfolderBase]: For 621041/621043 co-relation queries the response was YES. [2024-06-20 17:02:37,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49393 conditions, 5965 events. 3658/5965 cut-off events. For 621041/621043 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 38126 event pairs, 640 based on Foata normal form. 6/5969 useless extension candidates. Maximal degree in co-relation 49213. Up to 5165 conditions per place. [2024-06-20 17:02:37,400 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 582 selfloop transitions, 88 changer transitions 0/675 dead transitions. [2024-06-20 17:02:37,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 675 transitions, 12309 flow [2024-06-20 17:02:37,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:02:37,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:02:37,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-20 17:02:37,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 17:02:37,401 INFO L175 Difference]: Start difference. First operand has 407 places, 638 transitions, 10627 flow. Second operand 10 states and 165 transitions. [2024-06-20 17:02:37,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 675 transitions, 12309 flow [2024-06-20 17:02:39,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 675 transitions, 12084 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-20 17:02:39,910 INFO L231 Difference]: Finished difference. Result has 408 places, 641 transitions, 10632 flow [2024-06-20 17:02:39,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10402, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10632, PETRI_PLACES=408, PETRI_TRANSITIONS=641} [2024-06-20 17:02:39,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-20 17:02:39,911 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 641 transitions, 10632 flow [2024-06-20 17:02:39,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:39,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:39,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:39,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 17:02:39,911 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:02:39,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:39,912 INFO L85 PathProgramCache]: Analyzing trace with hash 740188393, now seen corresponding path program 7 times [2024-06-20 17:02:39,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:39,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47111027] [2024-06-20 17:02:39,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:39,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:39,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:43,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:43,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47111027] [2024-06-20 17:02:43,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47111027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:43,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:43,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:02:43,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503567619] [2024-06-20 17:02:43,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:43,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:02:43,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:43,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:02:43,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:02:43,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:02:43,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 641 transitions, 10632 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) [2024-06-20 17:02:43,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:43,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:02:43,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:45,301 INFO L124 PetriNetUnfolderBase]: 3671/5984 cut-off events. [2024-06-20 17:02:45,301 INFO L125 PetriNetUnfolderBase]: For 652835/652837 co-relation queries the response was YES. [2024-06-20 17:02:45,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48949 conditions, 5984 events. 3671/5984 cut-off events. For 652835/652837 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 38272 event pairs, 645 based on Foata normal form. 20/6002 useless extension candidates. Maximal degree in co-relation 48767. Up to 5297 conditions per place. [2024-06-20 17:02:45,394 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 582 selfloop transitions, 83 changer transitions 0/670 dead transitions. [2024-06-20 17:02:45,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 670 transitions, 12089 flow [2024-06-20 17:02:45,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:02:45,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:02:45,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:02:45,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:02:45,395 INFO L175 Difference]: Start difference. First operand has 408 places, 641 transitions, 10632 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:02:45,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 670 transitions, 12089 flow [2024-06-20 17:02:48,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 670 transitions, 11981 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 17:02:48,166 INFO L231 Difference]: Finished difference. Result has 411 places, 642 transitions, 10720 flow [2024-06-20 17:02:48,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10524, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10720, PETRI_PLACES=411, PETRI_TRANSITIONS=642} [2024-06-20 17:02:48,166 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 368 predicate places. [2024-06-20 17:02:48,167 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 642 transitions, 10720 flow [2024-06-20 17:02:48,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:48,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:48,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:48,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 17:02:48,167 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:02:48,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:48,168 INFO L85 PathProgramCache]: Analyzing trace with hash 729463633, now seen corresponding path program 8 times [2024-06-20 17:02:48,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:48,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109101429] [2024-06-20 17:02:48,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:48,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:51,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:51,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109101429] [2024-06-20 17:02:51,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109101429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:51,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:51,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:02:51,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947777130] [2024-06-20 17:02:51,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:51,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:02:51,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:51,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:02:51,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:02:51,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:02:51,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 642 transitions, 10720 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) [2024-06-20 17:02:51,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:51,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:02:51,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:53,315 INFO L124 PetriNetUnfolderBase]: 3694/6024 cut-off events. [2024-06-20 17:02:53,315 INFO L125 PetriNetUnfolderBase]: For 616702/616712 co-relation queries the response was YES. [2024-06-20 17:02:53,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49424 conditions, 6024 events. 3694/6024 cut-off events. For 616702/616712 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 38605 event pairs, 640 based on Foata normal form. 20/6042 useless extension candidates. Maximal degree in co-relation 49239. Up to 5322 conditions per place. [2024-06-20 17:02:53,409 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 587 selfloop transitions, 91 changer transitions 0/683 dead transitions. [2024-06-20 17:02:53,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 683 transitions, 12248 flow [2024-06-20 17:02:53,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:02:53,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:02:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-20 17:02:53,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 17:02:53,411 INFO L175 Difference]: Start difference. First operand has 411 places, 642 transitions, 10720 flow. Second operand 10 states and 168 transitions. [2024-06-20 17:02:53,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 683 transitions, 12248 flow [2024-06-20 17:02:56,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 683 transitions, 12077 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 17:02:56,198 INFO L231 Difference]: Finished difference. Result has 415 places, 643 transitions, 10767 flow [2024-06-20 17:02:56,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10551, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10767, PETRI_PLACES=415, PETRI_TRANSITIONS=643} [2024-06-20 17:02:56,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-20 17:02:56,199 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 643 transitions, 10767 flow [2024-06-20 17:02:56,199 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) [2024-06-20 17:02:56,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:56,199 INFO 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] [2024-06-20 17:02:56,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 17:02:56,200 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:02:56,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:56,200 INFO L85 PathProgramCache]: Analyzing trace with hash 239703115, now seen corresponding path program 9 times [2024-06-20 17:02:56,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:56,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661452222] [2024-06-20 17:02:56,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:56,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:59,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:59,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661452222] [2024-06-20 17:02:59,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661452222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:59,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:59,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:02:59,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704167584] [2024-06-20 17:02:59,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:59,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:02:59,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:59,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:02:59,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:02:59,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:02:59,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 643 transitions, 10767 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) [2024-06-20 17:02:59,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:59,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:02:59,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:01,813 INFO L124 PetriNetUnfolderBase]: 3704/6038 cut-off events. [2024-06-20 17:03:01,813 INFO L125 PetriNetUnfolderBase]: For 600949/600968 co-relation queries the response was YES. [2024-06-20 17:03:01,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49149 conditions, 6038 events. 3704/6038 cut-off events. For 600949/600968 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 38639 event pairs, 652 based on Foata normal form. 14/6043 useless extension candidates. Maximal degree in co-relation 48963. Up to 5414 conditions per place. [2024-06-20 17:03:01,908 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 577 selfloop transitions, 84 changer transitions 0/666 dead transitions. [2024-06-20 17:03:01,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 666 transitions, 12193 flow [2024-06-20 17:03:01,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:03:01,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:03:01,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 17:03:01,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 17:03:01,910 INFO L175 Difference]: Start difference. First operand has 415 places, 643 transitions, 10767 flow. Second operand 8 states and 130 transitions. [2024-06-20 17:03:01,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 666 transitions, 12193 flow [2024-06-20 17:03:04,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 666 transitions, 12007 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-20 17:03:04,672 INFO L231 Difference]: Finished difference. Result has 414 places, 644 transitions, 10768 flow [2024-06-20 17:03:04,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10581, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10768, PETRI_PLACES=414, PETRI_TRANSITIONS=644} [2024-06-20 17:03:04,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-20 17:03:04,676 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 644 transitions, 10768 flow [2024-06-20 17:03:04,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:04,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:04,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:04,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 17:03:04,676 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:04,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:04,677 INFO L85 PathProgramCache]: Analyzing trace with hash 729137203, now seen corresponding path program 10 times [2024-06-20 17:03:04,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:04,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360489516] [2024-06-20 17:03:04,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:04,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:04,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:07,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:07,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360489516] [2024-06-20 17:03:07,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360489516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:07,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:07,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:07,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406030976] [2024-06-20 17:03:07,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:07,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:07,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:07,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:07,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:07,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:07,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 644 transitions, 10768 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) [2024-06-20 17:03:07,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:07,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:07,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:09,774 INFO L124 PetriNetUnfolderBase]: 3686/6020 cut-off events. [2024-06-20 17:03:09,774 INFO L125 PetriNetUnfolderBase]: For 546329/546339 co-relation queries the response was YES. [2024-06-20 17:03:09,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48094 conditions, 6020 events. 3686/6020 cut-off events. For 546329/546339 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 38503 event pairs, 503 based on Foata normal form. 18/6036 useless extension candidates. Maximal degree in co-relation 47908. Up to 4910 conditions per place. [2024-06-20 17:03:09,872 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 572 selfloop transitions, 114 changer transitions 0/691 dead transitions. [2024-06-20 17:03:09,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 691 transitions, 12327 flow [2024-06-20 17:03:09,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:03:09,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:03:09,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-20 17:03:09,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:03:09,874 INFO L175 Difference]: Start difference. First operand has 414 places, 644 transitions, 10768 flow. Second operand 10 states and 175 transitions. [2024-06-20 17:03:09,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 691 transitions, 12327 flow [2024-06-20 17:03:12,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 691 transitions, 12139 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 17:03:12,660 INFO L231 Difference]: Finished difference. Result has 417 places, 644 transitions, 10821 flow [2024-06-20 17:03:12,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10580, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10821, PETRI_PLACES=417, PETRI_TRANSITIONS=644} [2024-06-20 17:03:12,660 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-20 17:03:12,660 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 644 transitions, 10821 flow [2024-06-20 17:03:12,660 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) [2024-06-20 17:03:12,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:12,661 INFO 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] [2024-06-20 17:03:12,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 17:03:12,661 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:12,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:12,661 INFO L85 PathProgramCache]: Analyzing trace with hash -292457711, now seen corresponding path program 13 times [2024-06-20 17:03:12,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:12,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339793731] [2024-06-20 17:03:12,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:12,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:16,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:16,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:16,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339793731] [2024-06-20 17:03:16,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339793731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:16,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:16,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:16,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843069646] [2024-06-20 17:03:16,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:16,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:16,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:16,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:16,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:16,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:16,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 644 transitions, 10821 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) [2024-06-20 17:03:16,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:16,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:16,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:18,506 INFO L124 PetriNetUnfolderBase]: 3699/6046 cut-off events. [2024-06-20 17:03:18,507 INFO L125 PetriNetUnfolderBase]: For 535205/535260 co-relation queries the response was YES. [2024-06-20 17:03:18,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48652 conditions, 6046 events. 3699/6046 cut-off events. For 535205/535260 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 38916 event pairs, 692 based on Foata normal form. 42/6077 useless extension candidates. Maximal degree in co-relation 48466. Up to 5092 conditions per place. [2024-06-20 17:03:18,605 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 430 selfloop transitions, 257 changer transitions 0/692 dead transitions. [2024-06-20 17:03:18,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 692 transitions, 12804 flow [2024-06-20 17:03:18,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:03:18,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:03:18,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-20 17:03:18,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-20 17:03:18,607 INFO L175 Difference]: Start difference. First operand has 417 places, 644 transitions, 10821 flow. Second operand 10 states and 179 transitions. [2024-06-20 17:03:18,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 692 transitions, 12804 flow [2024-06-20 17:03:21,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 692 transitions, 12554 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-20 17:03:21,222 INFO L231 Difference]: Finished difference. Result has 416 places, 650 transitions, 11215 flow [2024-06-20 17:03:21,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10583, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11215, PETRI_PLACES=416, PETRI_TRANSITIONS=650} [2024-06-20 17:03:21,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-20 17:03:21,223 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 650 transitions, 11215 flow [2024-06-20 17:03:21,223 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) [2024-06-20 17:03:21,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:21,224 INFO 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] [2024-06-20 17:03:21,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 17:03:21,224 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:21,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:21,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1178653317, now seen corresponding path program 7 times [2024-06-20 17:03:21,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:21,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17001933] [2024-06-20 17:03:21,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:21,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:24,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:24,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17001933] [2024-06-20 17:03:24,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17001933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:24,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:24,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:24,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056934500] [2024-06-20 17:03:24,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:24,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:24,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:24,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:24,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:24,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:24,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 650 transitions, 11215 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) [2024-06-20 17:03:24,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:24,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:24,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:26,395 INFO L124 PetriNetUnfolderBase]: 3725/6084 cut-off events. [2024-06-20 17:03:26,396 INFO L125 PetriNetUnfolderBase]: For 528544/528599 co-relation queries the response was YES. [2024-06-20 17:03:26,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48958 conditions, 6084 events. 3725/6084 cut-off events. For 528544/528599 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 39189 event pairs, 708 based on Foata normal form. 43/6116 useless extension candidates. Maximal degree in co-relation 48774. Up to 5456 conditions per place. [2024-06-20 17:03:26,494 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 568 selfloop transitions, 109 changer transitions 0/682 dead transitions. [2024-06-20 17:03:26,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 682 transitions, 12924 flow [2024-06-20 17:03:26,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:03:26,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:03:26,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 17:03:26,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-20 17:03:26,496 INFO L175 Difference]: Start difference. First operand has 416 places, 650 transitions, 11215 flow. Second operand 9 states and 148 transitions. [2024-06-20 17:03:26,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 682 transitions, 12924 flow [2024-06-20 17:03:29,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 682 transitions, 12263 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-20 17:03:29,338 INFO L231 Difference]: Finished difference. Result has 418 places, 656 transitions, 10880 flow [2024-06-20 17:03:29,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10554, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10880, PETRI_PLACES=418, PETRI_TRANSITIONS=656} [2024-06-20 17:03:29,339 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-20 17:03:29,339 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 656 transitions, 10880 flow [2024-06-20 17:03:29,339 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) [2024-06-20 17:03:29,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:29,339 INFO 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] [2024-06-20 17:03:29,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 17:03:29,339 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:29,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:29,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1178653689, now seen corresponding path program 14 times [2024-06-20 17:03:29,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:29,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964168313] [2024-06-20 17:03:29,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:29,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:32,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:32,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964168313] [2024-06-20 17:03:32,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964168313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:32,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:32,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:32,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439602224] [2024-06-20 17:03:32,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:32,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:32,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:32,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:32,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:32,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:32,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 656 transitions, 10880 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) [2024-06-20 17:03:32,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:32,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:32,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:35,527 INFO L124 PetriNetUnfolderBase]: 3730/6095 cut-off events. [2024-06-20 17:03:35,528 INFO L125 PetriNetUnfolderBase]: For 529658/529713 co-relation queries the response was YES. [2024-06-20 17:03:35,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48606 conditions, 6095 events. 3730/6095 cut-off events. For 529658/529713 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 39220 event pairs, 697 based on Foata normal form. 42/6126 useless extension candidates. Maximal degree in co-relation 48421. Up to 5134 conditions per place. [2024-06-20 17:03:35,624 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 437 selfloop transitions, 261 changer transitions 0/703 dead transitions. [2024-06-20 17:03:35,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 703 transitions, 12803 flow [2024-06-20 17:03:35,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:03:35,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:03:35,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 203 transitions. [2024-06-20 17:03:35,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-20 17:03:35,626 INFO L175 Difference]: Start difference. First operand has 418 places, 656 transitions, 10880 flow. Second operand 12 states and 203 transitions. [2024-06-20 17:03:35,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 703 transitions, 12803 flow [2024-06-20 17:03:38,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 703 transitions, 12628 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 17:03:38,374 INFO L231 Difference]: Finished difference. Result has 425 places, 659 transitions, 11263 flow [2024-06-20 17:03:38,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10705, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11263, PETRI_PLACES=425, PETRI_TRANSITIONS=659} [2024-06-20 17:03:38,374 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-20 17:03:38,374 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 659 transitions, 11263 flow [2024-06-20 17:03:38,374 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) [2024-06-20 17:03:38,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:38,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:38,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 17:03:38,375 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:38,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:38,375 INFO L85 PathProgramCache]: Analyzing trace with hash -469621989, now seen corresponding path program 15 times [2024-06-20 17:03:38,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:38,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699068161] [2024-06-20 17:03:38,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:38,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:42,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:42,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699068161] [2024-06-20 17:03:42,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699068161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:42,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:42,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:42,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589550626] [2024-06-20 17:03:42,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:42,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:42,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:42,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:42,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:42,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:42,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 659 transitions, 11263 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) [2024-06-20 17:03:42,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:42,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:42,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:44,833 INFO L124 PetriNetUnfolderBase]: 3751/6122 cut-off events. [2024-06-20 17:03:44,833 INFO L125 PetriNetUnfolderBase]: For 549127/549139 co-relation queries the response was YES. [2024-06-20 17:03:44,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49750 conditions, 6122 events. 3751/6122 cut-off events. For 549127/549139 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 39408 event pairs, 682 based on Foata normal form. 13/6130 useless extension candidates. Maximal degree in co-relation 49563. Up to 5158 conditions per place. [2024-06-20 17:03:44,931 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 440 selfloop transitions, 258 changer transitions 0/703 dead transitions. [2024-06-20 17:03:44,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 703 transitions, 13291 flow [2024-06-20 17:03:44,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:03:44,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:03:44,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 17:03:44,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-20 17:03:44,933 INFO L175 Difference]: Start difference. First operand has 425 places, 659 transitions, 11263 flow. Second operand 8 states and 151 transitions. [2024-06-20 17:03:44,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 703 transitions, 13291 flow [2024-06-20 17:03:47,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 703 transitions, 12733 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-20 17:03:47,312 INFO L231 Difference]: Finished difference. Result has 423 places, 668 transitions, 11386 flow [2024-06-20 17:03:47,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10723, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11386, PETRI_PLACES=423, PETRI_TRANSITIONS=668} [2024-06-20 17:03:47,313 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-20 17:03:47,313 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 668 transitions, 11386 flow [2024-06-20 17:03:47,313 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) [2024-06-20 17:03:47,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:47,313 INFO 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] [2024-06-20 17:03:47,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 17:03:47,314 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:47,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:47,314 INFO L85 PathProgramCache]: Analyzing trace with hash 346046723, now seen corresponding path program 16 times [2024-06-20 17:03:47,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:47,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729444489] [2024-06-20 17:03:47,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:47,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:50,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:50,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729444489] [2024-06-20 17:03:50,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729444489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:50,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:50,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:50,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002199627] [2024-06-20 17:03:50,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:50,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:50,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:50,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:50,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:50,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:50,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 668 transitions, 11386 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) [2024-06-20 17:03:50,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:50,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:50,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:54,038 INFO L124 PetriNetUnfolderBase]: 3756/6127 cut-off events. [2024-06-20 17:03:54,039 INFO L125 PetriNetUnfolderBase]: For 559903/559915 co-relation queries the response was YES. [2024-06-20 17:03:54,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49887 conditions, 6127 events. 3756/6127 cut-off events. For 559903/559915 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 39463 event pairs, 680 based on Foata normal form. 13/6135 useless extension candidates. Maximal degree in co-relation 49699. Up to 5164 conditions per place. [2024-06-20 17:03:54,123 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 436 selfloop transitions, 276 changer transitions 0/717 dead transitions. [2024-06-20 17:03:54,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 717 transitions, 13561 flow [2024-06-20 17:03:54,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:03:54,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:03:54,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-20 17:03:54,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-20 17:03:54,125 INFO L175 Difference]: Start difference. First operand has 423 places, 668 transitions, 11386 flow. Second operand 10 states and 186 transitions. [2024-06-20 17:03:54,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 717 transitions, 13561 flow [2024-06-20 17:03:56,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 717 transitions, 13218 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 17:03:56,792 INFO L231 Difference]: Finished difference. Result has 428 places, 671 transitions, 11665 flow [2024-06-20 17:03:56,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11058, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11665, PETRI_PLACES=428, PETRI_TRANSITIONS=671} [2024-06-20 17:03:56,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-20 17:03:56,793 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 671 transitions, 11665 flow [2024-06-20 17:03:56,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:56,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:56,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:56,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 17:03:56,793 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:56,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:56,794 INFO L85 PathProgramCache]: Analyzing trace with hash 346345253, now seen corresponding path program 17 times [2024-06-20 17:03:56,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:56,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000097561] [2024-06-20 17:03:56,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:56,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:00,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:00,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000097561] [2024-06-20 17:04:00,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000097561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:00,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:00,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:04:00,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912011866] [2024-06-20 17:04:00,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:00,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:04:00,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:00,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:04:00,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:04:00,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:00,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 671 transitions, 11665 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) [2024-06-20 17:04:00,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:00,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:00,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:03,142 INFO L124 PetriNetUnfolderBase]: 3761/6140 cut-off events. [2024-06-20 17:04:03,142 INFO L125 PetriNetUnfolderBase]: For 562561/562573 co-relation queries the response was YES. [2024-06-20 17:04:03,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50142 conditions, 6140 events. 3761/6140 cut-off events. For 562561/562573 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 39572 event pairs, 682 based on Foata normal form. 13/6148 useless extension candidates. Maximal degree in co-relation 49954. Up to 5170 conditions per place. [2024-06-20 17:04:03,242 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 428 selfloop transitions, 283 changer transitions 0/716 dead transitions. [2024-06-20 17:04:03,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 716 transitions, 13637 flow [2024-06-20 17:04:03,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:04:03,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:04:03,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-20 17:04:03,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-20 17:04:03,244 INFO L175 Difference]: Start difference. First operand has 428 places, 671 transitions, 11665 flow. Second operand 11 states and 192 transitions. [2024-06-20 17:04:03,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 716 transitions, 13637 flow [2024-06-20 17:04:06,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 716 transitions, 12817 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-20 17:04:06,230 INFO L231 Difference]: Finished difference. Result has 429 places, 674 transitions, 11476 flow [2024-06-20 17:04:06,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10858, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11476, PETRI_PLACES=429, PETRI_TRANSITIONS=674} [2024-06-20 17:04:06,231 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-20 17:04:06,231 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 674 transitions, 11476 flow [2024-06-20 17:04:06,231 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) [2024-06-20 17:04:06,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:06,232 INFO 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] [2024-06-20 17:04:06,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 17:04:06,232 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:04:06,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:06,232 INFO L85 PathProgramCache]: Analyzing trace with hash -434285663, now seen corresponding path program 8 times [2024-06-20 17:04:06,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:06,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625880843] [2024-06-20 17:04:06,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:06,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:06,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:09,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:09,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:09,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625880843] [2024-06-20 17:04:09,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625880843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:09,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:09,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:04:09,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914477453] [2024-06-20 17:04:09,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:09,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:04:09,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:09,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:04:09,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:04:09,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:09,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 674 transitions, 11476 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) [2024-06-20 17:04:09,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:09,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:09,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:11,344 INFO L124 PetriNetUnfolderBase]: 3771/6162 cut-off events. [2024-06-20 17:04:11,344 INFO L125 PetriNetUnfolderBase]: For 566401/566456 co-relation queries the response was YES. [2024-06-20 17:04:11,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50048 conditions, 6162 events. 3771/6162 cut-off events. For 566401/566456 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 39798 event pairs, 710 based on Foata normal form. 43/6194 useless extension candidates. Maximal degree in co-relation 49860. Up to 5531 conditions per place. [2024-06-20 17:04:11,438 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 584 selfloop transitions, 107 changer transitions 0/696 dead transitions. [2024-06-20 17:04:11,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 696 transitions, 12959 flow [2024-06-20 17:04:11,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:04:11,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:04:11,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 17:04:11,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 17:04:11,439 INFO L175 Difference]: Start difference. First operand has 429 places, 674 transitions, 11476 flow. Second operand 8 states and 130 transitions. [2024-06-20 17:04:11,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 696 transitions, 12959 flow [2024-06-20 17:04:14,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 696 transitions, 12453 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-20 17:04:14,397 INFO L231 Difference]: Finished difference. Result has 428 places, 677 transitions, 11236 flow [2024-06-20 17:04:14,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10970, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11236, PETRI_PLACES=428, PETRI_TRANSITIONS=677} [2024-06-20 17:04:14,398 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-20 17:04:14,398 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 677 transitions, 11236 flow [2024-06-20 17:04:14,398 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) [2024-06-20 17:04:14,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:14,398 INFO 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] [2024-06-20 17:04:14,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 17:04:14,398 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:04:14,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:14,399 INFO L85 PathProgramCache]: Analyzing trace with hash 771455981, now seen corresponding path program 18 times [2024-06-20 17:04:14,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:14,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449960842] [2024-06-20 17:04:14,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:14,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:14,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:17,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:17,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449960842] [2024-06-20 17:04:17,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449960842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:17,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:17,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:04:17,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936671244] [2024-06-20 17:04:17,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:17,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:04:17,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:17,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:04:17,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:04:17,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:17,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 677 transitions, 11236 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) [2024-06-20 17:04:17,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:17,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:17,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:19,976 INFO L124 PetriNetUnfolderBase]: 3776/6173 cut-off events. [2024-06-20 17:04:19,976 INFO L125 PetriNetUnfolderBase]: For 559807/559862 co-relation queries the response was YES. [2024-06-20 17:04:20,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49665 conditions, 6173 events. 3776/6173 cut-off events. For 559807/559862 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 39876 event pairs, 699 based on Foata normal form. 42/6204 useless extension candidates. Maximal degree in co-relation 49477. Up to 5190 conditions per place. [2024-06-20 17:04:20,074 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 425 selfloop transitions, 284 changer transitions 0/714 dead transitions. [2024-06-20 17:04:20,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 714 transitions, 12975 flow [2024-06-20 17:04:20,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:04:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:04:20,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-20 17:04:20,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917748917748918 [2024-06-20 17:04:20,076 INFO L175 Difference]: Start difference. First operand has 428 places, 677 transitions, 11236 flow. Second operand 11 states and 181 transitions. [2024-06-20 17:04:20,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 714 transitions, 12975 flow [2024-06-20 17:04:23,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 714 transitions, 12743 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 17:04:23,117 INFO L231 Difference]: Finished difference. Result has 433 places, 680 transitions, 11608 flow [2024-06-20 17:04:23,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11004, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11608, PETRI_PLACES=433, PETRI_TRANSITIONS=680} [2024-06-20 17:04:23,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-20 17:04:23,118 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 680 transitions, 11608 flow [2024-06-20 17:04:23,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:23,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:23,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:23,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 17:04:23,118 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:04:23,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:23,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1305494533, now seen corresponding path program 9 times [2024-06-20 17:04:23,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:23,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954850920] [2024-06-20 17:04:23,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:23,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:26,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:26,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954850920] [2024-06-20 17:04:26,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954850920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:26,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:26,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:04:26,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922621728] [2024-06-20 17:04:26,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:26,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:04:26,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:26,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:04:26,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:04:26,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:26,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 680 transitions, 11608 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) [2024-06-20 17:04:26,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:26,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:26,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:28,633 INFO L124 PetriNetUnfolderBase]: 3786/6165 cut-off events. [2024-06-20 17:04:28,633 INFO L125 PetriNetUnfolderBase]: For 577399/577411 co-relation queries the response was YES. [2024-06-20 17:04:28,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50342 conditions, 6165 events. 3786/6165 cut-off events. For 577399/577411 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 39694 event pairs, 670 based on Foata normal form. 14/6174 useless extension candidates. Maximal degree in co-relation 50153. Up to 5374 conditions per place. [2024-06-20 17:04:28,728 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 540 selfloop transitions, 170 changer transitions 0/715 dead transitions. [2024-06-20 17:04:28,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 715 transitions, 13551 flow [2024-06-20 17:04:28,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:04:28,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:04:28,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-20 17:04:28,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-20 17:04:28,730 INFO L175 Difference]: Start difference. First operand has 433 places, 680 transitions, 11608 flow. Second operand 10 states and 169 transitions. [2024-06-20 17:04:28,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 715 transitions, 13551 flow [2024-06-20 17:04:32,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 715 transitions, 13059 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 17:04:32,032 INFO L231 Difference]: Finished difference. Result has 435 places, 683 transitions, 11520 flow [2024-06-20 17:04:32,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11116, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11520, PETRI_PLACES=435, PETRI_TRANSITIONS=683} [2024-06-20 17:04:32,032 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-20 17:04:32,032 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 683 transitions, 11520 flow [2024-06-20 17:04:32,033 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) [2024-06-20 17:04:32,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:32,033 INFO 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] [2024-06-20 17:04:32,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 17:04:32,033 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:04:32,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:32,033 INFO L85 PathProgramCache]: Analyzing trace with hash -433869953, now seen corresponding path program 10 times [2024-06-20 17:04:32,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:32,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725309386] [2024-06-20 17:04:32,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:32,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:34,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:34,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:34,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725309386] [2024-06-20 17:04:34,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725309386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:34,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:34,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:04:34,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737342614] [2024-06-20 17:04:34,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:34,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:04:34,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:34,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:04:34,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:04:34,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:34,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 683 transitions, 11520 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) [2024-06-20 17:04:34,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:34,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:34,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:37,137 INFO L124 PetriNetUnfolderBase]: 3796/6207 cut-off events. [2024-06-20 17:04:37,137 INFO L125 PetriNetUnfolderBase]: For 587999/588054 co-relation queries the response was YES. [2024-06-20 17:04:37,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50441 conditions, 6207 events. 3796/6207 cut-off events. For 587999/588054 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 40167 event pairs, 673 based on Foata normal form. 43/6239 useless extension candidates. Maximal degree in co-relation 50251. Up to 5305 conditions per place. [2024-06-20 17:04:37,240 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 543 selfloop transitions, 164 changer transitions 0/712 dead transitions. [2024-06-20 17:04:37,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 712 transitions, 13317 flow [2024-06-20 17:04:37,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:04:37,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:04:37,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 17:04:37,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-20 17:04:37,242 INFO L175 Difference]: Start difference. First operand has 435 places, 683 transitions, 11520 flow. Second operand 8 states and 137 transitions. [2024-06-20 17:04:37,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 712 transitions, 13317 flow [2024-06-20 17:04:40,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 712 transitions, 12869 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-20 17:04:40,337 INFO L231 Difference]: Finished difference. Result has 434 places, 689 transitions, 11538 flow [2024-06-20 17:04:40,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11074, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11538, PETRI_PLACES=434, PETRI_TRANSITIONS=689} [2024-06-20 17:04:40,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-20 17:04:40,338 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 689 transitions, 11538 flow [2024-06-20 17:04:40,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:40,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:40,339 INFO 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] [2024-06-20 17:04:40,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 17:04:40,339 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:04:40,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:40,339 INFO L85 PathProgramCache]: Analyzing trace with hash -2016233083, now seen corresponding path program 13 times [2024-06-20 17:04:40,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:40,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417375539] [2024-06-20 17:04:40,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:40,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:40,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:43,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:43,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417375539] [2024-06-20 17:04:43,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417375539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:43,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:43,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:04:43,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429377605] [2024-06-20 17:04:43,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:43,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:04:43,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:43,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:04:43,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:04:43,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:43,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 689 transitions, 11538 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) [2024-06-20 17:04:43,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:43,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:43,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:45,938 INFO L124 PetriNetUnfolderBase]: 3816/6219 cut-off events. [2024-06-20 17:04:45,938 INFO L125 PetriNetUnfolderBase]: For 589289/589304 co-relation queries the response was YES. [2024-06-20 17:04:46,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50644 conditions, 6219 events. 3816/6219 cut-off events. For 589289/589304 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 40056 event pairs, 628 based on Foata normal form. 16/6232 useless extension candidates. Maximal degree in co-relation 50455. Up to 5294 conditions per place. [2024-06-20 17:04:46,037 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 483 selfloop transitions, 242 changer transitions 0/730 dead transitions. [2024-06-20 17:04:46,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 730 transitions, 13388 flow [2024-06-20 17:04:46,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:04:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:04:46,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-20 17:04:46,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-20 17:04:46,039 INFO L175 Difference]: Start difference. First operand has 434 places, 689 transitions, 11538 flow. Second operand 10 states and 173 transitions. [2024-06-20 17:04:46,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 730 transitions, 13388 flow [2024-06-20 17:04:49,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 730 transitions, 13176 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-20 17:04:49,246 INFO L231 Difference]: Finished difference. Result has 442 places, 695 transitions, 12055 flow [2024-06-20 17:04:49,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11329, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12055, PETRI_PLACES=442, PETRI_TRANSITIONS=695} [2024-06-20 17:04:49,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-20 17:04:49,247 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 695 transitions, 12055 flow [2024-06-20 17:04:49,247 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) [2024-06-20 17:04:49,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:49,247 INFO 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] [2024-06-20 17:04:49,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 17:04:49,247 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:04:49,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:49,248 INFO L85 PathProgramCache]: Analyzing trace with hash 340804313, now seen corresponding path program 19 times [2024-06-20 17:04:49,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:49,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264571415] [2024-06-20 17:04:49,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:49,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:49,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:52,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:52,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:52,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264571415] [2024-06-20 17:04:52,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264571415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:52,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:52,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:04:52,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946831216] [2024-06-20 17:04:52,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:52,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:04:52,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:52,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:04:52,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:04:52,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:52,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 695 transitions, 12055 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) [2024-06-20 17:04:52,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:52,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:52,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:55,006 INFO L124 PetriNetUnfolderBase]: 3813/6221 cut-off events. [2024-06-20 17:04:55,006 INFO L125 PetriNetUnfolderBase]: For 590914/590929 co-relation queries the response was YES. [2024-06-20 17:04:55,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51245 conditions, 6221 events. 3813/6221 cut-off events. For 590914/590929 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 40156 event pairs, 673 based on Foata normal form. 15/6233 useless extension candidates. Maximal degree in co-relation 51052. Up to 5501 conditions per place. [2024-06-20 17:04:55,111 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 546 selfloop transitions, 173 changer transitions 0/724 dead transitions. [2024-06-20 17:04:55,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 724 transitions, 13586 flow [2024-06-20 17:04:55,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:04:55,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:04:55,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 17:04:55,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-20 17:04:55,113 INFO L175 Difference]: Start difference. First operand has 442 places, 695 transitions, 12055 flow. Second operand 8 states and 142 transitions. [2024-06-20 17:04:55,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 724 transitions, 13586 flow [2024-06-20 17:04:58,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 724 transitions, 13190 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 17:04:58,299 INFO L231 Difference]: Finished difference. Result has 444 places, 695 transitions, 12023 flow [2024-06-20 17:04:58,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11659, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12023, PETRI_PLACES=444, PETRI_TRANSITIONS=695} [2024-06-20 17:04:58,300 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-20 17:04:58,300 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 695 transitions, 12023 flow [2024-06-20 17:04:58,300 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) [2024-06-20 17:04:58,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:58,300 INFO 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] [2024-06-20 17:04:58,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 17:04:58,301 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:04:58,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:58,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1602297947, now seen corresponding path program 11 times [2024-06-20 17:04:58,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:58,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141683679] [2024-06-20 17:04:58,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:58,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:01,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:01,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141683679] [2024-06-20 17:05:01,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141683679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:01,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:01,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:05:01,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377818646] [2024-06-20 17:05:01,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:01,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:05:01,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:01,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:05:01,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:05:01,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:01,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 695 transitions, 12023 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) [2024-06-20 17:05:01,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:01,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:01,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:03,822 INFO L124 PetriNetUnfolderBase]: 3823/6215 cut-off events. [2024-06-20 17:05:03,823 INFO L125 PetriNetUnfolderBase]: For 597726/597741 co-relation queries the response was YES. [2024-06-20 17:05:03,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51176 conditions, 6215 events. 3823/6215 cut-off events. For 597726/597741 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 39943 event pairs, 661 based on Foata normal form. 16/6228 useless extension candidates. Maximal degree in co-relation 50982. Up to 5562 conditions per place. [2024-06-20 17:05:03,925 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 598 selfloop transitions, 124 changer transitions 0/727 dead transitions. [2024-06-20 17:05:03,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 727 transitions, 13797 flow [2024-06-20 17:05:03,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:05:03,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:05:03,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-20 17:05:03,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-06-20 17:05:03,926 INFO L175 Difference]: Start difference. First operand has 444 places, 695 transitions, 12023 flow. Second operand 11 states and 175 transitions. [2024-06-20 17:05:03,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 727 transitions, 13797 flow [2024-06-20 17:05:06,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 727 transitions, 13467 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 17:05:06,786 INFO L231 Difference]: Finished difference. Result has 449 places, 698 transitions, 12014 flow [2024-06-20 17:05:06,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11693, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12014, PETRI_PLACES=449, PETRI_TRANSITIONS=698} [2024-06-20 17:05:06,787 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 406 predicate places. [2024-06-20 17:05:06,787 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 698 transitions, 12014 flow [2024-06-20 17:05:06,788 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) [2024-06-20 17:05:06,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:06,788 INFO 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] [2024-06-20 17:05:06,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 17:05:06,789 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:05:06,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:06,790 INFO L85 PathProgramCache]: Analyzing trace with hash 350070089, now seen corresponding path program 14 times [2024-06-20 17:05:06,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:06,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315054857] [2024-06-20 17:05:06,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:06,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:10,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:10,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:10,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315054857] [2024-06-20 17:05:10,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315054857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:10,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:10,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:05:10,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291805271] [2024-06-20 17:05:10,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:10,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:05:10,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:10,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:05:10,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:05:10,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:10,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 698 transitions, 12014 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) [2024-06-20 17:05:10,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:10,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:10,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:12,694 INFO L124 PetriNetUnfolderBase]: 3817/6219 cut-off events. [2024-06-20 17:05:12,695 INFO L125 PetriNetUnfolderBase]: For 596705/596720 co-relation queries the response was YES. [2024-06-20 17:05:12,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50978 conditions, 6219 events. 3817/6219 cut-off events. For 596705/596720 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 40091 event pairs, 627 based on Foata normal form. 16/6232 useless extension candidates. Maximal degree in co-relation 50783. Up to 5299 conditions per place. [2024-06-20 17:05:12,789 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 487 selfloop transitions, 243 changer transitions 0/735 dead transitions. [2024-06-20 17:05:12,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 735 transitions, 13971 flow [2024-06-20 17:05:12,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:05:12,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:05:12,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-20 17:05:12,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-20 17:05:12,793 INFO L175 Difference]: Start difference. First operand has 449 places, 698 transitions, 12014 flow. Second operand 11 states and 189 transitions. [2024-06-20 17:05:12,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 735 transitions, 13971 flow [2024-06-20 17:05:15,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 735 transitions, 13673 flow, removed 33 selfloop flow, removed 11 redundant places. [2024-06-20 17:05:15,684 INFO L231 Difference]: Finished difference. Result has 449 places, 698 transitions, 12236 flow [2024-06-20 17:05:15,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11728, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12236, PETRI_PLACES=449, PETRI_TRANSITIONS=698} [2024-06-20 17:05:15,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 406 predicate places. [2024-06-20 17:05:15,686 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 698 transitions, 12236 flow [2024-06-20 17:05:15,687 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) [2024-06-20 17:05:15,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:15,687 INFO 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] [2024-06-20 17:05:15,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 17:05:15,688 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:05:15,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:15,689 INFO L85 PathProgramCache]: Analyzing trace with hash 897088991, now seen corresponding path program 20 times [2024-06-20 17:05:15,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:15,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289362617] [2024-06-20 17:05:15,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:15,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:18,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:18,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289362617] [2024-06-20 17:05:18,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289362617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:18,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:18,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:05:18,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769684605] [2024-06-20 17:05:18,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:18,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:05:18,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:18,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:05:18,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:05:19,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:19,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 698 transitions, 12236 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) [2024-06-20 17:05:19,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:19,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:19,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:21,750 INFO L124 PetriNetUnfolderBase]: 3814/6231 cut-off events. [2024-06-20 17:05:21,751 INFO L125 PetriNetUnfolderBase]: For 566985/567000 co-relation queries the response was YES. [2024-06-20 17:05:21,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50992 conditions, 6231 events. 3814/6231 cut-off events. For 566985/567000 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 40295 event pairs, 671 based on Foata normal form. 15/6243 useless extension candidates. Maximal degree in co-relation 50799. Up to 5455 conditions per place. [2024-06-20 17:05:21,858 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 523 selfloop transitions, 204 changer transitions 0/732 dead transitions. [2024-06-20 17:05:21,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 732 transitions, 13983 flow [2024-06-20 17:05:21,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:05:21,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:05:21,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-20 17:05:21,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-20 17:05:21,860 INFO L175 Difference]: Start difference. First operand has 449 places, 698 transitions, 12236 flow. Second operand 12 states and 194 transitions. [2024-06-20 17:05:21,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 732 transitions, 13983 flow [2024-06-20 17:05:25,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 732 transitions, 13534 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 17:05:25,112 INFO L231 Difference]: Finished difference. Result has 451 places, 698 transitions, 12218 flow [2024-06-20 17:05:25,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11791, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12218, PETRI_PLACES=451, PETRI_TRANSITIONS=698} [2024-06-20 17:05:25,113 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-20 17:05:25,113 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 698 transitions, 12218 flow [2024-06-20 17:05:25,113 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) [2024-06-20 17:05:25,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:25,113 INFO 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] [2024-06-20 17:05:25,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 17:05:25,113 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:05:25,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:25,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1602292367, now seen corresponding path program 12 times [2024-06-20 17:05:25,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:25,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260963374] [2024-06-20 17:05:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:25,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:28,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:28,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260963374] [2024-06-20 17:05:28,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260963374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:28,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:28,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:05:28,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219437606] [2024-06-20 17:05:28,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:28,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:05:28,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:28,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:05:28,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:05:28,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:28,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 698 transitions, 12218 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) [2024-06-20 17:05:28,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:28,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:28,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:30,760 INFO L124 PetriNetUnfolderBase]: 3808/6201 cut-off events. [2024-06-20 17:05:30,760 INFO L125 PetriNetUnfolderBase]: For 554528/554543 co-relation queries the response was YES. [2024-06-20 17:05:30,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50478 conditions, 6201 events. 3808/6201 cut-off events. For 554528/554543 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 39982 event pairs, 659 based on Foata normal form. 16/6214 useless extension candidates. Maximal degree in co-relation 50286. Up to 5545 conditions per place. [2024-06-20 17:05:30,868 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 596 selfloop transitions, 124 changer transitions 0/725 dead transitions. [2024-06-20 17:05:30,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 725 transitions, 13737 flow [2024-06-20 17:05:30,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:05:30,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:05:30,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-20 17:05:30,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-20 17:05:30,870 INFO L175 Difference]: Start difference. First operand has 451 places, 698 transitions, 12218 flow. Second operand 10 states and 163 transitions. [2024-06-20 17:05:30,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 725 transitions, 13737 flow [2024-06-20 17:05:33,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 725 transitions, 13234 flow, removed 20 selfloop flow, removed 13 redundant places. [2024-06-20 17:05:33,518 INFO L231 Difference]: Finished difference. Result has 448 places, 698 transitions, 11977 flow [2024-06-20 17:05:33,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11715, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11977, PETRI_PLACES=448, PETRI_TRANSITIONS=698} [2024-06-20 17:05:33,518 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-20 17:05:33,518 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 698 transitions, 11977 flow [2024-06-20 17:05:33,519 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) [2024-06-20 17:05:33,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:33,519 INFO 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] [2024-06-20 17:05:33,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 17:05:33,519 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:05:33,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:33,519 INFO L85 PathProgramCache]: Analyzing trace with hash 350064323, now seen corresponding path program 21 times [2024-06-20 17:05:33,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:33,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876402025] [2024-06-20 17:05:33,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:33,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:36,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:36,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876402025] [2024-06-20 17:05:36,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876402025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:36,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:36,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:05:36,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683401313] [2024-06-20 17:05:36,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:36,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:05:36,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:36,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:05:36,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:05:36,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:36,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 698 transitions, 11977 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) [2024-06-20 17:05:36,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:36,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:36,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:39,301 INFO L124 PetriNetUnfolderBase]: 3805/6211 cut-off events. [2024-06-20 17:05:39,302 INFO L125 PetriNetUnfolderBase]: For 531241/531256 co-relation queries the response was YES. [2024-06-20 17:05:39,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49998 conditions, 6211 events. 3805/6211 cut-off events. For 531241/531256 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 40098 event pairs, 664 based on Foata normal form. 15/6223 useless extension candidates. Maximal degree in co-relation 49807. Up to 5444 conditions per place. [2024-06-20 17:05:39,387 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 520 selfloop transitions, 204 changer transitions 0/729 dead transitions. [2024-06-20 17:05:39,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 729 transitions, 13522 flow [2024-06-20 17:05:39,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:05:39,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:05:39,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-20 17:05:39,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 17:05:39,388 INFO L175 Difference]: Start difference. First operand has 448 places, 698 transitions, 11977 flow. Second operand 10 states and 168 transitions. [2024-06-20 17:05:39,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 729 transitions, 13522 flow [2024-06-20 17:05:41,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 729 transitions, 13248 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-20 17:05:41,696 INFO L231 Difference]: Finished difference. Result has 447 places, 698 transitions, 12125 flow [2024-06-20 17:05:41,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11703, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12125, PETRI_PLACES=447, PETRI_TRANSITIONS=698} [2024-06-20 17:05:41,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 404 predicate places. [2024-06-20 17:05:41,708 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 698 transitions, 12125 flow [2024-06-20 17:05:41,708 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) [2024-06-20 17:05:41,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:41,708 INFO 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] [2024-06-20 17:05:41,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 17:05:41,708 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:05:41,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:41,708 INFO L85 PathProgramCache]: Analyzing trace with hash 897089177, now seen corresponding path program 15 times [2024-06-20 17:05:41,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:41,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465729531] [2024-06-20 17:05:41,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:41,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:44,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:44,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465729531] [2024-06-20 17:05:44,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465729531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:44,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:44,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:05:44,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273418437] [2024-06-20 17:05:44,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:44,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:05:44,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:44,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:05:44,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:05:44,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:44,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 698 transitions, 12125 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) [2024-06-20 17:05:44,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:44,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:44,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:47,477 INFO L124 PetriNetUnfolderBase]: 3799/6191 cut-off events. [2024-06-20 17:05:47,477 INFO L125 PetriNetUnfolderBase]: For 518520/518535 co-relation queries the response was YES. [2024-06-20 17:05:47,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49823 conditions, 6191 events. 3799/6191 cut-off events. For 518520/518535 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 39880 event pairs, 623 based on Foata normal form. 16/6204 useless extension candidates. Maximal degree in co-relation 49633. Up to 5278 conditions per place. [2024-06-20 17:05:47,576 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 489 selfloop transitions, 243 changer transitions 0/737 dead transitions. [2024-06-20 17:05:47,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 737 transitions, 13886 flow [2024-06-20 17:05:47,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:05:47,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:05:47,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 215 transitions. [2024-06-20 17:05:47,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39377289377289376 [2024-06-20 17:05:47,578 INFO L175 Difference]: Start difference. First operand has 447 places, 698 transitions, 12125 flow. Second operand 13 states and 215 transitions. [2024-06-20 17:05:47,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 737 transitions, 13886 flow [2024-06-20 17:05:50,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 737 transitions, 13444 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-20 17:05:50,192 INFO L231 Difference]: Finished difference. Result has 450 places, 698 transitions, 12199 flow [2024-06-20 17:05:50,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11685, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12199, PETRI_PLACES=450, PETRI_TRANSITIONS=698} [2024-06-20 17:05:50,192 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-20 17:05:50,192 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 698 transitions, 12199 flow [2024-06-20 17:05:50,192 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) [2024-06-20 17:05:50,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:50,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:50,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 17:05:50,193 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:05:50,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:50,193 INFO L85 PathProgramCache]: Analyzing trace with hash 39595801, now seen corresponding path program 13 times [2024-06-20 17:05:50,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:50,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644763062] [2024-06-20 17:05:50,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:50,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:53,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:53,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644763062] [2024-06-20 17:05:53,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644763062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:53,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:53,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:05:53,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992388826] [2024-06-20 17:05:53,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:53,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:05:53,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:53,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:05:53,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:05:53,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:53,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 698 transitions, 12199 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) [2024-06-20 17:05:53,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:53,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:53,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:55,758 INFO L124 PetriNetUnfolderBase]: 3819/6223 cut-off events. [2024-06-20 17:05:55,758 INFO L125 PetriNetUnfolderBase]: For 530694/530709 co-relation queries the response was YES. [2024-06-20 17:05:55,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50203 conditions, 6223 events. 3819/6223 cut-off events. For 530694/530709 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 40120 event pairs, 663 based on Foata normal form. 18/6238 useless extension candidates. Maximal degree in co-relation 50013. Up to 5444 conditions per place. [2024-06-20 17:05:55,850 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 581 selfloop transitions, 159 changer transitions 0/745 dead transitions. [2024-06-20 17:05:55,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 745 transitions, 14264 flow [2024-06-20 17:05:55,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:05:55,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:05:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-20 17:05:55,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-20 17:05:55,852 INFO L175 Difference]: Start difference. First operand has 450 places, 698 transitions, 12199 flow. Second operand 11 states and 189 transitions. [2024-06-20 17:05:55,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 745 transitions, 14264 flow [2024-06-20 17:05:58,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 745 transitions, 13646 flow, removed 6 selfloop flow, removed 15 redundant places. [2024-06-20 17:05:58,346 INFO L231 Difference]: Finished difference. Result has 446 places, 704 transitions, 12027 flow [2024-06-20 17:05:58,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11589, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12027, PETRI_PLACES=446, PETRI_TRANSITIONS=704} [2024-06-20 17:05:58,347 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-20 17:05:58,347 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 704 transitions, 12027 flow [2024-06-20 17:05:58,347 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) [2024-06-20 17:05:58,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:58,347 INFO 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] [2024-06-20 17:05:58,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 17:05:58,347 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:05:58,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:58,348 INFO L85 PathProgramCache]: Analyzing trace with hash 433041655, now seen corresponding path program 16 times [2024-06-20 17:05:58,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:58,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443696812] [2024-06-20 17:05:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:58,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:01,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:01,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443696812] [2024-06-20 17:06:01,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443696812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:01,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:01,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:06:01,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932826779] [2024-06-20 17:06:01,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:01,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:06:01,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:01,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:06:01,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:06:01,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:01,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 704 transitions, 12027 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) [2024-06-20 17:06:01,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:01,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:01,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:03,584 INFO L124 PetriNetUnfolderBase]: 3829/6257 cut-off events. [2024-06-20 17:06:03,584 INFO L125 PetriNetUnfolderBase]: For 509349/509404 co-relation queries the response was YES. [2024-06-20 17:06:03,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49896 conditions, 6257 events. 3829/6257 cut-off events. For 509349/509404 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40520 event pairs, 614 based on Foata normal form. 43/6289 useless extension candidates. Maximal degree in co-relation 49707. Up to 5229 conditions per place. [2024-06-20 17:06:03,685 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 473 selfloop transitions, 257 changer transitions 0/735 dead transitions. [2024-06-20 17:06:03,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 735 transitions, 13814 flow [2024-06-20 17:06:03,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:06:03,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:06:03,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 17:06:03,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-20 17:06:03,687 INFO L175 Difference]: Start difference. First operand has 446 places, 704 transitions, 12027 flow. Second operand 9 states and 154 transitions. [2024-06-20 17:06:03,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 735 transitions, 13814 flow [2024-06-20 17:06:06,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 735 transitions, 13481 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-20 17:06:06,035 INFO L231 Difference]: Finished difference. Result has 446 places, 707 transitions, 12286 flow [2024-06-20 17:06:06,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11696, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12286, PETRI_PLACES=446, PETRI_TRANSITIONS=707} [2024-06-20 17:06:06,036 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-20 17:06:06,036 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 707 transitions, 12286 flow [2024-06-20 17:06:06,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:06,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:06,037 INFO 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] [2024-06-20 17:06:06,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 17:06:06,037 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:06:06,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:06,037 INFO L85 PathProgramCache]: Analyzing trace with hash 52488391, now seen corresponding path program 14 times [2024-06-20 17:06:06,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:06,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329196847] [2024-06-20 17:06:06,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:06,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:09,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:09,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329196847] [2024-06-20 17:06:09,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329196847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:09,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:09,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:06:09,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133962798] [2024-06-20 17:06:09,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:09,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:06:09,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:09,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:06:09,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:06:09,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:09,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 707 transitions, 12286 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) [2024-06-20 17:06:09,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:09,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:09,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:11,687 INFO L124 PetriNetUnfolderBase]: 3839/6275 cut-off events. [2024-06-20 17:06:11,688 INFO L125 PetriNetUnfolderBase]: For 513001/513056 co-relation queries the response was YES. [2024-06-20 17:06:11,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50606 conditions, 6275 events. 3839/6275 cut-off events. For 513001/513056 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 40692 event pairs, 643 based on Foata normal form. 43/6307 useless extension candidates. Maximal degree in co-relation 50417. Up to 5399 conditions per place. [2024-06-20 17:06:11,785 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 558 selfloop transitions, 174 changer transitions 0/737 dead transitions. [2024-06-20 17:06:11,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 737 transitions, 14251 flow [2024-06-20 17:06:11,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:06:11,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:06:11,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-20 17:06:11,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-20 17:06:11,786 INFO L175 Difference]: Start difference. First operand has 446 places, 707 transitions, 12286 flow. Second operand 10 states and 163 transitions. [2024-06-20 17:06:11,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 737 transitions, 14251 flow [2024-06-20 17:06:14,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 737 transitions, 13791 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 17:06:14,877 INFO L231 Difference]: Finished difference. Result has 450 places, 710 transitions, 12240 flow [2024-06-20 17:06:14,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11826, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12240, PETRI_PLACES=450, PETRI_TRANSITIONS=710} [2024-06-20 17:06:14,877 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-20 17:06:14,878 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 710 transitions, 12240 flow [2024-06-20 17:06:14,878 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) [2024-06-20 17:06:14,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:14,878 INFO 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] [2024-06-20 17:06:14,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 17:06:14,878 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:06:14,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:14,879 INFO L85 PathProgramCache]: Analyzing trace with hash 39601195, now seen corresponding path program 17 times [2024-06-20 17:06:14,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:14,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984707857] [2024-06-20 17:06:14,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:14,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:18,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:18,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:18,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984707857] [2024-06-20 17:06:18,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984707857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:18,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:18,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:06:18,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009975568] [2024-06-20 17:06:18,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:18,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:06:18,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:18,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:06:18,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:06:18,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:18,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 710 transitions, 12240 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) [2024-06-20 17:06:18,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:18,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:18,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:20,341 INFO L124 PetriNetUnfolderBase]: 3859/6291 cut-off events. [2024-06-20 17:06:20,342 INFO L125 PetriNetUnfolderBase]: For 530407/530422 co-relation queries the response was YES. [2024-06-20 17:06:20,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50701 conditions, 6291 events. 3859/6291 cut-off events. For 530407/530422 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 40699 event pairs, 636 based on Foata normal form. 18/6306 useless extension candidates. Maximal degree in co-relation 50511. Up to 5354 conditions per place. [2024-06-20 17:06:20,449 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 500 selfloop transitions, 243 changer transitions 0/748 dead transitions. [2024-06-20 17:06:20,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 748 transitions, 14155 flow [2024-06-20 17:06:20,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:06:20,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:06:20,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 17:06:20,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 17:06:20,450 INFO L175 Difference]: Start difference. First operand has 450 places, 710 transitions, 12240 flow. Second operand 8 states and 147 transitions. [2024-06-20 17:06:20,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 748 transitions, 14155 flow [2024-06-20 17:06:22,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 748 transitions, 13578 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-20 17:06:22,719 INFO L231 Difference]: Finished difference. Result has 450 places, 716 transitions, 12329 flow [2024-06-20 17:06:22,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11663, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12329, PETRI_PLACES=450, PETRI_TRANSITIONS=716} [2024-06-20 17:06:22,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-20 17:06:22,744 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 716 transitions, 12329 flow [2024-06-20 17:06:22,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:22,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:22,745 INFO 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] [2024-06-20 17:06:22,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 17:06:22,745 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:06:22,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:22,745 INFO L85 PathProgramCache]: Analyzing trace with hash 432661099, now seen corresponding path program 22 times [2024-06-20 17:06:22,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:22,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188610197] [2024-06-20 17:06:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:22,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:25,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:25,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188610197] [2024-06-20 17:06:25,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188610197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:25,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:25,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:06:25,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195027457] [2024-06-20 17:06:25,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:25,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:06:25,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:25,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:06:25,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:06:26,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:26,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 716 transitions, 12329 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) [2024-06-20 17:06:26,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:26,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:26,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:28,652 INFO L124 PetriNetUnfolderBase]: 3853/6291 cut-off events. [2024-06-20 17:06:28,652 INFO L125 PetriNetUnfolderBase]: For 523692/523707 co-relation queries the response was YES. [2024-06-20 17:06:28,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50264 conditions, 6291 events. 3853/6291 cut-off events. For 523692/523707 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 40748 event pairs, 682 based on Foata normal form. 16/6304 useless extension candidates. Maximal degree in co-relation 50074. Up to 5347 conditions per place. [2024-06-20 17:06:28,760 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 513 selfloop transitions, 247 changer transitions 0/765 dead transitions. [2024-06-20 17:06:28,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 765 transitions, 14370 flow [2024-06-20 17:06:28,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:06:28,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:06:28,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-20 17:06:28,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-20 17:06:28,762 INFO L175 Difference]: Start difference. First operand has 450 places, 716 transitions, 12329 flow. Second operand 10 states and 189 transitions. [2024-06-20 17:06:28,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 765 transitions, 14370 flow [2024-06-20 17:06:31,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 765 transitions, 13892 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-20 17:06:31,296 INFO L231 Difference]: Finished difference. Result has 453 places, 716 transitions, 12383 flow [2024-06-20 17:06:31,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11859, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12383, PETRI_PLACES=453, PETRI_TRANSITIONS=716} [2024-06-20 17:06:31,297 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 410 predicate places. [2024-06-20 17:06:31,297 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 716 transitions, 12383 flow [2024-06-20 17:06:31,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:31,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:31,297 INFO 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] [2024-06-20 17:06:31,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 17:06:31,297 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:06:31,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:31,298 INFO L85 PathProgramCache]: Analyzing trace with hash 39601381, now seen corresponding path program 15 times [2024-06-20 17:06:31,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:31,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405316224] [2024-06-20 17:06:31,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:31,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:34,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:34,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405316224] [2024-06-20 17:06:34,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405316224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:34,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:34,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:06:34,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963128863] [2024-06-20 17:06:34,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:34,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:06:34,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:34,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:06:34,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:06:34,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:34,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 716 transitions, 12383 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) [2024-06-20 17:06:34,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:34,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:34,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:36,879 INFO L124 PetriNetUnfolderBase]: 3841/6257 cut-off events. [2024-06-20 17:06:36,879 INFO L125 PetriNetUnfolderBase]: For 507295/507310 co-relation queries the response was YES. [2024-06-20 17:06:36,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49615 conditions, 6257 events. 3841/6257 cut-off events. For 507295/507310 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 40419 event pairs, 667 based on Foata normal form. 18/6272 useless extension candidates. Maximal degree in co-relation 49426. Up to 5482 conditions per place. [2024-06-20 17:06:36,966 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 585 selfloop transitions, 159 changer transitions 0/749 dead transitions. [2024-06-20 17:06:36,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 749 transitions, 14154 flow [2024-06-20 17:06:36,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:06:36,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:06:36,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 17:06:36,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-20 17:06:36,968 INFO L175 Difference]: Start difference. First operand has 453 places, 716 transitions, 12383 flow. Second operand 9 states and 158 transitions. [2024-06-20 17:06:36,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 749 transitions, 14154 flow [2024-06-20 17:06:39,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 749 transitions, 13506 flow, removed 28 selfloop flow, removed 11 redundant places. [2024-06-20 17:06:39,421 INFO L231 Difference]: Finished difference. Result has 451 places, 716 transitions, 12086 flow [2024-06-20 17:06:39,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11741, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12086, PETRI_PLACES=451, PETRI_TRANSITIONS=716} [2024-06-20 17:06:39,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-20 17:06:39,422 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 716 transitions, 12086 flow [2024-06-20 17:06:39,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:39,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:39,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:39,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 17:06:39,422 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:06:39,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:39,422 INFO L85 PathProgramCache]: Analyzing trace with hash 39589849, now seen corresponding path program 23 times [2024-06-20 17:06:39,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:39,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893251544] [2024-06-20 17:06:39,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:39,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:42,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:42,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893251544] [2024-06-20 17:06:42,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893251544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:42,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:42,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:06:42,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383658568] [2024-06-20 17:06:42,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:42,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:06:42,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:42,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:06:42,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:06:42,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:42,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 716 transitions, 12086 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) [2024-06-20 17:06:42,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:42,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:42,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15