./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix026_power.opt_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix026_power.opt_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/mix026_power.opt_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix026_power.opt_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 19:28:33,311 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:28:33,370 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:28:33,375 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:28:33,375 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:28:33,403 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:28:33,404 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:28:33,404 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:28:33,405 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:28:33,408 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:28:33,408 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:28:33,408 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:28:33,409 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:28:33,410 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:28:33,410 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:28:33,410 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:28:33,411 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:28:33,411 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:28:33,411 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:28:33,411 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:28:33,411 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:28:33,412 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:28:33,412 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:28:33,412 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:28:33,412 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:28:33,413 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:28:33,413 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:28:33,413 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:28:33,414 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:28:33,414 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:28:33,415 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:28:33,415 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:28:33,415 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:28:33,415 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:28:33,415 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:28:33,416 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:28:33,416 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:28:33,416 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:28:33,416 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:28:33,416 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:28:33,417 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:28:33,417 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:28:33,417 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:28:33,417 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:28:33,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:28:33,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:28:33,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:28:33,601 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:28:33,602 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:28:33,603 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix026_power.opt_tso.opt.yml/witness.yml [2024-06-03 19:28:33,794 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:28:33,794 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:28:33,795 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix026_power.opt_tso.opt.i [2024-06-03 19:28:34,779 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:28:35,025 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:28:35,026 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix026_power.opt_tso.opt.i [2024-06-03 19:28:35,049 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/032cf1fc4/3ec96cf2b8e74636a1cb59751296e0a5/FLAG2aac665ee [2024-06-03 19:28:35,063 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/032cf1fc4/3ec96cf2b8e74636a1cb59751296e0a5 [2024-06-03 19:28:35,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:28:35,066 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:28:35,068 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:28:35,068 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:28:35,072 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:28:35,072 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:28:33" (1/2) ... [2024-06-03 19:28:35,073 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7074173f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:28:35, skipping insertion in model container [2024-06-03 19:28:35,073 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:28:33" (1/2) ... [2024-06-03 19:28:35,075 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@78095d96 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:28:35, skipping insertion in model container [2024-06-03 19:28:35,075 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:28:35" (2/2) ... [2024-06-03 19:28:35,075 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7074173f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:28:35, skipping insertion in model container [2024-06-03 19:28:35,076 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:28:35" (2/2) ... [2024-06-03 19:28:35,076 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:28:35,186 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:28:35,187 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] ((((((((((((((((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-03 19:28:35,187 INFO L97 edCorrectnessWitness]: Location invariant before [L865-L865] ((((((((((((((((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-03 19:28:35,187 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] ((((((((((((((((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-03 19:28:35,187 INFO L97 edCorrectnessWitness]: Location invariant before [L870-L870] ((((((((((((((((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-03 19:28:35,188 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:28:35,188 INFO L106 edCorrectnessWitness]: ghost_update [L863-L863] multithreaded = 1; [2024-06-03 19:28:35,226 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:28:35,578 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:28:35,594 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:28:35,696 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:28:35,724 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:28:35,725 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:28:35 WrapperNode [2024-06-03 19:28:35,725 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:28:35,725 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:28:35,726 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:28:35,726 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:28:35,730 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:28:35" (1/1) ... [2024-06-03 19:28:35,742 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:28:35" (1/1) ... [2024-06-03 19:28:35,773 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 139 [2024-06-03 19:28:35,774 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:28:35,774 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:28:35,774 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:28:35,775 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:28:35,782 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:28:35" (1/1) ... [2024-06-03 19:28:35,782 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:28:35" (1/1) ... [2024-06-03 19:28:35,786 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:28:35" (1/1) ... [2024-06-03 19:28:35,797 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]. [2024-06-03 19:28:35,797 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:28:35" (1/1) ... [2024-06-03 19:28:35,798 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:28:35" (1/1) ... [2024-06-03 19:28:35,806 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:28:35" (1/1) ... [2024-06-03 19:28:35,807 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:28:35" (1/1) ... [2024-06-03 19:28:35,808 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:28:35" (1/1) ... [2024-06-03 19:28:35,810 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:28:35" (1/1) ... [2024-06-03 19:28:35,813 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:28:35,813 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:28:35,813 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:28:35,813 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:28:35,814 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:28:35" (1/1) ... [2024-06-03 19:28:35,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:28:35,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:28:35,834 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) [2024-06-03 19:28:35,839 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 [2024-06-03 19:28:35,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:28:35,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:28:35,859 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:28:35,859 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:28:35,859 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:28:35,860 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:28:35,860 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:28:35,860 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:28:35,860 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-03 19:28:35,860 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-03 19:28:35,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:28:35,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:28:35,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:28:35,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:28:35,862 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:28:35,958 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:28:35,960 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:28:36,322 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:28:36,322 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:28:36,539 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:28:36,539 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:28:36,540 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:28:36 BoogieIcfgContainer [2024-06-03 19:28:36,540 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:28:36,543 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:28:36,543 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:28:36,545 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:28:36,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:28:33" (1/4) ... [2024-06-03 19:28:36,546 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1d977f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:28:36, skipping insertion in model container [2024-06-03 19:28:36,546 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:28:35" (2/4) ... [2024-06-03 19:28:36,546 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1d977f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:28:36, skipping insertion in model container [2024-06-03 19:28:36,546 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:28:35" (3/4) ... [2024-06-03 19:28:36,546 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1d977f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:28:36, skipping insertion in model container [2024-06-03 19:28:36,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:28:36" (4/4) ... [2024-06-03 19:28:36,547 INFO L112 eAbstractionObserver]: Analyzing ICFG mix026_power.opt_tso.opt.i [2024-06-03 19:28:36,560 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:28:36,560 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-03 19:28:36,560 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:28:36,603 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:28:36,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-03 19:28:36,649 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-03 19:28:36,650 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:28:36,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 88 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:28:36,652 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-03 19:28:36,655 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-03 19:28:36,661 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:28:36,666 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;@473951aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:28:36,666 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-03 19:28:36,669 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:28:36,669 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:28:36,669 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:28:36,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:36,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:28:36,670 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:28:36,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:36,674 INFO L85 PathProgramCache]: Analyzing trace with hash -676653366, now seen corresponding path program 1 times [2024-06-03 19:28:36,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:36,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502017826] [2024-06-03 19:28:36,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:36,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:37,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:37,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502017826] [2024-06-03 19:28:37,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502017826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:37,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:37,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:28:37,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507735776] [2024-06-03 19:28:37,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:37,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:28:37,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:37,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:28:37,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:28:37,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-03 19:28:37,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:37,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:37,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-03 19:28:37,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:39,136 INFO L124 PetriNetUnfolderBase]: 8152/11668 cut-off events. [2024-06-03 19:28:39,136 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2024-06-03 19:28:39,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23157 conditions, 11668 events. 8152/11668 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 66187 event pairs, 6174 based on Foata normal form. 1/11288 useless extension candidates. Maximal degree in co-relation 23141. Up to 11108 conditions per place. [2024-06-03 19:28:39,195 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 44 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-03 19:28:39,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 233 flow [2024-06-03 19:28:39,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:28:39,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:28:39,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-06-03 19:28:39,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6163522012578616 [2024-06-03 19:28:39,206 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 98 transitions. [2024-06-03 19:28:39,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 233 flow [2024-06-03 19:28:39,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 226 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 19:28:39,214 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-03 19:28:39,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-03 19:28:39,217 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-03 19:28:39,218 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-03 19:28:39,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:39,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:39,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:39,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:28:39,219 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:28:39,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:39,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1723788823, now seen corresponding path program 1 times [2024-06-03 19:28:39,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:39,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072283074] [2024-06-03 19:28:39,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:39,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:39,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:39,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:39,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072283074] [2024-06-03 19:28:39,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072283074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:39,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:39,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:28:39,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841922127] [2024-06-03 19:28:39,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:39,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:28:39,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:39,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:28:39,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:28:39,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:28:39,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:39,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:39,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:28:39,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:41,299 INFO L124 PetriNetUnfolderBase]: 9527/13245 cut-off events. [2024-06-03 19:28:41,299 INFO L125 PetriNetUnfolderBase]: For 2494/2494 co-relation queries the response was YES. [2024-06-03 19:28:41,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29986 conditions, 13245 events. 9527/13245 cut-off events. For 2494/2494 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 72173 event pairs, 5670 based on Foata normal form. 8/13200 useless extension candidates. Maximal degree in co-relation 29971. Up to 12883 conditions per place. [2024-06-03 19:28:41,443 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 56 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-03 19:28:41,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 72 transitions, 331 flow [2024-06-03 19:28:41,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:28:41,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:28:41,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-03 19:28:41,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.589622641509434 [2024-06-03 19:28:41,446 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 125 transitions. [2024-06-03 19:28:41,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 72 transitions, 331 flow [2024-06-03 19:28:41,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 72 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:28:41,448 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-03 19:28:41,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-03 19:28:41,449 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-03 19:28:41,449 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-03 19:28:41,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:41,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:41,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:41,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:28:41,450 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:28:41,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:41,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1532255392, now seen corresponding path program 1 times [2024-06-03 19:28:41,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:41,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770008454] [2024-06-03 19:28:41,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:41,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:41,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:42,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:42,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770008454] [2024-06-03 19:28:42,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770008454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:42,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:42,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:28:42,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008216951] [2024-06-03 19:28:42,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:42,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:28:42,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:42,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:28:42,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:28:42,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:28:42,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:42,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:42,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:28:42,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:44,341 INFO L124 PetriNetUnfolderBase]: 9511/13195 cut-off events. [2024-06-03 19:28:44,346 INFO L125 PetriNetUnfolderBase]: For 7072/7072 co-relation queries the response was YES. [2024-06-03 19:28:44,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33310 conditions, 13195 events. 9511/13195 cut-off events. For 7072/7072 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 71788 event pairs, 4705 based on Foata normal form. 8/13156 useless extension candidates. Maximal degree in co-relation 33293. Up to 12817 conditions per place. [2024-06-03 19:28:44,393 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 72 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-06-03 19:28:44,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 490 flow [2024-06-03 19:28:44,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:28:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:28:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-03 19:28:44,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5534591194968553 [2024-06-03 19:28:44,395 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 176 transitions. [2024-06-03 19:28:44,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 490 flow [2024-06-03 19:28:44,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 462 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-03 19:28:44,398 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 243 flow [2024-06-03 19:28:44,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-03 19:28:44,399 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-06-03 19:28:44,399 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 243 flow [2024-06-03 19:28:44,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:44,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:44,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:44,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:28:44,400 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:28:44,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:44,400 INFO L85 PathProgramCache]: Analyzing trace with hash 954243784, now seen corresponding path program 1 times [2024-06-03 19:28:44,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:44,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497320956] [2024-06-03 19:28:44,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:44,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:45,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:45,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:45,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497320956] [2024-06-03 19:28:45,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497320956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:45,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:45,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:28:45,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362094142] [2024-06-03 19:28:45,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:45,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:28:45,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:45,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:28:45,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:28:45,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:28:45,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 243 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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) [2024-06-03 19:28:45,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:45,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:28:45,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:46,300 INFO L124 PetriNetUnfolderBase]: 8107/11580 cut-off events. [2024-06-03 19:28:46,300 INFO L125 PetriNetUnfolderBase]: For 11520/11520 co-relation queries the response was YES. [2024-06-03 19:28:46,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31986 conditions, 11580 events. 8107/11580 cut-off events. For 11520/11520 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 65308 event pairs, 4373 based on Foata normal form. 3/11390 useless extension candidates. Maximal degree in co-relation 31967. Up to 11029 conditions per place. [2024-06-03 19:28:46,363 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 60 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-03 19:28:46,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 449 flow [2024-06-03 19:28:46,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:28:46,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:28:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-03 19:28:46,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981132075471698 [2024-06-03 19:28:46,365 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 243 flow. Second operand 5 states and 132 transitions. [2024-06-03 19:28:46,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 449 flow [2024-06-03 19:28:46,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 411 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-03 19:28:46,373 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 266 flow [2024-06-03 19:28:46,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-03 19:28:46,374 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-03 19:28:46,375 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 266 flow [2024-06-03 19:28:46,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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) [2024-06-03 19:28:46,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:46,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:46,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:28:46,375 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:28:46,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:46,376 INFO L85 PathProgramCache]: Analyzing trace with hash 14666613, now seen corresponding path program 1 times [2024-06-03 19:28:46,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:46,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731622189] [2024-06-03 19:28:46,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:46,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:47,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:47,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731622189] [2024-06-03 19:28:47,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731622189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:47,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:47,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:28:47,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664819259] [2024-06-03 19:28:47,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:47,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:28:47,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:47,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:28:47,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:28:47,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:28:47,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 266 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 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) [2024-06-03 19:28:47,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:47,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:28:47,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:49,025 INFO L124 PetriNetUnfolderBase]: 9546/13253 cut-off events. [2024-06-03 19:28:49,026 INFO L125 PetriNetUnfolderBase]: For 21313/21313 co-relation queries the response was YES. [2024-06-03 19:28:49,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40127 conditions, 13253 events. 9546/13253 cut-off events. For 21313/21313 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 72087 event pairs, 5132 based on Foata normal form. 6/13210 useless extension candidates. Maximal degree in co-relation 40106. Up to 12898 conditions per place. [2024-06-03 19:28:49,107 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 72 selfloop transitions, 14 changer transitions 0/93 dead transitions. [2024-06-03 19:28:49,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 93 transitions, 540 flow [2024-06-03 19:28:49,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:28:49,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:28:49,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-03 19:28:49,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-03 19:28:49,109 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 266 flow. Second operand 6 states and 156 transitions. [2024-06-03 19:28:49,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 93 transitions, 540 flow [2024-06-03 19:28:49,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 93 transitions, 511 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 19:28:49,114 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 312 flow [2024-06-03 19:28:49,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-03 19:28:49,115 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2024-06-03 19:28:49,115 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 312 flow [2024-06-03 19:28:49,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 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) [2024-06-03 19:28:49,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:49,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:49,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:28:49,116 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:28:49,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:49,116 INFO L85 PathProgramCache]: Analyzing trace with hash 14816343, now seen corresponding path program 2 times [2024-06-03 19:28:49,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:49,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229177393] [2024-06-03 19:28:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:49,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:49,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:50,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:50,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229177393] [2024-06-03 19:28:50,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229177393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:50,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:50,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:28:50,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802722976] [2024-06-03 19:28:50,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:50,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:28:50,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:50,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:28:50,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:28:50,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:28:50,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 312 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 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) [2024-06-03 19:28:50,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:50,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:28:50,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:51,333 INFO L124 PetriNetUnfolderBase]: 9559/13288 cut-off events. [2024-06-03 19:28:51,333 INFO L125 PetriNetUnfolderBase]: For 30867/30875 co-relation queries the response was YES. [2024-06-03 19:28:51,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43606 conditions, 13288 events. 9559/13288 cut-off events. For 30867/30875 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 72386 event pairs, 5092 based on Foata normal form. 12/13249 useless extension candidates. Maximal degree in co-relation 43584. Up to 12871 conditions per place. [2024-06-03 19:28:51,407 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 67 selfloop transitions, 21 changer transitions 0/95 dead transitions. [2024-06-03 19:28:51,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 594 flow [2024-06-03 19:28:51,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:28:51,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:28:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-03 19:28:51,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-03 19:28:51,409 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 312 flow. Second operand 6 states and 156 transitions. [2024-06-03 19:28:51,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 594 flow [2024-06-03 19:28:51,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 95 transitions, 551 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 19:28:51,416 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 366 flow [2024-06-03 19:28:51,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=366, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-03 19:28:51,417 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-03 19:28:51,417 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 366 flow [2024-06-03 19:28:51,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 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) [2024-06-03 19:28:51,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:51,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:51,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:28:51,418 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:28:51,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:51,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1923220539, now seen corresponding path program 1 times [2024-06-03 19:28:51,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:51,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434405516] [2024-06-03 19:28:51,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:51,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:52,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:52,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434405516] [2024-06-03 19:28:52,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434405516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:52,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:52,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:28:52,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322488351] [2024-06-03 19:28:52,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:52,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:28:52,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:52,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:28:52,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:28:52,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:28:52,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 366 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:52,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:52,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:28:52,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:54,270 INFO L124 PetriNetUnfolderBase]: 9950/14133 cut-off events. [2024-06-03 19:28:54,271 INFO L125 PetriNetUnfolderBase]: For 42397/42397 co-relation queries the response was YES. [2024-06-03 19:28:54,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48894 conditions, 14133 events. 9950/14133 cut-off events. For 42397/42397 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 79735 event pairs, 5126 based on Foata normal form. 3/13903 useless extension candidates. Maximal degree in co-relation 48871. Up to 13468 conditions per place. [2024-06-03 19:28:54,365 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 82 selfloop transitions, 20 changer transitions 0/109 dead transitions. [2024-06-03 19:28:54,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 109 transitions, 714 flow [2024-06-03 19:28:54,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:28:54,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:28:54,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-03 19:28:54,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481132075471698 [2024-06-03 19:28:54,367 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 366 flow. Second operand 8 states and 190 transitions. [2024-06-03 19:28:54,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 109 transitions, 714 flow [2024-06-03 19:28:54,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 109 transitions, 644 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-03 19:28:54,380 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 433 flow [2024-06-03 19:28:54,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=433, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2024-06-03 19:28:54,381 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2024-06-03 19:28:54,381 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 433 flow [2024-06-03 19:28:54,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:54,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:54,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:54,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:28:54,382 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:28:54,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:54,382 INFO L85 PathProgramCache]: Analyzing trace with hash 454545923, now seen corresponding path program 1 times [2024-06-03 19:28:54,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:54,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358672445] [2024-06-03 19:28:54,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:54,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:55,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:55,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358672445] [2024-06-03 19:28:55,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358672445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:55,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:55,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:28:55,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969223855] [2024-06-03 19:28:55,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:55,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:28:55,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:55,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:28:55,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:28:55,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:28:55,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 433 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:55,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:55,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:28:55,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:57,293 INFO L124 PetriNetUnfolderBase]: 11374/15805 cut-off events. [2024-06-03 19:28:57,293 INFO L125 PetriNetUnfolderBase]: For 65466/65466 co-relation queries the response was YES. [2024-06-03 19:28:57,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59956 conditions, 15805 events. 11374/15805 cut-off events. For 65466/65466 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 87805 event pairs, 5636 based on Foata normal form. 3/15737 useless extension candidates. Maximal degree in co-relation 59930. Up to 15345 conditions per place. [2024-06-03 19:28:57,397 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 92 selfloop transitions, 19 changer transitions 0/119 dead transitions. [2024-06-03 19:28:57,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 119 transitions, 801 flow [2024-06-03 19:28:57,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:28:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:28:57,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-03 19:28:57,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-03 19:28:57,399 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 433 flow. Second operand 7 states and 182 transitions. [2024-06-03 19:28:57,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 119 transitions, 801 flow [2024-06-03 19:28:57,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 119 transitions, 742 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-03 19:28:57,413 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 479 flow [2024-06-03 19:28:57,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=479, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2024-06-03 19:28:57,414 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 22 predicate places. [2024-06-03 19:28:57,414 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 479 flow [2024-06-03 19:28:57,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:57,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:57,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:57,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:28:57,415 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:28:57,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:57,415 INFO L85 PathProgramCache]: Analyzing trace with hash -509704297, now seen corresponding path program 1 times [2024-06-03 19:28:57,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:57,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759000972] [2024-06-03 19:28:57,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:57,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:57,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:58,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:58,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:58,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759000972] [2024-06-03 19:28:58,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759000972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:58,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:58,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:28:58,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630136595] [2024-06-03 19:28:58,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:58,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:28:58,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:58,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:28:58,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:28:58,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:28:58,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 479 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:58,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:58,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:28:58,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:00,373 INFO L124 PetriNetUnfolderBase]: 9917/13856 cut-off events. [2024-06-03 19:29:00,373 INFO L125 PetriNetUnfolderBase]: For 71168/71168 co-relation queries the response was YES. [2024-06-03 19:29:00,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55356 conditions, 13856 events. 9917/13856 cut-off events. For 71168/71168 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 76658 event pairs, 4857 based on Foata normal form. 6/13699 useless extension candidates. Maximal degree in co-relation 55329. Up to 13393 conditions per place. [2024-06-03 19:29:00,467 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 95 selfloop transitions, 22 changer transitions 0/124 dead transitions. [2024-06-03 19:29:00,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 124 transitions, 855 flow [2024-06-03 19:29:00,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:29:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:29:00,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-03 19:29:00,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-03 19:29:00,469 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 479 flow. Second operand 8 states and 200 transitions. [2024-06-03 19:29:00,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 124 transitions, 855 flow [2024-06-03 19:29:00,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 124 transitions, 782 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 19:29:00,489 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 510 flow [2024-06-03 19:29:00,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=510, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-03 19:29:00,490 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-03 19:29:00,491 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 510 flow [2024-06-03 19:29:00,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:00,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:00,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:00,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:29:00,492 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:29:00,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:00,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1030486435, now seen corresponding path program 1 times [2024-06-03 19:29:00,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:00,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614856907] [2024-06-03 19:29:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:00,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:01,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:01,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:01,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614856907] [2024-06-03 19:29:01,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614856907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:01,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:01,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:29:01,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863953276] [2024-06-03 19:29:01,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:01,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:29:01,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:01,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:29:01,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:29:01,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:29:01,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 510 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) [2024-06-03 19:29:01,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:01,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:29:01,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:02,680 INFO L124 PetriNetUnfolderBase]: 9910/14223 cut-off events. [2024-06-03 19:29:02,680 INFO L125 PetriNetUnfolderBase]: For 83311/83311 co-relation queries the response was YES. [2024-06-03 19:29:02,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58231 conditions, 14223 events. 9910/14223 cut-off events. For 83311/83311 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 81487 event pairs, 4949 based on Foata normal form. 2/14042 useless extension candidates. Maximal degree in co-relation 58203. Up to 13450 conditions per place. [2024-06-03 19:29:02,767 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 85 selfloop transitions, 11 changer transitions 0/103 dead transitions. [2024-06-03 19:29:02,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 103 transitions, 776 flow [2024-06-03 19:29:02,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:29:02,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:29:02,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-03 19:29:02,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679245283018868 [2024-06-03 19:29:02,769 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 510 flow. Second operand 5 states and 124 transitions. [2024-06-03 19:29:02,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 103 transitions, 776 flow [2024-06-03 19:29:02,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 103 transitions, 698 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 19:29:02,788 INFO L231 Difference]: Finished difference. Result has 80 places, 90 transitions, 511 flow [2024-06-03 19:29:02,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=511, PETRI_PLACES=80, PETRI_TRANSITIONS=90} [2024-06-03 19:29:02,789 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2024-06-03 19:29:02,789 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 90 transitions, 511 flow [2024-06-03 19:29:02,789 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) [2024-06-03 19:29:02,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:02,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:02,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:29:02,790 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:29:02,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:02,790 INFO L85 PathProgramCache]: Analyzing trace with hash 175298842, now seen corresponding path program 1 times [2024-06-03 19:29:02,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:02,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173821595] [2024-06-03 19:29:02,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:02,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:03,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:03,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173821595] [2024-06-03 19:29:03,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173821595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:03,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:03,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:29:03,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088163066] [2024-06-03 19:29:03,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:03,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:29:03,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:03,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:29:03,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:29:04,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:29:04,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 90 transitions, 511 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:04,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:04,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:29:04,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:05,723 INFO L124 PetriNetUnfolderBase]: 11646/16153 cut-off events. [2024-06-03 19:29:05,724 INFO L125 PetriNetUnfolderBase]: For 117022/117022 co-relation queries the response was YES. [2024-06-03 19:29:05,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70382 conditions, 16153 events. 11646/16153 cut-off events. For 117022/117022 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 87976 event pairs, 5625 based on Foata normal form. 6/16156 useless extension candidates. Maximal degree in co-relation 70353. Up to 15632 conditions per place. [2024-06-03 19:29:05,838 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 111 selfloop transitions, 24 changer transitions 0/141 dead transitions. [2024-06-03 19:29:05,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 141 transitions, 971 flow [2024-06-03 19:29:05,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:29:05,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:29:05,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-03 19:29:05,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693396226415094 [2024-06-03 19:29:05,840 INFO L175 Difference]: Start difference. First operand has 80 places, 90 transitions, 511 flow. Second operand 8 states and 199 transitions. [2024-06-03 19:29:05,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 141 transitions, 971 flow [2024-06-03 19:29:05,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 141 transitions, 922 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-03 19:29:05,868 INFO L231 Difference]: Finished difference. Result has 86 places, 99 transitions, 615 flow [2024-06-03 19:29:05,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=615, PETRI_PLACES=86, PETRI_TRANSITIONS=99} [2024-06-03 19:29:05,869 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-06-03 19:29:05,869 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 99 transitions, 615 flow [2024-06-03 19:29:05,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:05,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:05,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:05,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:29:05,870 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:29:05,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:05,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1378760316, now seen corresponding path program 2 times [2024-06-03 19:29:05,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:05,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474545934] [2024-06-03 19:29:05,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:05,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:05,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:07,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:07,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:07,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474545934] [2024-06-03 19:29:07,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474545934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:07,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:07,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:29:07,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133089409] [2024-06-03 19:29:07,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:07,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:29:07,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:07,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:29:07,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:29:07,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:29:07,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 99 transitions, 615 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:07,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:07,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:29:07,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:08,889 INFO L124 PetriNetUnfolderBase]: 11690/16224 cut-off events. [2024-06-03 19:29:08,889 INFO L125 PetriNetUnfolderBase]: For 142237/142245 co-relation queries the response was YES. [2024-06-03 19:29:08,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76066 conditions, 16224 events. 11690/16224 cut-off events. For 142237/142245 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 88513 event pairs, 5634 based on Foata normal form. 9/16228 useless extension candidates. Maximal degree in co-relation 76035. Up to 15670 conditions per place. [2024-06-03 19:29:08,998 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 115 selfloop transitions, 38 changer transitions 0/159 dead transitions. [2024-06-03 19:29:08,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 159 transitions, 1175 flow [2024-06-03 19:29:08,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:29:08,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:29:09,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 19:29:09,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-03 19:29:09,000 INFO L175 Difference]: Start difference. First operand has 86 places, 99 transitions, 615 flow. Second operand 8 states and 196 transitions. [2024-06-03 19:29:09,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 159 transitions, 1175 flow [2024-06-03 19:29:09,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 159 transitions, 1072 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-03 19:29:09,040 INFO L231 Difference]: Finished difference. Result has 91 places, 121 transitions, 807 flow [2024-06-03 19:29:09,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=807, PETRI_PLACES=91, PETRI_TRANSITIONS=121} [2024-06-03 19:29:09,041 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 35 predicate places. [2024-06-03 19:29:09,041 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 121 transitions, 807 flow [2024-06-03 19:29:09,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:09,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:09,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:09,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:29:09,042 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:29:09,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:09,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1352658156, now seen corresponding path program 3 times [2024-06-03 19:29:09,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:09,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993358371] [2024-06-03 19:29:09,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:09,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:10,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:10,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993358371] [2024-06-03 19:29:10,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993358371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:10,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:10,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:29:10,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931017863] [2024-06-03 19:29:10,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:10,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:29:10,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:10,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:29:10,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:29:10,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:29:10,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 121 transitions, 807 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:10,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:10,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:29:10,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:12,042 INFO L124 PetriNetUnfolderBase]: 11712/16246 cut-off events. [2024-06-03 19:29:12,042 INFO L125 PetriNetUnfolderBase]: For 168432/168440 co-relation queries the response was YES. [2024-06-03 19:29:12,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80748 conditions, 16246 events. 11712/16246 cut-off events. For 168432/168440 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 88513 event pairs, 5634 based on Foata normal form. 9/16250 useless extension candidates. Maximal degree in co-relation 80714. Up to 15637 conditions per place. [2024-06-03 19:29:12,165 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 114 selfloop transitions, 53 changer transitions 0/173 dead transitions. [2024-06-03 19:29:12,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 173 transitions, 1461 flow [2024-06-03 19:29:12,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:29:12,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:29:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-03 19:29:12,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-03 19:29:12,167 INFO L175 Difference]: Start difference. First operand has 91 places, 121 transitions, 807 flow. Second operand 8 states and 200 transitions. [2024-06-03 19:29:12,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 173 transitions, 1461 flow [2024-06-03 19:29:12,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 173 transitions, 1375 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-03 19:29:12,224 INFO L231 Difference]: Finished difference. Result has 97 places, 132 transitions, 1016 flow [2024-06-03 19:29:12,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1016, PETRI_PLACES=97, PETRI_TRANSITIONS=132} [2024-06-03 19:29:12,225 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 41 predicate places. [2024-06-03 19:29:12,225 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 132 transitions, 1016 flow [2024-06-03 19:29:12,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:12,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:12,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:12,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:29:12,226 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:29:12,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:12,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1371408666, now seen corresponding path program 4 times [2024-06-03 19:29:12,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:12,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873082604] [2024-06-03 19:29:12,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:12,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:13,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:13,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:13,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873082604] [2024-06-03 19:29:13,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873082604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:13,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:13,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:29:13,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046698250] [2024-06-03 19:29:13,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:13,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:29:13,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:13,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:29:13,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:29:13,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:29:13,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 132 transitions, 1016 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:13,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:13,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:29:13,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:15,193 INFO L124 PetriNetUnfolderBase]: 11703/16234 cut-off events. [2024-06-03 19:29:15,193 INFO L125 PetriNetUnfolderBase]: For 189974/189982 co-relation queries the response was YES. [2024-06-03 19:29:15,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83129 conditions, 16234 events. 11703/16234 cut-off events. For 189974/189982 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 88404 event pairs, 5634 based on Foata normal form. 9/16238 useless extension candidates. Maximal degree in co-relation 83093. Up to 15688 conditions per place. [2024-06-03 19:29:15,332 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 127 selfloop transitions, 39 changer transitions 0/172 dead transitions. [2024-06-03 19:29:15,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 172 transitions, 1462 flow [2024-06-03 19:29:15,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:29:15,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:29:15,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-03 19:29:15,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46462264150943394 [2024-06-03 19:29:15,334 INFO L175 Difference]: Start difference. First operand has 97 places, 132 transitions, 1016 flow. Second operand 8 states and 197 transitions. [2024-06-03 19:29:15,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 172 transitions, 1462 flow [2024-06-03 19:29:15,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 172 transitions, 1331 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-03 19:29:15,430 INFO L231 Difference]: Finished difference. Result has 101 places, 134 transitions, 988 flow [2024-06-03 19:29:15,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=988, PETRI_PLACES=101, PETRI_TRANSITIONS=134} [2024-06-03 19:29:15,430 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-06-03 19:29:15,431 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 134 transitions, 988 flow [2024-06-03 19:29:15,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:15,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:15,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:15,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:29:15,431 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:29:15,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:15,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1916056531, now seen corresponding path program 1 times [2024-06-03 19:29:15,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:15,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613505108] [2024-06-03 19:29:15,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:15,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:16,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:16,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:16,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613505108] [2024-06-03 19:29:16,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613505108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:16,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:16,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:29:16,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236603900] [2024-06-03 19:29:16,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:16,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:29:16,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:16,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:29:16,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:29:16,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:29:16,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 134 transitions, 988 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:16,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:16,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:29:16,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:18,133 INFO L124 PetriNetUnfolderBase]: 11709/16250 cut-off events. [2024-06-03 19:29:18,134 INFO L125 PetriNetUnfolderBase]: For 199496/199496 co-relation queries the response was YES. [2024-06-03 19:29:18,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84349 conditions, 16250 events. 11709/16250 cut-off events. For 199496/199496 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 88392 event pairs, 5583 based on Foata normal form. 6/16253 useless extension candidates. Maximal degree in co-relation 84311. Up to 15780 conditions per place. [2024-06-03 19:29:18,257 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 140 selfloop transitions, 23 changer transitions 0/169 dead transitions. [2024-06-03 19:29:18,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 169 transitions, 1556 flow [2024-06-03 19:29:18,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:29:18,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:29:18,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 19:29:18,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46540880503144655 [2024-06-03 19:29:18,258 INFO L175 Difference]: Start difference. First operand has 101 places, 134 transitions, 988 flow. Second operand 6 states and 148 transitions. [2024-06-03 19:29:18,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 169 transitions, 1556 flow [2024-06-03 19:29:18,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 169 transitions, 1483 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-03 19:29:18,335 INFO L231 Difference]: Finished difference. Result has 105 places, 148 transitions, 1140 flow [2024-06-03 19:29:18,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1140, PETRI_PLACES=105, PETRI_TRANSITIONS=148} [2024-06-03 19:29:18,336 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-06-03 19:29:18,336 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 148 transitions, 1140 flow [2024-06-03 19:29:18,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:18,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:18,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:18,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:29:18,336 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:29:18,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:18,337 INFO L85 PathProgramCache]: Analyzing trace with hash 827894856, now seen corresponding path program 1 times [2024-06-03 19:29:18,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:18,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587570232] [2024-06-03 19:29:18,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:18,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:19,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:19,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587570232] [2024-06-03 19:29:19,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587570232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:19,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:19,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:29:19,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151687462] [2024-06-03 19:29:19,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:19,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:29:19,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:19,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:29:19,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:29:19,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:29:19,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 148 transitions, 1140 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:19,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:19,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:29:19,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:21,682 INFO L124 PetriNetUnfolderBase]: 12058/16798 cut-off events. [2024-06-03 19:29:21,682 INFO L125 PetriNetUnfolderBase]: For 257088/257226 co-relation queries the response was YES. [2024-06-03 19:29:21,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93541 conditions, 16798 events. 12058/16798 cut-off events. For 257088/257226 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 94269 event pairs, 4492 based on Foata normal form. 6/16717 useless extension candidates. Maximal degree in co-relation 93501. Up to 16107 conditions per place. [2024-06-03 19:29:21,807 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 161 selfloop transitions, 21 changer transitions 0/196 dead transitions. [2024-06-03 19:29:21,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 196 transitions, 1692 flow [2024-06-03 19:29:21,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:29:21,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:29:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-03 19:29:21,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858490566037736 [2024-06-03 19:29:21,809 INFO L175 Difference]: Start difference. First operand has 105 places, 148 transitions, 1140 flow. Second operand 8 states and 206 transitions. [2024-06-03 19:29:21,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 196 transitions, 1692 flow [2024-06-03 19:29:21,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 196 transitions, 1646 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-03 19:29:21,907 INFO L231 Difference]: Finished difference. Result has 112 places, 151 transitions, 1220 flow [2024-06-03 19:29:21,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1220, PETRI_PLACES=112, PETRI_TRANSITIONS=151} [2024-06-03 19:29:21,907 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 56 predicate places. [2024-06-03 19:29:21,907 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 151 transitions, 1220 flow [2024-06-03 19:29:21,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:21,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:21,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:21,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:29:21,908 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:29:21,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:21,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1023822076, now seen corresponding path program 2 times [2024-06-03 19:29:21,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:21,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889810983] [2024-06-03 19:29:21,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:21,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:22,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:22,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889810983] [2024-06-03 19:29:22,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889810983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:22,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:22,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:29:22,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773888714] [2024-06-03 19:29:22,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:22,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:29:22,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:22,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:29:22,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:29:23,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:29:23,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 151 transitions, 1220 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:23,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:23,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:29:23,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:25,276 INFO L124 PetriNetUnfolderBase]: 11844/16594 cut-off events. [2024-06-03 19:29:25,276 INFO L125 PetriNetUnfolderBase]: For 284107/284245 co-relation queries the response was YES. [2024-06-03 19:29:25,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95686 conditions, 16594 events. 11844/16594 cut-off events. For 284107/284245 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 93424 event pairs, 5085 based on Foata normal form. 6/16541 useless extension candidates. Maximal degree in co-relation 95643. Up to 15846 conditions per place. [2024-06-03 19:29:25,416 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 162 selfloop transitions, 22 changer transitions 0/198 dead transitions. [2024-06-03 19:29:25,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 198 transitions, 1780 flow [2024-06-03 19:29:25,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:29:25,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:29:25,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-03 19:29:25,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858490566037736 [2024-06-03 19:29:25,437 INFO L175 Difference]: Start difference. First operand has 112 places, 151 transitions, 1220 flow. Second operand 8 states and 206 transitions. [2024-06-03 19:29:25,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 198 transitions, 1780 flow [2024-06-03 19:29:25,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 198 transitions, 1680 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 19:29:25,565 INFO L231 Difference]: Finished difference. Result has 114 places, 154 transitions, 1254 flow [2024-06-03 19:29:25,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1120, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1254, PETRI_PLACES=114, PETRI_TRANSITIONS=154} [2024-06-03 19:29:25,566 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 58 predicate places. [2024-06-03 19:29:25,566 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 154 transitions, 1254 flow [2024-06-03 19:29:25,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:25,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:25,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:25,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:29:25,566 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:29:25,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:25,567 INFO L85 PathProgramCache]: Analyzing trace with hash -45722754, now seen corresponding path program 1 times [2024-06-03 19:29:25,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:25,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067513226] [2024-06-03 19:29:25,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:25,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:26,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:26,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067513226] [2024-06-03 19:29:26,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067513226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:26,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:26,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:29:26,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261634308] [2024-06-03 19:29:26,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:26,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:29:26,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:26,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:29:26,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:29:26,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:29:26,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 154 transitions, 1254 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:26,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:26,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:29:26,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:29,065 INFO L124 PetriNetUnfolderBase]: 12377/17168 cut-off events. [2024-06-03 19:29:29,065 INFO L125 PetriNetUnfolderBase]: For 323727/323865 co-relation queries the response was YES. [2024-06-03 19:29:29,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100295 conditions, 17168 events. 12377/17168 cut-off events. For 323727/323865 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 94094 event pairs, 5152 based on Foata normal form. 3/17099 useless extension candidates. Maximal degree in co-relation 100251. Up to 16560 conditions per place. [2024-06-03 19:29:29,214 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 176 selfloop transitions, 27 changer transitions 0/212 dead transitions. [2024-06-03 19:29:29,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 212 transitions, 1907 flow [2024-06-03 19:29:29,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:29:29,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:29:29,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-03 19:29:29,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46540880503144655 [2024-06-03 19:29:29,218 INFO L175 Difference]: Start difference. First operand has 114 places, 154 transitions, 1254 flow. Second operand 9 states and 222 transitions. [2024-06-03 19:29:29,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 212 transitions, 1907 flow [2024-06-03 19:29:29,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 212 transitions, 1794 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-03 19:29:29,407 INFO L231 Difference]: Finished difference. Result has 118 places, 162 transitions, 1334 flow [2024-06-03 19:29:29,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1334, PETRI_PLACES=118, PETRI_TRANSITIONS=162} [2024-06-03 19:29:29,408 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-06-03 19:29:29,408 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 162 transitions, 1334 flow [2024-06-03 19:29:29,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:29,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:29,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:29,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:29:29,409 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:29:29,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:29,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1139113246, now seen corresponding path program 3 times [2024-06-03 19:29:29,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:29,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162084614] [2024-06-03 19:29:29,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:29,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:29,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:30,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:30,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:30,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162084614] [2024-06-03 19:29:30,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162084614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:30,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:30,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:29:30,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475897176] [2024-06-03 19:29:30,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:30,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:29:30,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:30,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:29:30,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:29:30,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:29:30,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 162 transitions, 1334 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:30,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:30,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:29:30,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:33,133 INFO L124 PetriNetUnfolderBase]: 11868/16679 cut-off events. [2024-06-03 19:29:33,134 INFO L125 PetriNetUnfolderBase]: For 362091/362229 co-relation queries the response was YES. [2024-06-03 19:29:33,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103106 conditions, 16679 events. 11868/16679 cut-off events. For 362091/362229 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 94200 event pairs, 4942 based on Foata normal form. 12/16625 useless extension candidates. Maximal degree in co-relation 103060. Up to 15889 conditions per place. [2024-06-03 19:29:33,255 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 163 selfloop transitions, 28 changer transitions 0/206 dead transitions. [2024-06-03 19:29:33,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 206 transitions, 1908 flow [2024-06-03 19:29:33,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:29:33,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:29:33,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-03 19:29:33,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47877358490566035 [2024-06-03 19:29:33,257 INFO L175 Difference]: Start difference. First operand has 118 places, 162 transitions, 1334 flow. Second operand 8 states and 203 transitions. [2024-06-03 19:29:33,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 206 transitions, 1908 flow [2024-06-03 19:29:33,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 206 transitions, 1777 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-03 19:29:33,396 INFO L231 Difference]: Finished difference. Result has 120 places, 165 transitions, 1360 flow [2024-06-03 19:29:33,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1360, PETRI_PLACES=120, PETRI_TRANSITIONS=165} [2024-06-03 19:29:33,397 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 64 predicate places. [2024-06-03 19:29:33,397 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 165 transitions, 1360 flow [2024-06-03 19:29:33,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:33,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:33,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:33,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:29:33,397 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:29:33,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:33,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1152527066, now seen corresponding path program 2 times [2024-06-03 19:29:33,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:33,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776113473] [2024-06-03 19:29:33,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:33,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:34,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:34,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776113473] [2024-06-03 19:29:34,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776113473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:34,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:34,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:29:34,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144608426] [2024-06-03 19:29:34,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:34,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:29:34,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:34,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:29:34,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:29:35,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:29:35,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 165 transitions, 1360 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:35,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:35,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:29:35,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:37,504 INFO L124 PetriNetUnfolderBase]: 12471/17302 cut-off events. [2024-06-03 19:29:37,504 INFO L125 PetriNetUnfolderBase]: For 405525/405663 co-relation queries the response was YES. [2024-06-03 19:29:37,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108330 conditions, 17302 events. 12471/17302 cut-off events. For 405525/405663 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 94825 event pairs, 5152 based on Foata normal form. 3/17233 useless extension candidates. Maximal degree in co-relation 108283. Up to 16581 conditions per place. [2024-06-03 19:29:37,784 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 155 selfloop transitions, 52 changer transitions 0/216 dead transitions. [2024-06-03 19:29:37,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 216 transitions, 1998 flow [2024-06-03 19:29:37,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:29:37,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:29:37,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-03 19:29:37,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46750524109014674 [2024-06-03 19:29:37,786 INFO L175 Difference]: Start difference. First operand has 120 places, 165 transitions, 1360 flow. Second operand 9 states and 223 transitions. [2024-06-03 19:29:37,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 216 transitions, 1998 flow [2024-06-03 19:29:37,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 216 transitions, 1849 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-03 19:29:37,972 INFO L231 Difference]: Finished difference. Result has 123 places, 169 transitions, 1434 flow [2024-06-03 19:29:37,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1434, PETRI_PLACES=123, PETRI_TRANSITIONS=169} [2024-06-03 19:29:37,972 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 67 predicate places. [2024-06-03 19:29:37,972 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 169 transitions, 1434 flow [2024-06-03 19:29:37,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:37,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:37,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:37,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:29:37,973 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:29:37,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:37,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1152526818, now seen corresponding path program 1 times [2024-06-03 19:29:37,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:37,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904936977] [2024-06-03 19:29:37,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:37,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:39,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:39,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:39,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904936977] [2024-06-03 19:29:39,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904936977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:39,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:39,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:29:39,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329926105] [2024-06-03 19:29:39,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:39,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:29:39,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:39,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:29:39,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:29:39,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:29:39,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 169 transitions, 1434 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:39,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:39,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:29:39,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:41,896 INFO L124 PetriNetUnfolderBase]: 12752/17687 cut-off events. [2024-06-03 19:29:41,896 INFO L125 PetriNetUnfolderBase]: For 463117/463255 co-relation queries the response was YES. [2024-06-03 19:29:41,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114349 conditions, 17687 events. 12752/17687 cut-off events. For 463117/463255 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 96958 event pairs, 5163 based on Foata normal form. 30/17630 useless extension candidates. Maximal degree in co-relation 114302. Up to 16839 conditions per place. [2024-06-03 19:29:42,030 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 179 selfloop transitions, 38 changer transitions 0/226 dead transitions. [2024-06-03 19:29:42,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 226 transitions, 2124 flow [2024-06-03 19:29:42,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:29:42,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:29:42,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-03 19:29:42,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47379454926624737 [2024-06-03 19:29:42,032 INFO L175 Difference]: Start difference. First operand has 123 places, 169 transitions, 1434 flow. Second operand 9 states and 226 transitions. [2024-06-03 19:29:42,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 226 transitions, 2124 flow [2024-06-03 19:29:42,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 226 transitions, 1933 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-03 19:29:42,231 INFO L231 Difference]: Finished difference. Result has 125 places, 174 transitions, 1438 flow [2024-06-03 19:29:42,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1438, PETRI_PLACES=125, PETRI_TRANSITIONS=174} [2024-06-03 19:29:42,232 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-06-03 19:29:42,232 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 174 transitions, 1438 flow [2024-06-03 19:29:42,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:42,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:42,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:42,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:29:42,232 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:29:42,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:42,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1839616158, now seen corresponding path program 1 times [2024-06-03 19:29:42,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:42,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142537985] [2024-06-03 19:29:42,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:42,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:43,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:43,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142537985] [2024-06-03 19:29:43,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142537985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:43,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:43,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:29:43,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217038507] [2024-06-03 19:29:43,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:43,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:29:43,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:43,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:29:43,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:29:43,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:29:43,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 174 transitions, 1438 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:43,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:43,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:29:43,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:45,747 INFO L124 PetriNetUnfolderBase]: 12784/17736 cut-off events. [2024-06-03 19:29:45,747 INFO L125 PetriNetUnfolderBase]: For 499201/499361 co-relation queries the response was YES. [2024-06-03 19:29:45,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117660 conditions, 17736 events. 12784/17736 cut-off events. For 499201/499361 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 97266 event pairs, 5132 based on Foata normal form. 8/17653 useless extension candidates. Maximal degree in co-relation 117612. Up to 17130 conditions per place. [2024-06-03 19:29:46,016 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 175 selfloop transitions, 25 changer transitions 0/209 dead transitions. [2024-06-03 19:29:46,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 209 transitions, 2160 flow [2024-06-03 19:29:46,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:29:46,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:29:46,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-03 19:29:46,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779874213836478 [2024-06-03 19:29:46,017 INFO L175 Difference]: Start difference. First operand has 125 places, 174 transitions, 1438 flow. Second operand 6 states and 152 transitions. [2024-06-03 19:29:46,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 209 transitions, 2160 flow [2024-06-03 19:29:46,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 209 transitions, 2061 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-03 19:29:46,237 INFO L231 Difference]: Finished difference. Result has 124 places, 182 transitions, 1559 flow [2024-06-03 19:29:46,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1559, PETRI_PLACES=124, PETRI_TRANSITIONS=182} [2024-06-03 19:29:46,237 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 68 predicate places. [2024-06-03 19:29:46,237 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 182 transitions, 1559 flow [2024-06-03 19:29:46,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:46,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:46,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:46,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:29:46,238 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:29:46,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:46,238 INFO L85 PathProgramCache]: Analyzing trace with hash -436187874, now seen corresponding path program 4 times [2024-06-03 19:29:46,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:46,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749516157] [2024-06-03 19:29:46,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:46,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:47,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:47,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749516157] [2024-06-03 19:29:47,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749516157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:47,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:47,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:29:47,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296368099] [2024-06-03 19:29:47,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:47,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:29:47,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:47,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:29:47,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:29:47,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:29:47,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 182 transitions, 1559 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:47,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:47,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:29:47,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:50,210 INFO L124 PetriNetUnfolderBase]: 12192/17126 cut-off events. [2024-06-03 19:29:50,211 INFO L125 PetriNetUnfolderBase]: For 530569/530731 co-relation queries the response was YES. [2024-06-03 19:29:50,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118492 conditions, 17126 events. 12192/17126 cut-off events. For 530569/530731 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 96654 event pairs, 4832 based on Foata normal form. 18/17044 useless extension candidates. Maximal degree in co-relation 118443. Up to 16277 conditions per place. [2024-06-03 19:29:50,344 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 163 selfloop transitions, 46 changer transitions 0/224 dead transitions. [2024-06-03 19:29:50,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 224 transitions, 2179 flow [2024-06-03 19:29:50,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:29:50,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:29:50,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-03 19:29:50,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47877358490566035 [2024-06-03 19:29:50,346 INFO L175 Difference]: Start difference. First operand has 124 places, 182 transitions, 1559 flow. Second operand 8 states and 203 transitions. [2024-06-03 19:29:50,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 224 transitions, 2179 flow [2024-06-03 19:29:50,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 224 transitions, 2104 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-03 19:29:50,623 INFO L231 Difference]: Finished difference. Result has 130 places, 185 transitions, 1692 flow [2024-06-03 19:29:50,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1484, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1692, PETRI_PLACES=130, PETRI_TRANSITIONS=185} [2024-06-03 19:29:50,624 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-06-03 19:29:50,624 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 185 transitions, 1692 flow [2024-06-03 19:29:50,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:50,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:50,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:50,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:29:50,625 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:29:50,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:50,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1311186430, now seen corresponding path program 3 times [2024-06-03 19:29:50,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:50,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263932398] [2024-06-03 19:29:50,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:50,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:52,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:52,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263932398] [2024-06-03 19:29:52,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263932398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:52,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:52,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:29:52,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769976620] [2024-06-03 19:29:52,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:52,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:29:52,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:52,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:29:52,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:29:52,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:29:52,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 185 transitions, 1692 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:52,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:52,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:29:52,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:54,965 INFO L124 PetriNetUnfolderBase]: 12798/17764 cut-off events. [2024-06-03 19:29:54,965 INFO L125 PetriNetUnfolderBase]: For 576733/576895 co-relation queries the response was YES. [2024-06-03 19:29:55,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123813 conditions, 17764 events. 12798/17764 cut-off events. For 576733/576895 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 97440 event pairs, 5131 based on Foata normal form. 9/17681 useless extension candidates. Maximal degree in co-relation 123762. Up to 17014 conditions per place. [2024-06-03 19:29:55,136 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 177 selfloop transitions, 56 changer transitions 0/242 dead transitions. [2024-06-03 19:29:55,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 242 transitions, 2458 flow [2024-06-03 19:29:55,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:29:55,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:29:55,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-03 19:29:55,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46331236897274636 [2024-06-03 19:29:55,153 INFO L175 Difference]: Start difference. First operand has 130 places, 185 transitions, 1692 flow. Second operand 9 states and 221 transitions. [2024-06-03 19:29:55,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 242 transitions, 2458 flow [2024-06-03 19:29:55,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 242 transitions, 2241 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-03 19:29:55,474 INFO L231 Difference]: Finished difference. Result has 134 places, 197 transitions, 1809 flow [2024-06-03 19:29:55,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1497, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1809, PETRI_PLACES=134, PETRI_TRANSITIONS=197} [2024-06-03 19:29:55,474 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 78 predicate places. [2024-06-03 19:29:55,474 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 197 transitions, 1809 flow [2024-06-03 19:29:55,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:55,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:55,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:55,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:29:55,475 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:29:55,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:55,477 INFO L85 PathProgramCache]: Analyzing trace with hash -986894442, now seen corresponding path program 4 times [2024-06-03 19:29:55,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:55,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398033794] [2024-06-03 19:29:55,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:55,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:56,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:56,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398033794] [2024-06-03 19:29:56,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398033794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:56,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:56,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:29:56,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780048748] [2024-06-03 19:29:56,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:56,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:29:56,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:56,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:29:56,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:29:57,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:29:57,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 197 transitions, 1809 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:57,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:57,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:29:57,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:59,650 INFO L124 PetriNetUnfolderBase]: 12842/17832 cut-off events. [2024-06-03 19:29:59,651 INFO L125 PetriNetUnfolderBase]: For 627505/627667 co-relation queries the response was YES. [2024-06-03 19:29:59,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128193 conditions, 17832 events. 12842/17832 cut-off events. For 627505/627667 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 98047 event pairs, 5131 based on Foata normal form. 9/17749 useless extension candidates. Maximal degree in co-relation 128140. Up to 17067 conditions per place. [2024-06-03 19:29:59,796 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 183 selfloop transitions, 58 changer transitions 0/250 dead transitions. [2024-06-03 19:29:59,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 250 transitions, 2563 flow [2024-06-03 19:29:59,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:29:59,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:29:59,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-03 19:29:59,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46750524109014674 [2024-06-03 19:29:59,797 INFO L175 Difference]: Start difference. First operand has 134 places, 197 transitions, 1809 flow. Second operand 9 states and 223 transitions. [2024-06-03 19:29:59,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 250 transitions, 2563 flow [2024-06-03 19:30:00,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 250 transitions, 2347 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-03 19:30:00,096 INFO L231 Difference]: Finished difference. Result has 138 places, 205 transitions, 1882 flow [2024-06-03 19:30:00,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1882, PETRI_PLACES=138, PETRI_TRANSITIONS=205} [2024-06-03 19:30:00,096 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 82 predicate places. [2024-06-03 19:30:00,096 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 205 transitions, 1882 flow [2024-06-03 19:30:00,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:00,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:30:00,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:30:00,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:30:00,097 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:30:00,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:30:00,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1342737428, now seen corresponding path program 2 times [2024-06-03 19:30:00,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:30:00,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798851267] [2024-06-03 19:30:00,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:30:00,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:30:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:30:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:30:01,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:30:01,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798851267] [2024-06-03 19:30:01,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798851267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:30:01,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:30:01,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:30:01,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392780042] [2024-06-03 19:30:01,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:30:01,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:30:01,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:30:01,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:30:01,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:30:01,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:30:01,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 205 transitions, 1882 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:01,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:30:01,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:30:01,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand