./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix002.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix002.oepc.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/mix002.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix002.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 15:40:39,400 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:40:39,470 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:40:39,474 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:40:39,475 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:40:39,498 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:40:39,499 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:40:39,499 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:40:39,500 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:40:39,503 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:40:39,503 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:40:39,503 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:40:39,504 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:40:39,505 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:40:39,505 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:40:39,505 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:40:39,505 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:40:39,505 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:40:39,506 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:40:39,506 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:40:39,506 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:40:39,506 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:40:39,507 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:40:39,507 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:40:39,507 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:40:39,507 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:40:39,507 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:40:39,507 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:40:39,508 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:40:39,508 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:40:39,509 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:40:39,510 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:40:39,510 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:40:39,510 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:40:39,511 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:40:39,511 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:40:39,511 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:40:39,511 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:40:39,511 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:40:39,511 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:40:39,511 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:40:39,512 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:40:39,512 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:40:39,512 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:40:39,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:40:39,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:40:39,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:40:39,718 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:40:39,718 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:40:39,719 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix002.oepc.i [2024-06-20 15:40:40,820 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:40:41,029 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:40:41,030 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix002.oepc.i [2024-06-20 15:40:41,041 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d88b2b28b/2a95cdfac963465fa62e54ad274c97c8/FLAG641c83564 [2024-06-20 15:40:41,054 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d88b2b28b/2a95cdfac963465fa62e54ad274c97c8 [2024-06-20 15:40:41,056 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:40:41,056 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:40:41,057 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix002.oepc.yml/witness.yml [2024-06-20 15:40:41,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:40:41,186 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:40:41,187 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:40:41,187 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:40:41,191 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:40:41,191 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:40:41" (1/2) ... [2024-06-20 15:40:41,192 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34bf80a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:40:41, skipping insertion in model container [2024-06-20 15:40:41,193 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:40:41" (1/2) ... [2024-06-20 15:40:41,194 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1a473f4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:40:41, skipping insertion in model container [2024-06-20 15:40:41,195 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:40:41" (2/2) ... [2024-06-20 15:40:41,195 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34bf80a4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:40:41, skipping insertion in model container [2024-06-20 15:40:41,195 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:40:41" (2/2) ... [2024-06-20 15:40:41,196 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:40:41,284 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:40:41,285 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] ((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-20 15:40:41,285 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-20 15:40:41,285 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-20 15:40:41,285 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:40:41,286 INFO L106 edCorrectnessWitness]: ghost_update [L856-L856] multithreaded = 1; [2024-06-20 15:40:41,325 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:40:41,588 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:40:41,595 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:40:41,697 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:40:41,725 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:40:41,726 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:40:41 WrapperNode [2024-06-20 15:40:41,726 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:40:41,727 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:40:41,727 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:40:41,727 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:40:41,732 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 03:40:41" (1/1) ... [2024-06-20 15:40:41,750 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 03:40:41" (1/1) ... [2024-06-20 15:40:41,793 INFO L138 Inliner]: procedures = 175, calls = 51, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 136 [2024-06-20 15:40:41,797 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:40:41,798 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:40:41,798 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:40:41,799 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:40:41,806 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 03:40:41" (1/1) ... [2024-06-20 15:40:41,807 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 03:40:41" (1/1) ... [2024-06-20 15:40:41,810 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 03:40:41" (1/1) ... [2024-06-20 15:40:41,824 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 15:40:41,824 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 03:40:41" (1/1) ... [2024-06-20 15:40:41,824 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 03:40:41" (1/1) ... [2024-06-20 15:40:41,832 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 03:40:41" (1/1) ... [2024-06-20 15:40:41,833 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 03:40:41" (1/1) ... [2024-06-20 15:40:41,834 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 03:40:41" (1/1) ... [2024-06-20 15:40:41,836 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 03:40:41" (1/1) ... [2024-06-20 15:40:41,838 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:40:41,839 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:40:41,839 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:40:41,839 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:40:41,840 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 03:40:41" (1/1) ... [2024-06-20 15:40:41,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:40:41,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:40:41,861 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 15:40:41,868 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 15:40:41,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:40:41,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:40:41,889 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:40:41,890 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:40:41,890 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:40:41,890 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:40:41,890 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 15:40:41,890 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 15:40:41,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:40:41,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:40:41,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:40:41,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:40:41,892 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 15:40:41,981 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:40:41,983 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:40:42,314 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:40:42,316 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:40:42,478 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:40:42,478 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:40:42,479 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:40:42 BoogieIcfgContainer [2024-06-20 15:40:42,479 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:40:42,481 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:40:42,482 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:40:42,484 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:40:42,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:40:41" (1/4) ... [2024-06-20 15:40:42,486 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3930b3d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:40:42, skipping insertion in model container [2024-06-20 15:40:42,486 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:40:41" (2/4) ... [2024-06-20 15:40:42,486 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3930b3d3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:40:42, skipping insertion in model container [2024-06-20 15:40:42,487 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 03:40:41" (3/4) ... [2024-06-20 15:40:42,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3930b3d3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:40:42, skipping insertion in model container [2024-06-20 15:40:42,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:40:42" (4/4) ... [2024-06-20 15:40:42,488 INFO L112 eAbstractionObserver]: Analyzing ICFG mix002.oepc.i [2024-06-20 15:40:42,501 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:40:42,502 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 15:40:42,502 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:40:42,544 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:40:42,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-20 15:40:42,623 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-20 15:40:42,623 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:40:42,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 78 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 15:40:42,626 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-20 15:40:42,629 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-20 15:40:42,642 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:40:42,652 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;@5141c58b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:40:42,652 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 15:40:42,655 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:40:42,655 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 15:40:42,655 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:40:42,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:42,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:40:42,656 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 15:40:42,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:42,702 INFO L85 PathProgramCache]: Analyzing trace with hash 385953887, now seen corresponding path program 1 times [2024-06-20 15:40:42,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:42,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771343673] [2024-06-20 15:40:42,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:42,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:43,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:43,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771343673] [2024-06-20 15:40:43,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771343673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:43,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:43,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:40:43,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899349349] [2024-06-20 15:40:43,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:43,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:40:43,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:43,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:40:43,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:40:43,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-06-20 15:40:43,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 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 15:40:43,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:43,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-06-20 15:40:43,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:44,298 INFO L124 PetriNetUnfolderBase]: 1363/2141 cut-off events. [2024-06-20 15:40:44,298 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-20 15:40:44,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4265 conditions, 2141 events. 1363/2141 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11056 event pairs, 964 based on Foata normal form. 1/2084 useless extension candidates. Maximal degree in co-relation 4253. Up to 2037 conditions per place. [2024-06-20 15:40:44,312 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 32 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-20 15:40:44,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 177 flow [2024-06-20 15:40:44,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:40:44,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:40:44,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-06-20 15:40:44,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-06-20 15:40:44,322 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 84 transitions. [2024-06-20 15:40:44,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 177 flow [2024-06-20 15:40:44,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:40:44,326 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-20 15:40:44,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-20 15:40:44,329 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-20 15:40:44,329 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-20 15:40:44,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 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 15:40:44,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:44,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:44,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:40:44,330 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 15:40:44,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:44,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1534536062, now seen corresponding path program 1 times [2024-06-20 15:40:44,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:44,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078248756] [2024-06-20 15:40:44,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:44,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:44,949 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 15:40:44,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:44,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078248756] [2024-06-20 15:40:44,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078248756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:44,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:44,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:40:44,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103776786] [2024-06-20 15:40:44,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:44,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:40:44,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:44,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:40:44,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:40:45,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-06-20 15:40:45,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:45,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:45,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-06-20 15:40:45,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:45,307 INFO L124 PetriNetUnfolderBase]: 1357/2132 cut-off events. [2024-06-20 15:40:45,307 INFO L125 PetriNetUnfolderBase]: For 420/420 co-relation queries the response was YES. [2024-06-20 15:40:45,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4799 conditions, 2132 events. 1357/2132 cut-off events. For 420/420 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11006 event pairs, 840 based on Foata normal form. 3/2111 useless extension candidates. Maximal degree in co-relation 4787. Up to 2013 conditions per place. [2024-06-20 15:40:45,336 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 39 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-20 15:40:45,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 244 flow [2024-06-20 15:40:45,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:40:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:40:45,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-20 15:40:45,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6193181818181818 [2024-06-20 15:40:45,339 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 109 transitions. [2024-06-20 15:40:45,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 244 flow [2024-06-20 15:40:45,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:40:45,342 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-20 15:40:45,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-20 15:40:45,343 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-20 15:40:45,343 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-20 15:40:45,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:45,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:45,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:45,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:40:45,346 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 15:40:45,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:45,346 INFO L85 PathProgramCache]: Analyzing trace with hash 325978918, now seen corresponding path program 1 times [2024-06-20 15:40:45,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:45,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576172476] [2024-06-20 15:40:45,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:45,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:46,155 INFO 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 15:40:46,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:46,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576172476] [2024-06-20 15:40:46,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576172476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:46,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:46,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:40:46,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86173392] [2024-06-20 15:40:46,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:46,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:40:46,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:46,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:40:46,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:40:46,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-20 15:40:46,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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 15:40:46,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:46,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-20 15:40:46,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:46,597 INFO L124 PetriNetUnfolderBase]: 1598/2508 cut-off events. [2024-06-20 15:40:46,597 INFO L125 PetriNetUnfolderBase]: For 1348/1348 co-relation queries the response was YES. [2024-06-20 15:40:46,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6220 conditions, 2508 events. 1598/2508 cut-off events. For 1348/1348 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12994 event pairs, 915 based on Foata normal form. 3/2493 useless extension candidates. Maximal degree in co-relation 6206. Up to 2350 conditions per place. [2024-06-20 15:40:46,609 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 47 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-20 15:40:46,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 324 flow [2024-06-20 15:40:46,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:40:46,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:40:46,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-20 15:40:46,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-20 15:40:46,614 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 130 transitions. [2024-06-20 15:40:46,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 324 flow [2024-06-20 15:40:46,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 310 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 15:40:46,617 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 178 flow [2024-06-20 15:40:46,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-20 15:40:46,618 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2024-06-20 15:40:46,618 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 178 flow [2024-06-20 15:40:46,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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 15:40:46,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:46,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:46,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:40:46,619 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 15:40:46,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:46,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2097231379, now seen corresponding path program 1 times [2024-06-20 15:40:46,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:46,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011922379] [2024-06-20 15:40:46,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:46,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:47,461 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 15:40:47,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:47,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011922379] [2024-06-20 15:40:47,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011922379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:47,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:47,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:40:47,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969075292] [2024-06-20 15:40:47,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:47,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:40:47,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:47,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:40:47,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:40:47,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-20 15:40:47,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 178 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:47,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:47,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-20 15:40:47,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:47,892 INFO L124 PetriNetUnfolderBase]: 1592/2521 cut-off events. [2024-06-20 15:40:47,892 INFO L125 PetriNetUnfolderBase]: For 2509/2509 co-relation queries the response was YES. [2024-06-20 15:40:47,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6813 conditions, 2521 events. 1592/2521 cut-off events. For 2509/2509 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13176 event pairs, 791 based on Foata normal form. 3/2498 useless extension candidates. Maximal degree in co-relation 6798. Up to 2326 conditions per place. [2024-06-20 15:40:47,905 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 54 selfloop transitions, 13 changer transitions 0/75 dead transitions. [2024-06-20 15:40:47,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 75 transitions, 402 flow [2024-06-20 15:40:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:40:47,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:40:47,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-20 15:40:47,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-20 15:40:47,907 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 178 flow. Second operand 6 states and 154 transitions. [2024-06-20 15:40:47,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 75 transitions, 402 flow [2024-06-20 15:40:47,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 378 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 15:40:47,909 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 214 flow [2024-06-20 15:40:47,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2024-06-20 15:40:47,910 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-06-20 15:40:47,910 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 214 flow [2024-06-20 15:40:47,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:47,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:47,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:47,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:40:47,911 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 15:40:47,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:47,911 INFO L85 PathProgramCache]: Analyzing trace with hash -988304806, now seen corresponding path program 1 times [2024-06-20 15:40:47,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:47,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716205856] [2024-06-20 15:40:47,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:47,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:48,603 INFO 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 15:40:48,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:48,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716205856] [2024-06-20 15:40:48,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716205856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:48,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:48,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:40:48,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173728241] [2024-06-20 15:40:48,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:48,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:40:48,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:48,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:40:48,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:40:48,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 15:40:48,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:48,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:48,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 15:40:48,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:49,199 INFO L124 PetriNetUnfolderBase]: 2130/3329 cut-off events. [2024-06-20 15:40:49,200 INFO L125 PetriNetUnfolderBase]: For 5096/5096 co-relation queries the response was YES. [2024-06-20 15:40:49,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9592 conditions, 3329 events. 2130/3329 cut-off events. For 5096/5096 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17244 event pairs, 1193 based on Foata normal form. 2/3328 useless extension candidates. Maximal degree in co-relation 9575. Up to 3145 conditions per place. [2024-06-20 15:40:49,215 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 46 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-20 15:40:49,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 366 flow [2024-06-20 15:40:49,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:40:49,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:40:49,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-06-20 15:40:49,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-20 15:40:49,217 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 214 flow. Second operand 5 states and 103 transitions. [2024-06-20 15:40:49,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 366 flow [2024-06-20 15:40:49,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 332 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 15:40:49,220 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 226 flow [2024-06-20 15:40:49,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-20 15:40:49,220 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2024-06-20 15:40:49,220 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 226 flow [2024-06-20 15:40:49,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:49,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:49,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:49,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:40:49,221 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:49,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:49,222 INFO L85 PathProgramCache]: Analyzing trace with hash 318164924, now seen corresponding path program 1 times [2024-06-20 15:40:49,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:49,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338961575] [2024-06-20 15:40:49,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:49,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:50,517 INFO 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 15:40:50,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:50,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338961575] [2024-06-20 15:40:50,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338961575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:50,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:50,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:40:50,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764952572] [2024-06-20 15:40:50,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:50,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:40:50,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:50,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:40:50,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:40:50,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-20 15:40:50,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 226 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:50,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:50,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-20 15:40:50,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:51,217 INFO L124 PetriNetUnfolderBase]: 2074/3265 cut-off events. [2024-06-20 15:40:51,217 INFO L125 PetriNetUnfolderBase]: For 7245/7245 co-relation queries the response was YES. [2024-06-20 15:40:51,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10065 conditions, 3265 events. 2074/3265 cut-off events. For 7245/7245 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 17191 event pairs, 843 based on Foata normal form. 3/3260 useless extension candidates. Maximal degree in co-relation 10047. Up to 2972 conditions per place. [2024-06-20 15:40:51,234 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 71 selfloop transitions, 19 changer transitions 0/98 dead transitions. [2024-06-20 15:40:51,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 98 transitions, 548 flow [2024-06-20 15:40:51,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:40:51,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:40:51,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 15:40:51,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5539772727272727 [2024-06-20 15:40:51,236 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 226 flow. Second operand 8 states and 195 transitions. [2024-06-20 15:40:51,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 98 transitions, 548 flow [2024-06-20 15:40:51,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 98 transitions, 526 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 15:40:51,240 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 298 flow [2024-06-20 15:40:51,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=298, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-20 15:40:51,241 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-20 15:40:51,241 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 298 flow [2024-06-20 15:40:51,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:51,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:51,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:51,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:40:51,242 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 15:40:51,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:51,242 INFO L85 PathProgramCache]: Analyzing trace with hash -572676264, now seen corresponding path program 1 times [2024-06-20 15:40:51,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:51,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932268351] [2024-06-20 15:40:51,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:51,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:52,010 INFO 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 15:40:52,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:52,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932268351] [2024-06-20 15:40:52,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932268351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:52,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:52,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:40:52,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663173385] [2024-06-20 15:40:52,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:52,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:40:52,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:52,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:40:52,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:40:52,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 15:40:52,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 298 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:52,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:52,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 15:40:52,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:52,705 INFO L124 PetriNetUnfolderBase]: 2106/3305 cut-off events. [2024-06-20 15:40:52,706 INFO L125 PetriNetUnfolderBase]: For 10174/10174 co-relation queries the response was YES. [2024-06-20 15:40:52,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11060 conditions, 3305 events. 2106/3305 cut-off events. For 10174/10174 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17196 event pairs, 886 based on Foata normal form. 4/3306 useless extension candidates. Maximal degree in co-relation 11040. Up to 3104 conditions per place. [2024-06-20 15:40:52,720 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 57 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-20 15:40:52,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 75 transitions, 496 flow [2024-06-20 15:40:52,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:40:52,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:40:52,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-20 15:40:52,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-20 15:40:52,722 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 298 flow. Second operand 6 states and 122 transitions. [2024-06-20 15:40:52,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 75 transitions, 496 flow [2024-06-20 15:40:52,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 75 transitions, 446 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:40:52,725 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 306 flow [2024-06-20 15:40:52,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=306, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-06-20 15:40:52,726 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 17 predicate places. [2024-06-20 15:40:52,726 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 306 flow [2024-06-20 15:40:52,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:52,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:52,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:52,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:40:52,727 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 15:40:52,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:52,727 INFO L85 PathProgramCache]: Analyzing trace with hash -580721799, now seen corresponding path program 1 times [2024-06-20 15:40:52,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:52,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640732054] [2024-06-20 15:40:52,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:52,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:53,597 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 15:40:53,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:53,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640732054] [2024-06-20 15:40:53,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640732054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:53,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:53,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:40:53,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656640233] [2024-06-20 15:40:53,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:53,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:40:53,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:53,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:40:53,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:40:53,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 15:40:53,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 306 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:53,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:53,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 15:40:53,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:54,128 INFO L124 PetriNetUnfolderBase]: 2123/3361 cut-off events. [2024-06-20 15:40:54,129 INFO L125 PetriNetUnfolderBase]: For 12609/12615 co-relation queries the response was YES. [2024-06-20 15:40:54,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11835 conditions, 3361 events. 2123/3361 cut-off events. For 12609/12615 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17616 event pairs, 887 based on Foata normal form. 6/3363 useless extension candidates. Maximal degree in co-relation 11813. Up to 3103 conditions per place. [2024-06-20 15:40:54,142 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 62 selfloop transitions, 16 changer transitions 0/85 dead transitions. [2024-06-20 15:40:54,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 588 flow [2024-06-20 15:40:54,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:40:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:40:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-20 15:40:54,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-20 15:40:54,144 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 306 flow. Second operand 6 states and 128 transitions. [2024-06-20 15:40:54,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 588 flow [2024-06-20 15:40:54,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 85 transitions, 554 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 15:40:54,148 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 366 flow [2024-06-20 15:40:54,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=366, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2024-06-20 15:40:54,148 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 19 predicate places. [2024-06-20 15:40:54,148 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 366 flow [2024-06-20 15:40:54,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:54,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:54,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:54,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:40:54,149 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 15:40:54,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:54,150 INFO L85 PathProgramCache]: Analyzing trace with hash 687200211, now seen corresponding path program 2 times [2024-06-20 15:40:54,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:54,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562431627] [2024-06-20 15:40:54,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:54,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:54,856 INFO 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 15:40:54,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:54,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562431627] [2024-06-20 15:40:54,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562431627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:54,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:54,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:40:54,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592383822] [2024-06-20 15:40:54,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:54,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:40:54,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:54,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:40:54,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:40:54,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 15:40:54,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 366 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:54,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:54,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 15:40:54,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:55,474 INFO L124 PetriNetUnfolderBase]: 2118/3353 cut-off events. [2024-06-20 15:40:55,474 INFO L125 PetriNetUnfolderBase]: For 15639/15639 co-relation queries the response was YES. [2024-06-20 15:40:55,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12494 conditions, 3353 events. 2118/3353 cut-off events. For 15639/15639 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17607 event pairs, 883 based on Foata normal form. 2/3352 useless extension candidates. Maximal degree in co-relation 12471. Up to 3122 conditions per place. [2024-06-20 15:40:55,488 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 62 selfloop transitions, 11 changer transitions 0/80 dead transitions. [2024-06-20 15:40:55,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 80 transitions, 550 flow [2024-06-20 15:40:55,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:40:55,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:40:55,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-20 15:40:55,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-20 15:40:55,490 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 366 flow. Second operand 6 states and 121 transitions. [2024-06-20 15:40:55,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 80 transitions, 550 flow [2024-06-20 15:40:55,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 80 transitions, 510 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-20 15:40:55,497 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 356 flow [2024-06-20 15:40:55,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=356, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2024-06-20 15:40:55,498 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 23 predicate places. [2024-06-20 15:40:55,498 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 356 flow [2024-06-20 15:40:55,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:55,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:55,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:55,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:40:55,499 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:55,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:55,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1273179428, now seen corresponding path program 1 times [2024-06-20 15:40:55,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:55,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25430336] [2024-06-20 15:40:55,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:55,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:56,885 INFO 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 15:40:56,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:56,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25430336] [2024-06-20 15:40:56,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25430336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:56,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:56,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:40:56,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564333273] [2024-06-20 15:40:56,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:56,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:40:56,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:56,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:40:56,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:40:57,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-20 15:40:57,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 356 flow. Second operand has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:57,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:57,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-20 15:40:57,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:57,636 INFO L124 PetriNetUnfolderBase]: 2070/3275 cut-off events. [2024-06-20 15:40:57,637 INFO L125 PetriNetUnfolderBase]: For 18726/18726 co-relation queries the response was YES. [2024-06-20 15:40:57,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12523 conditions, 3275 events. 2070/3275 cut-off events. For 18726/18726 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17316 event pairs, 662 based on Foata normal form. 6/3263 useless extension candidates. Maximal degree in co-relation 12499. Up to 2927 conditions per place. [2024-06-20 15:40:57,651 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 82 selfloop transitions, 21 changer transitions 0/113 dead transitions. [2024-06-20 15:40:57,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 113 transitions, 700 flow [2024-06-20 15:40:57,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:40:57,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:40:57,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-20 15:40:57,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404040404040404 [2024-06-20 15:40:57,653 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 356 flow. Second operand 9 states and 214 transitions. [2024-06-20 15:40:57,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 113 transitions, 700 flow [2024-06-20 15:40:57,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 113 transitions, 670 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 15:40:57,661 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 397 flow [2024-06-20 15:40:57,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=397, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2024-06-20 15:40:57,662 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2024-06-20 15:40:57,662 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 397 flow [2024-06-20 15:40:57,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:57,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:57,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:57,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:40:57,663 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 15:40:57,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:57,663 INFO L85 PathProgramCache]: Analyzing trace with hash -822684673, now seen corresponding path program 1 times [2024-06-20 15:40:57,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:57,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855994950] [2024-06-20 15:40:57,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:57,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:58,597 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 15:40:58,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:58,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855994950] [2024-06-20 15:40:58,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855994950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:58,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:58,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:40:58,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125654247] [2024-06-20 15:40:58,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:58,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:40:58,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:58,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:40:58,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:40:58,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:40:58,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 397 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:58,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:58,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:40:58,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:59,118 INFO L124 PetriNetUnfolderBase]: 2222/3432 cut-off events. [2024-06-20 15:40:59,119 INFO L125 PetriNetUnfolderBase]: For 22439/22445 co-relation queries the response was YES. [2024-06-20 15:40:59,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13698 conditions, 3432 events. 2222/3432 cut-off events. For 22439/22445 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17488 event pairs, 830 based on Foata normal form. 6/3434 useless extension candidates. Maximal degree in co-relation 13673. Up to 3199 conditions per place. [2024-06-20 15:40:59,137 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 70 selfloop transitions, 24 changer transitions 0/99 dead transitions. [2024-06-20 15:40:59,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 99 transitions, 753 flow [2024-06-20 15:40:59,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:40:59,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:40:59,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-20 15:40:59,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-20 15:40:59,139 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 397 flow. Second operand 7 states and 143 transitions. [2024-06-20 15:40:59,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 99 transitions, 753 flow [2024-06-20 15:40:59,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 99 transitions, 688 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 15:40:59,152 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 454 flow [2024-06-20 15:40:59,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=454, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-20 15:40:59,152 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2024-06-20 15:40:59,153 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 454 flow [2024-06-20 15:40:59,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:59,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:59,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:59,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:40:59,153 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 15:40:59,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:59,154 INFO L85 PathProgramCache]: Analyzing trace with hash -822504935, now seen corresponding path program 1 times [2024-06-20 15:40:59,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:59,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228323473] [2024-06-20 15:40:59,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:59,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:00,050 INFO 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 15:41:00,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:00,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228323473] [2024-06-20 15:41:00,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228323473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:00,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:00,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:41:00,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831766849] [2024-06-20 15:41:00,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:00,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:41:00,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:00,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:41:00,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:41:00,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 15:41:00,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 454 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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 15:41:00,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:00,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 15:41:00,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:00,697 INFO L124 PetriNetUnfolderBase]: 2164/3388 cut-off events. [2024-06-20 15:41:00,698 INFO L125 PetriNetUnfolderBase]: For 27272/27278 co-relation queries the response was YES. [2024-06-20 15:41:00,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14152 conditions, 3388 events. 2164/3388 cut-off events. For 27272/27278 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17606 event pairs, 785 based on Foata normal form. 5/3388 useless extension candidates. Maximal degree in co-relation 14125. Up to 3093 conditions per place. [2024-06-20 15:41:00,713 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 75 selfloop transitions, 23 changer transitions 0/107 dead transitions. [2024-06-20 15:41:00,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 107 transitions, 832 flow [2024-06-20 15:41:00,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:41:00,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:41:00,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-20 15:41:00,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4837662337662338 [2024-06-20 15:41:00,715 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 454 flow. Second operand 7 states and 149 transitions. [2024-06-20 15:41:00,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 107 transitions, 832 flow [2024-06-20 15:41:00,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 107 transitions, 786 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-20 15:41:00,729 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 556 flow [2024-06-20 15:41:00,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=556, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-06-20 15:41:00,730 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 31 predicate places. [2024-06-20 15:41:00,730 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 556 flow [2024-06-20 15:41:00,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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 15:41:00,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:00,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:00,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:41:00,731 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 15:41:00,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:00,731 INFO L85 PathProgramCache]: Analyzing trace with hash -822505183, now seen corresponding path program 2 times [2024-06-20 15:41:00,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:00,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229910165] [2024-06-20 15:41:00,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:00,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:01,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:01,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229910165] [2024-06-20 15:41:01,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229910165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:01,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:01,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:41:01,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769320809] [2024-06-20 15:41:01,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:01,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:41:01,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:01,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:41:01,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:41:01,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:01,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 556 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:01,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:01,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:01,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:02,254 INFO L124 PetriNetUnfolderBase]: 2333/3604 cut-off events. [2024-06-20 15:41:02,254 INFO L125 PetriNetUnfolderBase]: For 32904/32907 co-relation queries the response was YES. [2024-06-20 15:41:02,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16073 conditions, 3604 events. 2333/3604 cut-off events. For 32904/32907 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18329 event pairs, 814 based on Foata normal form. 4/3604 useless extension candidates. Maximal degree in co-relation 16043. Up to 3365 conditions per place. [2024-06-20 15:41:02,276 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 89 selfloop transitions, 28 changer transitions 0/122 dead transitions. [2024-06-20 15:41:02,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 122 transitions, 1055 flow [2024-06-20 15:41:02,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:02,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 15:41:02,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-20 15:41:02,277 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 556 flow. Second operand 8 states and 150 transitions. [2024-06-20 15:41:02,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 122 transitions, 1055 flow [2024-06-20 15:41:02,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 122 transitions, 1019 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-20 15:41:02,298 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 790 flow [2024-06-20 15:41:02,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=790, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2024-06-20 15:41:02,299 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2024-06-20 15:41:02,299 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 790 flow [2024-06-20 15:41:02,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:02,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:02,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:02,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:41:02,299 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 15:41:02,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:02,300 INFO L85 PathProgramCache]: Analyzing trace with hash -171628289, now seen corresponding path program 2 times [2024-06-20 15:41:02,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:02,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156623817] [2024-06-20 15:41:02,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:02,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:03,199 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 15:41:03,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:03,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156623817] [2024-06-20 15:41:03,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156623817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:03,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:03,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:41:03,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532299469] [2024-06-20 15:41:03,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:03,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:41:03,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:03,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:41:03,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:41:03,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 15:41:03,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 790 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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 15:41:03,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:03,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 15:41:03,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:03,846 INFO L124 PetriNetUnfolderBase]: 2261/3540 cut-off events. [2024-06-20 15:41:03,846 INFO L125 PetriNetUnfolderBase]: For 37304/37327 co-relation queries the response was YES. [2024-06-20 15:41:03,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16286 conditions, 3540 events. 2261/3540 cut-off events. For 37304/37327 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18408 event pairs, 810 based on Foata normal form. 20/3556 useless extension candidates. Maximal degree in co-relation 16250. Up to 3251 conditions per place. [2024-06-20 15:41:03,863 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 91 selfloop transitions, 21 changer transitions 0/125 dead transitions. [2024-06-20 15:41:03,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 125 transitions, 1162 flow [2024-06-20 15:41:03,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:03,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:03,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 15:41:03,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-20 15:41:03,865 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 790 flow. Second operand 8 states and 156 transitions. [2024-06-20 15:41:03,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 125 transitions, 1162 flow [2024-06-20 15:41:03,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 125 transitions, 1140 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-20 15:41:03,891 INFO L231 Difference]: Finished difference. Result has 92 places, 103 transitions, 856 flow [2024-06-20 15:41:03,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=856, PETRI_PLACES=92, PETRI_TRANSITIONS=103} [2024-06-20 15:41:03,892 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 47 predicate places. [2024-06-20 15:41:03,892 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 103 transitions, 856 flow [2024-06-20 15:41:03,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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 15:41:03,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:03,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:03,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:41:03,893 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 15:41:03,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:03,893 INFO L85 PathProgramCache]: Analyzing trace with hash -586329823, now seen corresponding path program 3 times [2024-06-20 15:41:03,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:03,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770120823] [2024-06-20 15:41:03,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:03,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:03,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:04,938 INFO 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 15:41:04,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:04,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770120823] [2024-06-20 15:41:04,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770120823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:04,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:04,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:41:04,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479233534] [2024-06-20 15:41:04,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:04,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:41:04,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:04,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:41:04,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:41:05,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:05,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 103 transitions, 856 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:05,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:05,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:05,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:05,683 INFO L124 PetriNetUnfolderBase]: 2350/3627 cut-off events. [2024-06-20 15:41:05,684 INFO L125 PetriNetUnfolderBase]: For 41453/41453 co-relation queries the response was YES. [2024-06-20 15:41:05,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17067 conditions, 3627 events. 2350/3627 cut-off events. For 41453/41453 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18447 event pairs, 810 based on Foata normal form. 2/3626 useless extension candidates. Maximal degree in co-relation 17028. Up to 3441 conditions per place. [2024-06-20 15:41:05,705 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 100 selfloop transitions, 16 changer transitions 0/121 dead transitions. [2024-06-20 15:41:05,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 121 transitions, 1134 flow [2024-06-20 15:41:05,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:05,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:05,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 15:41:05,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-20 15:41:05,706 INFO L175 Difference]: Start difference. First operand has 92 places, 103 transitions, 856 flow. Second operand 8 states and 143 transitions. [2024-06-20 15:41:05,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 121 transitions, 1134 flow [2024-06-20 15:41:05,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 121 transitions, 1037 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-20 15:41:05,736 INFO L231 Difference]: Finished difference. Result has 93 places, 103 transitions, 799 flow [2024-06-20 15:41:05,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=799, PETRI_PLACES=93, PETRI_TRANSITIONS=103} [2024-06-20 15:41:05,737 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 48 predicate places. [2024-06-20 15:41:05,737 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 103 transitions, 799 flow [2024-06-20 15:41:05,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:05,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:05,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:05,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:41:05,738 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 15:41:05,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:05,738 INFO L85 PathProgramCache]: Analyzing trace with hash -586032905, now seen corresponding path program 3 times [2024-06-20 15:41:05,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:05,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693648880] [2024-06-20 15:41:05,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:05,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:06,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:06,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693648880] [2024-06-20 15:41:06,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693648880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:06,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:06,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:41:06,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639657705] [2024-06-20 15:41:06,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:06,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:41:06,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:06,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:41:06,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:41:06,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 15:41:06,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 103 transitions, 799 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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 15:41:06,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:06,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 15:41:06,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:07,293 INFO L124 PetriNetUnfolderBase]: 2246/3519 cut-off events. [2024-06-20 15:41:07,293 INFO L125 PetriNetUnfolderBase]: For 44848/44871 co-relation queries the response was YES. [2024-06-20 15:41:07,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16700 conditions, 3519 events. 2246/3519 cut-off events. For 44848/44871 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18268 event pairs, 808 based on Foata normal form. 20/3535 useless extension candidates. Maximal degree in co-relation 16662. Up to 3265 conditions per place. [2024-06-20 15:41:07,317 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 93 selfloop transitions, 16 changer transitions 0/122 dead transitions. [2024-06-20 15:41:07,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 122 transitions, 1067 flow [2024-06-20 15:41:07,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:07,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:07,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 15:41:07,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-20 15:41:07,319 INFO L175 Difference]: Start difference. First operand has 93 places, 103 transitions, 799 flow. Second operand 8 states and 151 transitions. [2024-06-20 15:41:07,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 122 transitions, 1067 flow [2024-06-20 15:41:07,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 122 transitions, 1013 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 15:41:07,355 INFO L231 Difference]: Finished difference. Result has 95 places, 103 transitions, 785 flow [2024-06-20 15:41:07,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=785, PETRI_PLACES=95, PETRI_TRANSITIONS=103} [2024-06-20 15:41:07,356 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 50 predicate places. [2024-06-20 15:41:07,356 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 103 transitions, 785 flow [2024-06-20 15:41:07,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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 15:41:07,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:07,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:07,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:41:07,358 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 15:41:07,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:07,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1870536227, now seen corresponding path program 4 times [2024-06-20 15:41:07,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:07,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118022405] [2024-06-20 15:41:07,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:07,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:08,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:08,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118022405] [2024-06-20 15:41:08,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118022405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:08,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:08,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:41:08,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841351930] [2024-06-20 15:41:08,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:08,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:41:08,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:08,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:41:08,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:41:08,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:08,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 103 transitions, 785 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:08,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:08,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:08,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:09,083 INFO L124 PetriNetUnfolderBase]: 2405/3712 cut-off events. [2024-06-20 15:41:09,083 INFO L125 PetriNetUnfolderBase]: For 49413/49416 co-relation queries the response was YES. [2024-06-20 15:41:09,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17946 conditions, 3712 events. 2405/3712 cut-off events. For 49413/49416 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18914 event pairs, 794 based on Foata normal form. 4/3712 useless extension candidates. Maximal degree in co-relation 17907. Up to 3382 conditions per place. [2024-06-20 15:41:09,108 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 87 selfloop transitions, 68 changer transitions 0/160 dead transitions. [2024-06-20 15:41:09,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 160 transitions, 1451 flow [2024-06-20 15:41:09,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:09,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:09,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-20 15:41:09,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-20 15:41:09,110 INFO L175 Difference]: Start difference. First operand has 95 places, 103 transitions, 785 flow. Second operand 8 states and 159 transitions. [2024-06-20 15:41:09,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 160 transitions, 1451 flow [2024-06-20 15:41:09,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 160 transitions, 1388 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 15:41:09,156 INFO L231 Difference]: Finished difference. Result has 99 places, 133 transitions, 1206 flow [2024-06-20 15:41:09,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1206, PETRI_PLACES=99, PETRI_TRANSITIONS=133} [2024-06-20 15:41:09,157 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 54 predicate places. [2024-06-20 15:41:09,157 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 133 transitions, 1206 flow [2024-06-20 15:41:09,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:09,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:09,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:09,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:41:09,158 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:09,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:09,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1689208518, now seen corresponding path program 1 times [2024-06-20 15:41:09,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:09,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305324804] [2024-06-20 15:41:09,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:09,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:09,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:09,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305324804] [2024-06-20 15:41:09,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305324804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:09,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:09,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:41:09,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633347357] [2024-06-20 15:41:09,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:09,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:41:09,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:09,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:41:09,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:41:09,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 15:41:09,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 133 transitions, 1206 flow. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 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 15:41:09,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:09,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 15:41:09,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:10,678 INFO L124 PetriNetUnfolderBase]: 2751/4265 cut-off events. [2024-06-20 15:41:10,678 INFO L125 PetriNetUnfolderBase]: For 72060/72060 co-relation queries the response was YES. [2024-06-20 15:41:10,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21677 conditions, 4265 events. 2751/4265 cut-off events. For 72060/72060 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 22178 event pairs, 1126 based on Foata normal form. 1/4253 useless extension candidates. Maximal degree in co-relation 21634. Up to 4027 conditions per place. [2024-06-20 15:41:10,702 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 96 selfloop transitions, 9 changer transitions 0/143 dead transitions. [2024-06-20 15:41:10,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 143 transitions, 1460 flow [2024-06-20 15:41:10,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:41:10,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:41:10,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-20 15:41:10,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-20 15:41:10,705 INFO L175 Difference]: Start difference. First operand has 99 places, 133 transitions, 1206 flow. Second operand 5 states and 98 transitions. [2024-06-20 15:41:10,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 143 transitions, 1460 flow [2024-06-20 15:41:10,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 143 transitions, 1356 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 15:41:10,767 INFO L231 Difference]: Finished difference. Result has 100 places, 136 transitions, 1156 flow [2024-06-20 15:41:10,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1102, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1156, PETRI_PLACES=100, PETRI_TRANSITIONS=136} [2024-06-20 15:41:10,768 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 55 predicate places. [2024-06-20 15:41:10,768 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 136 transitions, 1156 flow [2024-06-20 15:41:10,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 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 15:41:10,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:10,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:10,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:41:10,769 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 15:41:10,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:10,769 INFO L85 PathProgramCache]: Analyzing trace with hash 266430616, now seen corresponding path program 1 times [2024-06-20 15:41:10,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:10,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510994592] [2024-06-20 15:41:10,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:10,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:11,784 INFO 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 15:41:11,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:11,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510994592] [2024-06-20 15:41:11,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510994592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:11,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:11,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:11,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776192005] [2024-06-20 15:41:11,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:11,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:11,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:11,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:11,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:11,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:11,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 136 transitions, 1156 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:11,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:11,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:11,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:12,527 INFO L124 PetriNetUnfolderBase]: 2553/3919 cut-off events. [2024-06-20 15:41:12,527 INFO L125 PetriNetUnfolderBase]: For 68791/68800 co-relation queries the response was YES. [2024-06-20 15:41:12,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20742 conditions, 3919 events. 2553/3919 cut-off events. For 68791/68800 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 20013 event pairs, 863 based on Foata normal form. 6/3909 useless extension candidates. Maximal degree in co-relation 20698. Up to 3540 conditions per place. [2024-06-20 15:41:12,553 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 104 selfloop transitions, 62 changer transitions 0/172 dead transitions. [2024-06-20 15:41:12,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 172 transitions, 1733 flow [2024-06-20 15:41:12,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:12,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:12,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 15:41:12,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-20 15:41:12,557 INFO L175 Difference]: Start difference. First operand has 100 places, 136 transitions, 1156 flow. Second operand 9 states and 169 transitions. [2024-06-20 15:41:12,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 172 transitions, 1733 flow [2024-06-20 15:41:12,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 172 transitions, 1701 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 15:41:12,611 INFO L231 Difference]: Finished difference. Result has 108 places, 146 transitions, 1399 flow [2024-06-20 15:41:12,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1399, PETRI_PLACES=108, PETRI_TRANSITIONS=146} [2024-06-20 15:41:12,611 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2024-06-20 15:41:12,611 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 146 transitions, 1399 flow [2024-06-20 15:41:12,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:12,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:12,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:12,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:41:12,612 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 15:41:12,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:12,612 INFO L85 PathProgramCache]: Analyzing trace with hash 266580563, now seen corresponding path program 1 times [2024-06-20 15:41:12,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:12,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229545655] [2024-06-20 15:41:12,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:12,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:13,702 INFO 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 15:41:13,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:13,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229545655] [2024-06-20 15:41:13,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229545655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:13,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:13,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:13,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644350407] [2024-06-20 15:41:13,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:13,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:13,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:13,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:13,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:13,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:13,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 146 transitions, 1399 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:13,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:13,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:13,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:14,435 INFO L124 PetriNetUnfolderBase]: 2631/4038 cut-off events. [2024-06-20 15:41:14,435 INFO L125 PetriNetUnfolderBase]: For 79125/79134 co-relation queries the response was YES. [2024-06-20 15:41:14,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22363 conditions, 4038 events. 2631/4038 cut-off events. For 79125/79134 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 20693 event pairs, 854 based on Foata normal form. 6/4024 useless extension candidates. Maximal degree in co-relation 22316. Up to 3547 conditions per place. [2024-06-20 15:41:14,467 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 117 selfloop transitions, 62 changer transitions 0/185 dead transitions. [2024-06-20 15:41:14,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 185 transitions, 2020 flow [2024-06-20 15:41:14,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:14,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:14,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 15:41:14,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-20 15:41:14,470 INFO L175 Difference]: Start difference. First operand has 108 places, 146 transitions, 1399 flow. Second operand 9 states and 173 transitions. [2024-06-20 15:41:14,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 185 transitions, 2020 flow [2024-06-20 15:41:14,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 185 transitions, 1969 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-20 15:41:14,540 INFO L231 Difference]: Finished difference. Result has 115 places, 155 transitions, 1608 flow [2024-06-20 15:41:14,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1608, PETRI_PLACES=115, PETRI_TRANSITIONS=155} [2024-06-20 15:41:14,541 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-20 15:41:14,541 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 155 transitions, 1608 flow [2024-06-20 15:41:14,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:14,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:14,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:14,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:41:14,542 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 15:41:14,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:14,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1419557096, now seen corresponding path program 2 times [2024-06-20 15:41:14,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:14,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643126803] [2024-06-20 15:41:14,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:14,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:15,598 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 15:41:15,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:15,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643126803] [2024-06-20 15:41:15,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643126803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:15,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:15,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:15,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656583891] [2024-06-20 15:41:15,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:15,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:15,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:15,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:15,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:15,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:15,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 155 transitions, 1608 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:15,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:15,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:15,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:16,381 INFO L124 PetriNetUnfolderBase]: 2684/4112 cut-off events. [2024-06-20 15:41:16,381 INFO L125 PetriNetUnfolderBase]: For 88617/88628 co-relation queries the response was YES. [2024-06-20 15:41:16,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23846 conditions, 4112 events. 2684/4112 cut-off events. For 88617/88628 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 21047 event pairs, 845 based on Foata normal form. 14/4112 useless extension candidates. Maximal degree in co-relation 23796. Up to 3621 conditions per place. [2024-06-20 15:41:16,406 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 112 selfloop transitions, 83 changer transitions 0/201 dead transitions. [2024-06-20 15:41:16,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 201 transitions, 2431 flow [2024-06-20 15:41:16,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:16,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:16,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-20 15:41:16,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-20 15:41:16,408 INFO L175 Difference]: Start difference. First operand has 115 places, 155 transitions, 1608 flow. Second operand 8 states and 164 transitions. [2024-06-20 15:41:16,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 201 transitions, 2431 flow [2024-06-20 15:41:16,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 201 transitions, 2380 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-20 15:41:16,475 INFO L231 Difference]: Finished difference. Result has 120 places, 167 transitions, 1910 flow [2024-06-20 15:41:16,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1910, PETRI_PLACES=120, PETRI_TRANSITIONS=167} [2024-06-20 15:41:16,476 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 75 predicate places. [2024-06-20 15:41:16,476 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 167 transitions, 1910 flow [2024-06-20 15:41:16,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:16,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:16,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:16,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:41:16,477 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 15:41:16,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:16,477 INFO L85 PathProgramCache]: Analyzing trace with hash 272144536, now seen corresponding path program 3 times [2024-06-20 15:41:16,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:16,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968580455] [2024-06-20 15:41:16,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:16,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:17,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:17,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968580455] [2024-06-20 15:41:17,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968580455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:17,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:17,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:17,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402869443] [2024-06-20 15:41:17,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:17,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:17,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:17,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:17,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:17,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:17,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 167 transitions, 1910 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:17,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:17,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:17,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:18,234 INFO L124 PetriNetUnfolderBase]: 2690/4124 cut-off events. [2024-06-20 15:41:18,234 INFO L125 PetriNetUnfolderBase]: For 98162/98165 co-relation queries the response was YES. [2024-06-20 15:41:18,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24840 conditions, 4124 events. 2690/4124 cut-off events. For 98162/98165 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 21076 event pairs, 856 based on Foata normal form. 6/4116 useless extension candidates. Maximal degree in co-relation 24788. Up to 3628 conditions per place. [2024-06-20 15:41:18,265 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 109 selfloop transitions, 86 changer transitions 0/201 dead transitions. [2024-06-20 15:41:18,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 201 transitions, 2603 flow [2024-06-20 15:41:18,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:18,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:18,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-20 15:41:18,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-20 15:41:18,266 INFO L175 Difference]: Start difference. First operand has 120 places, 167 transitions, 1910 flow. Second operand 8 states and 162 transitions. [2024-06-20 15:41:18,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 201 transitions, 2603 flow [2024-06-20 15:41:18,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 201 transitions, 2502 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-20 15:41:18,358 INFO L231 Difference]: Finished difference. Result has 125 places, 170 transitions, 2036 flow [2024-06-20 15:41:18,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1809, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2036, PETRI_PLACES=125, PETRI_TRANSITIONS=170} [2024-06-20 15:41:18,358 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2024-06-20 15:41:18,358 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 170 transitions, 2036 flow [2024-06-20 15:41:18,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:18,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:18,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:18,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:41:18,359 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 15:41:18,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:18,359 INFO L85 PathProgramCache]: Analyzing trace with hash 272144753, now seen corresponding path program 2 times [2024-06-20 15:41:18,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:18,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467577068] [2024-06-20 15:41:18,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:18,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:19,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:19,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467577068] [2024-06-20 15:41:19,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467577068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:19,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:19,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:19,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686486329] [2024-06-20 15:41:19,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:19,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:19,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:19,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:19,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:19,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:19,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 170 transitions, 2036 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:19,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:19,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:19,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:20,099 INFO L124 PetriNetUnfolderBase]: 2744/4200 cut-off events. [2024-06-20 15:41:20,099 INFO L125 PetriNetUnfolderBase]: For 107482/107485 co-relation queries the response was YES. [2024-06-20 15:41:20,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25775 conditions, 4200 events. 2744/4200 cut-off events. For 107482/107485 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 21500 event pairs, 869 based on Foata normal form. 4/4189 useless extension candidates. Maximal degree in co-relation 25721. Up to 3672 conditions per place. [2024-06-20 15:41:20,131 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 137 selfloop transitions, 66 changer transitions 0/209 dead transitions. [2024-06-20 15:41:20,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 209 transitions, 2796 flow [2024-06-20 15:41:20,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:20,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:20,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-20 15:41:20,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-20 15:41:20,133 INFO L175 Difference]: Start difference. First operand has 125 places, 170 transitions, 2036 flow. Second operand 9 states and 177 transitions. [2024-06-20 15:41:20,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 209 transitions, 2796 flow [2024-06-20 15:41:20,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 209 transitions, 2620 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 15:41:20,239 INFO L231 Difference]: Finished difference. Result has 129 places, 176 transitions, 2078 flow [2024-06-20 15:41:20,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1860, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2078, PETRI_PLACES=129, PETRI_TRANSITIONS=176} [2024-06-20 15:41:20,240 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 84 predicate places. [2024-06-20 15:41:20,240 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 176 transitions, 2078 flow [2024-06-20 15:41:20,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:20,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:20,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:20,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:41:20,241 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 15:41:20,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:20,241 INFO L85 PathProgramCache]: Analyzing trace with hash 272152193, now seen corresponding path program 3 times [2024-06-20 15:41:20,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:20,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843395969] [2024-06-20 15:41:20,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:20,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:21,273 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 15:41:21,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:21,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843395969] [2024-06-20 15:41:21,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843395969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:21,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:21,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:21,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108135442] [2024-06-20 15:41:21,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:21,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:21,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:21,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:21,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:21,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:21,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 176 transitions, 2078 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:21,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:21,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:21,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:22,094 INFO L124 PetriNetUnfolderBase]: 2734/4187 cut-off events. [2024-06-20 15:41:22,094 INFO L125 PetriNetUnfolderBase]: For 114749/114752 co-relation queries the response was YES. [2024-06-20 15:41:22,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25923 conditions, 4187 events. 2734/4187 cut-off events. For 114749/114752 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 21456 event pairs, 872 based on Foata normal form. 4/4176 useless extension candidates. Maximal degree in co-relation 25868. Up to 3664 conditions per place. [2024-06-20 15:41:22,130 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 128 selfloop transitions, 70 changer transitions 0/204 dead transitions. [2024-06-20 15:41:22,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 204 transitions, 2652 flow [2024-06-20 15:41:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:22,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:22,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 15:41:22,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-20 15:41:22,131 INFO L175 Difference]: Start difference. First operand has 129 places, 176 transitions, 2078 flow. Second operand 9 states and 173 transitions. [2024-06-20 15:41:22,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 204 transitions, 2652 flow [2024-06-20 15:41:22,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 204 transitions, 2542 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-20 15:41:22,254 INFO L231 Difference]: Finished difference. Result has 134 places, 176 transitions, 2116 flow [2024-06-20 15:41:22,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1968, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2116, PETRI_PLACES=134, PETRI_TRANSITIONS=176} [2024-06-20 15:41:22,255 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 89 predicate places. [2024-06-20 15:41:22,255 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 176 transitions, 2116 flow [2024-06-20 15:41:22,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:22,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:22,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:22,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:41:22,255 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 15:41:22,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:22,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1659725959, now seen corresponding path program 4 times [2024-06-20 15:41:22,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:22,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059778395] [2024-06-20 15:41:22,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:22,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:23,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:23,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059778395] [2024-06-20 15:41:23,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059778395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:23,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:23,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:23,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754858062] [2024-06-20 15:41:23,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:23,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:23,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:23,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:23,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:23,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:23,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 176 transitions, 2116 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:23,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:23,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:23,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:23,978 INFO L124 PetriNetUnfolderBase]: 2788/4268 cut-off events. [2024-06-20 15:41:23,978 INFO L125 PetriNetUnfolderBase]: For 125715/125715 co-relation queries the response was YES. [2024-06-20 15:41:23,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26796 conditions, 4268 events. 2788/4268 cut-off events. For 125715/125715 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 21896 event pairs, 909 based on Foata normal form. 4/4259 useless extension candidates. Maximal degree in co-relation 26740. Up to 3885 conditions per place. [2024-06-20 15:41:24,012 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 171 selfloop transitions, 35 changer transitions 0/212 dead transitions. [2024-06-20 15:41:24,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 212 transitions, 2902 flow [2024-06-20 15:41:24,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:24,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:24,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-20 15:41:24,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-20 15:41:24,014 INFO L175 Difference]: Start difference. First operand has 134 places, 176 transitions, 2116 flow. Second operand 8 states and 160 transitions. [2024-06-20 15:41:24,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 212 transitions, 2902 flow [2024-06-20 15:41:24,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 212 transitions, 2783 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 15:41:24,156 INFO L231 Difference]: Finished difference. Result has 136 places, 182 transitions, 2169 flow [2024-06-20 15:41:24,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2003, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2169, PETRI_PLACES=136, PETRI_TRANSITIONS=182} [2024-06-20 15:41:24,156 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 91 predicate places. [2024-06-20 15:41:24,157 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 182 transitions, 2169 flow [2024-06-20 15:41:24,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:24,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:24,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:24,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:41:24,157 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 15:41:24,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:24,158 INFO L85 PathProgramCache]: Analyzing trace with hash -996353896, now seen corresponding path program 4 times [2024-06-20 15:41:24,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:24,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036537249] [2024-06-20 15:41:24,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:24,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:25,045 INFO 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 15:41:25,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:25,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036537249] [2024-06-20 15:41:25,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036537249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:25,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:25,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:25,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202757579] [2024-06-20 15:41:25,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:25,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:25,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:25,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:25,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:25,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:25,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 182 transitions, 2169 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:25,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:25,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:25,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:25,917 INFO L124 PetriNetUnfolderBase]: 2783/4260 cut-off events. [2024-06-20 15:41:25,918 INFO L125 PetriNetUnfolderBase]: For 133554/133554 co-relation queries the response was YES. [2024-06-20 15:41:25,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26958 conditions, 4260 events. 2783/4260 cut-off events. For 133554/133554 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 21874 event pairs, 911 based on Foata normal form. 2/4249 useless extension candidates. Maximal degree in co-relation 26901. Up to 3993 conditions per place. [2024-06-20 15:41:25,953 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 175 selfloop transitions, 23 changer transitions 0/204 dead transitions. [2024-06-20 15:41:25,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 204 transitions, 2635 flow [2024-06-20 15:41:25,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:25,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:25,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 15:41:25,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-20 15:41:25,954 INFO L175 Difference]: Start difference. First operand has 136 places, 182 transitions, 2169 flow. Second operand 8 states and 149 transitions. [2024-06-20 15:41:25,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 204 transitions, 2635 flow [2024-06-20 15:41:26,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 204 transitions, 2484 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 15:41:26,090 INFO L231 Difference]: Finished difference. Result has 138 places, 182 transitions, 2073 flow [2024-06-20 15:41:26,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2018, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2073, PETRI_PLACES=138, PETRI_TRANSITIONS=182} [2024-06-20 15:41:26,090 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 93 predicate places. [2024-06-20 15:41:26,090 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 182 transitions, 2073 flow [2024-06-20 15:41:26,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:26,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:26,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:26,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:41:26,091 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 15:41:26,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:26,091 INFO L85 PathProgramCache]: Analyzing trace with hash -996353679, now seen corresponding path program 5 times [2024-06-20 15:41:26,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:26,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822966043] [2024-06-20 15:41:26,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:26,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:27,140 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 15:41:27,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:27,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822966043] [2024-06-20 15:41:27,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822966043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:27,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:27,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:27,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140276156] [2024-06-20 15:41:27,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:27,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:27,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:27,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:27,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:27,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:27,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 182 transitions, 2073 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:27,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:27,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:27,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:28,036 INFO L124 PetriNetUnfolderBase]: 2773/4246 cut-off events. [2024-06-20 15:41:28,036 INFO L125 PetriNetUnfolderBase]: For 140216/140216 co-relation queries the response was YES. [2024-06-20 15:41:28,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26978 conditions, 4246 events. 2773/4246 cut-off events. For 140216/140216 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 21811 event pairs, 897 based on Foata normal form. 4/4237 useless extension candidates. Maximal degree in co-relation 26920. Up to 3870 conditions per place. [2024-06-20 15:41:28,068 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 169 selfloop transitions, 36 changer transitions 0/211 dead transitions. [2024-06-20 15:41:28,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 211 transitions, 2679 flow [2024-06-20 15:41:28,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:28,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:28,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 15:41:28,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-20 15:41:28,070 INFO L175 Difference]: Start difference. First operand has 138 places, 182 transitions, 2073 flow. Second operand 9 states and 168 transitions. [2024-06-20 15:41:28,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 211 transitions, 2679 flow [2024-06-20 15:41:28,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 211 transitions, 2533 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-20 15:41:28,261 INFO L231 Difference]: Finished difference. Result has 138 places, 182 transitions, 2008 flow [2024-06-20 15:41:28,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1927, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2008, PETRI_PLACES=138, PETRI_TRANSITIONS=182} [2024-06-20 15:41:28,262 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 93 predicate places. [2024-06-20 15:41:28,262 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 182 transitions, 2008 flow [2024-06-20 15:41:28,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:28,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:28,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:28,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:41:28,263 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:28,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:28,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2008362357, now seen corresponding path program 6 times [2024-06-20 15:41:28,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:28,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411210654] [2024-06-20 15:41:28,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:28,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:29,194 INFO 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 15:41:29,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:29,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411210654] [2024-06-20 15:41:29,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411210654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:29,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:29,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:29,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840068060] [2024-06-20 15:41:29,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:29,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:29,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:29,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:29,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:29,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:29,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 182 transitions, 2008 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:29,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:29,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:29,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:30,042 INFO L124 PetriNetUnfolderBase]: 2763/4232 cut-off events. [2024-06-20 15:41:30,042 INFO L125 PetriNetUnfolderBase]: For 147672/147672 co-relation queries the response was YES. [2024-06-20 15:41:30,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27137 conditions, 4232 events. 2763/4232 cut-off events. For 147672/147672 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 21684 event pairs, 905 based on Foata normal form. 4/4223 useless extension candidates. Maximal degree in co-relation 27079. Up to 3952 conditions per place. [2024-06-20 15:41:30,069 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 181 selfloop transitions, 19 changer transitions 0/206 dead transitions. [2024-06-20 15:41:30,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 206 transitions, 2482 flow [2024-06-20 15:41:30,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:30,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:30,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 15:41:30,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-20 15:41:30,070 INFO L175 Difference]: Start difference. First operand has 138 places, 182 transitions, 2008 flow. Second operand 9 states and 162 transitions. [2024-06-20 15:41:30,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 206 transitions, 2482 flow [2024-06-20 15:41:30,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 206 transitions, 2400 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 15:41:30,209 INFO L231 Difference]: Finished difference. Result has 140 places, 182 transitions, 1972 flow [2024-06-20 15:41:30,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1926, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1972, PETRI_PLACES=140, PETRI_TRANSITIONS=182} [2024-06-20 15:41:30,210 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-20 15:41:30,210 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 182 transitions, 1972 flow [2024-06-20 15:41:30,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:30,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:30,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:30,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:41:30,211 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 15:41:30,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:30,211 INFO L85 PathProgramCache]: Analyzing trace with hash 112510756, now seen corresponding path program 5 times [2024-06-20 15:41:30,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:30,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780933759] [2024-06-20 15:41:30,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:30,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:30,939 INFO 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 15:41:30,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:30,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780933759] [2024-06-20 15:41:30,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780933759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:30,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:30,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:30,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642257744] [2024-06-20 15:41:30,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:30,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:30,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:30,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:30,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:31,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:31,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 182 transitions, 1972 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:31,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:31,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:31,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:31,973 INFO L124 PetriNetUnfolderBase]: 2974/4551 cut-off events. [2024-06-20 15:41:31,973 INFO L125 PetriNetUnfolderBase]: For 158293/158307 co-relation queries the response was YES. [2024-06-20 15:41:31,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29184 conditions, 4551 events. 2974/4551 cut-off events. For 158293/158307 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 23529 event pairs, 862 based on Foata normal form. 14/4551 useless extension candidates. Maximal degree in co-relation 29125. Up to 3923 conditions per place. [2024-06-20 15:41:32,005 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 137 selfloop transitions, 153 changer transitions 0/296 dead transitions. [2024-06-20 15:41:32,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 296 transitions, 3634 flow [2024-06-20 15:41:32,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:32,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:32,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-20 15:41:32,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-20 15:41:32,007 INFO L175 Difference]: Start difference. First operand has 140 places, 182 transitions, 1972 flow. Second operand 9 states and 185 transitions. [2024-06-20 15:41:32,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 296 transitions, 3634 flow [2024-06-20 15:41:32,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 296 transitions, 3556 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-20 15:41:32,139 INFO L231 Difference]: Finished difference. Result has 143 places, 257 transitions, 3087 flow [2024-06-20 15:41:32,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1900, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3087, PETRI_PLACES=143, PETRI_TRANSITIONS=257} [2024-06-20 15:41:32,140 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 98 predicate places. [2024-06-20 15:41:32,140 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 257 transitions, 3087 flow [2024-06-20 15:41:32,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:32,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:32,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:32,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:41:32,141 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 15:41:32,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:32,141 INFO L85 PathProgramCache]: Analyzing trace with hash 877941050, now seen corresponding path program 6 times [2024-06-20 15:41:32,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:32,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071657687] [2024-06-20 15:41:32,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:32,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:32,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:32,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071657687] [2024-06-20 15:41:32,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071657687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:32,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:32,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:32,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421690132] [2024-06-20 15:41:32,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:32,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:32,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:32,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:32,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:33,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:33,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 257 transitions, 3087 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:33,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:33,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:33,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:33,973 INFO L124 PetriNetUnfolderBase]: 3053/4668 cut-off events. [2024-06-20 15:41:33,973 INFO L125 PetriNetUnfolderBase]: For 170027/170032 co-relation queries the response was YES. [2024-06-20 15:41:33,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31212 conditions, 4668 events. 3053/4668 cut-off events. For 170027/170032 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 24249 event pairs, 894 based on Foata normal form. 7/4661 useless extension candidates. Maximal degree in co-relation 31149. Up to 3996 conditions per place. [2024-06-20 15:41:34,010 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 136 selfloop transitions, 190 changer transitions 0/332 dead transitions. [2024-06-20 15:41:34,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 332 transitions, 4512 flow [2024-06-20 15:41:34,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:34,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:34,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-20 15:41:34,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-20 15:41:34,012 INFO L175 Difference]: Start difference. First operand has 143 places, 257 transitions, 3087 flow. Second operand 9 states and 183 transitions. [2024-06-20 15:41:34,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 332 transitions, 4512 flow [2024-06-20 15:41:34,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 332 transitions, 4245 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-20 15:41:34,191 INFO L231 Difference]: Finished difference. Result has 152 places, 298 transitions, 3948 flow [2024-06-20 15:41:34,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2879, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3948, PETRI_PLACES=152, PETRI_TRANSITIONS=298} [2024-06-20 15:41:34,192 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 107 predicate places. [2024-06-20 15:41:34,192 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 298 transitions, 3948 flow [2024-06-20 15:41:34,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:34,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:34,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:34,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:41:34,193 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 15:41:34,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:34,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1378700930, now seen corresponding path program 7 times [2024-06-20 15:41:34,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:34,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837230491] [2024-06-20 15:41:34,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:34,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:34,908 INFO 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 15:41:34,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:34,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837230491] [2024-06-20 15:41:34,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837230491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:34,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:34,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:34,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056691374] [2024-06-20 15:41:34,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:34,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:34,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:34,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:34,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:34,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:34,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 298 transitions, 3948 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:34,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:34,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:34,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:35,986 INFO L124 PetriNetUnfolderBase]: 3090/4722 cut-off events. [2024-06-20 15:41:35,987 INFO L125 PetriNetUnfolderBase]: For 179072/179082 co-relation queries the response was YES. [2024-06-20 15:41:36,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32148 conditions, 4722 events. 3090/4722 cut-off events. For 179072/179082 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 24495 event pairs, 867 based on Foata normal form. 10/4718 useless extension candidates. Maximal degree in co-relation 32080. Up to 4036 conditions per place. [2024-06-20 15:41:36,021 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 124 selfloop transitions, 222 changer transitions 0/352 dead transitions. [2024-06-20 15:41:36,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 352 transitions, 5020 flow [2024-06-20 15:41:36,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:36,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:36,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-20 15:41:36,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-20 15:41:36,022 INFO L175 Difference]: Start difference. First operand has 152 places, 298 transitions, 3948 flow. Second operand 9 states and 181 transitions. [2024-06-20 15:41:36,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 352 transitions, 5020 flow [2024-06-20 15:41:36,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 352 transitions, 4758 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-20 15:41:36,246 INFO L231 Difference]: Finished difference. Result has 160 places, 320 transitions, 4577 flow [2024-06-20 15:41:36,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3727, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4577, PETRI_PLACES=160, PETRI_TRANSITIONS=320} [2024-06-20 15:41:36,247 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 115 predicate places. [2024-06-20 15:41:36,247 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 320 transitions, 4577 flow [2024-06-20 15:41:36,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:36,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:36,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:36,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:41:36,248 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 15:41:36,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:36,248 INFO L85 PathProgramCache]: Analyzing trace with hash 153282173, now seen corresponding path program 7 times [2024-06-20 15:41:36,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:36,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33194113] [2024-06-20 15:41:36,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:36,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:37,045 INFO 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 15:41:37,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:37,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33194113] [2024-06-20 15:41:37,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33194113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:37,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:37,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:37,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716267855] [2024-06-20 15:41:37,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:37,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:37,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:37,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:37,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:37,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:37,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 320 transitions, 4577 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:37,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:37,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:37,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:38,249 INFO L124 PetriNetUnfolderBase]: 3237/4954 cut-off events. [2024-06-20 15:41:38,249 INFO L125 PetriNetUnfolderBase]: For 195252/195260 co-relation queries the response was YES. [2024-06-20 15:41:38,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34109 conditions, 4954 events. 3237/4954 cut-off events. For 195252/195260 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 26084 event pairs, 855 based on Foata normal form. 8/4947 useless extension candidates. Maximal degree in co-relation 34038. Up to 4252 conditions per place. [2024-06-20 15:41:38,292 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 270 selfloop transitions, 136 changer transitions 0/412 dead transitions. [2024-06-20 15:41:38,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 412 transitions, 6208 flow [2024-06-20 15:41:38,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:38,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:38,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-20 15:41:38,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-20 15:41:38,294 INFO L175 Difference]: Start difference. First operand has 160 places, 320 transitions, 4577 flow. Second operand 9 states and 186 transitions. [2024-06-20 15:41:38,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 412 transitions, 6208 flow [2024-06-20 15:41:38,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 412 transitions, 5826 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 15:41:38,655 INFO L231 Difference]: Finished difference. Result has 167 places, 377 transitions, 5205 flow [2024-06-20 15:41:38,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4205, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5205, PETRI_PLACES=167, PETRI_TRANSITIONS=377} [2024-06-20 15:41:38,656 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 122 predicate places. [2024-06-20 15:41:38,656 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 377 transitions, 5205 flow [2024-06-20 15:41:38,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:38,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:38,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:38,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:41:38,657 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 15:41:38,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:38,657 INFO L85 PathProgramCache]: Analyzing trace with hash 883453377, now seen corresponding path program 8 times [2024-06-20 15:41:38,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:38,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937368172] [2024-06-20 15:41:38,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:38,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:39,461 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 15:41:39,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:39,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937368172] [2024-06-20 15:41:39,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937368172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:39,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:39,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:39,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531161437] [2024-06-20 15:41:39,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:39,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:39,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:39,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:39,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:39,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:39,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 377 transitions, 5205 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:39,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:39,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:39,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:40,749 INFO L124 PetriNetUnfolderBase]: 3429/5256 cut-off events. [2024-06-20 15:41:40,750 INFO L125 PetriNetUnfolderBase]: For 214315/214323 co-relation queries the response was YES. [2024-06-20 15:41:40,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37501 conditions, 5256 events. 3429/5256 cut-off events. For 214315/214323 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 28121 event pairs, 889 based on Foata normal form. 10/5251 useless extension candidates. Maximal degree in co-relation 37425. Up to 4392 conditions per place. [2024-06-20 15:41:40,802 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 276 selfloop transitions, 195 changer transitions 0/477 dead transitions. [2024-06-20 15:41:40,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 477 transitions, 7181 flow [2024-06-20 15:41:40,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:40,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:40,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-20 15:41:40,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-20 15:41:40,804 INFO L175 Difference]: Start difference. First operand has 167 places, 377 transitions, 5205 flow. Second operand 9 states and 186 transitions. [2024-06-20 15:41:40,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 477 transitions, 7181 flow [2024-06-20 15:41:41,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 477 transitions, 6979 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-20 15:41:41,194 INFO L231 Difference]: Finished difference. Result has 176 places, 441 transitions, 6418 flow [2024-06-20 15:41:41,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5058, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6418, PETRI_PLACES=176, PETRI_TRANSITIONS=441} [2024-06-20 15:41:41,195 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 131 predicate places. [2024-06-20 15:41:41,195 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 441 transitions, 6418 flow [2024-06-20 15:41:41,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:41,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:41,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:41,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:41:41,196 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 15:41:41,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:41,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2142920757, now seen corresponding path program 9 times [2024-06-20 15:41:41,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:41,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752326013] [2024-06-20 15:41:41,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:41,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:42,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:42,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752326013] [2024-06-20 15:41:42,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752326013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:42,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:42,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:42,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151388872] [2024-06-20 15:41:42,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:42,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:42,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:42,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:42,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:42,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:42,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 441 transitions, 6418 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:42,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:42,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:42,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:43,316 INFO L124 PetriNetUnfolderBase]: 3507/5374 cut-off events. [2024-06-20 15:41:43,317 INFO L125 PetriNetUnfolderBase]: For 231605/231614 co-relation queries the response was YES. [2024-06-20 15:41:43,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40109 conditions, 5374 events. 3507/5374 cut-off events. For 231605/231614 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 28790 event pairs, 886 based on Foata normal form. 10/5369 useless extension candidates. Maximal degree in co-relation 40029. Up to 4457 conditions per place. [2024-06-20 15:41:43,358 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 289 selfloop transitions, 211 changer transitions 0/506 dead transitions. [2024-06-20 15:41:43,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 506 transitions, 8146 flow [2024-06-20 15:41:43,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:43,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:43,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-20 15:41:43,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-20 15:41:43,360 INFO L175 Difference]: Start difference. First operand has 176 places, 441 transitions, 6418 flow. Second operand 9 states and 187 transitions. [2024-06-20 15:41:43,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 506 transitions, 8146 flow [2024-06-20 15:41:43,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 506 transitions, 7966 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-20 15:41:43,759 INFO L231 Difference]: Finished difference. Result has 182 places, 464 transitions, 7099 flow [2024-06-20 15:41:43,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6244, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7099, PETRI_PLACES=182, PETRI_TRANSITIONS=464} [2024-06-20 15:41:43,760 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 137 predicate places. [2024-06-20 15:41:43,760 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 464 transitions, 7099 flow [2024-06-20 15:41:43,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:43,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:43,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:43,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:41:43,760 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 15:41:43,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:43,761 INFO L85 PathProgramCache]: Analyzing trace with hash 883662627, now seen corresponding path program 10 times [2024-06-20 15:41:43,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:43,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620561988] [2024-06-20 15:41:43,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:43,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:44,612 INFO 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 15:41:44,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:44,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620561988] [2024-06-20 15:41:44,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620561988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:44,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:44,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:44,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694411106] [2024-06-20 15:41:44,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:44,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:44,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:44,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:44,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:44,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:44,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 464 transitions, 7099 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:44,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:44,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:44,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:46,057 INFO L124 PetriNetUnfolderBase]: 3491/5351 cut-off events. [2024-06-20 15:41:46,058 INFO L125 PetriNetUnfolderBase]: For 241827/241836 co-relation queries the response was YES. [2024-06-20 15:41:46,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40747 conditions, 5351 events. 3491/5351 cut-off events. For 241827/241836 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 28661 event pairs, 883 based on Foata normal form. 10/5346 useless extension candidates. Maximal degree in co-relation 40665. Up to 4444 conditions per place. [2024-06-20 15:41:46,111 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 277 selfloop transitions, 217 changer transitions 0/500 dead transitions. [2024-06-20 15:41:46,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 500 transitions, 8281 flow [2024-06-20 15:41:46,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:46,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:46,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-20 15:41:46,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-20 15:41:46,113 INFO L175 Difference]: Start difference. First operand has 182 places, 464 transitions, 7099 flow. Second operand 9 states and 183 transitions. [2024-06-20 15:41:46,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 500 transitions, 8281 flow [2024-06-20 15:41:46,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 500 transitions, 7913 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-06-20 15:41:46,603 INFO L231 Difference]: Finished difference. Result has 187 places, 464 transitions, 7186 flow [2024-06-20 15:41:46,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6731, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7186, PETRI_PLACES=187, PETRI_TRANSITIONS=464} [2024-06-20 15:41:46,604 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 142 predicate places. [2024-06-20 15:41:46,604 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 464 transitions, 7186 flow [2024-06-20 15:41:46,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:46,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:46,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:46,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:41:46,605 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 15:41:46,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:46,605 INFO L85 PathProgramCache]: Analyzing trace with hash -2013375558, now seen corresponding path program 1 times [2024-06-20 15:41:46,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:46,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885912182] [2024-06-20 15:41:46,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:46,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:47,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:47,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885912182] [2024-06-20 15:41:47,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885912182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:47,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:47,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:47,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091967636] [2024-06-20 15:41:47,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:47,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:47,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:47,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:47,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:47,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:47,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 464 transitions, 7186 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:47,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:47,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:47,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:49,151 INFO L124 PetriNetUnfolderBase]: 3928/5967 cut-off events. [2024-06-20 15:41:49,151 INFO L125 PetriNetUnfolderBase]: For 293011/293072 co-relation queries the response was YES. [2024-06-20 15:41:49,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44647 conditions, 5967 events. 3928/5967 cut-off events. For 293011/293072 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 31523 event pairs, 1221 based on Foata normal form. 37/5957 useless extension candidates. Maximal degree in co-relation 44564. Up to 5403 conditions per place. [2024-06-20 15:41:49,214 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 397 selfloop transitions, 19 changer transitions 0/492 dead transitions. [2024-06-20 15:41:49,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 492 transitions, 8198 flow [2024-06-20 15:41:49,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:49,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 15:41:49,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-20 15:41:49,216 INFO L175 Difference]: Start difference. First operand has 187 places, 464 transitions, 7186 flow. Second operand 8 states and 150 transitions. [2024-06-20 15:41:49,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 492 transitions, 8198 flow [2024-06-20 15:41:49,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 492 transitions, 7787 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 15:41:49,880 INFO L231 Difference]: Finished difference. Result has 189 places, 469 transitions, 6902 flow [2024-06-20 15:41:49,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6779, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6902, PETRI_PLACES=189, PETRI_TRANSITIONS=469} [2024-06-20 15:41:49,880 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 144 predicate places. [2024-06-20 15:41:49,881 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 469 transitions, 6902 flow [2024-06-20 15:41:49,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:49,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:49,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:49,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:41:49,881 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:49,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:49,882 INFO L85 PathProgramCache]: Analyzing trace with hash -778487789, now seen corresponding path program 1 times [2024-06-20 15:41:49,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:49,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924643321] [2024-06-20 15:41:49,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:49,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:50,625 INFO 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 15:41:50,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:50,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924643321] [2024-06-20 15:41:50,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924643321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:50,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:50,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:41:50,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756807665] [2024-06-20 15:41:50,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:50,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:41:50,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:50,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:41:50,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:41:50,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 15:41:50,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 469 transitions, 6902 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:50,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:50,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 15:41:50,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:51,873 INFO L124 PetriNetUnfolderBase]: 3684/5729 cut-off events. [2024-06-20 15:41:51,874 INFO L125 PetriNetUnfolderBase]: For 306966/307094 co-relation queries the response was YES. [2024-06-20 15:41:51,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43032 conditions, 5729 events. 3684/5729 cut-off events. For 306966/307094 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 31362 event pairs, 1230 based on Foata normal form. 68/5753 useless extension candidates. Maximal degree in co-relation 42947. Up to 5052 conditions per place. [2024-06-20 15:41:51,932 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 293 selfloop transitions, 12 changer transitions 0/482 dead transitions. [2024-06-20 15:41:51,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 482 transitions, 7576 flow [2024-06-20 15:41:51,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:41:51,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:41:51,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-20 15:41:51,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356060606060606 [2024-06-20 15:41:51,933 INFO L175 Difference]: Start difference. First operand has 189 places, 469 transitions, 6902 flow. Second operand 6 states and 115 transitions. [2024-06-20 15:41:51,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 482 transitions, 7576 flow [2024-06-20 15:41:52,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 482 transitions, 7505 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 15:41:52,397 INFO L231 Difference]: Finished difference. Result has 190 places, 472 transitions, 6897 flow [2024-06-20 15:41:52,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6831, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6897, PETRI_PLACES=190, PETRI_TRANSITIONS=472} [2024-06-20 15:41:52,398 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 145 predicate places. [2024-06-20 15:41:52,398 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 472 transitions, 6897 flow [2024-06-20 15:41:52,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:52,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:52,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:52,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:41:52,398 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 15:41:52,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:52,399 INFO L85 PathProgramCache]: Analyzing trace with hash -330704002, now seen corresponding path program 1 times [2024-06-20 15:41:52,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:52,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849920168] [2024-06-20 15:41:52,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:52,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:53,545 INFO 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 15:41:53,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:53,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849920168] [2024-06-20 15:41:53,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849920168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:53,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:53,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:53,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547713027] [2024-06-20 15:41:53,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:53,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:53,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:53,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:53,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:53,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:53,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 472 transitions, 6897 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:53,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:53,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:53,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:54,893 INFO L124 PetriNetUnfolderBase]: 3812/5831 cut-off events. [2024-06-20 15:41:54,894 INFO L125 PetriNetUnfolderBase]: For 298737/298762 co-relation queries the response was YES. [2024-06-20 15:41:54,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44803 conditions, 5831 events. 3812/5831 cut-off events. For 298737/298762 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 31339 event pairs, 964 based on Foata normal form. 11/5834 useless extension candidates. Maximal degree in co-relation 44717. Up to 5333 conditions per place. [2024-06-20 15:41:54,950 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 437 selfloop transitions, 72 changer transitions 0/516 dead transitions. [2024-06-20 15:41:54,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 516 transitions, 8205 flow [2024-06-20 15:41:54,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:54,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:54,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-20 15:41:54,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-20 15:41:54,952 INFO L175 Difference]: Start difference. First operand has 190 places, 472 transitions, 6897 flow. Second operand 9 states and 178 transitions. [2024-06-20 15:41:54,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 516 transitions, 8205 flow [2024-06-20 15:41:55,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 516 transitions, 8161 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 15:41:55,666 INFO L231 Difference]: Finished difference. Result has 195 places, 475 transitions, 7059 flow [2024-06-20 15:41:55,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6853, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7059, PETRI_PLACES=195, PETRI_TRANSITIONS=475} [2024-06-20 15:41:55,667 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 150 predicate places. [2024-06-20 15:41:55,667 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 475 transitions, 7059 flow [2024-06-20 15:41:55,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:55,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:55,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:55,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:41:55,668 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 15:41:55,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:55,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1001499166, now seen corresponding path program 1 times [2024-06-20 15:41:55,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:55,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543866565] [2024-06-20 15:41:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:55,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:56,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:56,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543866565] [2024-06-20 15:41:56,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543866565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:56,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:56,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:56,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281394216] [2024-06-20 15:41:56,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:56,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:56,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:56,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:56,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:56,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:56,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 475 transitions, 7059 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:56,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:56,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:56,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:58,069 INFO L124 PetriNetUnfolderBase]: 3878/5932 cut-off events. [2024-06-20 15:41:58,069 INFO L125 PetriNetUnfolderBase]: For 319685/319713 co-relation queries the response was YES. [2024-06-20 15:41:58,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46510 conditions, 5932 events. 3878/5932 cut-off events. For 319685/319713 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 32004 event pairs, 915 based on Foata normal form. 28/5946 useless extension candidates. Maximal degree in co-relation 46423. Up to 4239 conditions per place. [2024-06-20 15:41:58,142 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 159 selfloop transitions, 355 changer transitions 0/521 dead transitions. [2024-06-20 15:41:58,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 521 transitions, 8543 flow [2024-06-20 15:41:58,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:58,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-20 15:41:58,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-20 15:41:58,144 INFO L175 Difference]: Start difference. First operand has 195 places, 475 transitions, 7059 flow. Second operand 9 states and 189 transitions. [2024-06-20 15:41:58,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 521 transitions, 8543 flow [2024-06-20 15:41:58,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 521 transitions, 8361 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-20 15:41:58,734 INFO L231 Difference]: Finished difference. Result has 197 places, 481 transitions, 7717 flow [2024-06-20 15:41:58,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6877, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7717, PETRI_PLACES=197, PETRI_TRANSITIONS=481} [2024-06-20 15:41:58,735 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 152 predicate places. [2024-06-20 15:41:58,735 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 481 transitions, 7717 flow [2024-06-20 15:41:58,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:58,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:58,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:58,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:41:58,736 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 15:41:58,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:58,736 INFO L85 PathProgramCache]: Analyzing trace with hash -330584032, now seen corresponding path program 2 times [2024-06-20 15:41:58,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:58,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097805176] [2024-06-20 15:41:58,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:58,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:59,836 INFO 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 15:41:59,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:59,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097805176] [2024-06-20 15:41:59,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097805176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:59,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:59,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:59,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273349351] [2024-06-20 15:41:59,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:59,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:59,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:59,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:59,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:59,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:41:59,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 481 transitions, 7717 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:59,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:59,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:41:59,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:01,008 INFO L124 PetriNetUnfolderBase]: 3887/5941 cut-off events. [2024-06-20 15:42:01,008 INFO L125 PetriNetUnfolderBase]: For 339792/339820 co-relation queries the response was YES. [2024-06-20 15:42:01,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48335 conditions, 5941 events. 3887/5941 cut-off events. For 339792/339820 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 32020 event pairs, 885 based on Foata normal form. 13/5944 useless extension candidates. Maximal degree in co-relation 48247. Up to 4988 conditions per place. [2024-06-20 15:42:01,076 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 310 selfloop transitions, 208 changer transitions 0/525 dead transitions. [2024-06-20 15:42:01,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 525 transitions, 9205 flow [2024-06-20 15:42:01,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:01,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:01,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-20 15:42:01,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-20 15:42:01,078 INFO L175 Difference]: Start difference. First operand has 197 places, 481 transitions, 7717 flow. Second operand 9 states and 183 transitions. [2024-06-20 15:42:01,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 525 transitions, 9205 flow [2024-06-20 15:42:01,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 525 transitions, 8819 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-20 15:42:01,770 INFO L231 Difference]: Finished difference. Result has 201 places, 487 transitions, 7885 flow [2024-06-20 15:42:01,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7331, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7885, PETRI_PLACES=201, PETRI_TRANSITIONS=487} [2024-06-20 15:42:01,771 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 156 predicate places. [2024-06-20 15:42:01,771 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 487 transitions, 7885 flow [2024-06-20 15:42:01,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:01,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:01,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:01,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 15:42:01,772 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 15:42:01,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:01,772 INFO L85 PathProgramCache]: Analyzing trace with hash -996851026, now seen corresponding path program 2 times [2024-06-20 15:42:01,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:01,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286610464] [2024-06-20 15:42:01,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:01,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:02,885 INFO 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 15:42:02,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:02,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286610464] [2024-06-20 15:42:02,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286610464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:02,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:02,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:02,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374062777] [2024-06-20 15:42:02,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:02,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:02,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:02,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:02,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:03,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:42:03,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 487 transitions, 7885 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:03,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:03,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:42:03,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:04,126 INFO L124 PetriNetUnfolderBase]: 3943/6030 cut-off events. [2024-06-20 15:42:04,126 INFO L125 PetriNetUnfolderBase]: For 360532/360557 co-relation queries the response was YES. [2024-06-20 15:42:04,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49999 conditions, 6030 events. 3943/6030 cut-off events. For 360532/360557 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 32619 event pairs, 907 based on Foata normal form. 26/6042 useless extension candidates. Maximal degree in co-relation 49909. Up to 4301 conditions per place. [2024-06-20 15:42:04,192 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 207 selfloop transitions, 325 changer transitions 0/539 dead transitions. [2024-06-20 15:42:04,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 539 transitions, 9616 flow [2024-06-20 15:42:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:04,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-20 15:42:04,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-20 15:42:04,194 INFO L175 Difference]: Start difference. First operand has 201 places, 487 transitions, 7885 flow. Second operand 9 states and 189 transitions. [2024-06-20 15:42:04,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 539 transitions, 9616 flow [2024-06-20 15:42:05,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 539 transitions, 9386 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-20 15:42:05,025 INFO L231 Difference]: Finished difference. Result has 205 places, 493 transitions, 8399 flow [2024-06-20 15:42:05,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7655, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8399, PETRI_PLACES=205, PETRI_TRANSITIONS=493} [2024-06-20 15:42:05,026 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 160 predicate places. [2024-06-20 15:42:05,026 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 493 transitions, 8399 flow [2024-06-20 15:42:05,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:05,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:05,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:05,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 15:42:05,027 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 15:42:05,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:05,028 INFO L85 PathProgramCache]: Analyzing trace with hash -159708622, now seen corresponding path program 3 times [2024-06-20 15:42:05,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:05,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259650613] [2024-06-20 15:42:05,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:05,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:05,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:06,155 INFO 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 15:42:06,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:06,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259650613] [2024-06-20 15:42:06,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259650613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:06,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:06,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:06,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985989749] [2024-06-20 15:42:06,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:06,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:06,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:06,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:06,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:06,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:42:06,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 493 transitions, 8399 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:06,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:06,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:42:06,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:07,487 INFO L124 PetriNetUnfolderBase]: 3952/6038 cut-off events. [2024-06-20 15:42:07,487 INFO L125 PetriNetUnfolderBase]: For 377297/377322 co-relation queries the response was YES. [2024-06-20 15:42:07,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51389 conditions, 6038 events. 3952/6038 cut-off events. For 377297/377322 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 32580 event pairs, 895 based on Foata normal form. 11/6039 useless extension candidates. Maximal degree in co-relation 51297. Up to 5078 conditions per place. [2024-06-20 15:42:07,551 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 332 selfloop transitions, 197 changer transitions 0/536 dead transitions. [2024-06-20 15:42:07,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 536 transitions, 9900 flow [2024-06-20 15:42:07,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:07,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:07,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-20 15:42:07,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-20 15:42:07,552 INFO L175 Difference]: Start difference. First operand has 205 places, 493 transitions, 8399 flow. Second operand 9 states and 181 transitions. [2024-06-20 15:42:07,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 536 transitions, 9900 flow [2024-06-20 15:42:08,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 536 transitions, 9459 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 15:42:08,305 INFO L231 Difference]: Finished difference. Result has 209 places, 496 transitions, 8414 flow [2024-06-20 15:42:08,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7958, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8414, PETRI_PLACES=209, PETRI_TRANSITIONS=496} [2024-06-20 15:42:08,306 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 164 predicate places. [2024-06-20 15:42:08,306 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 496 transitions, 8414 flow [2024-06-20 15:42:08,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:08,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:08,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:08,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 15:42:08,307 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:08,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:08,307 INFO L85 PathProgramCache]: Analyzing trace with hash -325942216, now seen corresponding path program 3 times [2024-06-20 15:42:08,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:08,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50736903] [2024-06-20 15:42:08,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:08,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:08,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:09,318 INFO 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 15:42:09,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:09,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50736903] [2024-06-20 15:42:09,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50736903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:09,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:09,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:09,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642892665] [2024-06-20 15:42:09,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:09,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:09,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:09,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:09,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:09,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:42:09,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 496 transitions, 8414 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:09,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:09,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:42:09,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:10,610 INFO L124 PetriNetUnfolderBase]: 3944/6030 cut-off events. [2024-06-20 15:42:10,611 INFO L125 PetriNetUnfolderBase]: For 391683/391708 co-relation queries the response was YES. [2024-06-20 15:42:10,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51307 conditions, 6030 events. 3944/6030 cut-off events. For 391683/391708 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 32619 event pairs, 901 based on Foata normal form. 26/6042 useless extension candidates. Maximal degree in co-relation 51214. Up to 4309 conditions per place. [2024-06-20 15:42:10,678 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 225 selfloop transitions, 312 changer transitions 0/544 dead transitions. [2024-06-20 15:42:10,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 544 transitions, 9967 flow [2024-06-20 15:42:10,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:10,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-20 15:42:10,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-20 15:42:10,679 INFO L175 Difference]: Start difference. First operand has 209 places, 496 transitions, 8414 flow. Second operand 9 states and 189 transitions. [2024-06-20 15:42:10,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 544 transitions, 9967 flow [2024-06-20 15:42:11,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 544 transitions, 9617 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 15:42:11,619 INFO L231 Difference]: Finished difference. Result has 212 places, 496 transitions, 8704 flow [2024-06-20 15:42:11,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8064, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8704, PETRI_PLACES=212, PETRI_TRANSITIONS=496} [2024-06-20 15:42:11,621 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 167 predicate places. [2024-06-20 15:42:11,621 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 496 transitions, 8704 flow [2024-06-20 15:42:11,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:11,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:11,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:11,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 15:42:11,621 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:11,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:11,622 INFO L85 PathProgramCache]: Analyzing trace with hash -153445816, now seen corresponding path program 4 times [2024-06-20 15:42:11,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:11,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789387015] [2024-06-20 15:42:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:11,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:12,767 INFO 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 15:42:12,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:12,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789387015] [2024-06-20 15:42:12,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789387015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:12,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:12,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:12,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936412291] [2024-06-20 15:42:12,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:12,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:12,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:12,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:12,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:12,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:42:12,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 496 transitions, 8704 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:12,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:12,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:42:12,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:14,017 INFO L124 PetriNetUnfolderBase]: 4023/6148 cut-off events. [2024-06-20 15:42:14,017 INFO L125 PetriNetUnfolderBase]: For 421387/421410 co-relation queries the response was YES. [2024-06-20 15:42:14,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53148 conditions, 6148 events. 4023/6148 cut-off events. For 421387/421410 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 33302 event pairs, 915 based on Foata normal form. 24/6159 useless extension candidates. Maximal degree in co-relation 53054. Up to 4382 conditions per place. [2024-06-20 15:42:14,089 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 256 selfloop transitions, 305 changer transitions 0/568 dead transitions. [2024-06-20 15:42:14,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 568 transitions, 10940 flow [2024-06-20 15:42:14,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:14,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-20 15:42:14,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-20 15:42:14,096 INFO L175 Difference]: Start difference. First operand has 212 places, 496 transitions, 8704 flow. Second operand 9 states and 192 transitions. [2024-06-20 15:42:14,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 568 transitions, 10940 flow [2024-06-20 15:42:15,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 568 transitions, 10244 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 15:42:15,061 INFO L231 Difference]: Finished difference. Result has 213 places, 505 transitions, 8776 flow [2024-06-20 15:42:15,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8026, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8776, PETRI_PLACES=213, PETRI_TRANSITIONS=505} [2024-06-20 15:42:15,062 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 168 predicate places. [2024-06-20 15:42:15,062 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 505 transitions, 8776 flow [2024-06-20 15:42:15,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:15,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:15,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:15,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 15:42:15,063 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:15,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:15,064 INFO L85 PathProgramCache]: Analyzing trace with hash -153452326, now seen corresponding path program 5 times [2024-06-20 15:42:15,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:15,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948539687] [2024-06-20 15:42:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:15,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:16,159 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 15:42:16,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:16,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948539687] [2024-06-20 15:42:16,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948539687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:16,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:16,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:16,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107053816] [2024-06-20 15:42:16,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:16,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:16,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:16,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:16,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:16,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:42:16,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 505 transitions, 8776 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:16,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:16,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:42:16,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:17,445 INFO L124 PetriNetUnfolderBase]: 3985/6079 cut-off events. [2024-06-20 15:42:17,446 INFO L125 PetriNetUnfolderBase]: For 430139/430162 co-relation queries the response was YES. [2024-06-20 15:42:17,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52597 conditions, 6079 events. 3985/6079 cut-off events. For 430139/430162 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 32721 event pairs, 968 based on Foata normal form. 24/6092 useless extension candidates. Maximal degree in co-relation 52502. Up to 4368 conditions per place. [2024-06-20 15:42:17,518 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 240 selfloop transitions, 315 changer transitions 0/562 dead transitions. [2024-06-20 15:42:17,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 562 transitions, 10653 flow [2024-06-20 15:42:17,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:17,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:17,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-20 15:42:17,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-20 15:42:17,523 INFO L175 Difference]: Start difference. First operand has 213 places, 505 transitions, 8776 flow. Second operand 9 states and 189 transitions. [2024-06-20 15:42:17,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 562 transitions, 10653 flow [2024-06-20 15:42:18,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 562 transitions, 10216 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 15:42:18,688 INFO L231 Difference]: Finished difference. Result has 218 places, 505 transitions, 8983 flow [2024-06-20 15:42:18,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8339, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8983, PETRI_PLACES=218, PETRI_TRANSITIONS=505} [2024-06-20 15:42:18,690 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 173 predicate places. [2024-06-20 15:42:18,690 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 505 transitions, 8983 flow [2024-06-20 15:42:18,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:18,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:18,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:18,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 15:42:18,692 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:18,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:18,692 INFO L85 PathProgramCache]: Analyzing trace with hash -153452512, now seen corresponding path program 4 times [2024-06-20 15:42:18,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:18,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703493218] [2024-06-20 15:42:18,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:18,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:19,774 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 15:42:19,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:19,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703493218] [2024-06-20 15:42:19,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703493218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:19,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:19,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:19,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710544044] [2024-06-20 15:42:19,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:19,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:19,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:19,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:19,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:19,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:42:19,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 505 transitions, 8983 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:19,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:19,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:42:19,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:21,027 INFO L124 PetriNetUnfolderBase]: 3996/6096 cut-off events. [2024-06-20 15:42:21,027 INFO L125 PetriNetUnfolderBase]: For 448720/448743 co-relation queries the response was YES. [2024-06-20 15:42:21,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53198 conditions, 6096 events. 3996/6096 cut-off events. For 448720/448743 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 32843 event pairs, 968 based on Foata normal form. 9/6097 useless extension candidates. Maximal degree in co-relation 53102. Up to 5136 conditions per place. [2024-06-20 15:42:21,104 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 347 selfloop transitions, 193 changer transitions 0/547 dead transitions. [2024-06-20 15:42:21,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 547 transitions, 10551 flow [2024-06-20 15:42:21,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:21,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-20 15:42:21,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-20 15:42:21,113 INFO L175 Difference]: Start difference. First operand has 218 places, 505 transitions, 8983 flow. Second operand 9 states and 179 transitions. [2024-06-20 15:42:21,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 547 transitions, 10551 flow [2024-06-20 15:42:22,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 547 transitions, 9942 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:42:22,380 INFO L231 Difference]: Finished difference. Result has 220 places, 508 transitions, 8823 flow [2024-06-20 15:42:22,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8374, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8823, PETRI_PLACES=220, PETRI_TRANSITIONS=508} [2024-06-20 15:42:22,381 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 175 predicate places. [2024-06-20 15:42:22,381 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 508 transitions, 8823 flow [2024-06-20 15:42:22,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:22,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:22,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:22,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 15:42:22,382 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:22,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:22,383 INFO L85 PathProgramCache]: Analyzing trace with hash -824130496, now seen corresponding path program 6 times [2024-06-20 15:42:22,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:22,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245482415] [2024-06-20 15:42:22,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:22,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:23,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:23,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:23,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245482415] [2024-06-20 15:42:23,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245482415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:23,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:23,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:23,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218756370] [2024-06-20 15:42:23,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:23,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:23,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:23,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:23,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:23,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:42:23,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 508 transitions, 8823 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:23,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:23,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:42:23,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:24,653 INFO L124 PetriNetUnfolderBase]: 3998/6109 cut-off events. [2024-06-20 15:42:24,654 INFO L125 PetriNetUnfolderBase]: For 463177/463200 co-relation queries the response was YES. [2024-06-20 15:42:24,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53241 conditions, 6109 events. 3998/6109 cut-off events. For 463177/463200 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 32985 event pairs, 946 based on Foata normal form. 24/6119 useless extension candidates. Maximal degree in co-relation 53144. Up to 4361 conditions per place. [2024-06-20 15:42:24,714 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 216 selfloop transitions, 335 changer transitions 0/558 dead transitions. [2024-06-20 15:42:24,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 558 transitions, 10457 flow [2024-06-20 15:42:24,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:24,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:24,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-20 15:42:24,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-20 15:42:24,716 INFO L175 Difference]: Start difference. First operand has 220 places, 508 transitions, 8823 flow. Second operand 9 states and 185 transitions. [2024-06-20 15:42:24,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 558 transitions, 10457 flow [2024-06-20 15:42:25,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 558 transitions, 10090 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 15:42:25,380 INFO L231 Difference]: Finished difference. Result has 223 places, 508 transitions, 9143 flow [2024-06-20 15:42:25,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8456, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9143, PETRI_PLACES=223, PETRI_TRANSITIONS=508} [2024-06-20 15:42:25,381 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 178 predicate places. [2024-06-20 15:42:25,381 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 508 transitions, 9143 flow [2024-06-20 15:42:25,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:25,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:25,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:25,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 15:42:25,382 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 15:42:25,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:25,382 INFO L85 PathProgramCache]: Analyzing trace with hash 153983321, now seen corresponding path program 1 times [2024-06-20 15:42:25,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:25,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123630179] [2024-06-20 15:42:25,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:25,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:25,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:26,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:26,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123630179] [2024-06-20 15:42:26,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123630179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:26,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:26,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:42:26,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889988149] [2024-06-20 15:42:26,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:26,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:42:26,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:26,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:42:26,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:42:26,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 15:42:26,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 508 transitions, 9143 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:26,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:26,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 15:42:26,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:27,684 INFO L124 PetriNetUnfolderBase]: 3859/6029 cut-off events. [2024-06-20 15:42:27,685 INFO L125 PetriNetUnfolderBase]: For 501437/501555 co-relation queries the response was YES. [2024-06-20 15:42:27,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52465 conditions, 6029 events. 3859/6029 cut-off events. For 501437/501555 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 33520 event pairs, 1193 based on Foata normal form. 53/6051 useless extension candidates. Maximal degree in co-relation 52367. Up to 5255 conditions per place. [2024-06-20 15:42:27,766 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 317 selfloop transitions, 21 changer transitions 0/527 dead transitions. [2024-06-20 15:42:27,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 527 transitions, 10032 flow [2024-06-20 15:42:27,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:42:27,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:42:27,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-20 15:42:27,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 15:42:27,767 INFO L175 Difference]: Start difference. First operand has 223 places, 508 transitions, 9143 flow. Second operand 7 states and 132 transitions. [2024-06-20 15:42:27,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 527 transitions, 10032 flow [2024-06-20 15:42:28,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 527 transitions, 9254 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 15:42:28,975 INFO L231 Difference]: Finished difference. Result has 221 places, 514 transitions, 8480 flow [2024-06-20 15:42:28,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8365, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8480, PETRI_PLACES=221, PETRI_TRANSITIONS=514} [2024-06-20 15:42:28,976 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 176 predicate places. [2024-06-20 15:42:28,976 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 514 transitions, 8480 flow [2024-06-20 15:42:28,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:28,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:28,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:28,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 15:42:28,977 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:28,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:28,977 INFO L85 PathProgramCache]: Analyzing trace with hash -536861034, now seen corresponding path program 7 times [2024-06-20 15:42:28,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:28,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207927269] [2024-06-20 15:42:28,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:28,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:30,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:30,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207927269] [2024-06-20 15:42:30,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207927269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:30,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:30,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:30,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237604617] [2024-06-20 15:42:30,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:30,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:30,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:30,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:30,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:30,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:42:30,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 514 transitions, 8480 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:30,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:30,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:42:30,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:31,463 INFO L124 PetriNetUnfolderBase]: 4057/6207 cut-off events. [2024-06-20 15:42:31,464 INFO L125 PetriNetUnfolderBase]: For 511634/511658 co-relation queries the response was YES. [2024-06-20 15:42:31,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54638 conditions, 6207 events. 4057/6207 cut-off events. For 511634/511658 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 33840 event pairs, 1057 based on Foata normal form. 11/6202 useless extension candidates. Maximal degree in co-relation 54539. Up to 5700 conditions per place. [2024-06-20 15:42:31,534 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 502 selfloop transitions, 40 changer transitions 0/551 dead transitions. [2024-06-20 15:42:31,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 551 transitions, 9808 flow [2024-06-20 15:42:31,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:31,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 15:42:31,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-20 15:42:31,538 INFO L175 Difference]: Start difference. First operand has 221 places, 514 transitions, 8480 flow. Second operand 9 states and 169 transitions. [2024-06-20 15:42:31,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 551 transitions, 9808 flow [2024-06-20 15:42:32,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 551 transitions, 9773 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-20 15:42:32,755 INFO L231 Difference]: Finished difference. Result has 227 places, 517 transitions, 8587 flow [2024-06-20 15:42:32,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8445, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8587, PETRI_PLACES=227, PETRI_TRANSITIONS=517} [2024-06-20 15:42:32,756 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-20 15:42:32,756 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 517 transitions, 8587 flow [2024-06-20 15:42:32,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:32,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:32,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:32,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 15:42:32,756 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:32,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:32,757 INFO L85 PathProgramCache]: Analyzing trace with hash -822198240, now seen corresponding path program 5 times [2024-06-20 15:42:32,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:32,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520818843] [2024-06-20 15:42:32,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:32,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:33,848 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 15:42:33,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:33,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520818843] [2024-06-20 15:42:33,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520818843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:33,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:33,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:33,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987304072] [2024-06-20 15:42:33,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:33,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:33,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:33,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:33,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:33,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:42:33,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 517 transitions, 8587 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:33,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:33,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:42:33,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:35,266 INFO L124 PetriNetUnfolderBase]: 4038/6169 cut-off events. [2024-06-20 15:42:35,267 INFO L125 PetriNetUnfolderBase]: For 523749/523773 co-relation queries the response was YES. [2024-06-20 15:42:35,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54770 conditions, 6169 events. 4038/6169 cut-off events. For 523749/523773 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 33601 event pairs, 1095 based on Foata normal form. 7/6163 useless extension candidates. Maximal degree in co-relation 54669. Up to 5758 conditions per place. [2024-06-20 15:42:35,338 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 495 selfloop transitions, 39 changer transitions 0/543 dead transitions. [2024-06-20 15:42:35,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 543 transitions, 9797 flow [2024-06-20 15:42:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:35,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:35,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 15:42:35,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-20 15:42:35,339 INFO L175 Difference]: Start difference. First operand has 227 places, 517 transitions, 8587 flow. Second operand 9 states and 166 transitions. [2024-06-20 15:42:35,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 543 transitions, 9797 flow [2024-06-20 15:42:36,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 543 transitions, 9675 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-20 15:42:36,328 INFO L231 Difference]: Finished difference. Result has 229 places, 517 transitions, 8554 flow [2024-06-20 15:42:36,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8465, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8554, PETRI_PLACES=229, PETRI_TRANSITIONS=517} [2024-06-20 15:42:36,329 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-06-20 15:42:36,329 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 517 transitions, 8554 flow [2024-06-20 15:42:36,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:36,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:36,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:36,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 15:42:36,330 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:36,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:36,330 INFO L85 PathProgramCache]: Analyzing trace with hash -526376586, now seen corresponding path program 1 times [2024-06-20 15:42:36,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:36,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643921154] [2024-06-20 15:42:36,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:36,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:37,437 INFO 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 15:42:37,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:37,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643921154] [2024-06-20 15:42:37,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643921154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:37,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:37,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:37,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031205216] [2024-06-20 15:42:37,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:37,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:37,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:37,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:37,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:37,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:42:37,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 517 transitions, 8554 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:37,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:37,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:42:37,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:38,968 INFO L124 PetriNetUnfolderBase]: 4236/6441 cut-off events. [2024-06-20 15:42:38,968 INFO L125 PetriNetUnfolderBase]: For 556909/556986 co-relation queries the response was YES. [2024-06-20 15:42:39,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56352 conditions, 6441 events. 4236/6441 cut-off events. For 556909/556986 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 34586 event pairs, 1186 based on Foata normal form. 35/6415 useless extension candidates. Maximal degree in co-relation 56250. Up to 5833 conditions per place. [2024-06-20 15:42:39,049 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 447 selfloop transitions, 30 changer transitions 0/555 dead transitions. [2024-06-20 15:42:39,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 555 transitions, 9863 flow [2024-06-20 15:42:39,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:42:39,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:42:39,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 15:42:39,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-20 15:42:39,051 INFO L175 Difference]: Start difference. First operand has 229 places, 517 transitions, 8554 flow. Second operand 8 states and 151 transitions. [2024-06-20 15:42:39,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 555 transitions, 9863 flow [2024-06-20 15:42:40,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 555 transitions, 9530 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-20 15:42:40,326 INFO L231 Difference]: Finished difference. Result has 227 places, 530 transitions, 8547 flow [2024-06-20 15:42:40,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8221, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8547, PETRI_PLACES=227, PETRI_TRANSITIONS=530} [2024-06-20 15:42:40,327 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-20 15:42:40,327 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 530 transitions, 8547 flow [2024-06-20 15:42:40,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:40,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:40,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:40,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 15:42:40,327 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:40,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:40,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1114668958, now seen corresponding path program 8 times [2024-06-20 15:42:40,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:40,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103822079] [2024-06-20 15:42:40,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:40,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:41,406 INFO 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 15:42:41,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:41,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103822079] [2024-06-20 15:42:41,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103822079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:41,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:41,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:41,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121103824] [2024-06-20 15:42:41,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:41,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:41,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:41,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:41,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:41,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:42:41,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 530 transitions, 8547 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:41,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:41,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:42:41,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:42,892 INFO L124 PetriNetUnfolderBase]: 4087/6248 cut-off events. [2024-06-20 15:42:42,892 INFO L125 PetriNetUnfolderBase]: For 556852/556872 co-relation queries the response was YES. [2024-06-20 15:42:42,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56165 conditions, 6248 events. 4087/6248 cut-off events. For 556852/556872 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 34194 event pairs, 1036 based on Foata normal form. 9/6247 useless extension candidates. Maximal degree in co-relation 56062. Up to 5458 conditions per place. [2024-06-20 15:42:42,965 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 479 selfloop transitions, 95 changer transitions 0/583 dead transitions. [2024-06-20 15:42:42,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 583 transitions, 10303 flow [2024-06-20 15:42:42,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:42,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-20 15:42:42,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-20 15:42:42,980 INFO L175 Difference]: Start difference. First operand has 227 places, 530 transitions, 8547 flow. Second operand 9 states and 178 transitions. [2024-06-20 15:42:42,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 583 transitions, 10303 flow [2024-06-20 15:42:44,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 583 transitions, 10222 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 15:42:44,386 INFO L231 Difference]: Finished difference. Result has 230 places, 533 transitions, 8718 flow [2024-06-20 15:42:44,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8466, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8718, PETRI_PLACES=230, PETRI_TRANSITIONS=533} [2024-06-20 15:42:44,386 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 185 predicate places. [2024-06-20 15:42:44,386 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 533 transitions, 8718 flow [2024-06-20 15:42:44,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:44,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:44,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:44,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 15:42:44,387 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:44,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:44,387 INFO L85 PathProgramCache]: Analyzing trace with hash -822198054, now seen corresponding path program 9 times [2024-06-20 15:42:44,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:44,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170298077] [2024-06-20 15:42:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:44,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:45,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:45,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170298077] [2024-06-20 15:42:45,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170298077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:45,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:45,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:45,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488812206] [2024-06-20 15:42:45,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:45,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:45,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:45,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:45,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:45,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:42:45,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 533 transitions, 8718 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:45,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:45,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:42:45,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:46,875 INFO L124 PetriNetUnfolderBase]: 4109/6280 cut-off events. [2024-06-20 15:42:46,875 INFO L125 PetriNetUnfolderBase]: For 578853/578873 co-relation queries the response was YES. [2024-06-20 15:42:46,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56984 conditions, 6280 events. 4109/6280 cut-off events. For 578853/578873 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 34292 event pairs, 1024 based on Foata normal form. 9/6279 useless extension candidates. Maximal degree in co-relation 56880. Up to 5477 conditions per place. [2024-06-20 15:42:46,949 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 451 selfloop transitions, 116 changer transitions 0/576 dead transitions. [2024-06-20 15:42:46,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 576 transitions, 10374 flow [2024-06-20 15:42:46,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:46,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:46,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-20 15:42:46,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 15:42:46,951 INFO L175 Difference]: Start difference. First operand has 230 places, 533 transitions, 8718 flow. Second operand 9 states and 176 transitions. [2024-06-20 15:42:46,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 576 transitions, 10374 flow [2024-06-20 15:42:48,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 576 transitions, 10058 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-20 15:42:48,011 INFO L231 Difference]: Finished difference. Result has 232 places, 536 transitions, 8701 flow [2024-06-20 15:42:48,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8412, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8701, PETRI_PLACES=232, PETRI_TRANSITIONS=536} [2024-06-20 15:42:48,012 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 187 predicate places. [2024-06-20 15:42:48,012 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 536 transitions, 8701 flow [2024-06-20 15:42:48,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:48,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:48,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:48,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 15:42:48,013 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:48,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:48,013 INFO L85 PathProgramCache]: Analyzing trace with hash -822191544, now seen corresponding path program 10 times [2024-06-20 15:42:48,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:48,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020589109] [2024-06-20 15:42:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:48,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:48,987 INFO 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 15:42:48,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:48,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020589109] [2024-06-20 15:42:48,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020589109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:48,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:48,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:48,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120601380] [2024-06-20 15:42:48,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:48,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:48,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:48,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:48,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:49,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:42:49,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 536 transitions, 8701 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:49,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:49,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:42:49,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:50,455 INFO L124 PetriNetUnfolderBase]: 4099/6266 cut-off events. [2024-06-20 15:42:50,455 INFO L125 PetriNetUnfolderBase]: For 591355/591375 co-relation queries the response was YES. [2024-06-20 15:42:50,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57116 conditions, 6266 events. 4099/6266 cut-off events. For 591355/591375 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 34279 event pairs, 1024 based on Foata normal form. 9/6265 useless extension candidates. Maximal degree in co-relation 57011. Up to 5469 conditions per place. [2024-06-20 15:42:50,535 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 462 selfloop transitions, 106 changer transitions 0/577 dead transitions. [2024-06-20 15:42:50,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 577 transitions, 10127 flow [2024-06-20 15:42:50,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:50,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:50,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-20 15:42:50,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-20 15:42:50,536 INFO L175 Difference]: Start difference. First operand has 232 places, 536 transitions, 8701 flow. Second operand 9 states and 175 transitions. [2024-06-20 15:42:50,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 577 transitions, 10127 flow [2024-06-20 15:42:51,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 577 transitions, 9536 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-20 15:42:51,657 INFO L231 Difference]: Finished difference. Result has 233 places, 536 transitions, 8334 flow [2024-06-20 15:42:51,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8110, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8334, PETRI_PLACES=233, PETRI_TRANSITIONS=536} [2024-06-20 15:42:51,659 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 188 predicate places. [2024-06-20 15:42:51,659 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 536 transitions, 8334 flow [2024-06-20 15:42:51,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:51,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:51,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:51,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 15:42:51,659 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 15:42:51,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:51,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1636666511, now seen corresponding path program 2 times [2024-06-20 15:42:51,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:51,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267353864] [2024-06-20 15:42:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:51,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:52,504 INFO 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 15:42:52,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:52,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267353864] [2024-06-20 15:42:52,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267353864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:52,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:52,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:42:52,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980815109] [2024-06-20 15:42:52,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:52,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:42:52,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:52,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:42:52,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:42:52,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 15:42:52,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 536 transitions, 8334 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:52,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:52,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 15:42:52,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:53,813 INFO L124 PetriNetUnfolderBase]: 3935/6150 cut-off events. [2024-06-20 15:42:53,814 INFO L125 PetriNetUnfolderBase]: For 616774/616890 co-relation queries the response was YES. [2024-06-20 15:42:53,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55040 conditions, 6150 events. 3935/6150 cut-off events. For 616774/616890 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 34450 event pairs, 1191 based on Foata normal form. 52/6160 useless extension candidates. Maximal degree in co-relation 54934. Up to 5366 conditions per place. [2024-06-20 15:42:53,894 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 340 selfloop transitions, 12 changer transitions 0/544 dead transitions. [2024-06-20 15:42:53,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 544 transitions, 9068 flow [2024-06-20 15:42:53,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:42:53,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:42:53,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-20 15:42:53,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42803030303030304 [2024-06-20 15:42:53,896 INFO L175 Difference]: Start difference. First operand has 233 places, 536 transitions, 8334 flow. Second operand 6 states and 113 transitions. [2024-06-20 15:42:53,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 544 transitions, 9068 flow [2024-06-20 15:42:55,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 544 transitions, 8776 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-20 15:42:55,337 INFO L231 Difference]: Finished difference. Result has 230 places, 536 transitions, 8072 flow [2024-06-20 15:42:55,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8042, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8072, PETRI_PLACES=230, PETRI_TRANSITIONS=536} [2024-06-20 15:42:55,338 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 185 predicate places. [2024-06-20 15:42:55,338 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 536 transitions, 8072 flow [2024-06-20 15:42:55,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:55,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:55,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:55,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 15:42:55,339 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 15:42:55,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:55,339 INFO L85 PathProgramCache]: Analyzing trace with hash 522139707, now seen corresponding path program 3 times [2024-06-20 15:42:55,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:55,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332713864] [2024-06-20 15:42:55,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:55,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:56,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:56,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332713864] [2024-06-20 15:42:56,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332713864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:56,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:56,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:42:56,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198924296] [2024-06-20 15:42:56,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:56,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:42:56,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:56,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:42:56,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:42:56,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 15:42:56,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 536 transitions, 8072 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:56,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:56,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 15:42:56,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:57,556 INFO L124 PetriNetUnfolderBase]: 3963/6190 cut-off events. [2024-06-20 15:42:57,557 INFO L125 PetriNetUnfolderBase]: For 628687/628779 co-relation queries the response was YES. [2024-06-20 15:42:57,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55257 conditions, 6190 events. 3963/6190 cut-off events. For 628687/628779 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 34506 event pairs, 1116 based on Foata normal form. 43/6204 useless extension candidates. Maximal degree in co-relation 55150. Up to 5344 conditions per place. [2024-06-20 15:42:57,632 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 337 selfloop transitions, 31 changer transitions 0/560 dead transitions. [2024-06-20 15:42:57,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 560 transitions, 8944 flow [2024-06-20 15:42:57,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:42:57,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:42:57,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-20 15:42:57,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-20 15:42:57,634 INFO L175 Difference]: Start difference. First operand has 230 places, 536 transitions, 8072 flow. Second operand 7 states and 140 transitions. [2024-06-20 15:42:57,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 560 transitions, 8944 flow [2024-06-20 15:42:59,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 560 transitions, 8916 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 15:42:59,154 INFO L231 Difference]: Finished difference. Result has 234 places, 543 transitions, 8208 flow [2024-06-20 15:42:59,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8044, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8208, PETRI_PLACES=234, PETRI_TRANSITIONS=543} [2024-06-20 15:42:59,155 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 189 predicate places. [2024-06-20 15:42:59,155 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 543 transitions, 8208 flow [2024-06-20 15:42:59,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:59,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:59,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:59,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 15:42:59,156 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 15:42:59,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:59,156 INFO L85 PathProgramCache]: Analyzing trace with hash 161609817, now seen corresponding path program 1 times [2024-06-20 15:42:59,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:59,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504114663] [2024-06-20 15:42:59,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:59,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:59,914 INFO 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 15:42:59,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:59,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504114663] [2024-06-20 15:42:59,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504114663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:59,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:59,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:42:59,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005186972] [2024-06-20 15:42:59,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:59,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:42:59,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:59,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:42:59,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:42:59,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-20 15:42:59,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 543 transitions, 8208 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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 15:42:59,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:59,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-20 15:42:59,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:01,488 INFO L124 PetriNetUnfolderBase]: 4525/6763 cut-off events. [2024-06-20 15:43:01,489 INFO L125 PetriNetUnfolderBase]: For 653784/653865 co-relation queries the response was YES. [2024-06-20 15:43:01,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59947 conditions, 6763 events. 4525/6763 cut-off events. For 653784/653865 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 35383 event pairs, 1282 based on Foata normal form. 34/6730 useless extension candidates. Maximal degree in co-relation 59838. Up to 6364 conditions per place. [2024-06-20 15:43:01,574 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 470 selfloop transitions, 17 changer transitions 0/561 dead transitions. [2024-06-20 15:43:01,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 561 transitions, 9416 flow [2024-06-20 15:43:01,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:43:01,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:43:01,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-20 15:43:01,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128787878787879 [2024-06-20 15:43:01,576 INFO L175 Difference]: Start difference. First operand has 234 places, 543 transitions, 8208 flow. Second operand 6 states and 109 transitions. [2024-06-20 15:43:01,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 561 transitions, 9416 flow [2024-06-20 15:43:03,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 561 transitions, 9348 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-20 15:43:03,259 INFO L231 Difference]: Finished difference. Result has 237 places, 549 transitions, 8258 flow [2024-06-20 15:43:03,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8140, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8258, PETRI_PLACES=237, PETRI_TRANSITIONS=549} [2024-06-20 15:43:03,259 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 192 predicate places. [2024-06-20 15:43:03,260 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 549 transitions, 8258 flow [2024-06-20 15:43:03,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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 15:43:03,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:03,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:03,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 15:43:03,260 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 15:43:03,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:03,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1684935867, now seen corresponding path program 2 times [2024-06-20 15:43:03,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:03,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362494376] [2024-06-20 15:43:03,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:03,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:04,010 INFO 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 15:43:04,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:04,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362494376] [2024-06-20 15:43:04,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362494376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:04,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:04,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:43:04,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088881131] [2024-06-20 15:43:04,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:04,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:43:04,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:04,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:43:04,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:43:04,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-20 15:43:04,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 549 transitions, 8258 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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 15:43:04,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:04,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-20 15:43:04,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:05,508 INFO L124 PetriNetUnfolderBase]: 4522/6760 cut-off events. [2024-06-20 15:43:05,508 INFO L125 PetriNetUnfolderBase]: For 674351/674435 co-relation queries the response was YES. [2024-06-20 15:43:05,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60608 conditions, 6760 events. 4522/6760 cut-off events. For 674351/674435 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 35399 event pairs, 1285 based on Foata normal form. 36/6728 useless extension candidates. Maximal degree in co-relation 60498. Up to 6361 conditions per place. [2024-06-20 15:43:05,590 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 466 selfloop transitions, 17 changer transitions 0/557 dead transitions. [2024-06-20 15:43:05,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 557 transitions, 9254 flow [2024-06-20 15:43:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:43:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:43:05,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-20 15:43:05,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-20 15:43:05,591 INFO L175 Difference]: Start difference. First operand has 237 places, 549 transitions, 8258 flow. Second operand 6 states and 105 transitions. [2024-06-20 15:43:05,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 557 transitions, 9254 flow [2024-06-20 15:43:07,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 557 transitions, 9197 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-20 15:43:07,234 INFO L231 Difference]: Finished difference. Result has 241 places, 549 transitions, 8241 flow [2024-06-20 15:43:07,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8201, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8241, PETRI_PLACES=241, PETRI_TRANSITIONS=549} [2024-06-20 15:43:07,235 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 196 predicate places. [2024-06-20 15:43:07,235 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 549 transitions, 8241 flow [2024-06-20 15:43:07,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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 15:43:07,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:07,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:07,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 15:43:07,235 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:07,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:07,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1661978185, now seen corresponding path program 1 times [2024-06-20 15:43:07,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:07,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438033289] [2024-06-20 15:43:07,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:07,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:08,694 INFO 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 15:43:08,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:08,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438033289] [2024-06-20 15:43:08,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438033289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:08,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:08,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:43:08,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968280519] [2024-06-20 15:43:08,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:08,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:43:08,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:08,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:43:08,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:43:08,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:43:08,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 549 transitions, 8241 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:08,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:08,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:43:08,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:10,424 INFO L124 PetriNetUnfolderBase]: 4138/6303 cut-off events. [2024-06-20 15:43:10,425 INFO L125 PetriNetUnfolderBase]: For 679969/680006 co-relation queries the response was YES. [2024-06-20 15:43:10,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58949 conditions, 6303 events. 4138/6303 cut-off events. For 679969/680006 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 34340 event pairs, 905 based on Foata normal form. 11/6305 useless extension candidates. Maximal degree in co-relation 58837. Up to 5747 conditions per place. [2024-06-20 15:43:10,507 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 512 selfloop transitions, 78 changer transitions 0/603 dead transitions. [2024-06-20 15:43:10,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 603 transitions, 9762 flow [2024-06-20 15:43:10,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:43:10,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:43:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-20 15:43:10,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44421487603305787 [2024-06-20 15:43:10,509 INFO L175 Difference]: Start difference. First operand has 241 places, 549 transitions, 8241 flow. Second operand 11 states and 215 transitions. [2024-06-20 15:43:10,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 603 transitions, 9762 flow [2024-06-20 15:43:11,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 603 transitions, 9712 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 15:43:11,538 INFO L231 Difference]: Finished difference. Result has 247 places, 552 transitions, 8424 flow [2024-06-20 15:43:11,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8191, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8424, PETRI_PLACES=247, PETRI_TRANSITIONS=552} [2024-06-20 15:43:11,539 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 202 predicate places. [2024-06-20 15:43:11,539 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 552 transitions, 8424 flow [2024-06-20 15:43:11,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:11,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:11,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:11,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 15:43:11,540 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:11,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:11,540 INFO L85 PathProgramCache]: Analyzing trace with hash 560285224, now seen corresponding path program 1 times [2024-06-20 15:43:11,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:11,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269903317] [2024-06-20 15:43:11,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:11,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:12,656 INFO 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 15:43:12,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:12,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269903317] [2024-06-20 15:43:12,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269903317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:12,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:12,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:43:12,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221806400] [2024-06-20 15:43:12,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:12,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:43:12,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:12,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:43:12,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:43:12,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:43:12,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 552 transitions, 8424 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:12,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:12,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:43:12,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:14,340 INFO L124 PetriNetUnfolderBase]: 4162/6336 cut-off events. [2024-06-20 15:43:14,340 INFO L125 PetriNetUnfolderBase]: For 709137/709180 co-relation queries the response was YES. [2024-06-20 15:43:14,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60179 conditions, 6336 events. 4162/6336 cut-off events. For 709137/709180 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 34594 event pairs, 894 based on Foata normal form. 13/6337 useless extension candidates. Maximal degree in co-relation 60066. Up to 5792 conditions per place. [2024-06-20 15:43:14,422 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 512 selfloop transitions, 75 changer transitions 0/600 dead transitions. [2024-06-20 15:43:14,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 600 transitions, 9919 flow [2024-06-20 15:43:14,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:43:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:43:14,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-20 15:43:14,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-20 15:43:14,424 INFO L175 Difference]: Start difference. First operand has 247 places, 552 transitions, 8424 flow. Second operand 10 states and 196 transitions. [2024-06-20 15:43:14,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 600 transitions, 9919 flow [2024-06-20 15:43:15,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 600 transitions, 9712 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-20 15:43:15,648 INFO L231 Difference]: Finished difference. Result has 248 places, 555 transitions, 8449 flow [2024-06-20 15:43:15,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8217, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8449, PETRI_PLACES=248, PETRI_TRANSITIONS=555} [2024-06-20 15:43:15,649 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 203 predicate places. [2024-06-20 15:43:15,649 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 555 transitions, 8449 flow [2024-06-20 15:43:15,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:15,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:15,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:15,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 15:43:15,650 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:15,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:15,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1658168905, now seen corresponding path program 2 times [2024-06-20 15:43:15,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:15,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498175850] [2024-06-20 15:43:15,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:15,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:17,015 INFO 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 15:43:17,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:17,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498175850] [2024-06-20 15:43:17,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498175850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:17,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:17,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:43:17,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305135400] [2024-06-20 15:43:17,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:17,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:43:17,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:17,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:43:17,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:43:17,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:43:17,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 555 transitions, 8449 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:17,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:17,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:43:17,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:18,551 INFO L124 PetriNetUnfolderBase]: 4178/6357 cut-off events. [2024-06-20 15:43:18,551 INFO L125 PetriNetUnfolderBase]: For 728804/728848 co-relation queries the response was YES. [2024-06-20 15:43:18,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61072 conditions, 6357 events. 4178/6357 cut-off events. For 728804/728848 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 34669 event pairs, 857 based on Foata normal form. 13/6358 useless extension candidates. Maximal degree in co-relation 60958. Up to 5361 conditions per place. [2024-06-20 15:43:18,635 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 368 selfloop transitions, 217 changer transitions 0/598 dead transitions. [2024-06-20 15:43:18,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 598 transitions, 9893 flow [2024-06-20 15:43:18,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:43:18,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:43:18,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-20 15:43:18,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-20 15:43:18,637 INFO L175 Difference]: Start difference. First operand has 248 places, 555 transitions, 8449 flow. Second operand 10 states and 198 transitions. [2024-06-20 15:43:18,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 598 transitions, 9893 flow [2024-06-20 15:43:19,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 598 transitions, 9685 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-20 15:43:19,910 INFO L231 Difference]: Finished difference. Result has 250 places, 558 transitions, 8759 flow [2024-06-20 15:43:19,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8241, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8759, PETRI_PLACES=250, PETRI_TRANSITIONS=558} [2024-06-20 15:43:19,911 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 205 predicate places. [2024-06-20 15:43:19,911 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 558 transitions, 8759 flow [2024-06-20 15:43:19,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:19,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:19,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:19,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 15:43:19,912 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:19,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:19,912 INFO L85 PathProgramCache]: Analyzing trace with hash -981707190, now seen corresponding path program 2 times [2024-06-20 15:43:19,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:19,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635211557] [2024-06-20 15:43:19,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:19,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:21,082 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 15:43:21,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:21,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635211557] [2024-06-20 15:43:21,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635211557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:21,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:21,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:43:21,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990615415] [2024-06-20 15:43:21,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:21,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:43:21,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:21,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:43:21,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:43:21,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:43:21,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 558 transitions, 8759 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:21,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:21,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:43:21,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:22,736 INFO L124 PetriNetUnfolderBase]: 4266/6494 cut-off events. [2024-06-20 15:43:22,737 INFO L125 PetriNetUnfolderBase]: For 775422/775464 co-relation queries the response was YES. [2024-06-20 15:43:22,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63719 conditions, 6494 events. 4266/6494 cut-off events. For 775422/775464 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 35594 event pairs, 840 based on Foata normal form. 28/6507 useless extension candidates. Maximal degree in co-relation 63604. Up to 4244 conditions per place. [2024-06-20 15:43:22,830 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 241 selfloop transitions, 362 changer transitions 0/616 dead transitions. [2024-06-20 15:43:22,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 616 transitions, 10905 flow [2024-06-20 15:43:22,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:43:22,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:43:22,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-20 15:43:22,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-20 15:43:22,832 INFO L175 Difference]: Start difference. First operand has 250 places, 558 transitions, 8759 flow. Second operand 10 states and 214 transitions. [2024-06-20 15:43:22,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 616 transitions, 10905 flow [2024-06-20 15:43:24,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 616 transitions, 10411 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-20 15:43:24,063 INFO L231 Difference]: Finished difference. Result has 252 places, 567 transitions, 9231 flow [2024-06-20 15:43:24,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8265, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9231, PETRI_PLACES=252, PETRI_TRANSITIONS=567} [2024-06-20 15:43:24,064 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 207 predicate places. [2024-06-20 15:43:24,064 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 567 transitions, 9231 flow [2024-06-20 15:43:24,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:24,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:24,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:24,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 15:43:24,065 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:24,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:24,065 INFO L85 PathProgramCache]: Analyzing trace with hash -981701610, now seen corresponding path program 3 times [2024-06-20 15:43:24,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:24,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651903810] [2024-06-20 15:43:24,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:24,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:25,266 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 15:43:25,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:25,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651903810] [2024-06-20 15:43:25,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651903810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:25,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:25,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:43:25,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19493709] [2024-06-20 15:43:25,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:25,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:43:25,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:25,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:43:25,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:43:25,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:43:25,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 567 transitions, 9231 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:25,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:25,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:43:25,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:27,112 INFO L124 PetriNetUnfolderBase]: 4541/6931 cut-off events. [2024-06-20 15:43:27,112 INFO L125 PetriNetUnfolderBase]: For 817754/817795 co-relation queries the response was YES. [2024-06-20 15:43:27,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67589 conditions, 6931 events. 4541/6931 cut-off events. For 817754/817795 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 38821 event pairs, 1050 based on Foata normal form. 24/6938 useless extension candidates. Maximal degree in co-relation 67473. Up to 5211 conditions per place. [2024-06-20 15:43:27,204 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 372 selfloop transitions, 269 changer transitions 0/654 dead transitions. [2024-06-20 15:43:27,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 654 transitions, 11460 flow [2024-06-20 15:43:27,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:43:27,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:43:27,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-20 15:43:27,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44421487603305787 [2024-06-20 15:43:27,206 INFO L175 Difference]: Start difference. First operand has 252 places, 567 transitions, 9231 flow. Second operand 11 states and 215 transitions. [2024-06-20 15:43:27,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 654 transitions, 11460 flow [2024-06-20 15:43:28,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 654 transitions, 10889 flow, removed 116 selfloop flow, removed 5 redundant places. [2024-06-20 15:43:28,236 INFO L231 Difference]: Finished difference. Result has 261 places, 605 transitions, 9875 flow [2024-06-20 15:43:28,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8785, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9875, PETRI_PLACES=261, PETRI_TRANSITIONS=605} [2024-06-20 15:43:28,237 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 216 predicate places. [2024-06-20 15:43:28,237 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 605 transitions, 9875 flow [2024-06-20 15:43:28,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:28,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:28,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:28,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 15:43:28,237 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:28,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:28,238 INFO L85 PathProgramCache]: Analyzing trace with hash -837609270, now seen corresponding path program 4 times [2024-06-20 15:43:28,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:28,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259169700] [2024-06-20 15:43:28,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:28,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:29,477 INFO 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 15:43:29,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:29,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259169700] [2024-06-20 15:43:29,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259169700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:29,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:29,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:43:29,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641893756] [2024-06-20 15:43:29,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:29,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:43:29,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:29,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:43:29,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:43:29,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:43:29,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 605 transitions, 9875 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:29,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:29,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:43:29,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:31,190 INFO L124 PetriNetUnfolderBase]: 4595/7017 cut-off events. [2024-06-20 15:43:31,190 INFO L125 PetriNetUnfolderBase]: For 846431/846472 co-relation queries the response was YES. [2024-06-20 15:43:31,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69581 conditions, 7017 events. 4595/7017 cut-off events. For 846431/846472 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 39381 event pairs, 1052 based on Foata normal form. 24/7024 useless extension candidates. Maximal degree in co-relation 69460. Up to 5257 conditions per place. [2024-06-20 15:43:31,280 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 408 selfloop transitions, 244 changer transitions 0/665 dead transitions. [2024-06-20 15:43:31,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 665 transitions, 12105 flow [2024-06-20 15:43:31,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:43:31,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:43:31,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-20 15:43:31,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44834710743801653 [2024-06-20 15:43:31,282 INFO L175 Difference]: Start difference. First operand has 261 places, 605 transitions, 9875 flow. Second operand 11 states and 217 transitions. [2024-06-20 15:43:31,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 665 transitions, 12105 flow [2024-06-20 15:43:32,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 665 transitions, 11720 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 15:43:32,640 INFO L231 Difference]: Finished difference. Result has 269 places, 613 transitions, 10194 flow [2024-06-20 15:43:32,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9496, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10194, PETRI_PLACES=269, PETRI_TRANSITIONS=613} [2024-06-20 15:43:32,641 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 224 predicate places. [2024-06-20 15:43:32,641 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 613 transitions, 10194 flow [2024-06-20 15:43:32,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:32,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:32,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:32,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 15:43:32,642 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:32,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:32,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1514278375, now seen corresponding path program 3 times [2024-06-20 15:43:32,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:32,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838634548] [2024-06-20 15:43:32,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:32,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:33,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:33,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838634548] [2024-06-20 15:43:33,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838634548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:33,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:33,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:43:33,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762505394] [2024-06-20 15:43:33,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:33,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:43:33,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:33,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:43:33,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:43:34,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:43:34,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 613 transitions, 10194 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:34,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:34,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:43:34,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:35,678 INFO L124 PetriNetUnfolderBase]: 4615/7029 cut-off events. [2024-06-20 15:43:35,678 INFO L125 PetriNetUnfolderBase]: For 868284/868303 co-relation queries the response was YES. [2024-06-20 15:43:35,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70375 conditions, 7029 events. 4615/7029 cut-off events. For 868284/868303 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 39233 event pairs, 873 based on Foata normal form. 6/7024 useless extension candidates. Maximal degree in co-relation 70251. Up to 5970 conditions per place. [2024-06-20 15:43:35,774 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 428 selfloop transitions, 217 changer transitions 0/658 dead transitions. [2024-06-20 15:43:35,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 658 transitions, 11815 flow [2024-06-20 15:43:35,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:43:35,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:43:35,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-20 15:43:35,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-20 15:43:35,776 INFO L175 Difference]: Start difference. First operand has 269 places, 613 transitions, 10194 flow. Second operand 10 states and 196 transitions. [2024-06-20 15:43:35,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 658 transitions, 11815 flow [2024-06-20 15:43:37,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 658 transitions, 11499 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-20 15:43:37,635 INFO L231 Difference]: Finished difference. Result has 274 places, 616 transitions, 10405 flow [2024-06-20 15:43:37,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9878, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10405, PETRI_PLACES=274, PETRI_TRANSITIONS=616} [2024-06-20 15:43:37,636 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 229 predicate places. [2024-06-20 15:43:37,636 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 616 transitions, 10405 flow [2024-06-20 15:43:37,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:37,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:37,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:37,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 15:43:37,637 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:37,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:37,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1514278220, now seen corresponding path program 5 times [2024-06-20 15:43:37,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:37,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553118710] [2024-06-20 15:43:37,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:37,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:38,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:38,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553118710] [2024-06-20 15:43:38,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553118710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:38,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:38,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:43:38,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497496169] [2024-06-20 15:43:38,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:38,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:43:38,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:38,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:43:38,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:43:38,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:43:38,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 616 transitions, 10405 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:38,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:38,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:43:38,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:40,549 INFO L124 PetriNetUnfolderBase]: 4693/7148 cut-off events. [2024-06-20 15:43:40,549 INFO L125 PetriNetUnfolderBase]: For 916526/916565 co-relation queries the response was YES. [2024-06-20 15:43:40,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72217 conditions, 7148 events. 4693/7148 cut-off events. For 916526/916565 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 40045 event pairs, 845 based on Foata normal form. 30/7163 useless extension candidates. Maximal degree in co-relation 72092. Up to 4545 conditions per place. [2024-06-20 15:43:40,666 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 304 selfloop transitions, 366 changer transitions 0/683 dead transitions. [2024-06-20 15:43:40,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 683 transitions, 13043 flow [2024-06-20 15:43:40,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:43:40,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:43:40,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-20 15:43:40,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-20 15:43:40,667 INFO L175 Difference]: Start difference. First operand has 274 places, 616 transitions, 10405 flow. Second operand 10 states and 214 transitions. [2024-06-20 15:43:40,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 683 transitions, 13043 flow [2024-06-20 15:43:43,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 683 transitions, 12542 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-20 15:43:43,077 INFO L231 Difference]: Finished difference. Result has 276 places, 625 transitions, 10849 flow [2024-06-20 15:43:43,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9904, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10849, PETRI_PLACES=276, PETRI_TRANSITIONS=625} [2024-06-20 15:43:43,078 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 231 predicate places. [2024-06-20 15:43:43,078 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 625 transitions, 10849 flow [2024-06-20 15:43:43,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:43,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:43,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:43,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 15:43:43,079 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:43,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:43,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1514272640, now seen corresponding path program 6 times [2024-06-20 15:43:43,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:43,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21004143] [2024-06-20 15:43:43,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:43,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:44,200 INFO 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 15:43:44,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:44,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21004143] [2024-06-20 15:43:44,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21004143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:44,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:44,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:43:44,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972786487] [2024-06-20 15:43:44,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:44,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:43:44,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:44,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:43:44,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:43:44,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:43:44,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 625 transitions, 10849 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:44,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:44,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:43:44,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:46,202 INFO L124 PetriNetUnfolderBase]: 4672/7129 cut-off events. [2024-06-20 15:43:46,203 INFO L125 PetriNetUnfolderBase]: For 932131/932152 co-relation queries the response was YES. [2024-06-20 15:43:46,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72824 conditions, 7129 events. 4672/7129 cut-off events. For 932131/932152 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 40136 event pairs, 1081 based on Foata normal form. 4/7116 useless extension candidates. Maximal degree in co-relation 72698. Up to 5362 conditions per place. [2024-06-20 15:43:46,292 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 424 selfloop transitions, 240 changer transitions 0/677 dead transitions. [2024-06-20 15:43:46,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 677 transitions, 12744 flow [2024-06-20 15:43:46,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:43:46,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:43:46,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-20 15:43:46,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45041322314049587 [2024-06-20 15:43:46,294 INFO L175 Difference]: Start difference. First operand has 276 places, 625 transitions, 10849 flow. Second operand 11 states and 218 transitions. [2024-06-20 15:43:46,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 677 transitions, 12744 flow [2024-06-20 15:43:48,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 677 transitions, 12084 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-20 15:43:48,273 INFO L231 Difference]: Finished difference. Result has 282 places, 626 transitions, 10697 flow [2024-06-20 15:43:48,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10190, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10697, PETRI_PLACES=282, PETRI_TRANSITIONS=626} [2024-06-20 15:43:48,274 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 237 predicate places. [2024-06-20 15:43:48,274 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 626 transitions, 10697 flow [2024-06-20 15:43:48,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:48,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:48,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:48,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 15:43:48,274 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:48,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:48,275 INFO L85 PathProgramCache]: Analyzing trace with hash 214610024, now seen corresponding path program 7 times [2024-06-20 15:43:48,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:48,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752795213] [2024-06-20 15:43:48,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:48,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:49,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:49,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752795213] [2024-06-20 15:43:49,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752795213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:49,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:49,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:43:49,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115872087] [2024-06-20 15:43:49,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:49,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:43:49,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:49,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:43:49,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:43:49,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:43:49,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 626 transitions, 10697 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:49,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:49,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:43:49,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:51,619 INFO L124 PetriNetUnfolderBase]: 4768/7265 cut-off events. [2024-06-20 15:43:51,619 INFO L125 PetriNetUnfolderBase]: For 977683/977720 co-relation queries the response was YES. [2024-06-20 15:43:51,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74262 conditions, 7265 events. 4768/7265 cut-off events. For 977683/977720 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 40997 event pairs, 1092 based on Foata normal form. 24/7274 useless extension candidates. Maximal degree in co-relation 74134. Up to 5445 conditions per place. [2024-06-20 15:43:51,724 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 452 selfloop transitions, 236 changer transitions 0/701 dead transitions. [2024-06-20 15:43:51,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 701 transitions, 13526 flow [2024-06-20 15:43:51,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:43:51,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:43:51,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-20 15:43:51,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607438016528926 [2024-06-20 15:43:51,726 INFO L175 Difference]: Start difference. First operand has 282 places, 626 transitions, 10697 flow. Second operand 11 states and 223 transitions. [2024-06-20 15:43:51,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 701 transitions, 13526 flow [2024-06-20 15:43:53,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 701 transitions, 13012 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 15:43:53,978 INFO L231 Difference]: Finished difference. Result has 287 places, 637 transitions, 10971 flow [2024-06-20 15:43:53,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10201, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10971, PETRI_PLACES=287, PETRI_TRANSITIONS=637} [2024-06-20 15:43:53,979 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 242 predicate places. [2024-06-20 15:43:53,979 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 637 transitions, 10971 flow [2024-06-20 15:43:53,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:53,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:53,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:53,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 15:43:53,980 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:53,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:53,980 INFO L85 PathProgramCache]: Analyzing trace with hash 214408214, now seen corresponding path program 8 times [2024-06-20 15:43:53,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:53,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177866409] [2024-06-20 15:43:53,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:53,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:55,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:55,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177866409] [2024-06-20 15:43:55,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177866409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:55,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:55,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:43:55,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52324211] [2024-06-20 15:43:55,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:55,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:43:55,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:55,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:43:55,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:43:55,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:43:55,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 637 transitions, 10971 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:55,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:55,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:43:55,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:56,939 INFO L124 PetriNetUnfolderBase]: 4790/7302 cut-off events. [2024-06-20 15:43:56,939 INFO L125 PetriNetUnfolderBase]: For 1006176/1006193 co-relation queries the response was YES. [2024-06-20 15:43:57,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75071 conditions, 7302 events. 4790/7302 cut-off events. For 1006176/1006193 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 41287 event pairs, 1090 based on Foata normal form. 4/7291 useless extension candidates. Maximal degree in co-relation 74940. Up to 5464 conditions per place. [2024-06-20 15:43:57,053 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 442 selfloop transitions, 246 changer transitions 0/701 dead transitions. [2024-06-20 15:43:57,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 701 transitions, 13612 flow [2024-06-20 15:43:57,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:43:57,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:43:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-20 15:43:57,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45867768595041325 [2024-06-20 15:43:57,055 INFO L175 Difference]: Start difference. First operand has 287 places, 637 transitions, 10971 flow. Second operand 11 states and 222 transitions. [2024-06-20 15:43:57,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 701 transitions, 13612 flow [2024-06-20 15:43:59,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 701 transitions, 13254 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 15:43:59,487 INFO L231 Difference]: Finished difference. Result has 294 places, 641 transitions, 11211 flow [2024-06-20 15:43:59,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10622, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11211, PETRI_PLACES=294, PETRI_TRANSITIONS=641} [2024-06-20 15:43:59,488 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 249 predicate places. [2024-06-20 15:43:59,488 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 641 transitions, 11211 flow [2024-06-20 15:43:59,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:59,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:59,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:59,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 15:43:59,489 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:59,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:59,489 INFO L85 PathProgramCache]: Analyzing trace with hash 214402634, now seen corresponding path program 9 times [2024-06-20 15:43:59,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:59,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774448308] [2024-06-20 15:43:59,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:59,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:00,586 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 15:44:00,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:00,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774448308] [2024-06-20 15:44:00,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774448308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:00,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:00,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:44:00,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836833128] [2024-06-20 15:44:00,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:00,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:44:00,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:00,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:44:00,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:44:00,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:44:00,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 641 transitions, 11211 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:00,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:00,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:44:00,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:02,401 INFO L124 PetriNetUnfolderBase]: 4803/7316 cut-off events. [2024-06-20 15:44:02,401 INFO L125 PetriNetUnfolderBase]: For 1035607/1035644 co-relation queries the response was YES. [2024-06-20 15:44:02,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75420 conditions, 7316 events. 4803/7316 cut-off events. For 1035607/1035644 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 41250 event pairs, 868 based on Foata normal form. 28/7330 useless extension candidates. Maximal degree in co-relation 75287. Up to 4640 conditions per place. [2024-06-20 15:44:02,509 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 323 selfloop transitions, 373 changer transitions 0/709 dead transitions. [2024-06-20 15:44:02,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 709 transitions, 13925 flow [2024-06-20 15:44:02,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:44:02,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:44:02,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-20 15:44:02,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-20 15:44:02,510 INFO L175 Difference]: Start difference. First operand has 294 places, 641 transitions, 11211 flow. Second operand 10 states and 212 transitions. [2024-06-20 15:44:02,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 709 transitions, 13925 flow [2024-06-20 15:44:04,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 709 transitions, 13368 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-20 15:44:04,857 INFO L231 Difference]: Finished difference. Result has 296 places, 644 transitions, 11483 flow [2024-06-20 15:44:04,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10654, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11483, PETRI_PLACES=296, PETRI_TRANSITIONS=644} [2024-06-20 15:44:04,857 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 251 predicate places. [2024-06-20 15:44:04,858 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 644 transitions, 11483 flow [2024-06-20 15:44:04,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:04,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:04,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:04,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 15:44:04,858 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:04,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:04,859 INFO L85 PathProgramCache]: Analyzing trace with hash 214402479, now seen corresponding path program 4 times [2024-06-20 15:44:04,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:04,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279436797] [2024-06-20 15:44:04,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:04,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:04,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:06,301 INFO 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 15:44:06,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:06,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279436797] [2024-06-20 15:44:06,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279436797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:06,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:06,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:44:06,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062015959] [2024-06-20 15:44:06,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:06,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:44:06,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:06,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:44:06,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:44:06,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:44:06,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 644 transitions, 11483 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:06,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:06,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:44:06,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:08,279 INFO L124 PetriNetUnfolderBase]: 4812/7332 cut-off events. [2024-06-20 15:44:08,279 INFO L125 PetriNetUnfolderBase]: For 1050793/1050830 co-relation queries the response was YES. [2024-06-20 15:44:08,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76424 conditions, 7332 events. 4812/7332 cut-off events. For 1050793/1050830 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 41341 event pairs, 898 based on Foata normal form. 9/7330 useless extension candidates. Maximal degree in co-relation 76290. Up to 6256 conditions per place. [2024-06-20 15:44:08,386 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 464 selfloop transitions, 211 changer transitions 0/688 dead transitions. [2024-06-20 15:44:08,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 688 transitions, 13198 flow [2024-06-20 15:44:08,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:44:08,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:44:08,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-20 15:44:08,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-20 15:44:08,388 INFO L175 Difference]: Start difference. First operand has 296 places, 644 transitions, 11483 flow. Second operand 10 states and 194 transitions. [2024-06-20 15:44:08,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 688 transitions, 13198 flow [2024-06-20 15:44:10,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 688 transitions, 12043 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-20 15:44:10,634 INFO L231 Difference]: Finished difference. Result has 297 places, 647 transitions, 10849 flow [2024-06-20 15:44:10,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10328, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10849, PETRI_PLACES=297, PETRI_TRANSITIONS=647} [2024-06-20 15:44:10,635 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 252 predicate places. [2024-06-20 15:44:10,635 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 647 transitions, 10849 flow [2024-06-20 15:44:10,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:10,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:10,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:10,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 15:44:10,636 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:10,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:10,636 INFO L85 PathProgramCache]: Analyzing trace with hash 221759864, now seen corresponding path program 10 times [2024-06-20 15:44:10,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:10,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180808624] [2024-06-20 15:44:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:10,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:11,855 INFO 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 15:44:11,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:11,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180808624] [2024-06-20 15:44:11,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180808624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:11,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:11,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:44:11,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822683609] [2024-06-20 15:44:11,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:11,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:44:11,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:11,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:44:11,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:44:12,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:44:12,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 647 transitions, 10849 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:12,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:12,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:44:12,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:13,821 INFO L124 PetriNetUnfolderBase]: 4803/7327 cut-off events. [2024-06-20 15:44:13,821 INFO L125 PetriNetUnfolderBase]: For 1066306/1066343 co-relation queries the response was YES. [2024-06-20 15:44:13,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75558 conditions, 7327 events. 4803/7327 cut-off events. For 1066306/1066343 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 41503 event pairs, 1093 based on Foata normal form. 24/7336 useless extension candidates. Maximal degree in co-relation 75423. Up to 5496 conditions per place. [2024-06-20 15:44:13,936 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 432 selfloop transitions, 255 changer transitions 0/700 dead transitions. [2024-06-20 15:44:13,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 700 transitions, 12849 flow [2024-06-20 15:44:13,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:44:13,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:44:13,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-20 15:44:13,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44421487603305787 [2024-06-20 15:44:13,937 INFO L175 Difference]: Start difference. First operand has 297 places, 647 transitions, 10849 flow. Second operand 11 states and 215 transitions. [2024-06-20 15:44:13,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 700 transitions, 12849 flow [2024-06-20 15:44:16,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 700 transitions, 12314 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-20 15:44:16,524 INFO L231 Difference]: Finished difference. Result has 301 places, 648 transitions, 10850 flow [2024-06-20 15:44:16,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10314, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10850, PETRI_PLACES=301, PETRI_TRANSITIONS=648} [2024-06-20 15:44:16,525 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 256 predicate places. [2024-06-20 15:44:16,525 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 648 transitions, 10850 flow [2024-06-20 15:44:16,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:16,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:16,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:16,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 15:44:16,526 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:16,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:16,526 INFO L85 PathProgramCache]: Analyzing trace with hash 222036911, now seen corresponding path program 1 times [2024-06-20 15:44:16,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:16,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719054097] [2024-06-20 15:44:16,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:16,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:17,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:17,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719054097] [2024-06-20 15:44:17,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719054097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:17,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:17,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:44:17,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133775148] [2024-06-20 15:44:17,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:17,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:44:17,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:17,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:44:17,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:44:18,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:44:18,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 648 transitions, 10850 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:18,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:18,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:44:18,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:19,923 INFO L124 PetriNetUnfolderBase]: 5250/7907 cut-off events. [2024-06-20 15:44:19,923 INFO L125 PetriNetUnfolderBase]: For 1143306/1143406 co-relation queries the response was YES. [2024-06-20 15:44:20,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79984 conditions, 7907 events. 5250/7907 cut-off events. For 1143306/1143406 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 43723 event pairs, 1189 based on Foata normal form. 39/7857 useless extension candidates. Maximal degree in co-relation 79847. Up to 7055 conditions per place. [2024-06-20 15:44:20,047 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 513 selfloop transitions, 99 changer transitions 0/694 dead transitions. [2024-06-20 15:44:20,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 694 transitions, 12532 flow [2024-06-20 15:44:20,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:44:20,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:44:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-20 15:44:20,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-20 15:44:20,049 INFO L175 Difference]: Start difference. First operand has 301 places, 648 transitions, 10850 flow. Second operand 9 states and 177 transitions. [2024-06-20 15:44:20,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 694 transitions, 12532 flow [2024-06-20 15:44:22,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 694 transitions, 12090 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:44:22,127 INFO L231 Difference]: Finished difference. Result has 304 places, 659 transitions, 10895 flow [2024-06-20 15:44:22,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10420, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10895, PETRI_PLACES=304, PETRI_TRANSITIONS=659} [2024-06-20 15:44:22,128 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 259 predicate places. [2024-06-20 15:44:22,128 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 659 transitions, 10895 flow [2024-06-20 15:44:22,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:22,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:22,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:22,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 15:44:22,129 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 15:44:22,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:22,129 INFO L85 PathProgramCache]: Analyzing trace with hash 478128407, now seen corresponding path program 1 times [2024-06-20 15:44:22,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:22,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853051153] [2024-06-20 15:44:22,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:22,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:23,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:23,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853051153] [2024-06-20 15:44:23,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853051153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:23,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:23,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:44:23,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566793023] [2024-06-20 15:44:23,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:23,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:44:23,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:23,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:44:23,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:44:23,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:44:23,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 659 transitions, 10895 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 15:44:23,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:23,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:44:23,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:25,097 INFO L124 PetriNetUnfolderBase]: 5147/7778 cut-off events. [2024-06-20 15:44:25,097 INFO L125 PetriNetUnfolderBase]: For 1223659/1223826 co-relation queries the response was YES. [2024-06-20 15:44:25,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80564 conditions, 7778 events. 5147/7778 cut-off events. For 1223659/1223826 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 43006 event pairs, 1312 based on Foata normal form. 50/7722 useless extension candidates. Maximal degree in co-relation 80425. Up to 7075 conditions per place. [2024-06-20 15:44:25,211 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 508 selfloop transitions, 37 changer transitions 0/682 dead transitions. [2024-06-20 15:44:25,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 682 transitions, 12295 flow [2024-06-20 15:44:25,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:44:25,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:44:25,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 15:44:25,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-20 15:44:25,212 INFO L175 Difference]: Start difference. First operand has 304 places, 659 transitions, 10895 flow. Second operand 8 states and 145 transitions. [2024-06-20 15:44:25,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 682 transitions, 12295 flow [2024-06-20 15:44:27,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 682 transitions, 12039 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-20 15:44:27,495 INFO L231 Difference]: Finished difference. Result has 306 places, 665 transitions, 10815 flow [2024-06-20 15:44:27,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10639, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10815, PETRI_PLACES=306, PETRI_TRANSITIONS=665} [2024-06-20 15:44:27,496 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 261 predicate places. [2024-06-20 15:44:27,496 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 665 transitions, 10815 flow [2024-06-20 15:44:27,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 15:44:27,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:27,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:27,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 15:44:27,497 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:27,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:27,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1104122752, now seen corresponding path program 11 times [2024-06-20 15:44:27,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:27,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947931973] [2024-06-20 15:44:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:27,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:28,412 INFO 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 15:44:28,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:28,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947931973] [2024-06-20 15:44:28,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947931973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:28,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:28,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:44:28,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813409301] [2024-06-20 15:44:28,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:28,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:44:28,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:28,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:44:28,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:44:28,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:44:28,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 665 transitions, 10815 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:28,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:28,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:44:28,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:31,244 INFO L124 PetriNetUnfolderBase]: 6270/9558 cut-off events. [2024-06-20 15:44:31,244 INFO L125 PetriNetUnfolderBase]: For 1244844/1244896 co-relation queries the response was YES. [2024-06-20 15:44:31,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91536 conditions, 9558 events. 6270/9558 cut-off events. For 1244844/1244896 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 56990 event pairs, 1067 based on Foata normal form. 28/9564 useless extension candidates. Maximal degree in co-relation 91396. Up to 6430 conditions per place. [2024-06-20 15:44:31,389 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 529 selfloop transitions, 511 changer transitions 0/1056 dead transitions. [2024-06-20 15:44:31,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 1056 transitions, 17523 flow [2024-06-20 15:44:31,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:44:31,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:44:31,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-20 15:44:31,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855371900826446 [2024-06-20 15:44:31,390 INFO L175 Difference]: Start difference. First operand has 306 places, 665 transitions, 10815 flow. Second operand 11 states and 235 transitions. [2024-06-20 15:44:31,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 1056 transitions, 17523 flow [2024-06-20 15:44:34,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 1056 transitions, 17453 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 15:44:34,191 INFO L231 Difference]: Finished difference. Result has 317 places, 944 transitions, 15319 flow [2024-06-20 15:44:34,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10745, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15319, PETRI_PLACES=317, PETRI_TRANSITIONS=944} [2024-06-20 15:44:34,192 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 272 predicate places. [2024-06-20 15:44:34,192 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 944 transitions, 15319 flow [2024-06-20 15:44:34,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:34,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:34,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:34,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 15:44:34,193 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 15:44:34,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:34,193 INFO L85 PathProgramCache]: Analyzing trace with hash 478516682, now seen corresponding path program 1 times [2024-06-20 15:44:34,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:34,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423043727] [2024-06-20 15:44:34,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:34,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:35,176 INFO 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 15:44:35,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:35,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423043727] [2024-06-20 15:44:35,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423043727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:35,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:35,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:44:35,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277189234] [2024-06-20 15:44:35,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:35,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:44:35,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:35,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:44:35,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:44:35,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 15:44:35,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 944 transitions, 15319 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:35,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:35,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 15:44:35,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:37,582 INFO L124 PetriNetUnfolderBase]: 6297/9381 cut-off events. [2024-06-20 15:44:37,582 INFO L125 PetriNetUnfolderBase]: For 1584831/1585827 co-relation queries the response was YES. [2024-06-20 15:44:37,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97718 conditions, 9381 events. 6297/9381 cut-off events. For 1584831/1585827 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 52922 event pairs, 1266 based on Foata normal form. 530/9526 useless extension candidates. Maximal degree in co-relation 97572. Up to 8276 conditions per place. [2024-06-20 15:44:37,732 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 719 selfloop transitions, 37 changer transitions 0/972 dead transitions. [2024-06-20 15:44:37,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 972 transitions, 17149 flow [2024-06-20 15:44:37,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:44:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:44:37,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-20 15:44:37,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-20 15:44:37,734 INFO L175 Difference]: Start difference. First operand has 317 places, 944 transitions, 15319 flow. Second operand 7 states and 143 transitions. [2024-06-20 15:44:37,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 972 transitions, 17149 flow [2024-06-20 15:44:40,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 972 transitions, 17032 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-20 15:44:40,895 INFO L231 Difference]: Finished difference. Result has 322 places, 953 transitions, 15403 flow [2024-06-20 15:44:40,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15202, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=944, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=910, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15403, PETRI_PLACES=322, PETRI_TRANSITIONS=953} [2024-06-20 15:44:40,896 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 277 predicate places. [2024-06-20 15:44:40,896 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 953 transitions, 15403 flow [2024-06-20 15:44:40,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:40,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:40,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:40,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 15:44:40,897 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 15:44:40,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:40,897 INFO L85 PathProgramCache]: Analyzing trace with hash 478516217, now seen corresponding path program 2 times [2024-06-20 15:44:40,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:40,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631089359] [2024-06-20 15:44:40,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:40,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:41,842 INFO 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 15:44:41,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:41,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631089359] [2024-06-20 15:44:41,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631089359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:41,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:41,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:44:41,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651252011] [2024-06-20 15:44:41,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:41,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:44:41,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:41,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:44:41,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:44:41,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:44:41,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 953 transitions, 15403 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 15:44:41,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:41,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:44:41,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:44,322 INFO L124 PetriNetUnfolderBase]: 6662/9984 cut-off events. [2024-06-20 15:44:44,322 INFO L125 PetriNetUnfolderBase]: For 1512933/1513234 co-relation queries the response was YES. [2024-06-20 15:44:44,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102785 conditions, 9984 events. 6662/9984 cut-off events. For 1512933/1513234 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 56998 event pairs, 1358 based on Foata normal form. 127/9940 useless extension candidates. Maximal degree in co-relation 102636. Up to 9008 conditions per place. [2024-06-20 15:44:44,529 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 778 selfloop transitions, 59 changer transitions 0/980 dead transitions. [2024-06-20 15:44:44,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 980 transitions, 17634 flow [2024-06-20 15:44:44,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:44:44,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:44:44,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-20 15:44:44,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-20 15:44:44,530 INFO L175 Difference]: Start difference. First operand has 322 places, 953 transitions, 15403 flow. Second operand 7 states and 134 transitions. [2024-06-20 15:44:44,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 980 transitions, 17634 flow [2024-06-20 15:44:48,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 980 transitions, 17582 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-20 15:44:48,482 INFO L231 Difference]: Finished difference. Result has 327 places, 962 transitions, 15634 flow [2024-06-20 15:44:48,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15351, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=953, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=900, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15634, PETRI_PLACES=327, PETRI_TRANSITIONS=962} [2024-06-20 15:44:48,483 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 282 predicate places. [2024-06-20 15:44:48,484 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 962 transitions, 15634 flow [2024-06-20 15:44:48,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 15:44:48,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:48,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:48,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 15:44:48,484 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:48,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:48,485 INFO L85 PathProgramCache]: Analyzing trace with hash 453882941, now seen corresponding path program 2 times [2024-06-20 15:44:48,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:48,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005465808] [2024-06-20 15:44:48,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:48,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:49,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:49,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005465808] [2024-06-20 15:44:49,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005465808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:49,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:49,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:44:49,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712870651] [2024-06-20 15:44:49,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:49,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:44:49,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:49,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:44:49,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:44:50,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:44:50,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 962 transitions, 15634 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:50,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:50,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:44:50,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:53,196 INFO L124 PetriNetUnfolderBase]: 7095/10541 cut-off events. [2024-06-20 15:44:53,196 INFO L125 PetriNetUnfolderBase]: For 1472537/1472861 co-relation queries the response was YES. [2024-06-20 15:44:53,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105403 conditions, 10541 events. 7095/10541 cut-off events. For 1472537/1472861 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 60166 event pairs, 1929 based on Foata normal form. 213/10612 useless extension candidates. Maximal degree in co-relation 105251. Up to 9830 conditions per place. [2024-06-20 15:44:53,364 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 869 selfloop transitions, 33 changer transitions 0/994 dead transitions. [2024-06-20 15:44:53,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 994 transitions, 17682 flow [2024-06-20 15:44:53,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:44:53,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:44:53,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-20 15:44:53,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068181818181818 [2024-06-20 15:44:53,366 INFO L175 Difference]: Start difference. First operand has 327 places, 962 transitions, 15634 flow. Second operand 10 states and 179 transitions. [2024-06-20 15:44:53,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 994 transitions, 17682 flow [2024-06-20 15:44:57,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 994 transitions, 17591 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-20 15:44:57,957 INFO L231 Difference]: Finished difference. Result has 335 places, 964 transitions, 15696 flow [2024-06-20 15:44:57,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15543, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=962, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=929, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15696, PETRI_PLACES=335, PETRI_TRANSITIONS=964} [2024-06-20 15:44:57,958 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 290 predicate places. [2024-06-20 15:44:57,958 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 964 transitions, 15696 flow [2024-06-20 15:44:57,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:57,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:57,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:57,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 15:44:57,958 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:57,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:57,959 INFO L85 PathProgramCache]: Analyzing trace with hash 546709730, now seen corresponding path program 1 times [2024-06-20 15:44:57,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:57,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466191485] [2024-06-20 15:44:57,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:57,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:59,190 INFO 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 15:44:59,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:59,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466191485] [2024-06-20 15:44:59,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466191485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:59,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:59,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:44:59,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597236576] [2024-06-20 15:44:59,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:59,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:44:59,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:59,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:44:59,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:44:59,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-20 15:44:59,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 964 transitions, 15696 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:59,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:59,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-20 15:44:59,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:02,465 INFO L124 PetriNetUnfolderBase]: 7518/11087 cut-off events. [2024-06-20 15:45:02,465 INFO L125 PetriNetUnfolderBase]: For 1445311/1445319 co-relation queries the response was YES. [2024-06-20 15:45:02,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109688 conditions, 11087 events. 7518/11087 cut-off events. For 1445311/1445319 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 62214 event pairs, 2171 based on Foata normal form. 2/11076 useless extension candidates. Maximal degree in co-relation 109534. Up to 10702 conditions per place. [2024-06-20 15:45:02,680 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 951 selfloop transitions, 46 changer transitions 0/1013 dead transitions. [2024-06-20 15:45:02,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1013 transitions, 18221 flow [2024-06-20 15:45:02,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:45:02,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:45:02,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 15:45:02,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065656565656566 [2024-06-20 15:45:02,681 INFO L175 Difference]: Start difference. First operand has 335 places, 964 transitions, 15696 flow. Second operand 9 states and 161 transitions. [2024-06-20 15:45:02,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1013 transitions, 18221 flow [2024-06-20 15:45:07,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 1013 transitions, 18090 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-20 15:45:07,027 INFO L231 Difference]: Finished difference. Result has 336 places, 980 transitions, 16028 flow [2024-06-20 15:45:07,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15565, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=964, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=918, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16028, PETRI_PLACES=336, PETRI_TRANSITIONS=980} [2024-06-20 15:45:07,028 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 291 predicate places. [2024-06-20 15:45:07,028 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 980 transitions, 16028 flow [2024-06-20 15:45:07,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:07,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:07,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:07,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 15:45:07,028 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:07,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:07,029 INFO L85 PathProgramCache]: Analyzing trace with hash 862582711, now seen corresponding path program 3 times [2024-06-20 15:45:07,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:07,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9582403] [2024-06-20 15:45:07,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:07,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:08,603 INFO 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 15:45:08,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:08,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9582403] [2024-06-20 15:45:08,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9582403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:08,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:08,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:45:08,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218445562] [2024-06-20 15:45:08,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:08,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:45:08,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:08,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:45:08,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:45:08,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:45:08,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 980 transitions, 16028 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:08,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:08,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:45:08,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:11,796 INFO L124 PetriNetUnfolderBase]: 7127/10599 cut-off events. [2024-06-20 15:45:11,796 INFO L125 PetriNetUnfolderBase]: For 1503729/1504061 co-relation queries the response was YES. [2024-06-20 15:45:11,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106384 conditions, 10599 events. 7127/10599 cut-off events. For 1503729/1504061 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 60668 event pairs, 1912 based on Foata normal form. 225/10692 useless extension candidates. Maximal degree in co-relation 106229. Up to 9893 conditions per place. [2024-06-20 15:45:11,960 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 890 selfloop transitions, 22 changer transitions 0/1010 dead transitions. [2024-06-20 15:45:11,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1010 transitions, 18074 flow [2024-06-20 15:45:11,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:45:11,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:45:11,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-20 15:45:11,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40454545454545454 [2024-06-20 15:45:11,961 INFO L175 Difference]: Start difference. First operand has 336 places, 980 transitions, 16028 flow. Second operand 10 states and 178 transitions. [2024-06-20 15:45:11,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1010 transitions, 18074 flow [2024-06-20 15:45:16,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 1010 transitions, 17941 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-20 15:45:16,196 INFO L231 Difference]: Finished difference. Result has 339 places, 982 transitions, 16030 flow [2024-06-20 15:45:16,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15895, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=980, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=958, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16030, PETRI_PLACES=339, PETRI_TRANSITIONS=982} [2024-06-20 15:45:16,198 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 294 predicate places. [2024-06-20 15:45:16,198 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 982 transitions, 16030 flow [2024-06-20 15:45:16,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:16,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:16,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:16,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 15:45:16,198 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:16,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:16,199 INFO L85 PathProgramCache]: Analyzing trace with hash 537178594, now seen corresponding path program 12 times [2024-06-20 15:45:16,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:16,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31149540] [2024-06-20 15:45:16,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:16,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:17,401 INFO 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 15:45:17,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:17,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31149540] [2024-06-20 15:45:17,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31149540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:17,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:17,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:45:17,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085600292] [2024-06-20 15:45:17,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:17,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:45:17,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:17,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:45:17,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:45:17,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:45:17,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 982 transitions, 16030 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:17,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:17,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:45:17,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:20,413 INFO L124 PetriNetUnfolderBase]: 6397/9761 cut-off events. [2024-06-20 15:45:20,413 INFO L125 PetriNetUnfolderBase]: For 1462749/1462787 co-relation queries the response was YES. [2024-06-20 15:45:20,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101208 conditions, 9761 events. 6397/9761 cut-off events. For 1462749/1462787 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 58475 event pairs, 1662 based on Foata normal form. 22/9774 useless extension candidates. Maximal degree in co-relation 101052. Up to 8888 conditions per place. [2024-06-20 15:45:20,563 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 937 selfloop transitions, 80 changer transitions 0/1036 dead transitions. [2024-06-20 15:45:20,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1036 transitions, 18663 flow [2024-06-20 15:45:20,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:45:20,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:45:20,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-20 15:45:20,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-20 15:45:20,565 INFO L175 Difference]: Start difference. First operand has 339 places, 982 transitions, 16030 flow. Second operand 11 states and 198 transitions. [2024-06-20 15:45:20,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1036 transitions, 18663 flow [2024-06-20 15:45:24,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 1036 transitions, 18550 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-20 15:45:24,897 INFO L231 Difference]: Finished difference. Result has 343 places, 993 transitions, 16411 flow [2024-06-20 15:45:24,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15917, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=982, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=902, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16411, PETRI_PLACES=343, PETRI_TRANSITIONS=993} [2024-06-20 15:45:24,898 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-20 15:45:24,898 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 993 transitions, 16411 flow [2024-06-20 15:45:24,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:24,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:24,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:24,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 15:45:24,899 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:24,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:24,900 INFO L85 PathProgramCache]: Analyzing trace with hash 289017216, now seen corresponding path program 13 times [2024-06-20 15:45:24,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:24,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679818193] [2024-06-20 15:45:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:24,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:26,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:26,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679818193] [2024-06-20 15:45:26,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679818193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:26,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:26,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:45:26,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324472896] [2024-06-20 15:45:26,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:26,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:45:26,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:26,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:45:26,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:45:26,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:45:26,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 993 transitions, 16411 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:26,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:26,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:45:26,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:29,123 INFO L124 PetriNetUnfolderBase]: 6447/9835 cut-off events. [2024-06-20 15:45:29,123 INFO L125 PetriNetUnfolderBase]: For 1488388/1488396 co-relation queries the response was YES. [2024-06-20 15:45:29,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102540 conditions, 9835 events. 6447/9835 cut-off events. For 1488388/1488396 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 59116 event pairs, 1666 based on Foata normal form. 8/9834 useless extension candidates. Maximal degree in co-relation 102383. Up to 8499 conditions per place. [2024-06-20 15:45:29,410 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 888 selfloop transitions, 160 changer transitions 0/1067 dead transitions. [2024-06-20 15:45:29,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1067 transitions, 19668 flow [2024-06-20 15:45:29,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:45:29,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:45:29,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-20 15:45:29,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-20 15:45:29,411 INFO L175 Difference]: Start difference. First operand has 343 places, 993 transitions, 16411 flow. Second operand 11 states and 209 transitions. [2024-06-20 15:45:29,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1067 transitions, 19668 flow [2024-06-20 15:45:33,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 1067 transitions, 19328 flow, removed 96 selfloop flow, removed 9 redundant places. [2024-06-20 15:45:33,539 INFO L231 Difference]: Finished difference. Result has 345 places, 1004 transitions, 16725 flow [2024-06-20 15:45:33,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16071, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=993, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=844, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16725, PETRI_PLACES=345, PETRI_TRANSITIONS=1004} [2024-06-20 15:45:33,540 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 300 predicate places. [2024-06-20 15:45:33,540 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 1004 transitions, 16725 flow [2024-06-20 15:45:33,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:33,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:33,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:33,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 15:45:33,540 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:33,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:33,541 INFO L85 PathProgramCache]: Analyzing trace with hash 537455641, now seen corresponding path program 4 times [2024-06-20 15:45:33,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:33,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759780468] [2024-06-20 15:45:33,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:33,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:34,800 INFO 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 15:45:34,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:34,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759780468] [2024-06-20 15:45:34,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759780468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:34,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:34,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:45:34,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870397035] [2024-06-20 15:45:34,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:34,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:45:34,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:34,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:45:34,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:45:35,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:45:35,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 1004 transitions, 16725 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:35,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:35,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:45:35,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:38,640 INFO L124 PetriNetUnfolderBase]: 7297/10845 cut-off events. [2024-06-20 15:45:38,641 INFO L125 PetriNetUnfolderBase]: For 1627478/1627811 co-relation queries the response was YES. [2024-06-20 15:45:38,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110329 conditions, 10845 events. 7297/10845 cut-off events. For 1627478/1627811 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 62316 event pairs, 2009 based on Foata normal form. 213/10918 useless extension candidates. Maximal degree in co-relation 110171. Up to 10113 conditions per place. [2024-06-20 15:45:38,798 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 904 selfloop transitions, 42 changer transitions 0/1044 dead transitions. [2024-06-20 15:45:38,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 1044 transitions, 19000 flow [2024-06-20 15:45:38,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:45:38,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:45:38,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-20 15:45:38,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4113636363636364 [2024-06-20 15:45:38,800 INFO L175 Difference]: Start difference. First operand has 345 places, 1004 transitions, 16725 flow. Second operand 10 states and 181 transitions. [2024-06-20 15:45:38,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 1044 transitions, 19000 flow [2024-06-20 15:45:43,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 1044 transitions, 18503 flow, removed 119 selfloop flow, removed 8 redundant places. [2024-06-20 15:45:43,221 INFO L231 Difference]: Finished difference. Result has 348 places, 1011 transitions, 16526 flow [2024-06-20 15:45:43,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16232, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1004, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=966, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16526, PETRI_PLACES=348, PETRI_TRANSITIONS=1011} [2024-06-20 15:45:43,222 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 303 predicate places. [2024-06-20 15:45:43,222 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 1011 transitions, 16526 flow [2024-06-20 15:45:43,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:43,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:43,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:43,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 15:45:43,222 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:43,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:43,223 INFO L85 PathProgramCache]: Analyzing trace with hash 289294263, now seen corresponding path program 5 times [2024-06-20 15:45:43,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:43,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061755726] [2024-06-20 15:45:43,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:43,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:44,727 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 15:45:44,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:44,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061755726] [2024-06-20 15:45:44,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061755726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:44,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:44,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:45:44,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47455310] [2024-06-20 15:45:44,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:44,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:45:44,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:44,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:45:44,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:45:44,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:45:44,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 1011 transitions, 16526 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:44,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:44,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:45:44,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:48,260 INFO L124 PetriNetUnfolderBase]: 7275/10819 cut-off events. [2024-06-20 15:45:48,260 INFO L125 PetriNetUnfolderBase]: For 1646733/1647071 co-relation queries the response was YES. [2024-06-20 15:45:48,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110015 conditions, 10819 events. 7275/10819 cut-off events. For 1646733/1647071 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 62217 event pairs, 1971 based on Foata normal form. 231/10914 useless extension candidates. Maximal degree in co-relation 109855. Up to 10031 conditions per place. [2024-06-20 15:45:48,423 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 893 selfloop transitions, 61 changer transitions 0/1052 dead transitions. [2024-06-20 15:45:48,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1052 transitions, 18833 flow [2024-06-20 15:45:48,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:45:48,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:45:48,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-20 15:45:48,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159090909090909 [2024-06-20 15:45:48,424 INFO L175 Difference]: Start difference. First operand has 348 places, 1011 transitions, 16526 flow. Second operand 10 states and 183 transitions. [2024-06-20 15:45:48,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1052 transitions, 18833 flow [2024-06-20 15:45:52,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1052 transitions, 18647 flow, removed 52 selfloop flow, removed 8 redundant places. [2024-06-20 15:45:52,740 INFO L231 Difference]: Finished difference. Result has 351 places, 1018 transitions, 16664 flow [2024-06-20 15:45:52,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16340, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1011, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=954, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16664, PETRI_PLACES=351, PETRI_TRANSITIONS=1018} [2024-06-20 15:45:52,741 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 306 predicate places. [2024-06-20 15:45:52,741 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 1018 transitions, 16664 flow [2024-06-20 15:45:52,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:52,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:52,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:52,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 15:45:52,742 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:52,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:52,742 INFO L85 PathProgramCache]: Analyzing trace with hash 187649144, now seen corresponding path program 14 times [2024-06-20 15:45:52,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:52,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502036274] [2024-06-20 15:45:52,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:52,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:53,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:53,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502036274] [2024-06-20 15:45:53,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502036274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:53,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:53,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:45:53,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145837660] [2024-06-20 15:45:53,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:53,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:45:53,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:53,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:45:53,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:45:53,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:45:53,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1018 transitions, 16664 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:53,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:53,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:45:53,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:57,282 INFO L124 PetriNetUnfolderBase]: 6626/10108 cut-off events. [2024-06-20 15:45:57,283 INFO L125 PetriNetUnfolderBase]: For 1610201/1610209 co-relation queries the response was YES. [2024-06-20 15:45:57,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106600 conditions, 10108 events. 6626/10108 cut-off events. For 1610201/1610209 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 60904 event pairs, 1640 based on Foata normal form. 8/10107 useless extension candidates. Maximal degree in co-relation 106438. Up to 8648 conditions per place. [2024-06-20 15:45:57,439 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 859 selfloop transitions, 213 changer transitions 0/1093 dead transitions. [2024-06-20 15:45:57,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 1093 transitions, 20453 flow [2024-06-20 15:45:57,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:45:57,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:45:57,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-20 15:45:57,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-20 15:45:57,441 INFO L175 Difference]: Start difference. First operand has 351 places, 1018 transitions, 16664 flow. Second operand 11 states and 209 transitions. [2024-06-20 15:45:57,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 1093 transitions, 20453 flow [2024-06-20 15:46:01,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 1093 transitions, 20247 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-20 15:46:01,701 INFO L231 Difference]: Finished difference. Result has 355 places, 1040 transitions, 17510 flow [2024-06-20 15:46:01,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16458, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1018, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=827, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17510, PETRI_PLACES=355, PETRI_TRANSITIONS=1040} [2024-06-20 15:46:01,702 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 310 predicate places. [2024-06-20 15:46:01,702 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 1040 transitions, 17510 flow [2024-06-20 15:46:01,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:01,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:01,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:01,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 15:46:01,703 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:01,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:01,703 INFO L85 PathProgramCache]: Analyzing trace with hash 187643564, now seen corresponding path program 15 times [2024-06-20 15:46:01,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:01,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592441073] [2024-06-20 15:46:01,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:01,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:02,866 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 15:46:02,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:02,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592441073] [2024-06-20 15:46:02,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592441073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:02,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:02,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:46:02,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59521573] [2024-06-20 15:46:02,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:02,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:46:02,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:02,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:46:02,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:46:03,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:46:03,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 1040 transitions, 17510 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:03,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:03,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:46:03,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:06,370 INFO L124 PetriNetUnfolderBase]: 6633/10124 cut-off events. [2024-06-20 15:46:06,371 INFO L125 PetriNetUnfolderBase]: For 1618793/1618801 co-relation queries the response was YES. [2024-06-20 15:46:06,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106865 conditions, 10124 events. 6633/10124 cut-off events. For 1618793/1618801 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 61073 event pairs, 1596 based on Foata normal form. 8/10123 useless extension candidates. Maximal degree in co-relation 106702. Up to 8650 conditions per place. [2024-06-20 15:46:06,521 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 855 selfloop transitions, 215 changer transitions 0/1091 dead transitions. [2024-06-20 15:46:06,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1091 transitions, 20369 flow [2024-06-20 15:46:06,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:46:06,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:46:06,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-20 15:46:06,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-20 15:46:06,523 INFO L175 Difference]: Start difference. First operand has 355 places, 1040 transitions, 17510 flow. Second operand 10 states and 195 transitions. [2024-06-20 15:46:06,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1091 transitions, 20369 flow [2024-06-20 15:46:11,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 1091 transitions, 19705 flow, removed 183 selfloop flow, removed 7 redundant places. [2024-06-20 15:46:11,565 INFO L231 Difference]: Finished difference. Result has 358 places, 1040 transitions, 17292 flow [2024-06-20 15:46:11,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16846, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1040, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=825, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17292, PETRI_PLACES=358, PETRI_TRANSITIONS=1040} [2024-06-20 15:46:11,567 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 313 predicate places. [2024-06-20 15:46:11,567 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 1040 transitions, 17292 flow [2024-06-20 15:46:11,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:11,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:11,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:11,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 15:46:11,568 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:11,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:11,568 INFO L85 PathProgramCache]: Analyzing trace with hash 187850954, now seen corresponding path program 16 times [2024-06-20 15:46:11,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:11,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284237312] [2024-06-20 15:46:11,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:11,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:11,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:12,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:12,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284237312] [2024-06-20 15:46:12,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284237312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:12,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:12,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:46:12,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545586002] [2024-06-20 15:46:12,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:12,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:46:12,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:12,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:46:12,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:46:12,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:46:12,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 1040 transitions, 17292 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:12,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:12,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:46:12,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:15,842 INFO L124 PetriNetUnfolderBase]: 6611/10099 cut-off events. [2024-06-20 15:46:15,842 INFO L125 PetriNetUnfolderBase]: For 1620954/1620962 co-relation queries the response was YES. [2024-06-20 15:46:15,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105971 conditions, 10099 events. 6611/10099 cut-off events. For 1620954/1620962 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 60864 event pairs, 1674 based on Foata normal form. 8/10098 useless extension candidates. Maximal degree in co-relation 105807. Up to 8632 conditions per place. [2024-06-20 15:46:16,004 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 875 selfloop transitions, 198 changer transitions 0/1094 dead transitions. [2024-06-20 15:46:16,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1094 transitions, 19894 flow [2024-06-20 15:46:16,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:46:16,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:46:16,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-20 15:46:16,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4256198347107438 [2024-06-20 15:46:16,006 INFO L175 Difference]: Start difference. First operand has 358 places, 1040 transitions, 17292 flow. Second operand 11 states and 206 transitions. [2024-06-20 15:46:16,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1094 transitions, 19894 flow [2024-06-20 15:46:21,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1094 transitions, 19307 flow, removed 102 selfloop flow, removed 8 redundant places. [2024-06-20 15:46:21,198 INFO L231 Difference]: Finished difference. Result has 361 places, 1040 transitions, 17117 flow [2024-06-20 15:46:21,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16705, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1040, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=842, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17117, PETRI_PLACES=361, PETRI_TRANSITIONS=1040} [2024-06-20 15:46:21,199 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 316 predicate places. [2024-06-20 15:46:21,199 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 1040 transitions, 17117 flow [2024-06-20 15:46:21,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:21,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:21,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:21,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 15:46:21,200 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:21,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:21,200 INFO L85 PathProgramCache]: Analyzing trace with hash 187643409, now seen corresponding path program 5 times [2024-06-20 15:46:21,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:21,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955432391] [2024-06-20 15:46:21,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:21,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:22,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:22,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955432391] [2024-06-20 15:46:22,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955432391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:22,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:22,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:46:22,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254974853] [2024-06-20 15:46:22,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:22,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:46:22,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:22,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:46:22,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:46:22,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:46:22,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 1040 transitions, 17117 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:22,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:22,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:46:22,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:26,087 INFO L124 PetriNetUnfolderBase]: 6606/10085 cut-off events. [2024-06-20 15:46:26,087 INFO L125 PetriNetUnfolderBase]: For 1624241/1624261 co-relation queries the response was YES. [2024-06-20 15:46:26,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105718 conditions, 10085 events. 6606/10085 cut-off events. For 1624241/1624261 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 60781 event pairs, 1725 based on Foata normal form. 2/10075 useless extension candidates. Maximal degree in co-relation 105553. Up to 9416 conditions per place. [2024-06-20 15:46:26,248 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 1006 selfloop transitions, 43 changer transitions 0/1070 dead transitions. [2024-06-20 15:46:26,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1070 transitions, 19488 flow [2024-06-20 15:46:26,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:46:26,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:46:26,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 15:46:26,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-20 15:46:26,249 INFO L175 Difference]: Start difference. First operand has 361 places, 1040 transitions, 17117 flow. Second operand 9 states and 167 transitions. [2024-06-20 15:46:26,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 1070 transitions, 19488 flow [2024-06-20 15:46:31,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 1070 transitions, 18874 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-20 15:46:31,520 INFO L231 Difference]: Finished difference. Result has 358 places, 1043 transitions, 16712 flow [2024-06-20 15:46:31,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16503, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1040, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=997, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16712, PETRI_PLACES=358, PETRI_TRANSITIONS=1043} [2024-06-20 15:46:31,521 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 313 predicate places. [2024-06-20 15:46:31,521 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 1043 transitions, 16712 flow [2024-06-20 15:46:31,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:31,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:31,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:31,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 15:46:31,522 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 15:46:31,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:31,522 INFO L85 PathProgramCache]: Analyzing trace with hash 921345017, now seen corresponding path program 3 times [2024-06-20 15:46:31,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:31,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447708552] [2024-06-20 15:46:31,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:31,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:32,415 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 15:46:32,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:32,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447708552] [2024-06-20 15:46:32,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447708552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:32,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:32,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:46:32,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719384972] [2024-06-20 15:46:32,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:32,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:46:32,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:32,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:46:32,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:46:32,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 15:46:32,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 1043 transitions, 16712 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 15:46:32,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:32,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 15:46:32,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:35,427 INFO L124 PetriNetUnfolderBase]: 6899/10313 cut-off events. [2024-06-20 15:46:35,428 INFO L125 PetriNetUnfolderBase]: For 1956950/1957317 co-relation queries the response was YES. [2024-06-20 15:46:35,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110376 conditions, 10313 events. 6899/10313 cut-off events. For 1956950/1957317 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 59301 event pairs, 1632 based on Foata normal form. 153/10238 useless extension candidates. Maximal degree in co-relation 110210. Up to 9443 conditions per place. [2024-06-20 15:46:35,747 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 893 selfloop transitions, 15 changer transitions 0/1052 dead transitions. [2024-06-20 15:46:35,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1052 transitions, 18562 flow [2024-06-20 15:46:35,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:46:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:46:35,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 15:46:35,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-20 15:46:35,748 INFO L175 Difference]: Start difference. First operand has 358 places, 1043 transitions, 16712 flow. Second operand 7 states and 122 transitions. [2024-06-20 15:46:35,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1052 transitions, 18562 flow