./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix027_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix027_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix027_power.opt_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix027_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 16:07:22,468 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:07:22,529 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:07:22,532 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:07:22,533 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:07:22,554 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:07:22,554 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:07:22,555 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:07:22,555 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:07:22,559 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:07:22,560 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:07:22,560 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:07:22,560 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:07:22,560 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:07:22,560 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:07:22,561 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:07:22,561 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:07:22,561 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:07:22,561 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:07:22,561 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:07:22,561 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:07:22,562 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:07:22,562 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:07:22,562 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:07:22,562 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:07:22,563 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:07:22,563 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:07:22,563 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:07:22,563 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:07:22,564 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:07:22,564 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:07:22,565 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:07:22,565 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:07:22,565 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:07:22,566 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:07:22,566 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:07:22,566 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:07:22,566 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:07:22,566 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:07:22,567 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:07:22,567 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:07:22,567 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:07:22,567 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:07:22,567 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:07:22,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:07:22,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:07:22,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:07:22,785 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:07:22,785 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:07:22,786 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix027_power.opt_pso.opt_rmo.opt.i [2024-06-20 16:07:23,822 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:07:24,040 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:07:24,041 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix027_power.opt_pso.opt_rmo.opt.i [2024-06-20 16:07:24,059 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cd85bee7/de131d8faa6841529ea48c250f38e897/FLAGed00ea483 [2024-06-20 16:07:24,069 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cd85bee7/de131d8faa6841529ea48c250f38e897 [2024-06-20 16:07:24,071 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:07:24,071 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:07:24,072 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix027_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-20 16:07:24,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:07:24,218 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:07:24,219 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:07:24,219 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:07:24,223 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:07:24,224 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:07:24" (1/2) ... [2024-06-20 16:07:24,224 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dd18205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:07:24, skipping insertion in model container [2024-06-20 16:07:24,224 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:07:24" (1/2) ... [2024-06-20 16:07:24,226 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@241d3628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:07:24, skipping insertion in model container [2024-06-20 16:07:24,227 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:07:24" (2/2) ... [2024-06-20 16:07:24,227 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dd18205 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:07:24, skipping insertion in model container [2024-06-20 16:07:24,227 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:07:24" (2/2) ... [2024-06-20 16:07:24,227 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:07:24,355 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:07:24,357 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] (((((((((((((((((((((! multithreaded || y$flush_delayed == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! 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 || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0) [2024-06-20 16:07:24,357 INFO L97 edCorrectnessWitness]: Location invariant before [L862-L862] (((((((((((((((((((((! multithreaded || y$flush_delayed == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0) [2024-06-20 16:07:24,357 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((! multithreaded || y$flush_delayed == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! 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 || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0) [2024-06-20 16:07:24,357 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] (((((((((((((((((((((! multithreaded || y$flush_delayed == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0) [2024-06-20 16:07:24,358 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:07:24,358 INFO L106 edCorrectnessWitness]: ghost_update [L855-L855] multithreaded = 1; [2024-06-20 16:07:24,394 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:07:24,663 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:07:24,675 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:07:24,776 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:07:24,803 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:07:24,804 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:07:24 WrapperNode [2024-06-20 16:07:24,804 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:07:24,805 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:07:24,805 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:07:24,805 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:07:24,810 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:07:24" (1/1) ... [2024-06-20 16:07:24,825 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:07:24" (1/1) ... [2024-06-20 16:07:24,851 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 138 [2024-06-20 16:07:24,851 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:07:24,852 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:07:24,852 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:07:24,852 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:07:24,860 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:07:24" (1/1) ... [2024-06-20 16:07:24,861 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:07:24" (1/1) ... [2024-06-20 16:07:24,863 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:07:24" (1/1) ... [2024-06-20 16:07:24,882 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 16:07:24,882 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:07:24" (1/1) ... [2024-06-20 16:07:24,882 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:07:24" (1/1) ... [2024-06-20 16:07:24,891 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:07:24" (1/1) ... [2024-06-20 16:07:24,898 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:07:24" (1/1) ... [2024-06-20 16:07:24,901 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:07:24" (1/1) ... [2024-06-20 16:07:24,902 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:07:24" (1/1) ... [2024-06-20 16:07:24,911 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:07:24,911 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:07:24,911 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:07:24,911 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:07:24,912 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:07:24" (1/1) ... [2024-06-20 16:07:24,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:07:24,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:07:24,937 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 16:07:24,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 16:07:24,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:07:24,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:07:24,970 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:07:24,970 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:07:24,970 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:07:24,970 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:07:24,970 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:07:24,970 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:07:24,971 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-20 16:07:24,971 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-20 16:07:24,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:07:24,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:07:24,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:07:24,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:07:24,973 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:07:25,103 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:07:25,104 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:07:25,496 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:07:25,496 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:07:25,649 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:07:25,649 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:07:25,650 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:07:25 BoogieIcfgContainer [2024-06-20 16:07:25,650 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:07:25,652 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:07:25,652 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:07:25,654 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:07:25,654 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:07:24" (1/4) ... [2024-06-20 16:07:25,655 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d0d09ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:07:25, skipping insertion in model container [2024-06-20 16:07:25,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:07:24" (2/4) ... [2024-06-20 16:07:25,656 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d0d09ca and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:07:25, skipping insertion in model container [2024-06-20 16:07:25,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:07:24" (3/4) ... [2024-06-20 16:07:25,656 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d0d09ca and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:07:25, skipping insertion in model container [2024-06-20 16:07:25,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:07:25" (4/4) ... [2024-06-20 16:07:25,657 INFO L112 eAbstractionObserver]: Analyzing ICFG mix027_power.opt_pso.opt_rmo.opt.i [2024-06-20 16:07:25,669 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:07:25,670 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-20 16:07:25,670 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:07:25,739 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:07:25,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-20 16:07:25,838 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-20 16:07:25,838 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:07:25,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 86 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:07:25,840 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-20 16:07:25,843 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-20 16:07:25,855 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:07:25,862 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;@5fc8bf14, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:07:25,862 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-20 16:07:25,866 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:07:25,866 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:07:25,866 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:07:25,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:25,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:07:25,868 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)] === [2024-06-20 16:07:25,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:25,872 INFO L85 PathProgramCache]: Analyzing trace with hash 389343547, now seen corresponding path program 1 times [2024-06-20 16:07:25,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:25,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290658162] [2024-06-20 16:07:25,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:25,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:26,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:26,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:26,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290658162] [2024-06-20 16:07:26,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290658162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:26,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:26,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:07:26,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990562685] [2024-06-20 16:07:26,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:26,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:07:26,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:26,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:07:26,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:07:26,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-20 16:07:26,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:26,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:26,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-20 16:07:26,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:28,184 INFO L124 PetriNetUnfolderBase]: 8152/11675 cut-off events. [2024-06-20 16:07:28,184 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-06-20 16:07:28,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23162 conditions, 11675 events. 8152/11675 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 66021 event pairs, 6174 based on Foata normal form. 1/11317 useless extension candidates. Maximal degree in co-relation 23149. Up to 11108 conditions per place. [2024-06-20 16:07:28,259 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 42 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-20 16:07:28,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 227 flow [2024-06-20 16:07:28,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:07:28,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:07:28,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-06-20 16:07:28,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-20 16:07:28,271 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 99 transitions. [2024-06-20 16:07:28,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 227 flow [2024-06-20 16:07:28,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 16:07:28,277 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-20 16:07:28,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-20 16:07:28,282 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-20 16:07:28,282 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-20 16:07:28,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:28,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:28,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:28,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:07:28,284 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)] === [2024-06-20 16:07:28,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:28,284 INFO L85 PathProgramCache]: Analyzing trace with hash 497081622, now seen corresponding path program 1 times [2024-06-20 16:07:28,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:28,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759079514] [2024-06-20 16:07:28,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:28,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:29,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:29,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759079514] [2024-06-20 16:07:29,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759079514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:29,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:29,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:07:29,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882185961] [2024-06-20 16:07:29,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:29,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:07:29,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:29,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:07:29,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:07:29,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-20 16:07:29,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:29,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:29,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-20 16:07:29,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:30,359 INFO L124 PetriNetUnfolderBase]: 9537/13256 cut-off events. [2024-06-20 16:07:30,360 INFO L125 PetriNetUnfolderBase]: For 2493/2493 co-relation queries the response was YES. [2024-06-20 16:07:30,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30019 conditions, 13256 events. 9537/13256 cut-off events. For 2493/2493 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 72098 event pairs, 6489 based on Foata normal form. 4/13254 useless extension candidates. Maximal degree in co-relation 30007. Up to 12918 conditions per place. [2024-06-20 16:07:30,445 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 53 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-20 16:07:30,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 321 flow [2024-06-20 16:07:30,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:07:30,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:07:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-20 16:07:30,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057692307692307 [2024-06-20 16:07:30,447 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 126 transitions. [2024-06-20 16:07:30,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 321 flow [2024-06-20 16:07:30,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:07:30,450 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-20 16:07:30,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-20 16:07:30,451 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-20 16:07:30,451 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-20 16:07:30,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:30,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:30,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:30,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:07:30,452 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)] === [2024-06-20 16:07:30,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:30,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1770337902, now seen corresponding path program 1 times [2024-06-20 16:07:30,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:30,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702089215] [2024-06-20 16:07:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:30,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:31,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:31,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702089215] [2024-06-20 16:07:31,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702089215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:31,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:31,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:07:31,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223369607] [2024-06-20 16:07:31,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:31,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:07:31,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:31,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:07:31,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:07:31,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-20 16:07:31,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:31,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:31,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-20 16:07:31,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:32,620 INFO L124 PetriNetUnfolderBase]: 9583/13365 cut-off events. [2024-06-20 16:07:32,621 INFO L125 PetriNetUnfolderBase]: For 7144/7144 co-relation queries the response was YES. [2024-06-20 16:07:32,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33653 conditions, 13365 events. 9583/13365 cut-off events. For 7144/7144 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 72865 event pairs, 4658 based on Foata normal form. 10/13370 useless extension candidates. Maximal degree in co-relation 33639. Up to 12775 conditions per place. [2024-06-20 16:07:32,677 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 74 selfloop transitions, 21 changer transitions 0/103 dead transitions. [2024-06-20 16:07:32,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 103 transitions, 549 flow [2024-06-20 16:07:32,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:07:32,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:07:32,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 168 transitions. [2024-06-20 16:07:32,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6461538461538462 [2024-06-20 16:07:32,679 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 5 states and 168 transitions. [2024-06-20 16:07:32,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 103 transitions, 549 flow [2024-06-20 16:07:32,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 103 transitions, 530 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 16:07:32,683 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 310 flow [2024-06-20 16:07:32,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-06-20 16:07:32,683 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-20 16:07:32,684 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 310 flow [2024-06-20 16:07:32,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:32,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:32,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:32,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:07:32,684 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:07:32,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:32,685 INFO L85 PathProgramCache]: Analyzing trace with hash 2089576653, now seen corresponding path program 1 times [2024-06-20 16:07:32,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:32,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175537229] [2024-06-20 16:07:32,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:32,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:33,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:33,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175537229] [2024-06-20 16:07:33,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175537229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:33,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:33,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:07:33,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228711668] [2024-06-20 16:07:33,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:33,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:07:33,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:33,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:07:33,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:07:33,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-20 16:07:33,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:33,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:33,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-20 16:07:33,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:35,074 INFO L124 PetriNetUnfolderBase]: 9770/13654 cut-off events. [2024-06-20 16:07:35,074 INFO L125 PetriNetUnfolderBase]: For 17643/17643 co-relation queries the response was YES. [2024-06-20 16:07:35,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40263 conditions, 13654 events. 9770/13654 cut-off events. For 17643/17643 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 75024 event pairs, 3715 based on Foata normal form. 38/13687 useless extension candidates. Maximal degree in co-relation 40246. Up to 12776 conditions per place. [2024-06-20 16:07:35,137 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 85 selfloop transitions, 24 changer transitions 0/117 dead transitions. [2024-06-20 16:07:35,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 117 transitions, 708 flow [2024-06-20 16:07:35,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:07:35,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:07:35,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 197 transitions. [2024-06-20 16:07:35,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314102564102564 [2024-06-20 16:07:35,139 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 310 flow. Second operand 6 states and 197 transitions. [2024-06-20 16:07:35,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 117 transitions, 708 flow [2024-06-20 16:07:35,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 117 transitions, 696 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-20 16:07:35,146 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 379 flow [2024-06-20 16:07:35,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=379, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-20 16:07:35,147 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2024-06-20 16:07:35,147 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 379 flow [2024-06-20 16:07:35,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:35,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:35,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:35,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:07:35,148 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)] === [2024-06-20 16:07:35,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:35,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1631631860, now seen corresponding path program 1 times [2024-06-20 16:07:35,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:35,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745697830] [2024-06-20 16:07:35,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:35,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:35,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:35,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745697830] [2024-06-20 16:07:35,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745697830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:35,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:35,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:07:35,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114647116] [2024-06-20 16:07:35,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:35,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:07:35,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:35,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:07:35,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:07:35,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-20 16:07:35,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 379 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) [2024-06-20 16:07:35,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:35,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-20 16:07:35,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:37,128 INFO L124 PetriNetUnfolderBase]: 8357/12036 cut-off events. [2024-06-20 16:07:37,129 INFO L125 PetriNetUnfolderBase]: For 22129/22129 co-relation queries the response was YES. [2024-06-20 16:07:37,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37932 conditions, 12036 events. 8357/12036 cut-off events. For 22129/22129 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 68710 event pairs, 4047 based on Foata normal form. 6/11870 useless extension candidates. Maximal degree in co-relation 37911. Up to 11393 conditions per place. [2024-06-20 16:07:37,193 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 66 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-06-20 16:07:37,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 84 transitions, 577 flow [2024-06-20 16:07:37,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:07:37,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:07:37,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-20 16:07:37,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5076923076923077 [2024-06-20 16:07:37,196 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 379 flow. Second operand 5 states and 132 transitions. [2024-06-20 16:07:37,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 84 transitions, 577 flow [2024-06-20 16:07:37,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 84 transitions, 516 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 16:07:37,206 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 349 flow [2024-06-20 16:07:37,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=349, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2024-06-20 16:07:37,212 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-20 16:07:37,212 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 349 flow [2024-06-20 16:07:37,212 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) [2024-06-20 16:07:37,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:37,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:37,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:07:37,213 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)] === [2024-06-20 16:07:37,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:37,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1550863169, now seen corresponding path program 1 times [2024-06-20 16:07:37,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:37,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270370533] [2024-06-20 16:07:37,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:37,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:37,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:37,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270370533] [2024-06-20 16:07:37,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270370533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:37,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:37,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:07:37,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680843735] [2024-06-20 16:07:37,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:37,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:07:37,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:37,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:07:37,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:07:38,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:07:38,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 349 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:38,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:38,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:07:38,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:39,580 INFO L124 PetriNetUnfolderBase]: 9778/13646 cut-off events. [2024-06-20 16:07:39,580 INFO L125 PetriNetUnfolderBase]: For 29897/29897 co-relation queries the response was YES. [2024-06-20 16:07:39,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43802 conditions, 13646 events. 9778/13646 cut-off events. For 29897/29897 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 74599 event pairs, 4534 based on Foata normal form. 12/13654 useless extension candidates. Maximal degree in co-relation 43779. Up to 13062 conditions per place. [2024-06-20 16:07:39,654 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 71 selfloop transitions, 25 changer transitions 0/103 dead transitions. [2024-06-20 16:07:39,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 103 transitions, 684 flow [2024-06-20 16:07:39,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:07:39,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:07:39,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-20 16:07:39,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2024-06-20 16:07:39,656 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 349 flow. Second operand 6 states and 164 transitions. [2024-06-20 16:07:39,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 103 transitions, 684 flow [2024-06-20 16:07:39,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 103 transitions, 655 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 16:07:39,667 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 416 flow [2024-06-20 16:07:39,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=416, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2024-06-20 16:07:39,670 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-20 16:07:39,670 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 416 flow [2024-06-20 16:07:39,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:39,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:39,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:39,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:07:39,671 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)] === [2024-06-20 16:07:39,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:39,671 INFO L85 PathProgramCache]: Analyzing trace with hash 336356897, now seen corresponding path program 2 times [2024-06-20 16:07:39,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:39,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359127965] [2024-06-20 16:07:39,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:39,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:40,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:40,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359127965] [2024-06-20 16:07:40,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359127965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:40,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:40,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:07:40,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047572123] [2024-06-20 16:07:40,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:40,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:07:40,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:40,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:07:40,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:07:40,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:07:40,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 416 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:40,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:40,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:07:40,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:42,056 INFO L124 PetriNetUnfolderBase]: 9709/13518 cut-off events. [2024-06-20 16:07:42,057 INFO L125 PetriNetUnfolderBase]: For 35826/35826 co-relation queries the response was YES. [2024-06-20 16:07:42,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44655 conditions, 13518 events. 9709/13518 cut-off events. For 35826/35826 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 73557 event pairs, 4548 based on Foata normal form. 6/13518 useless extension candidates. Maximal degree in co-relation 44632. Up to 12969 conditions per place. [2024-06-20 16:07:42,143 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 64 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-20 16:07:42,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 97 transitions, 664 flow [2024-06-20 16:07:42,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:07:42,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:07:42,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-20 16:07:42,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2024-06-20 16:07:42,145 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 416 flow. Second operand 6 states and 159 transitions. [2024-06-20 16:07:42,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 97 transitions, 664 flow [2024-06-20 16:07:42,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 97 transitions, 621 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:07:42,161 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 436 flow [2024-06-20 16:07:42,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=436, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2024-06-20 16:07:42,162 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-06-20 16:07:42,162 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 436 flow [2024-06-20 16:07:42,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:42,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:42,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:42,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:07:42,163 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)] === [2024-06-20 16:07:42,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:42,163 INFO L85 PathProgramCache]: Analyzing trace with hash 470863009, now seen corresponding path program 1 times [2024-06-20 16:07:42,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:42,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142490618] [2024-06-20 16:07:42,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:42,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:43,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:43,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:43,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142490618] [2024-06-20 16:07:43,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142490618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:43,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:43,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:07:43,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52086282] [2024-06-20 16:07:43,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:43,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:07:43,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:43,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:07:43,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:07:43,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-20 16:07:43,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 436 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:43,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:43,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-20 16:07:43,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:44,940 INFO L124 PetriNetUnfolderBase]: 8299/11726 cut-off events. [2024-06-20 16:07:44,940 INFO L125 PetriNetUnfolderBase]: For 36673/36673 co-relation queries the response was YES. [2024-06-20 16:07:44,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39736 conditions, 11726 events. 8299/11726 cut-off events. For 36673/36673 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 65163 event pairs, 3868 based on Foata normal form. 6/11604 useless extension candidates. Maximal degree in co-relation 39712. Up to 11267 conditions per place. [2024-06-20 16:07:45,011 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 84 selfloop transitions, 17 changer transitions 0/109 dead transitions. [2024-06-20 16:07:45,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 109 transitions, 775 flow [2024-06-20 16:07:45,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:07:45,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:07:45,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 16:07:45,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49725274725274726 [2024-06-20 16:07:45,013 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 436 flow. Second operand 7 states and 181 transitions. [2024-06-20 16:07:45,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 109 transitions, 775 flow [2024-06-20 16:07:45,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 109 transitions, 684 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 16:07:45,038 INFO L231 Difference]: Finished difference. Result has 75 places, 77 transitions, 457 flow [2024-06-20 16:07:45,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=457, PETRI_PLACES=75, PETRI_TRANSITIONS=77} [2024-06-20 16:07:45,038 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 20 predicate places. [2024-06-20 16:07:45,038 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 77 transitions, 457 flow [2024-06-20 16:07:45,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:45,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:45,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:45,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:07:45,039 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:07:45,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:45,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1592886323, now seen corresponding path program 1 times [2024-06-20 16:07:45,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:45,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048752489] [2024-06-20 16:07:45,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:45,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:45,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:45,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:45,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048752489] [2024-06-20 16:07:45,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048752489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:45,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:45,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:07:45,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837192635] [2024-06-20 16:07:45,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:45,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:07:45,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:45,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:07:45,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:07:45,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-20 16:07:45,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 77 transitions, 457 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:45,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:45,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-20 16:07:45,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:47,002 INFO L124 PetriNetUnfolderBase]: 8292/12001 cut-off events. [2024-06-20 16:07:47,003 INFO L125 PetriNetUnfolderBase]: For 44545/44545 co-relation queries the response was YES. [2024-06-20 16:07:47,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42591 conditions, 12001 events. 8292/12001 cut-off events. For 44545/44545 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 68756 event pairs, 3960 based on Foata normal form. 2/11852 useless extension candidates. Maximal degree in co-relation 42565. Up to 11309 conditions per place. [2024-06-20 16:07:47,075 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 77 selfloop transitions, 10 changer transitions 0/95 dead transitions. [2024-06-20 16:07:47,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 95 transitions, 699 flow [2024-06-20 16:07:47,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:07:47,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:07:47,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-20 16:07:47,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48846153846153845 [2024-06-20 16:07:47,077 INFO L175 Difference]: Start difference. First operand has 75 places, 77 transitions, 457 flow. Second operand 5 states and 127 transitions. [2024-06-20 16:07:47,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 95 transitions, 699 flow [2024-06-20 16:07:47,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 95 transitions, 651 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 16:07:47,108 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 478 flow [2024-06-20 16:07:47,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=478, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-06-20 16:07:47,109 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-20 16:07:47,109 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 478 flow [2024-06-20 16:07:47,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:47,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:47,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:47,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:07:47,109 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)] === [2024-06-20 16:07:47,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:47,110 INFO L85 PathProgramCache]: Analyzing trace with hash -2118747305, now seen corresponding path program 1 times [2024-06-20 16:07:47,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:47,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445379796] [2024-06-20 16:07:47,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:47,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:47,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:47,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445379796] [2024-06-20 16:07:47,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445379796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:47,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:47,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:07:47,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062345888] [2024-06-20 16:07:47,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:47,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:07:47,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:47,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:07:47,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:07:48,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:07:48,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 478 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:48,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:48,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:07:48,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:49,338 INFO L124 PetriNetUnfolderBase]: 9690/13551 cut-off events. [2024-06-20 16:07:49,338 INFO L125 PetriNetUnfolderBase]: For 64845/64845 co-relation queries the response was YES. [2024-06-20 16:07:49,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51726 conditions, 13551 events. 9690/13551 cut-off events. For 64845/64845 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 74162 event pairs, 4708 based on Foata normal form. 3/13553 useless extension candidates. Maximal degree in co-relation 51699. Up to 13130 conditions per place. [2024-06-20 16:07:49,430 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 86 selfloop transitions, 22 changer transitions 0/115 dead transitions. [2024-06-20 16:07:49,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 115 transitions, 886 flow [2024-06-20 16:07:49,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:07:49,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:07:49,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 16:07:49,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-20 16:07:49,431 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 478 flow. Second operand 6 states and 150 transitions. [2024-06-20 16:07:49,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 115 transitions, 886 flow [2024-06-20 16:07:49,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 115 transitions, 847 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-20 16:07:49,460 INFO L231 Difference]: Finished difference. Result has 81 places, 95 transitions, 633 flow [2024-06-20 16:07:49,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=633, PETRI_PLACES=81, PETRI_TRANSITIONS=95} [2024-06-20 16:07:49,460 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 26 predicate places. [2024-06-20 16:07:49,460 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 95 transitions, 633 flow [2024-06-20 16:07:49,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:49,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:49,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:49,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:07:49,461 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)] === [2024-06-20 16:07:49,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:49,461 INFO L85 PathProgramCache]: Analyzing trace with hash 684012600, now seen corresponding path program 1 times [2024-06-20 16:07:49,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:49,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395014410] [2024-06-20 16:07:49,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:49,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:50,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:50,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395014410] [2024-06-20 16:07:50,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395014410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:50,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:50,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:07:50,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565601215] [2024-06-20 16:07:50,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:50,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:07:50,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:50,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:07:50,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:07:50,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:07:50,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 95 transitions, 633 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) [2024-06-20 16:07:50,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:50,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:07:50,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:52,080 INFO L124 PetriNetUnfolderBase]: 10747/14971 cut-off events. [2024-06-20 16:07:52,080 INFO L125 PetriNetUnfolderBase]: For 99523/99621 co-relation queries the response was YES. [2024-06-20 16:07:52,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62449 conditions, 14971 events. 10747/14971 cut-off events. For 99523/99621 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 82663 event pairs, 3572 based on Foata normal form. 24/14881 useless extension candidates. Maximal degree in co-relation 62419. Up to 13599 conditions per place. [2024-06-20 16:07:52,197 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 105 selfloop transitions, 32 changer transitions 0/147 dead transitions. [2024-06-20 16:07:52,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 147 transitions, 1155 flow [2024-06-20 16:07:52,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:07:52,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:07:52,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-20 16:07:52,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5302197802197802 [2024-06-20 16:07:52,199 INFO L175 Difference]: Start difference. First operand has 81 places, 95 transitions, 633 flow. Second operand 7 states and 193 transitions. [2024-06-20 16:07:52,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 147 transitions, 1155 flow [2024-06-20 16:07:52,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 147 transitions, 1121 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-20 16:07:52,260 INFO L231 Difference]: Finished difference. Result has 87 places, 99 transitions, 736 flow [2024-06-20 16:07:52,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=736, PETRI_PLACES=87, PETRI_TRANSITIONS=99} [2024-06-20 16:07:52,261 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 32 predicate places. [2024-06-20 16:07:52,261 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 99 transitions, 736 flow [2024-06-20 16:07:52,261 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) [2024-06-20 16:07:52,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:52,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:52,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:07:52,262 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)] === [2024-06-20 16:07:52,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:52,262 INFO L85 PathProgramCache]: Analyzing trace with hash 684073050, now seen corresponding path program 2 times [2024-06-20 16:07:52,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:52,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921664261] [2024-06-20 16:07:52,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:52,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:53,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:53,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:53,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921664261] [2024-06-20 16:07:53,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921664261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:53,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:53,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:07:53,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801507881] [2024-06-20 16:07:53,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:53,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:07:53,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:53,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:07:53,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:07:53,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:07:53,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 99 transitions, 736 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) [2024-06-20 16:07:53,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:53,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:07:53,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:54,883 INFO L124 PetriNetUnfolderBase]: 10835/15123 cut-off events. [2024-06-20 16:07:54,883 INFO L125 PetriNetUnfolderBase]: For 117099/117197 co-relation queries the response was YES. [2024-06-20 16:07:54,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65369 conditions, 15123 events. 10835/15123 cut-off events. For 117099/117197 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 83909 event pairs, 4561 based on Foata normal form. 36/15041 useless extension candidates. Maximal degree in co-relation 65336. Up to 14235 conditions per place. [2024-06-20 16:07:55,003 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 102 selfloop transitions, 31 changer transitions 0/143 dead transitions. [2024-06-20 16:07:55,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 143 transitions, 1154 flow [2024-06-20 16:07:55,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:07:55,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:07:55,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-20 16:07:55,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-20 16:07:55,017 INFO L175 Difference]: Start difference. First operand has 87 places, 99 transitions, 736 flow. Second operand 7 states and 189 transitions. [2024-06-20 16:07:55,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 143 transitions, 1154 flow [2024-06-20 16:07:55,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 143 transitions, 1099 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-20 16:07:55,116 INFO L231 Difference]: Finished difference. Result has 91 places, 102 transitions, 800 flow [2024-06-20 16:07:55,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=800, PETRI_PLACES=91, PETRI_TRANSITIONS=102} [2024-06-20 16:07:55,117 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 36 predicate places. [2024-06-20 16:07:55,117 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 102 transitions, 800 flow [2024-06-20 16:07:55,117 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) [2024-06-20 16:07:55,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:55,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:55,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:07:55,118 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:07:55,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:55,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1327828442, now seen corresponding path program 1 times [2024-06-20 16:07:55,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:55,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419830219] [2024-06-20 16:07:55,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:55,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:55,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:55,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419830219] [2024-06-20 16:07:55,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419830219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:55,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:55,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:07:55,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191382702] [2024-06-20 16:07:55,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:55,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:07:55,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:55,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:07:55,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:07:55,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:07:55,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 102 transitions, 800 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:55,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:55,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:07:55,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:57,484 INFO L124 PetriNetUnfolderBase]: 10842/15166 cut-off events. [2024-06-20 16:07:57,484 INFO L125 PetriNetUnfolderBase]: For 128339/128447 co-relation queries the response was YES. [2024-06-20 16:07:57,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67318 conditions, 15166 events. 10842/15166 cut-off events. For 128339/128447 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 84355 event pairs, 4841 based on Foata normal form. 2/15053 useless extension candidates. Maximal degree in co-relation 67283. Up to 14666 conditions per place. [2024-06-20 16:07:57,601 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 106 selfloop transitions, 14 changer transitions 0/130 dead transitions. [2024-06-20 16:07:57,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 130 transitions, 1148 flow [2024-06-20 16:07:57,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:07:57,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:07:57,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 16:07:57,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-20 16:07:57,603 INFO L175 Difference]: Start difference. First operand has 91 places, 102 transitions, 800 flow. Second operand 6 states and 150 transitions. [2024-06-20 16:07:57,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 130 transitions, 1148 flow [2024-06-20 16:07:57,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 1067 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 16:07:57,756 INFO L231 Difference]: Finished difference. Result has 92 places, 106 transitions, 810 flow [2024-06-20 16:07:57,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=719, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=810, PETRI_PLACES=92, PETRI_TRANSITIONS=106} [2024-06-20 16:07:57,757 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 37 predicate places. [2024-06-20 16:07:57,757 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 106 transitions, 810 flow [2024-06-20 16:07:57,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:57,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:57,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:57,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:07:57,757 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)] === [2024-06-20 16:07:57,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:57,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1291333986, now seen corresponding path program 1 times [2024-06-20 16:07:57,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:57,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300480808] [2024-06-20 16:07:57,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:57,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:58,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:58,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300480808] [2024-06-20 16:07:58,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300480808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:58,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:58,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:07:58,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310779984] [2024-06-20 16:07:58,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:58,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:07:58,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:58,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:07:58,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:07:58,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:07:58,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 106 transitions, 810 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:58,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:58,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:07:58,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:00,817 INFO L124 PetriNetUnfolderBase]: 10900/15220 cut-off events. [2024-06-20 16:08:00,817 INFO L125 PetriNetUnfolderBase]: For 148726/148850 co-relation queries the response was YES. [2024-06-20 16:08:00,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70538 conditions, 15220 events. 10900/15220 cut-off events. For 148726/148850 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 84226 event pairs, 4585 based on Foata normal form. 6/15106 useless extension candidates. Maximal degree in co-relation 70502. Up to 14509 conditions per place. [2024-06-20 16:08:00,947 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 108 selfloop transitions, 37 changer transitions 0/155 dead transitions. [2024-06-20 16:08:00,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 155 transitions, 1286 flow [2024-06-20 16:08:00,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:08:00,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:08:00,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-20 16:08:00,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49759615384615385 [2024-06-20 16:08:00,949 INFO L175 Difference]: Start difference. First operand has 92 places, 106 transitions, 810 flow. Second operand 8 states and 207 transitions. [2024-06-20 16:08:00,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 155 transitions, 1286 flow [2024-06-20 16:08:01,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 155 transitions, 1225 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-20 16:08:01,059 INFO L231 Difference]: Finished difference. Result has 97 places, 114 transitions, 926 flow [2024-06-20 16:08:01,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=926, PETRI_PLACES=97, PETRI_TRANSITIONS=114} [2024-06-20 16:08:01,059 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2024-06-20 16:08:01,060 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 114 transitions, 926 flow [2024-06-20 16:08:01,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:01,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:01,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:01,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:08:01,060 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:08:01,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:01,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1527509346, now seen corresponding path program 2 times [2024-06-20 16:08:01,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:01,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91304347] [2024-06-20 16:08:01,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:01,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:02,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:02,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91304347] [2024-06-20 16:08:02,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91304347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:02,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:02,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:08:02,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354835223] [2024-06-20 16:08:02,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:02,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:08:02,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:02,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:08:02,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:08:02,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:08:02,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 114 transitions, 926 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:02,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:02,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:08:02,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:04,072 INFO L124 PetriNetUnfolderBase]: 10885/15203 cut-off events. [2024-06-20 16:08:04,072 INFO L125 PetriNetUnfolderBase]: For 167750/167874 co-relation queries the response was YES. [2024-06-20 16:08:04,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73187 conditions, 15203 events. 10885/15203 cut-off events. For 167750/167874 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 84137 event pairs, 4582 based on Foata normal form. 6/15090 useless extension candidates. Maximal degree in co-relation 73149. Up to 14488 conditions per place. [2024-06-20 16:08:04,173 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 110 selfloop transitions, 45 changer transitions 0/165 dead transitions. [2024-06-20 16:08:04,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 165 transitions, 1468 flow [2024-06-20 16:08:04,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:08:04,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:08:04,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-20 16:08:04,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49759615384615385 [2024-06-20 16:08:04,175 INFO L175 Difference]: Start difference. First operand has 97 places, 114 transitions, 926 flow. Second operand 8 states and 207 transitions. [2024-06-20 16:08:04,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 165 transitions, 1468 flow [2024-06-20 16:08:04,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 165 transitions, 1348 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 16:08:04,295 INFO L231 Difference]: Finished difference. Result has 101 places, 125 transitions, 1055 flow [2024-06-20 16:08:04,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1055, PETRI_PLACES=101, PETRI_TRANSITIONS=125} [2024-06-20 16:08:04,296 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2024-06-20 16:08:04,296 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 125 transitions, 1055 flow [2024-06-20 16:08:04,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:04,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:04,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:04,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:08:04,297 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)] === [2024-06-20 16:08:04,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:04,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1527806016, now seen corresponding path program 3 times [2024-06-20 16:08:04,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:04,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694270725] [2024-06-20 16:08:04,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:04,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:05,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:05,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694270725] [2024-06-20 16:08:05,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694270725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:05,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:05,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:08:05,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064878382] [2024-06-20 16:08:05,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:05,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:08:05,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:05,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:08:05,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:08:05,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:08:05,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 125 transitions, 1055 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:05,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:05,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:08:05,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:07,383 INFO L124 PetriNetUnfolderBase]: 10962/15338 cut-off events. [2024-06-20 16:08:07,383 INFO L125 PetriNetUnfolderBase]: For 188038/188162 co-relation queries the response was YES. [2024-06-20 16:08:07,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75958 conditions, 15338 events. 10962/15338 cut-off events. For 188038/188162 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 85221 event pairs, 4128 based on Foata normal form. 6/15225 useless extension candidates. Maximal degree in co-relation 75918. Up to 14327 conditions per place. [2024-06-20 16:08:07,476 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 108 selfloop transitions, 56 changer transitions 0/174 dead transitions. [2024-06-20 16:08:07,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 174 transitions, 1569 flow [2024-06-20 16:08:07,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:08:07,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:08:07,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-20 16:08:07,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072115384615384 [2024-06-20 16:08:07,478 INFO L175 Difference]: Start difference. First operand has 101 places, 125 transitions, 1055 flow. Second operand 8 states and 211 transitions. [2024-06-20 16:08:07,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 174 transitions, 1569 flow [2024-06-20 16:08:07,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 174 transitions, 1473 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-20 16:08:07,598 INFO L231 Difference]: Finished difference. Result has 107 places, 130 transitions, 1176 flow [2024-06-20 16:08:07,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=961, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1176, PETRI_PLACES=107, PETRI_TRANSITIONS=130} [2024-06-20 16:08:07,599 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 52 predicate places. [2024-06-20 16:08:07,599 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 130 transitions, 1176 flow [2024-06-20 16:08:07,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:07,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:07,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:07,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:08:07,600 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:08:07,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:07,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1755370900, now seen corresponding path program 2 times [2024-06-20 16:08:07,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:07,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187796066] [2024-06-20 16:08:07,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:07,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:08,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:08,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:08,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187796066] [2024-06-20 16:08:08,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187796066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:08,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:08,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:08:08,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669277456] [2024-06-20 16:08:08,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:08,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:08:08,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:08,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:08:08,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:08:08,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:08:08,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 130 transitions, 1176 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:08,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:08,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:08:08,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:10,081 INFO L124 PetriNetUnfolderBase]: 10955/15356 cut-off events. [2024-06-20 16:08:10,081 INFO L125 PetriNetUnfolderBase]: For 210006/210139 co-relation queries the response was YES. [2024-06-20 16:08:10,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78062 conditions, 15356 events. 10955/15356 cut-off events. For 210006/210139 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 85543 event pairs, 4589 based on Foata normal form. 10/15250 useless extension candidates. Maximal degree in co-relation 78020. Up to 14819 conditions per place. [2024-06-20 16:08:10,235 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 121 selfloop transitions, 21 changer transitions 0/152 dead transitions. [2024-06-20 16:08:10,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 152 transitions, 1568 flow [2024-06-20 16:08:10,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:08:10,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:08:10,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-20 16:08:10,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-20 16:08:10,237 INFO L175 Difference]: Start difference. First operand has 107 places, 130 transitions, 1176 flow. Second operand 6 states and 146 transitions. [2024-06-20 16:08:10,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 152 transitions, 1568 flow [2024-06-20 16:08:10,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 152 transitions, 1433 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 16:08:10,468 INFO L231 Difference]: Finished difference. Result has 108 places, 134 transitions, 1162 flow [2024-06-20 16:08:10,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1162, PETRI_PLACES=108, PETRI_TRANSITIONS=134} [2024-06-20 16:08:10,468 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2024-06-20 16:08:10,468 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 134 transitions, 1162 flow [2024-06-20 16:08:10,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:10,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:10,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:10,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:08:10,469 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:08:10,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:10,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1691399896, now seen corresponding path program 1 times [2024-06-20 16:08:10,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:10,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668870794] [2024-06-20 16:08:10,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:10,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:11,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:11,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:11,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668870794] [2024-06-20 16:08:11,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668870794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:11,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:11,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:08:11,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743177180] [2024-06-20 16:08:11,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:11,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:08:11,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:11,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:08:11,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:08:11,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-20 16:08:11,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 134 transitions, 1162 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:11,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:11,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-20 16:08:11,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:12,837 INFO L124 PetriNetUnfolderBase]: 9595/13819 cut-off events. [2024-06-20 16:08:12,837 INFO L125 PetriNetUnfolderBase]: For 202844/202990 co-relation queries the response was YES. [2024-06-20 16:08:12,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71959 conditions, 13819 events. 9595/13819 cut-off events. For 202844/202990 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 80090 event pairs, 3819 based on Foata normal form. 4/13645 useless extension candidates. Maximal degree in co-relation 71916. Up to 13035 conditions per place. [2024-06-20 16:08:12,968 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 135 selfloop transitions, 14 changer transitions 0/160 dead transitions. [2024-06-20 16:08:12,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 160 transitions, 1570 flow [2024-06-20 16:08:12,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:08:12,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:08:12,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 16:08:12,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49038461538461536 [2024-06-20 16:08:12,971 INFO L175 Difference]: Start difference. First operand has 108 places, 134 transitions, 1162 flow. Second operand 6 states and 153 transitions. [2024-06-20 16:08:12,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 160 transitions, 1570 flow [2024-06-20 16:08:13,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 160 transitions, 1479 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-20 16:08:13,170 INFO L231 Difference]: Finished difference. Result has 110 places, 138 transitions, 1166 flow [2024-06-20 16:08:13,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1166, PETRI_PLACES=110, PETRI_TRANSITIONS=138} [2024-06-20 16:08:13,171 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 55 predicate places. [2024-06-20 16:08:13,171 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 138 transitions, 1166 flow [2024-06-20 16:08:13,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:13,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:13,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:13,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:08:13,172 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:08:13,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:13,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1755364948, now seen corresponding path program 2 times [2024-06-20 16:08:13,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:13,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260809518] [2024-06-20 16:08:13,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:13,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:13,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:13,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260809518] [2024-06-20 16:08:13,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260809518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:13,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:13,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:08:13,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528438440] [2024-06-20 16:08:13,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:13,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:08:13,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:13,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:08:13,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:08:14,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-20 16:08:14,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 138 transitions, 1166 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:14,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:14,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-20 16:08:14,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:15,627 INFO L124 PetriNetUnfolderBase]: 9604/13838 cut-off events. [2024-06-20 16:08:15,627 INFO L125 PetriNetUnfolderBase]: For 224300/224467 co-relation queries the response was YES. [2024-06-20 16:08:15,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74960 conditions, 13838 events. 9604/13838 cut-off events. For 224300/224467 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 80370 event pairs, 3826 based on Foata normal form. 8/13667 useless extension candidates. Maximal degree in co-relation 74916. Up to 13020 conditions per place. [2024-06-20 16:08:15,742 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 130 selfloop transitions, 21 changer transitions 0/162 dead transitions. [2024-06-20 16:08:15,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 162 transitions, 1584 flow [2024-06-20 16:08:15,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:08:15,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:08:15,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 16:08:15,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49038461538461536 [2024-06-20 16:08:15,743 INFO L175 Difference]: Start difference. First operand has 110 places, 138 transitions, 1166 flow. Second operand 6 states and 153 transitions. [2024-06-20 16:08:15,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 162 transitions, 1584 flow [2024-06-20 16:08:15,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 162 transitions, 1519 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 16:08:15,922 INFO L231 Difference]: Finished difference. Result has 112 places, 142 transitions, 1218 flow [2024-06-20 16:08:15,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1218, PETRI_PLACES=112, PETRI_TRANSITIONS=142} [2024-06-20 16:08:15,922 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 57 predicate places. [2024-06-20 16:08:15,922 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 142 transitions, 1218 flow [2024-06-20 16:08:15,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:15,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:15,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:15,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:08:15,923 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:08:15,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:15,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1755357012, now seen corresponding path program 1 times [2024-06-20 16:08:15,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:15,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583148241] [2024-06-20 16:08:15,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:15,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:17,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:17,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:17,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583148241] [2024-06-20 16:08:17,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583148241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:17,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:17,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:17,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070400277] [2024-06-20 16:08:17,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:17,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:17,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:17,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:17,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:17,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:08:17,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 142 transitions, 1218 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:17,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:17,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:08:17,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:18,788 INFO L124 PetriNetUnfolderBase]: 10271/14539 cut-off events. [2024-06-20 16:08:18,788 INFO L125 PetriNetUnfolderBase]: For 274063/274063 co-relation queries the response was YES. [2024-06-20 16:08:18,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82927 conditions, 14539 events. 10271/14539 cut-off events. For 274063/274063 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 81645 event pairs, 4266 based on Foata normal form. 3/14541 useless extension candidates. Maximal degree in co-relation 82882. Up to 13979 conditions per place. [2024-06-20 16:08:18,900 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 137 selfloop transitions, 27 changer transitions 0/171 dead transitions. [2024-06-20 16:08:18,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 171 transitions, 1750 flow [2024-06-20 16:08:18,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:18,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:18,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 16:08:18,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2024-06-20 16:08:18,902 INFO L175 Difference]: Start difference. First operand has 112 places, 142 transitions, 1218 flow. Second operand 7 states and 172 transitions. [2024-06-20 16:08:18,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 171 transitions, 1750 flow [2024-06-20 16:08:19,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 171 transitions, 1663 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-20 16:08:19,067 INFO L231 Difference]: Finished difference. Result has 115 places, 147 transitions, 1273 flow [2024-06-20 16:08:19,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1273, PETRI_PLACES=115, PETRI_TRANSITIONS=147} [2024-06-20 16:08:19,068 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-20 16:08:19,068 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 147 transitions, 1273 flow [2024-06-20 16:08:19,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:19,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:19,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:19,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:08:19,069 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:08:19,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:19,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1063516318, now seen corresponding path program 1 times [2024-06-20 16:08:19,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:19,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015487709] [2024-06-20 16:08:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:19,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:19,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:19,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:19,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015487709] [2024-06-20 16:08:19,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015487709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:19,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:19,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:19,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68445130] [2024-06-20 16:08:19,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:19,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:19,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:19,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:19,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:19,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:08:19,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 147 transitions, 1273 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:19,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:19,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:08:19,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:21,848 INFO L124 PetriNetUnfolderBase]: 11096/15519 cut-off events. [2024-06-20 16:08:21,848 INFO L125 PetriNetUnfolderBase]: For 346721/346793 co-relation queries the response was YES. [2024-06-20 16:08:21,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94254 conditions, 15519 events. 11096/15519 cut-off events. For 346721/346793 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 85919 event pairs, 4679 based on Foata normal form. 11/15412 useless extension candidates. Maximal degree in co-relation 94208. Up to 14821 conditions per place. [2024-06-20 16:08:21,972 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 149 selfloop transitions, 31 changer transitions 0/191 dead transitions. [2024-06-20 16:08:21,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 191 transitions, 1829 flow [2024-06-20 16:08:21,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:21,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:21,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-20 16:08:21,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027472527472527 [2024-06-20 16:08:21,974 INFO L175 Difference]: Start difference. First operand has 115 places, 147 transitions, 1273 flow. Second operand 7 states and 183 transitions. [2024-06-20 16:08:21,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 191 transitions, 1829 flow [2024-06-20 16:08:22,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 191 transitions, 1723 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 16:08:22,248 INFO L231 Difference]: Finished difference. Result has 118 places, 156 transitions, 1367 flow [2024-06-20 16:08:22,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1367, PETRI_PLACES=118, PETRI_TRANSITIONS=156} [2024-06-20 16:08:22,248 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2024-06-20 16:08:22,248 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 156 transitions, 1367 flow [2024-06-20 16:08:22,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:22,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:22,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:22,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:08:22,249 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:08:22,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:22,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1173810564, now seen corresponding path program 1 times [2024-06-20 16:08:22,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:22,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604141712] [2024-06-20 16:08:22,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:22,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:23,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:23,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604141712] [2024-06-20 16:08:23,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604141712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:23,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:23,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:08:23,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269898687] [2024-06-20 16:08:23,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:23,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:08:23,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:23,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:08:23,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:08:23,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:08:23,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 156 transitions, 1367 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) [2024-06-20 16:08:23,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:23,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:08:23,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:25,658 INFO L124 PetriNetUnfolderBase]: 11350/15916 cut-off events. [2024-06-20 16:08:25,658 INFO L125 PetriNetUnfolderBase]: For 389956/390029 co-relation queries the response was YES. [2024-06-20 16:08:25,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100983 conditions, 15916 events. 11350/15916 cut-off events. For 389956/390029 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 88891 event pairs, 4688 based on Foata normal form. 19/15809 useless extension candidates. Maximal degree in co-relation 100935. Up to 14611 conditions per place. [2024-06-20 16:08:25,784 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 148 selfloop transitions, 53 changer transitions 0/212 dead transitions. [2024-06-20 16:08:25,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 212 transitions, 1999 flow [2024-06-20 16:08:25,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:08:25,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:08:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-20 16:08:25,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2024-06-20 16:08:25,786 INFO L175 Difference]: Start difference. First operand has 118 places, 156 transitions, 1367 flow. Second operand 8 states and 212 transitions. [2024-06-20 16:08:25,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 212 transitions, 1999 flow [2024-06-20 16:08:25,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 212 transitions, 1889 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-20 16:08:25,987 INFO L231 Difference]: Finished difference. Result has 123 places, 164 transitions, 1488 flow [2024-06-20 16:08:25,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1488, PETRI_PLACES=123, PETRI_TRANSITIONS=164} [2024-06-20 16:08:25,987 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2024-06-20 16:08:25,987 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 164 transitions, 1488 flow [2024-06-20 16:08:25,987 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) [2024-06-20 16:08:25,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:25,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:25,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:08:25,988 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:08:25,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:25,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1063815220, now seen corresponding path program 1 times [2024-06-20 16:08:25,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:25,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394892078] [2024-06-20 16:08:25,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:25,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:26,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:26,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:26,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394892078] [2024-06-20 16:08:26,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394892078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:26,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:26,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:26,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992277031] [2024-06-20 16:08:26,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:26,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:26,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:26,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:26,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:26,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:08:26,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 164 transitions, 1488 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:26,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:26,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:08:26,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:29,063 INFO L124 PetriNetUnfolderBase]: 12004/16560 cut-off events. [2024-06-20 16:08:29,063 INFO L125 PetriNetUnfolderBase]: For 413374/413374 co-relation queries the response was YES. [2024-06-20 16:08:29,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105987 conditions, 16560 events. 12004/16560 cut-off events. For 413374/413374 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 89882 event pairs, 4994 based on Foata normal form. 3/16562 useless extension candidates. Maximal degree in co-relation 105938. Up to 16296 conditions per place. [2024-06-20 16:08:29,196 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 174 selfloop transitions, 29 changer transitions 0/209 dead transitions. [2024-06-20 16:08:29,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 209 transitions, 2316 flow [2024-06-20 16:08:29,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:29,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:29,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 16:08:29,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47527472527472525 [2024-06-20 16:08:29,197 INFO L175 Difference]: Start difference. First operand has 123 places, 164 transitions, 1488 flow. Second operand 7 states and 173 transitions. [2024-06-20 16:08:29,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 209 transitions, 2316 flow [2024-06-20 16:08:29,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 209 transitions, 2226 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-20 16:08:29,424 INFO L231 Difference]: Finished difference. Result has 129 places, 178 transitions, 1713 flow [2024-06-20 16:08:29,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1398, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1713, PETRI_PLACES=129, PETRI_TRANSITIONS=178} [2024-06-20 16:08:29,425 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 74 predicate places. [2024-06-20 16:08:29,425 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 178 transitions, 1713 flow [2024-06-20 16:08:29,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:29,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:29,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:29,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:08:29,425 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:08:29,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:29,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1063814848, now seen corresponding path program 2 times [2024-06-20 16:08:29,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:29,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495720035] [2024-06-20 16:08:29,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:29,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:30,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:30,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495720035] [2024-06-20 16:08:30,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495720035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:30,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:30,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:30,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458990820] [2024-06-20 16:08:30,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:30,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:30,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:30,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:30,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:30,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:08:30,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 178 transitions, 1713 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:30,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:30,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:08:30,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:32,699 INFO L124 PetriNetUnfolderBase]: 11660/16318 cut-off events. [2024-06-20 16:08:32,699 INFO L125 PetriNetUnfolderBase]: For 470711/470897 co-relation queries the response was YES. [2024-06-20 16:08:32,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110342 conditions, 16318 events. 11660/16318 cut-off events. For 470711/470897 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 90857 event pairs, 4675 based on Foata normal form. 11/16177 useless extension candidates. Maximal degree in co-relation 110290. Up to 15450 conditions per place. [2024-06-20 16:08:32,841 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 167 selfloop transitions, 39 changer transitions 0/220 dead transitions. [2024-06-20 16:08:32,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 220 transitions, 2489 flow [2024-06-20 16:08:32,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:32,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:32,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 16:08:32,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49725274725274726 [2024-06-20 16:08:32,843 INFO L175 Difference]: Start difference. First operand has 129 places, 178 transitions, 1713 flow. Second operand 7 states and 181 transitions. [2024-06-20 16:08:32,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 220 transitions, 2489 flow [2024-06-20 16:08:33,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 220 transitions, 2391 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-06-20 16:08:33,208 INFO L231 Difference]: Finished difference. Result has 135 places, 188 transitions, 1913 flow [2024-06-20 16:08:33,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1615, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1913, PETRI_PLACES=135, PETRI_TRANSITIONS=188} [2024-06-20 16:08:33,209 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 80 predicate places. [2024-06-20 16:08:33,209 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 188 transitions, 1913 flow [2024-06-20 16:08:33,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:33,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:33,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:33,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:08:33,209 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)] === [2024-06-20 16:08:33,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:33,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1494131706, now seen corresponding path program 2 times [2024-06-20 16:08:33,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:33,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14273414] [2024-06-20 16:08:33,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:33,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:34,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:34,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:34,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14273414] [2024-06-20 16:08:34,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14273414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:34,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:34,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:08:34,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494197009] [2024-06-20 16:08:34,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:34,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:08:34,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:34,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:08:34,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:08:34,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:08:34,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 188 transitions, 1913 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) [2024-06-20 16:08:34,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:34,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:08:34,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:36,685 INFO L124 PetriNetUnfolderBase]: 11653/16290 cut-off events. [2024-06-20 16:08:36,685 INFO L125 PetriNetUnfolderBase]: For 526491/526682 co-relation queries the response was YES. [2024-06-20 16:08:36,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115269 conditions, 16290 events. 11653/16290 cut-off events. For 526491/526682 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 90397 event pairs, 3431 based on Foata normal form. 19/16135 useless extension candidates. Maximal degree in co-relation 115214. Up to 14284 conditions per place. [2024-06-20 16:08:36,856 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 155 selfloop transitions, 61 changer transitions 0/230 dead transitions. [2024-06-20 16:08:36,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 230 transitions, 2477 flow [2024-06-20 16:08:36,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:36,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:36,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-20 16:08:36,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-20 16:08:36,857 INFO L175 Difference]: Start difference. First operand has 135 places, 188 transitions, 1913 flow. Second operand 7 states and 189 transitions. [2024-06-20 16:08:36,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 230 transitions, 2477 flow [2024-06-20 16:08:37,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 230 transitions, 2342 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-20 16:08:37,477 INFO L231 Difference]: Finished difference. Result has 139 places, 188 transitions, 1913 flow [2024-06-20 16:08:37,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1913, PETRI_PLACES=139, PETRI_TRANSITIONS=188} [2024-06-20 16:08:37,477 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 84 predicate places. [2024-06-20 16:08:37,477 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 188 transitions, 1913 flow [2024-06-20 16:08:37,478 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) [2024-06-20 16:08:37,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:37,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:37,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:08:37,478 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)] === [2024-06-20 16:08:37,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:37,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1503328476, now seen corresponding path program 3 times [2024-06-20 16:08:37,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:37,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983349437] [2024-06-20 16:08:37,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:37,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:38,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:38,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:38,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983349437] [2024-06-20 16:08:38,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983349437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:38,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:38,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:08:38,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748648454] [2024-06-20 16:08:38,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:38,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:08:38,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:38,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:08:38,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:08:38,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:08:38,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 188 transitions, 1913 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) [2024-06-20 16:08:38,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:38,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:08:38,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:41,366 INFO L124 PetriNetUnfolderBase]: 11592/16206 cut-off events. [2024-06-20 16:08:41,366 INFO L125 PetriNetUnfolderBase]: For 548414/548605 co-relation queries the response was YES. [2024-06-20 16:08:41,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115658 conditions, 16206 events. 11592/16206 cut-off events. For 548414/548605 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 89902 event pairs, 2891 based on Foata normal form. 19/16059 useless extension candidates. Maximal degree in co-relation 115601. Up to 14015 conditions per place. [2024-06-20 16:08:41,532 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 149 selfloop transitions, 63 changer transitions 0/226 dead transitions. [2024-06-20 16:08:41,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 226 transitions, 2479 flow [2024-06-20 16:08:41,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:41,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:41,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 16:08:41,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 16:08:41,536 INFO L175 Difference]: Start difference. First operand has 139 places, 188 transitions, 1913 flow. Second operand 7 states and 182 transitions. [2024-06-20 16:08:41,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 226 transitions, 2479 flow [2024-06-20 16:08:41,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 226 transitions, 2317 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 16:08:41,871 INFO L231 Difference]: Finished difference. Result has 139 places, 189 transitions, 1912 flow [2024-06-20 16:08:41,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1912, PETRI_PLACES=139, PETRI_TRANSITIONS=189} [2024-06-20 16:08:41,871 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 84 predicate places. [2024-06-20 16:08:41,872 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 189 transitions, 1912 flow [2024-06-20 16:08:41,872 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) [2024-06-20 16:08:41,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:41,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:41,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:08:41,872 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:08:41,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:41,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1418078260, now seen corresponding path program 2 times [2024-06-20 16:08:41,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:41,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054850337] [2024-06-20 16:08:41,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:41,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:42,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:42,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054850337] [2024-06-20 16:08:42,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054850337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:42,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:42,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:42,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960551040] [2024-06-20 16:08:42,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:42,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:42,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:42,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:42,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:42,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:08:42,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 189 transitions, 1912 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:42,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:42,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:08:42,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:45,060 INFO L124 PetriNetUnfolderBase]: 12102/16714 cut-off events. [2024-06-20 16:08:45,061 INFO L125 PetriNetUnfolderBase]: For 543470/543480 co-relation queries the response was YES. [2024-06-20 16:08:45,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118644 conditions, 16714 events. 12102/16714 cut-off events. For 543470/543480 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 90962 event pairs, 4936 based on Foata normal form. 11/16723 useless extension candidates. Maximal degree in co-relation 118586. Up to 16327 conditions per place. [2024-06-20 16:08:45,248 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 173 selfloop transitions, 49 changer transitions 0/228 dead transitions. [2024-06-20 16:08:45,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 228 transitions, 2868 flow [2024-06-20 16:08:45,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:08:45,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:08:45,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-20 16:08:45,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-20 16:08:45,249 INFO L175 Difference]: Start difference. First operand has 139 places, 189 transitions, 1912 flow. Second operand 8 states and 184 transitions. [2024-06-20 16:08:45,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 228 transitions, 2868 flow [2024-06-20 16:08:45,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 228 transitions, 2701 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 16:08:45,595 INFO L231 Difference]: Finished difference. Result has 144 places, 201 transitions, 2080 flow [2024-06-20 16:08:45,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1745, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2080, PETRI_PLACES=144, PETRI_TRANSITIONS=201} [2024-06-20 16:08:45,596 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 89 predicate places. [2024-06-20 16:08:45,596 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 201 transitions, 2080 flow [2024-06-20 16:08:45,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:45,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:45,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:45,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:08:45,597 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:08:45,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:45,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1418077888, now seen corresponding path program 3 times [2024-06-20 16:08:45,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:45,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294762008] [2024-06-20 16:08:45,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:45,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:46,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:46,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294762008] [2024-06-20 16:08:46,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294762008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:46,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:46,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:46,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848437809] [2024-06-20 16:08:46,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:46,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:46,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:46,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:46,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:46,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:08:46,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 201 transitions, 2080 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:46,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:46,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:08:46,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:48,865 INFO L124 PetriNetUnfolderBase]: 11689/16365 cut-off events. [2024-06-20 16:08:48,866 INFO L125 PetriNetUnfolderBase]: For 600745/601037 co-relation queries the response was YES. [2024-06-20 16:08:48,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121173 conditions, 16365 events. 11689/16365 cut-off events. For 600745/601037 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 90954 event pairs, 4686 based on Foata normal form. 17/16226 useless extension candidates. Maximal degree in co-relation 121112. Up to 15314 conditions per place. [2024-06-20 16:08:49,042 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 166 selfloop transitions, 58 changer transitions 0/240 dead transitions. [2024-06-20 16:08:49,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 240 transitions, 3042 flow [2024-06-20 16:08:49,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:49,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 16:08:49,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2024-06-20 16:08:49,043 INFO L175 Difference]: Start difference. First operand has 144 places, 201 transitions, 2080 flow. Second operand 7 states and 180 transitions. [2024-06-20 16:08:49,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 240 transitions, 3042 flow [2024-06-20 16:08:49,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 240 transitions, 2904 flow, removed 56 selfloop flow, removed 2 redundant places. [2024-06-20 16:08:49,507 INFO L231 Difference]: Finished difference. Result has 150 places, 211 transitions, 2309 flow [2024-06-20 16:08:49,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1942, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2309, PETRI_PLACES=150, PETRI_TRANSITIONS=211} [2024-06-20 16:08:49,507 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 95 predicate places. [2024-06-20 16:08:49,507 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 211 transitions, 2309 flow [2024-06-20 16:08:49,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:49,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:49,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:49,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:08:49,508 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:08:49,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:49,508 INFO L85 PathProgramCache]: Analyzing trace with hash -301633674, now seen corresponding path program 3 times [2024-06-20 16:08:49,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:49,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837231705] [2024-06-20 16:08:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:49,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:50,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:50,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837231705] [2024-06-20 16:08:50,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837231705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:50,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:50,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:50,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782497380] [2024-06-20 16:08:50,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:50,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:50,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:50,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:50,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:50,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:08:50,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 211 transitions, 2309 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:50,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:50,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:08:50,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:53,204 INFO L124 PetriNetUnfolderBase]: 12186/16839 cut-off events. [2024-06-20 16:08:53,204 INFO L125 PetriNetUnfolderBase]: For 653711/653721 co-relation queries the response was YES. [2024-06-20 16:08:53,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128650 conditions, 16839 events. 12186/16839 cut-off events. For 653711/653721 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 91502 event pairs, 4959 based on Foata normal form. 11/16848 useless extension candidates. Maximal degree in co-relation 128585. Up to 16440 conditions per place. [2024-06-20 16:08:53,376 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 176 selfloop transitions, 57 changer transitions 0/239 dead transitions. [2024-06-20 16:08:53,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 239 transitions, 3039 flow [2024-06-20 16:08:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:53,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:53,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 16:08:53,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-20 16:08:53,378 INFO L175 Difference]: Start difference. First operand has 150 places, 211 transitions, 2309 flow. Second operand 7 states and 168 transitions. [2024-06-20 16:08:53,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 239 transitions, 3039 flow [2024-06-20 16:08:54,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 239 transitions, 2861 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-20 16:08:54,116 INFO L231 Difference]: Finished difference. Result has 154 places, 216 transitions, 2355 flow [2024-06-20 16:08:54,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2131, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2355, PETRI_PLACES=154, PETRI_TRANSITIONS=216} [2024-06-20 16:08:54,117 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 99 predicate places. [2024-06-20 16:08:54,117 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 216 transitions, 2355 flow [2024-06-20 16:08:54,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:54,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:54,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:54,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:08:54,117 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:08:54,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:54,118 INFO L85 PathProgramCache]: Analyzing trace with hash -893908068, now seen corresponding path program 1 times [2024-06-20 16:08:54,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:54,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327346344] [2024-06-20 16:08:54,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:54,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:55,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:55,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327346344] [2024-06-20 16:08:55,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327346344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:55,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:55,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:55,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430724803] [2024-06-20 16:08:55,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:55,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:55,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:55,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:55,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:55,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-20 16:08:55,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 216 transitions, 2355 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:55,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:55,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-20 16:08:55,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:57,526 INFO L124 PetriNetUnfolderBase]: 10262/14818 cut-off events. [2024-06-20 16:08:57,526 INFO L125 PetriNetUnfolderBase]: For 609407/609656 co-relation queries the response was YES. [2024-06-20 16:08:57,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113384 conditions, 14818 events. 10262/14818 cut-off events. For 609407/609656 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 86295 event pairs, 3920 based on Foata normal form. 3/14649 useless extension candidates. Maximal degree in co-relation 113317. Up to 13813 conditions per place. [2024-06-20 16:08:57,700 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 212 selfloop transitions, 18 changer transitions 0/248 dead transitions. [2024-06-20 16:08:57,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 248 transitions, 2990 flow [2024-06-20 16:08:57,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:57,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:57,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 16:08:57,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-20 16:08:57,701 INFO L175 Difference]: Start difference. First operand has 154 places, 216 transitions, 2355 flow. Second operand 7 states and 176 transitions. [2024-06-20 16:08:57,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 248 transitions, 2990 flow [2024-06-20 16:08:58,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 248 transitions, 2836 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-20 16:08:58,358 INFO L231 Difference]: Finished difference. Result has 157 places, 220 transitions, 2354 flow [2024-06-20 16:08:58,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2201, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2354, PETRI_PLACES=157, PETRI_TRANSITIONS=220} [2024-06-20 16:08:58,358 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 102 predicate places. [2024-06-20 16:08:58,359 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 220 transitions, 2354 flow [2024-06-20 16:08:58,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:58,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:58,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:58,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:08:58,359 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:08:58,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:58,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1241131252, now seen corresponding path program 1 times [2024-06-20 16:08:58,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:58,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913088887] [2024-06-20 16:08:58,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:58,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:58,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:59,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:59,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913088887] [2024-06-20 16:08:59,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913088887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:59,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:59,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:59,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509991175] [2024-06-20 16:08:59,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:59,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:59,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:59,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:59,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:59,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:08:59,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 220 transitions, 2354 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:59,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:59,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:08:59,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:01,634 INFO L124 PetriNetUnfolderBase]: 10880/15555 cut-off events. [2024-06-20 16:09:01,635 INFO L125 PetriNetUnfolderBase]: For 640975/640975 co-relation queries the response was YES. [2024-06-20 16:09:01,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119863 conditions, 15555 events. 10880/15555 cut-off events. For 640975/640975 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 89031 event pairs, 4198 based on Foata normal form. 6/15560 useless extension candidates. Maximal degree in co-relation 119795. Up to 14756 conditions per place. [2024-06-20 16:09:01,890 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 228 selfloop transitions, 29 changer transitions 0/264 dead transitions. [2024-06-20 16:09:01,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 264 transitions, 3371 flow [2024-06-20 16:09:01,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:01,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:01,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 16:09:01,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48626373626373626 [2024-06-20 16:09:01,892 INFO L175 Difference]: Start difference. First operand has 157 places, 220 transitions, 2354 flow. Second operand 7 states and 177 transitions. [2024-06-20 16:09:01,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 264 transitions, 3371 flow [2024-06-20 16:09:02,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 264 transitions, 3246 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-20 16:09:02,403 INFO L231 Difference]: Finished difference. Result has 161 places, 234 transitions, 2574 flow [2024-06-20 16:09:02,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2574, PETRI_PLACES=161, PETRI_TRANSITIONS=234} [2024-06-20 16:09:02,403 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 106 predicate places. [2024-06-20 16:09:02,403 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 234 transitions, 2574 flow [2024-06-20 16:09:02,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:02,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:02,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:02,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:09:02,404 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:09:02,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:02,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1418499922, now seen corresponding path program 2 times [2024-06-20 16:09:02,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:02,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27535364] [2024-06-20 16:09:02,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:02,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:03,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:03,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27535364] [2024-06-20 16:09:03,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27535364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:03,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:03,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:03,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450574472] [2024-06-20 16:09:03,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:03,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:03,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:03,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:03,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:03,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:09:03,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 234 transitions, 2574 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:03,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:03,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:09:03,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:06,068 INFO L124 PetriNetUnfolderBase]: 10999/15724 cut-off events. [2024-06-20 16:09:06,069 INFO L125 PetriNetUnfolderBase]: For 705378/705383 co-relation queries the response was YES. [2024-06-20 16:09:06,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126624 conditions, 15724 events. 10999/15724 cut-off events. For 705378/705383 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 90173 event pairs, 4204 based on Foata normal form. 10/15732 useless extension candidates. Maximal degree in co-relation 126553. Up to 14757 conditions per place. [2024-06-20 16:09:06,258 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 215 selfloop transitions, 56 changer transitions 0/278 dead transitions. [2024-06-20 16:09:06,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 278 transitions, 3763 flow [2024-06-20 16:09:06,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:06,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:06,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 16:09:06,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49175824175824173 [2024-06-20 16:09:06,260 INFO L175 Difference]: Start difference. First operand has 161 places, 234 transitions, 2574 flow. Second operand 7 states and 179 transitions. [2024-06-20 16:09:06,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 278 transitions, 3763 flow [2024-06-20 16:09:06,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 278 transitions, 3619 flow, removed 67 selfloop flow, removed 2 redundant places. [2024-06-20 16:09:06,903 INFO L231 Difference]: Finished difference. Result has 167 places, 249 transitions, 2904 flow [2024-06-20 16:09:06,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2430, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2904, PETRI_PLACES=167, PETRI_TRANSITIONS=249} [2024-06-20 16:09:06,903 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 112 predicate places. [2024-06-20 16:09:06,904 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 249 transitions, 2904 flow [2024-06-20 16:09:06,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:06,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:06,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:06,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:09:06,904 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:09:06,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:06,904 INFO L85 PathProgramCache]: Analyzing trace with hash -301864872, now seen corresponding path program 3 times [2024-06-20 16:09:06,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:06,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819312106] [2024-06-20 16:09:06,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:06,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:07,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:07,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:07,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819312106] [2024-06-20 16:09:07,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819312106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:07,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:07,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:07,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237970540] [2024-06-20 16:09:07,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:07,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:07,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:07,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:07,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:07,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:09:07,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 249 transitions, 2904 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:07,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:07,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:09:07,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:10,512 INFO L124 PetriNetUnfolderBase]: 10983/15702 cut-off events. [2024-06-20 16:09:10,512 INFO L125 PetriNetUnfolderBase]: For 753535/753540 co-relation queries the response was YES. [2024-06-20 16:09:10,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130434 conditions, 15702 events. 10983/15702 cut-off events. For 753535/753540 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 90074 event pairs, 4214 based on Foata normal form. 10/15710 useless extension candidates. Maximal degree in co-relation 130360. Up to 14747 conditions per place. [2024-06-20 16:09:10,691 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 219 selfloop transitions, 51 changer transitions 0/277 dead transitions. [2024-06-20 16:09:10,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 277 transitions, 3725 flow [2024-06-20 16:09:10,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:10,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:10,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 16:09:10,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.489010989010989 [2024-06-20 16:09:10,692 INFO L175 Difference]: Start difference. First operand has 167 places, 249 transitions, 2904 flow. Second operand 7 states and 178 transitions. [2024-06-20 16:09:10,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 277 transitions, 3725 flow [2024-06-20 16:09:11,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 277 transitions, 3504 flow, removed 103 selfloop flow, removed 2 redundant places. [2024-06-20 16:09:11,574 INFO L231 Difference]: Finished difference. Result has 172 places, 249 transitions, 2796 flow [2024-06-20 16:09:11,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2683, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2796, PETRI_PLACES=172, PETRI_TRANSITIONS=249} [2024-06-20 16:09:11,574 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 117 predicate places. [2024-06-20 16:09:11,574 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 249 transitions, 2796 flow [2024-06-20 16:09:11,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:11,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:11,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:11,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:09:11,575 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:09:11,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:11,575 INFO L85 PathProgramCache]: Analyzing trace with hash -301618794, now seen corresponding path program 1 times [2024-06-20 16:09:11,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:11,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607894203] [2024-06-20 16:09:11,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:11,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:12,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:12,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607894203] [2024-06-20 16:09:12,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607894203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:12,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:12,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:12,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308901455] [2024-06-20 16:09:12,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:12,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:12,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:12,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:12,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:13,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:09:13,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 249 transitions, 2796 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:13,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:13,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:09:13,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand