./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix030_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/mix030_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix030_power.opt_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix030_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-bcb38a6-m [2024-06-04 15:02:13,372 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 15:02:13,433 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 15:02:13,436 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 15:02:13,437 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 15:02:13,484 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 15:02:13,484 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 15:02:13,485 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 15:02:13,485 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 15:02:13,485 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 15:02:13,485 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 15:02:13,486 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 15:02:13,486 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 15:02:13,486 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 15:02:13,486 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 15:02:13,487 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 15:02:13,487 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 15:02:13,487 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 15:02:13,487 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 15:02:13,488 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 15:02:13,488 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 15:02:13,488 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 15:02:13,488 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 15:02:13,489 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 15:02:13,489 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 15:02:13,489 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 15:02:13,489 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 15:02:13,489 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 15:02:13,490 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 15:02:13,490 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 15:02:13,490 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 15:02:13,490 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 15:02:13,490 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:02:13,491 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 15:02:13,491 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 15:02:13,491 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 15:02:13,491 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 15:02:13,492 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 15:02:13,492 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 15:02:13,492 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 15:02:13,492 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 15:02:13,500 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 15:02:13,500 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 15:02:13,500 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 15:02:13,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 15:02:13,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 15:02:13,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 15:02:13,723 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 15:02:13,724 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 15:02:13,725 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix030_power.opt_pso.opt_rmo.opt.i [2024-06-04 15:02:14,808 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 15:02:14,980 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 15:02:14,981 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix030_power.opt_pso.opt_rmo.opt.i [2024-06-04 15:02:14,999 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/309b018a3/952212f82ba74e8ca544c5b8790faca1/FLAG37fc25043 [2024-06-04 15:02:15,011 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/309b018a3/952212f82ba74e8ca544c5b8790faca1 [2024-06-04 15:02:15,013 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 15:02:15,013 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 15:02:15,014 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix030_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-04 15:02:15,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 15:02:15,200 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 15:02:15,202 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 15:02:15,202 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 15:02:15,206 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 15:02:15,206 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:02:15" (1/2) ... [2024-06-04 15:02:15,207 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69f0e224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:02:15, skipping insertion in model container [2024-06-04 15:02:15,207 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:02:15" (1/2) ... [2024-06-04 15:02:15,209 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5f073143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:02:15, skipping insertion in model container [2024-06-04 15:02:15,209 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:02:15" (2/2) ... [2024-06-04 15:02:15,209 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69f0e224 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:02:15, skipping insertion in model container [2024-06-04 15:02:15,210 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:02:15" (2/2) ... [2024-06-04 15:02:15,210 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 15:02:15,312 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 15:02:15,314 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ((((((((((((((((((((! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-04 15:02:15,314 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] ((((((((((((((((((((! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_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 || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-04 15:02:15,314 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-04 15:02:15,314 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ((((((((((((((((((((! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_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 || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-04 15:02:15,314 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 15:02:15,315 INFO L106 edCorrectnessWitness]: ghost_update [L845-L845] multithreaded = 1; [2024-06-04 15:02:15,352 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 15:02:15,612 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:02:15,619 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 15:02:15,747 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:02:15,779 INFO L206 MainTranslator]: Completed translation [2024-06-04 15:02:15,779 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:02:15 WrapperNode [2024-06-04 15:02:15,779 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 15:02:15,780 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 15:02:15,781 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 15:02:15,781 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 15:02:15,787 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 04.06 03:02:15" (1/1) ... [2024-06-04 15:02:15,799 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 04.06 03:02:15" (1/1) ... [2024-06-04 15:02:15,838 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 156 [2024-06-04 15:02:15,838 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 15:02:15,839 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 15:02:15,839 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 15:02:15,839 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 15:02:15,848 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:02:15" (1/1) ... [2024-06-04 15:02:15,848 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:02:15" (1/1) ... [2024-06-04 15:02:15,852 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:02:15" (1/1) ... [2024-06-04 15:02:15,865 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]. [2024-06-04 15:02:15,865 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:02:15" (1/1) ... [2024-06-04 15:02:15,865 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:02:15" (1/1) ... [2024-06-04 15:02:15,872 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:02:15" (1/1) ... [2024-06-04 15:02:15,874 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:02:15" (1/1) ... [2024-06-04 15:02:15,875 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:02:15" (1/1) ... [2024-06-04 15:02:15,876 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:02:15" (1/1) ... [2024-06-04 15:02:15,879 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 15:02:15,880 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 15:02:15,880 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 15:02:15,880 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 15:02:15,881 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:02:15" (1/1) ... [2024-06-04 15:02:15,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:02:15,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 15:02:15,902 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) [2024-06-04 15:02:15,916 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 [2024-06-04 15:02:15,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 15:02:15,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 15:02:15,947 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 15:02:15,948 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 15:02:15,948 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 15:02:15,948 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 15:02:15,948 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 15:02:15,948 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 15:02:15,949 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-04 15:02:15,949 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-04 15:02:15,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 15:02:15,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 15:02:15,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 15:02:15,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 15:02:15,951 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 15:02:16,110 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 15:02:16,113 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 15:02:16,563 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 15:02:16,563 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 15:02:16,718 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 15:02:16,719 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 15:02:16,720 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:02:16 BoogieIcfgContainer [2024-06-04 15:02:16,720 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 15:02:16,722 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 15:02:16,722 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 15:02:16,724 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 15:02:16,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 03:02:15" (1/4) ... [2024-06-04 15:02:16,725 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d7d464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:02:16, skipping insertion in model container [2024-06-04 15:02:16,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:02:15" (2/4) ... [2024-06-04 15:02:16,726 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d7d464 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:02:16, skipping insertion in model container [2024-06-04 15:02:16,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:02:15" (3/4) ... [2024-06-04 15:02:16,726 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d7d464 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:02:16, skipping insertion in model container [2024-06-04 15:02:16,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:02:16" (4/4) ... [2024-06-04 15:02:16,727 INFO L112 eAbstractionObserver]: Analyzing ICFG mix030_power.opt_pso.opt_rmo.opt.i [2024-06-04 15:02:16,739 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 15:02:16,740 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-04 15:02:16,740 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 15:02:16,786 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 15:02:16,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-04 15:02:16,860 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-04 15:02:16,861 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:02:16,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 88 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 15:02:16,862 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-04 15:02:16,866 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-04 15:02:16,877 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 15:02:16,883 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;@661de543, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 15:02:16,883 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-04 15:02:16,888 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 15:02:16,888 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 15:02:16,888 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:02:16,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:16,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 15:02:16,889 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)] === [2024-06-04 15:02:16,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:16,893 INFO L85 PathProgramCache]: Analyzing trace with hash -772795219, now seen corresponding path program 1 times [2024-06-04 15:02:16,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:16,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777202889] [2024-06-04 15:02:16,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:16,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:17,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:17,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777202889] [2024-06-04 15:02:17,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777202889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:17,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:17,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 15:02:17,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637732499] [2024-06-04 15:02:17,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:17,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 15:02:17,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:17,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 15:02:17,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 15:02:18,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 15:02:18,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:18,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:18,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 15:02:18,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:19,534 INFO L124 PetriNetUnfolderBase]: 9899/14073 cut-off events. [2024-06-04 15:02:19,534 INFO L125 PetriNetUnfolderBase]: For 212/212 co-relation queries the response was YES. [2024-06-04 15:02:19,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27969 conditions, 14073 events. 9899/14073 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 79678 event pairs, 7548 based on Foata normal form. 1/13649 useless extension candidates. Maximal degree in co-relation 27953. Up to 13445 conditions per place. [2024-06-04 15:02:19,616 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 45 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-04 15:02:19,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 235 flow [2024-06-04 15:02:19,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 15:02:19,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 15:02:19,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-04 15:02:19,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5849056603773585 [2024-06-04 15:02:19,628 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 93 transitions. [2024-06-04 15:02:19,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 235 flow [2024-06-04 15:02:19,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 228 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 15:02:19,636 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-04 15:02:19,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-04 15:02:19,640 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-04 15:02:19,640 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-04 15:02:19,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:19,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:19,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:19,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 15:02:19,641 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)] === [2024-06-04 15:02:19,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:19,642 INFO L85 PathProgramCache]: Analyzing trace with hash 373169868, now seen corresponding path program 1 times [2024-06-04 15:02:19,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:19,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364612000] [2024-06-04 15:02:19,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:19,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:20,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:20,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364612000] [2024-06-04 15:02:20,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364612000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:20,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:20,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 15:02:20,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622764546] [2024-06-04 15:02:20,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:20,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 15:02:20,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:20,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 15:02:20,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 15:02:20,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-04 15:02:20,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:20,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:20,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-04 15:02:20,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:22,055 INFO L124 PetriNetUnfolderBase]: 11581/15991 cut-off events. [2024-06-04 15:02:22,055 INFO L125 PetriNetUnfolderBase]: For 2904/2904 co-relation queries the response was YES. [2024-06-04 15:02:22,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36101 conditions, 15991 events. 11581/15991 cut-off events. For 2904/2904 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 86933 event pairs, 7976 based on Foata normal form. 4/15993 useless extension candidates. Maximal degree in co-relation 36086. Up to 15642 conditions per place. [2024-06-04 15:02:22,125 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 56 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-04 15:02:22,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 329 flow [2024-06-04 15:02:22,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 15:02:22,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 15:02:22,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-06-04 15:02:22,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5518867924528302 [2024-06-04 15:02:22,127 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 117 transitions. [2024-06-04 15:02:22,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 329 flow [2024-06-04 15:02:22,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 15:02:22,129 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-04 15:02:22,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-04 15:02:22,130 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-04 15:02:22,130 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-04 15:02:22,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:22,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:22,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:22,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 15:02:22,131 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)] === [2024-06-04 15:02:22,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:22,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1316634884, now seen corresponding path program 1 times [2024-06-04 15:02:22,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:22,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656529656] [2024-06-04 15:02:22,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:22,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:22,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:22,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656529656] [2024-06-04 15:02:22,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656529656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:22,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:22,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 15:02:22,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408766650] [2024-06-04 15:02:22,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:22,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 15:02:22,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:22,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 15:02:22,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 15:02:22,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-04 15:02:22,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:22,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:22,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-04 15:02:22,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:24,401 INFO L124 PetriNetUnfolderBase]: 11599/16026 cut-off events. [2024-06-04 15:02:24,401 INFO L125 PetriNetUnfolderBase]: For 8436/8436 co-relation queries the response was YES. [2024-06-04 15:02:24,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40149 conditions, 16026 events. 11599/16026 cut-off events. For 8436/8436 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 87312 event pairs, 6384 based on Foata normal form. 7/16030 useless extension candidates. Maximal degree in co-relation 40132. Up to 15563 conditions per place. [2024-06-04 15:02:24,460 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 74 selfloop transitions, 21 changer transitions 0/101 dead transitions. [2024-06-04 15:02:24,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 545 flow [2024-06-04 15:02:24,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:02:24,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:02:24,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-04 15:02:24,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773584905660377 [2024-06-04 15:02:24,462 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 5 states and 153 transitions. [2024-06-04 15:02:24,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 545 flow [2024-06-04 15:02:24,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 526 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-04 15:02:24,466 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 312 flow [2024-06-04 15:02:24,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-04 15:02:24,466 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-04 15:02:24,467 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 312 flow [2024-06-04 15:02:24,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:24,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:24,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:24,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 15:02:24,467 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)] === [2024-06-04 15:02:24,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:24,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1729264891, now seen corresponding path program 1 times [2024-06-04 15:02:24,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:24,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607593179] [2024-06-04 15:02:24,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:24,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:25,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:25,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607593179] [2024-06-04 15:02:25,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607593179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:25,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:25,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:02:25,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039341333] [2024-06-04 15:02:25,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:25,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:02:25,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:25,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:02:25,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:02:25,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-04 15:02:25,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 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) [2024-06-04 15:02:25,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:25,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-04 15:02:25,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:26,801 INFO L124 PetriNetUnfolderBase]: 11628/16065 cut-off events. [2024-06-04 15:02:26,802 INFO L125 PetriNetUnfolderBase]: For 20158/20163 co-relation queries the response was YES. [2024-06-04 15:02:26,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46687 conditions, 16065 events. 11628/16065 cut-off events. For 20158/20163 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 87595 event pairs, 5283 based on Foata normal form. 18/16080 useless extension candidates. Maximal degree in co-relation 46667. Up to 15528 conditions per place. [2024-06-04 15:02:26,915 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 81 selfloop transitions, 25 changer transitions 0/112 dead transitions. [2024-06-04 15:02:26,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 112 transitions, 690 flow [2024-06-04 15:02:26,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:02:26,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:02:26,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-04 15:02:26,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5534591194968553 [2024-06-04 15:02:26,917 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 312 flow. Second operand 6 states and 176 transitions. [2024-06-04 15:02:26,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 112 transitions, 690 flow [2024-06-04 15:02:26,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 112 transitions, 678 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-04 15:02:26,927 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 389 flow [2024-06-04 15:02:26,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=389, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-04 15:02:26,929 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2024-06-04 15:02:26,929 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 389 flow [2024-06-04 15:02:26,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 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) [2024-06-04 15:02:26,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:26,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:26,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 15:02:26,930 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)] === [2024-06-04 15:02:26,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:26,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1185433888, now seen corresponding path program 1 times [2024-06-04 15:02:26,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:26,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928506102] [2024-06-04 15:02:26,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:26,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:27,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:27,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928506102] [2024-06-04 15:02:27,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928506102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:27,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:27,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:02:27,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421785876] [2024-06-04 15:02:27,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:27,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:02:27,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:27,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:02:27,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:02:27,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-04 15:02:27,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 389 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:27,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:27,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-04 15:02:27,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:29,395 INFO L124 PetriNetUnfolderBase]: 9927/14066 cut-off events. [2024-06-04 15:02:29,395 INFO L125 PetriNetUnfolderBase]: For 25660/25660 co-relation queries the response was YES. [2024-06-04 15:02:29,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44190 conditions, 14066 events. 9927/14066 cut-off events. For 25660/25660 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 79521 event pairs, 5267 based on Foata normal form. 3/13873 useless extension candidates. Maximal degree in co-relation 44167. Up to 13472 conditions per place. [2024-06-04 15:02:29,460 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 68 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-06-04 15:02:29,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 85 transitions, 589 flow [2024-06-04 15:02:29,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:02:29,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:02:29,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-04 15:02:29,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641509433962264 [2024-06-04 15:02:29,462 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 389 flow. Second operand 5 states and 123 transitions. [2024-06-04 15:02:29,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 85 transitions, 589 flow [2024-06-04 15:02:29,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 85 transitions, 520 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 15:02:29,469 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 351 flow [2024-06-04 15:02:29,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=351, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2024-06-04 15:02:29,470 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-04 15:02:29,470 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 351 flow [2024-06-04 15:02:29,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:29,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:29,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:29,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 15:02:29,471 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)] === [2024-06-04 15:02:29,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:29,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1906484884, now seen corresponding path program 1 times [2024-06-04 15:02:29,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:29,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21310601] [2024-06-04 15:02:29,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:29,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:30,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:30,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21310601] [2024-06-04 15:02:30,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21310601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:30,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:30,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:02:30,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282822025] [2024-06-04 15:02:30,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:30,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:02:30,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:30,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:02:30,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:02:30,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-04 15:02:30,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 351 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:30,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:30,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-04 15:02:30,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:32,066 INFO L124 PetriNetUnfolderBase]: 9909/14106 cut-off events. [2024-06-04 15:02:32,066 INFO L125 PetriNetUnfolderBase]: For 29840/29840 co-relation queries the response was YES. [2024-06-04 15:02:32,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44896 conditions, 14106 events. 9909/14106 cut-off events. For 29840/29840 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 80016 event pairs, 5029 based on Foata normal form. 6/13902 useless extension candidates. Maximal degree in co-relation 44871. Up to 13418 conditions per place. [2024-06-04 15:02:32,160 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 76 selfloop transitions, 14 changer transitions 0/97 dead transitions. [2024-06-04 15:02:32,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 97 transitions, 623 flow [2024-06-04 15:02:32,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:02:32,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:02:32,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 15:02:32,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-04 15:02:32,164 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 351 flow. Second operand 6 states and 147 transitions. [2024-06-04 15:02:32,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 97 transitions, 623 flow [2024-06-04 15:02:32,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 97 transitions, 594 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 15:02:32,175 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 397 flow [2024-06-04 15:02:32,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=397, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-04 15:02:32,176 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-04 15:02:32,176 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 397 flow [2024-06-04 15:02:32,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:32,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:32,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:32,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 15:02:32,177 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)] === [2024-06-04 15:02:32,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:32,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1779487219, now seen corresponding path program 1 times [2024-06-04 15:02:32,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:32,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372641019] [2024-06-04 15:02:32,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:32,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:33,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:33,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372641019] [2024-06-04 15:02:33,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372641019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:33,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:33,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:02:33,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809024083] [2024-06-04 15:02:33,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:33,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:02:33,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:33,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:02:33,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:02:33,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-04 15:02:33,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 397 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:33,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:33,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-04 15:02:33,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:34,945 INFO L124 PetriNetUnfolderBase]: 11614/16054 cut-off events. [2024-06-04 15:02:34,946 INFO L125 PetriNetUnfolderBase]: For 47428/47438 co-relation queries the response was YES. [2024-06-04 15:02:34,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55340 conditions, 16054 events. 11614/16054 cut-off events. For 47428/47438 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 87336 event pairs, 6127 based on Foata normal form. 14/16065 useless extension candidates. Maximal degree in co-relation 55315. Up to 15582 conditions per place. [2024-06-04 15:02:35,054 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 75 selfloop transitions, 25 changer transitions 0/106 dead transitions. [2024-06-04 15:02:35,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 106 transitions, 740 flow [2024-06-04 15:02:35,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:02:35,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:02:35,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-04 15:02:35,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748427672955975 [2024-06-04 15:02:35,056 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 397 flow. Second operand 6 states and 151 transitions. [2024-06-04 15:02:35,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 106 transitions, 740 flow [2024-06-04 15:02:35,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 106 transitions, 697 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 15:02:35,072 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 450 flow [2024-06-04 15:02:35,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=450, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-04 15:02:35,073 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 17 predicate places. [2024-06-04 15:02:35,074 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 450 flow [2024-06-04 15:02:35,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:35,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:35,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:35,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 15:02:35,074 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)] === [2024-06-04 15:02:35,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:35,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1035653567, now seen corresponding path program 2 times [2024-06-04 15:02:35,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:35,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986423598] [2024-06-04 15:02:35,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:35,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:35,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:35,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986423598] [2024-06-04 15:02:35,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986423598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:35,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:35,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:02:35,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402503723] [2024-06-04 15:02:35,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:35,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:02:35,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:35,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:02:35,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:02:36,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-04 15:02:36,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 450 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:36,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:36,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-04 15:02:36,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:38,001 INFO L124 PetriNetUnfolderBase]: 11590/16006 cut-off events. [2024-06-04 15:02:38,001 INFO L125 PetriNetUnfolderBase]: For 55496/55500 co-relation queries the response was YES. [2024-06-04 15:02:38,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56492 conditions, 16006 events. 11590/16006 cut-off events. For 55496/55500 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 86968 event pairs, 6147 based on Foata normal form. 4/16003 useless extension candidates. Maximal degree in co-relation 56466. Up to 15552 conditions per place. [2024-06-04 15:02:38,093 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 68 selfloop transitions, 26 changer transitions 0/100 dead transitions. [2024-06-04 15:02:38,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 100 transitions, 700 flow [2024-06-04 15:02:38,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:02:38,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:02:38,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 15:02:38,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591194968553459 [2024-06-04 15:02:38,095 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 450 flow. Second operand 6 states and 146 transitions. [2024-06-04 15:02:38,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 100 transitions, 700 flow [2024-06-04 15:02:38,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 100 transitions, 657 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-04 15:02:38,115 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 470 flow [2024-06-04 15:02:38,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=470, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2024-06-04 15:02:38,118 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2024-06-04 15:02:38,118 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 470 flow [2024-06-04 15:02:38,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:38,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:38,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:38,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 15:02:38,119 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:02:38,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:38,120 INFO L85 PathProgramCache]: Analyzing trace with hash 554979757, now seen corresponding path program 1 times [2024-06-04 15:02:38,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:38,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365109048] [2024-06-04 15:02:38,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:38,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:38,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:38,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365109048] [2024-06-04 15:02:38,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365109048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:38,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:38,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:02:38,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311708363] [2024-06-04 15:02:38,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:38,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:02:38,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:38,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:02:38,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:02:39,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-04 15:02:39,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 470 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:39,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:39,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-04 15:02:39,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:40,747 INFO L124 PetriNetUnfolderBase]: 11956/16497 cut-off events. [2024-06-04 15:02:40,747 INFO L125 PetriNetUnfolderBase]: For 67932/67934 co-relation queries the response was YES. [2024-06-04 15:02:40,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60083 conditions, 16497 events. 11956/16497 cut-off events. For 67932/67934 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 89303 event pairs, 5440 based on Foata normal form. 14/16506 useless extension candidates. Maximal degree in co-relation 60056. Up to 15618 conditions per place. [2024-06-04 15:02:40,921 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 105 selfloop transitions, 55 changer transitions 0/166 dead transitions. [2024-06-04 15:02:40,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 166 transitions, 1350 flow [2024-06-04 15:02:40,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:02:40,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:02:40,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-04 15:02:40,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49292452830188677 [2024-06-04 15:02:40,937 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 470 flow. Second operand 8 states and 209 transitions. [2024-06-04 15:02:40,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 166 transitions, 1350 flow [2024-06-04 15:02:41,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 166 transitions, 1187 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 15:02:41,009 INFO L231 Difference]: Finished difference. Result has 81 places, 109 transitions, 791 flow [2024-06-04 15:02:41,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=791, PETRI_PLACES=81, PETRI_TRANSITIONS=109} [2024-06-04 15:02:41,011 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-04 15:02:41,011 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 109 transitions, 791 flow [2024-06-04 15:02:41,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:41,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:41,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:41,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 15:02:41,015 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:02:41,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:41,015 INFO L85 PathProgramCache]: Analyzing trace with hash -75440577, now seen corresponding path program 2 times [2024-06-04 15:02:41,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:41,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94152802] [2024-06-04 15:02:41,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:41,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:42,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:42,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94152802] [2024-06-04 15:02:42,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94152802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:42,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:42,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:02:42,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239160078] [2024-06-04 15:02:42,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:42,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:02:42,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:42,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:02:42,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:02:42,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-04 15:02:42,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 109 transitions, 791 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:42,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:42,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-04 15:02:42,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:44,052 INFO L124 PetriNetUnfolderBase]: 12116/16729 cut-off events. [2024-06-04 15:02:44,052 INFO L125 PetriNetUnfolderBase]: For 89282/89290 co-relation queries the response was YES. [2024-06-04 15:02:44,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66619 conditions, 16729 events. 12116/16729 cut-off events. For 89282/89290 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 90546 event pairs, 5461 based on Foata normal form. 26/16750 useless extension candidates. Maximal degree in co-relation 66588. Up to 15730 conditions per place. [2024-06-04 15:02:44,183 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 91 selfloop transitions, 65 changer transitions 0/162 dead transitions. [2024-06-04 15:02:44,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 162 transitions, 1401 flow [2024-06-04 15:02:44,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:02:44,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:02:44,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-04 15:02:44,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48247978436657685 [2024-06-04 15:02:44,185 INFO L175 Difference]: Start difference. First operand has 81 places, 109 transitions, 791 flow. Second operand 7 states and 179 transitions. [2024-06-04 15:02:44,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 162 transitions, 1401 flow [2024-06-04 15:02:44,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 162 transitions, 1360 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-04 15:02:44,244 INFO L231 Difference]: Finished difference. Result has 86 places, 118 transitions, 1000 flow [2024-06-04 15:02:44,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1000, PETRI_PLACES=86, PETRI_TRANSITIONS=118} [2024-06-04 15:02:44,245 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-06-04 15:02:44,245 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 118 transitions, 1000 flow [2024-06-04 15:02:44,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:44,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:44,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:44,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 15:02:44,246 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)] === [2024-06-04 15:02:44,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:44,246 INFO L85 PathProgramCache]: Analyzing trace with hash 2041384127, now seen corresponding path program 3 times [2024-06-04 15:02:44,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:44,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294042124] [2024-06-04 15:02:44,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:44,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:45,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:45,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294042124] [2024-06-04 15:02:45,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294042124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:45,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:45,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:02:45,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259676915] [2024-06-04 15:02:45,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:45,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:02:45,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:45,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:02:45,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:02:45,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-04 15:02:45,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 118 transitions, 1000 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:45,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:45,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-04 15:02:45,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:47,231 INFO L124 PetriNetUnfolderBase]: 12196/16832 cut-off events. [2024-06-04 15:02:47,231 INFO L125 PetriNetUnfolderBase]: For 105541/105549 co-relation queries the response was YES. [2024-06-04 15:02:47,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70048 conditions, 16832 events. 12196/16832 cut-off events. For 105541/105549 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 90939 event pairs, 5476 based on Foata normal form. 13/16830 useless extension candidates. Maximal degree in co-relation 70015. Up to 15772 conditions per place. [2024-06-04 15:02:47,368 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 92 selfloop transitions, 79 changer transitions 0/177 dead transitions. [2024-06-04 15:02:47,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 177 transitions, 1800 flow [2024-06-04 15:02:47,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:02:47,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:02:47,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-04 15:02:47,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48787061994609165 [2024-06-04 15:02:47,371 INFO L175 Difference]: Start difference. First operand has 86 places, 118 transitions, 1000 flow. Second operand 7 states and 181 transitions. [2024-06-04 15:02:47,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 177 transitions, 1800 flow [2024-06-04 15:02:47,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 177 transitions, 1631 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-04 15:02:47,464 INFO L231 Difference]: Finished difference. Result has 89 places, 132 transitions, 1209 flow [2024-06-04 15:02:47,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1209, PETRI_PLACES=89, PETRI_TRANSITIONS=132} [2024-06-04 15:02:47,465 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 33 predicate places. [2024-06-04 15:02:47,465 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 132 transitions, 1209 flow [2024-06-04 15:02:47,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:47,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:47,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:47,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 15:02:47,466 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)] === [2024-06-04 15:02:47,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:47,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1819082507, now seen corresponding path program 4 times [2024-06-04 15:02:47,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:47,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904710382] [2024-06-04 15:02:47,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:47,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:48,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:48,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904710382] [2024-06-04 15:02:48,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904710382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:48,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:48,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:02:48,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815802207] [2024-06-04 15:02:48,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:48,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:02:48,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:48,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:02:48,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:02:48,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-04 15:02:48,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 132 transitions, 1209 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:48,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:48,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-04 15:02:48,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:50,335 INFO L124 PetriNetUnfolderBase]: 12164/16782 cut-off events. [2024-06-04 15:02:50,335 INFO L125 PetriNetUnfolderBase]: For 106045/106059 co-relation queries the response was YES. [2024-06-04 15:02:50,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69505 conditions, 16782 events. 12164/16782 cut-off events. For 106045/106059 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 90675 event pairs, 5452 based on Foata normal form. 19/16786 useless extension candidates. Maximal degree in co-relation 69471. Up to 15755 conditions per place. [2024-06-04 15:02:50,507 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 87 selfloop transitions, 81 changer transitions 0/174 dead transitions. [2024-06-04 15:02:50,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 174 transitions, 1747 flow [2024-06-04 15:02:50,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:02:50,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:02:50,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-04 15:02:50,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-04 15:02:50,514 INFO L175 Difference]: Start difference. First operand has 89 places, 132 transitions, 1209 flow. Second operand 7 states and 177 transitions. [2024-06-04 15:02:50,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 174 transitions, 1747 flow [2024-06-04 15:02:50,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 174 transitions, 1616 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-04 15:02:50,619 INFO L231 Difference]: Finished difference. Result has 94 places, 132 transitions, 1254 flow [2024-06-04 15:02:50,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1254, PETRI_PLACES=94, PETRI_TRANSITIONS=132} [2024-06-04 15:02:50,620 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-04 15:02:50,620 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 132 transitions, 1254 flow [2024-06-04 15:02:50,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:50,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:50,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:50,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 15:02:50,621 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:02:50,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:50,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1819091435, now seen corresponding path program 1 times [2024-06-04 15:02:50,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:50,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048330120] [2024-06-04 15:02:50,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:50,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:51,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:51,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048330120] [2024-06-04 15:02:51,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048330120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:51,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:51,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:02:51,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774724863] [2024-06-04 15:02:51,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:51,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:02:51,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:51,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:02:51,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:02:52,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-04 15:02:52,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 132 transitions, 1254 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:52,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:52,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-04 15:02:52,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:54,006 INFO L124 PetriNetUnfolderBase]: 10457/14656 cut-off events. [2024-06-04 15:02:54,006 INFO L125 PetriNetUnfolderBase]: For 99960/99962 co-relation queries the response was YES. [2024-06-04 15:02:54,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61815 conditions, 14656 events. 10457/14656 cut-off events. For 99960/99962 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 80846 event pairs, 4707 based on Foata normal form. 6/14510 useless extension candidates. Maximal degree in co-relation 61778. Up to 14127 conditions per place. [2024-06-04 15:02:54,142 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 144 selfloop transitions, 17 changer transitions 0/168 dead transitions. [2024-06-04 15:02:54,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 168 transitions, 1714 flow [2024-06-04 15:02:54,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:02:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:02:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 15:02:54,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4582210242587601 [2024-06-04 15:02:54,144 INFO L175 Difference]: Start difference. First operand has 94 places, 132 transitions, 1254 flow. Second operand 7 states and 170 transitions. [2024-06-04 15:02:54,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 168 transitions, 1714 flow [2024-06-04 15:02:54,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 168 transitions, 1507 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 15:02:54,217 INFO L231 Difference]: Finished difference. Result has 94 places, 135 transitions, 1133 flow [2024-06-04 15:02:54,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1047, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1133, PETRI_PLACES=94, PETRI_TRANSITIONS=135} [2024-06-04 15:02:54,218 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-04 15:02:54,218 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 135 transitions, 1133 flow [2024-06-04 15:02:54,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:54,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:54,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:54,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 15:02:54,219 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:02:54,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:54,219 INFO L85 PathProgramCache]: Analyzing trace with hash -249742789, now seen corresponding path program 1 times [2024-06-04 15:02:54,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:54,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529462758] [2024-06-04 15:02:54,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:54,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:55,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:55,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529462758] [2024-06-04 15:02:55,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529462758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:55,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:55,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:02:55,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994544699] [2024-06-04 15:02:55,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:55,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:02:55,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:55,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:02:55,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:02:55,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-04 15:02:55,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 135 transitions, 1133 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:55,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:55,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-04 15:02:55,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:56,710 INFO L124 PetriNetUnfolderBase]: 10450/15009 cut-off events. [2024-06-04 15:02:56,710 INFO L125 PetriNetUnfolderBase]: For 110940/110942 co-relation queries the response was YES. [2024-06-04 15:02:56,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63843 conditions, 15009 events. 10450/15009 cut-off events. For 110940/110942 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 85790 event pairs, 4920 based on Foata normal form. 2/14829 useless extension candidates. Maximal degree in co-relation 63806. Up to 14184 conditions per place. [2024-06-04 15:02:56,815 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 136 selfloop transitions, 10 changer transitions 0/153 dead transitions. [2024-06-04 15:02:56,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 153 transitions, 1507 flow [2024-06-04 15:02:56,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:02:56,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:02:56,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-04 15:02:56,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4490566037735849 [2024-06-04 15:02:56,817 INFO L175 Difference]: Start difference. First operand has 94 places, 135 transitions, 1133 flow. Second operand 5 states and 119 transitions. [2024-06-04 15:02:56,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 153 transitions, 1507 flow [2024-06-04 15:02:56,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 153 transitions, 1447 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 15:02:56,886 INFO L231 Difference]: Finished difference. Result has 94 places, 139 transitions, 1148 flow [2024-06-04 15:02:56,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1148, PETRI_PLACES=94, PETRI_TRANSITIONS=139} [2024-06-04 15:02:56,887 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-04 15:02:56,887 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 139 transitions, 1148 flow [2024-06-04 15:02:56,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:56,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:56,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:56,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 15:02:56,887 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)] === [2024-06-04 15:02:56,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:56,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1956310115, now seen corresponding path program 1 times [2024-06-04 15:02:56,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:56,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571140712] [2024-06-04 15:02:56,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:56,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:57,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:57,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:57,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571140712] [2024-06-04 15:02:57,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571140712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:57,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:57,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:02:57,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488898005] [2024-06-04 15:02:57,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:57,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:02:57,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:57,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:02:57,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:02:57,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-04 15:02:57,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 139 transitions, 1148 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:57,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:57,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-04 15:02:57,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:59,845 INFO L124 PetriNetUnfolderBase]: 12342/17176 cut-off events. [2024-06-04 15:02:59,846 INFO L125 PetriNetUnfolderBase]: For 155355/155373 co-relation queries the response was YES. [2024-06-04 15:02:59,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77697 conditions, 17176 events. 12342/17176 cut-off events. For 155355/155373 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 94008 event pairs, 5419 based on Foata normal form. 28/17199 useless extension candidates. Maximal degree in co-relation 77659. Up to 15898 conditions per place. [2024-06-04 15:03:00,210 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 106 selfloop transitions, 90 changer transitions 0/202 dead transitions. [2024-06-04 15:03:00,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 202 transitions, 2064 flow [2024-06-04 15:03:00,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:03:00,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:03:00,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-04 15:03:00,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-04 15:03:00,213 INFO L175 Difference]: Start difference. First operand has 94 places, 139 transitions, 1148 flow. Second operand 7 states and 182 transitions. [2024-06-04 15:03:00,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 202 transitions, 2064 flow [2024-06-04 15:03:00,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 202 transitions, 2019 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-04 15:03:00,291 INFO L231 Difference]: Finished difference. Result has 98 places, 155 transitions, 1524 flow [2024-06-04 15:03:00,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1103, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1524, PETRI_PLACES=98, PETRI_TRANSITIONS=155} [2024-06-04 15:03:00,292 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 42 predicate places. [2024-06-04 15:03:00,292 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 155 transitions, 1524 flow [2024-06-04 15:03:00,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:00,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:00,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:00,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 15:03:00,293 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)] === [2024-06-04 15:03:00,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:00,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1956304535, now seen corresponding path program 2 times [2024-06-04 15:03:00,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:00,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379862055] [2024-06-04 15:03:00,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:00,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:01,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:01,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379862055] [2024-06-04 15:03:01,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379862055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:01,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:01,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:03:01,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234673039] [2024-06-04 15:03:01,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:01,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:03:01,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:01,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:03:01,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:03:01,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-04 15:03:01,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 155 transitions, 1524 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:01,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:01,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-04 15:03:01,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:03,279 INFO L124 PetriNetUnfolderBase]: 12306/17154 cut-off events. [2024-06-04 15:03:03,280 INFO L125 PetriNetUnfolderBase]: For 173514/173540 co-relation queries the response was YES. [2024-06-04 15:03:03,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79420 conditions, 17154 events. 12306/17154 cut-off events. For 173514/173540 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 94072 event pairs, 5441 based on Foata normal form. 38/17187 useless extension candidates. Maximal degree in co-relation 79381. Up to 15868 conditions per place. [2024-06-04 15:03:03,467 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 102 selfloop transitions, 94 changer transitions 0/202 dead transitions. [2024-06-04 15:03:03,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 202 transitions, 2152 flow [2024-06-04 15:03:03,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:03:03,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:03:03,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-04 15:03:03,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-04 15:03:03,469 INFO L175 Difference]: Start difference. First operand has 98 places, 155 transitions, 1524 flow. Second operand 7 states and 183 transitions. [2024-06-04 15:03:03,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 202 transitions, 2152 flow [2024-06-04 15:03:03,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 202 transitions, 1964 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-04 15:03:03,658 INFO L231 Difference]: Finished difference. Result has 102 places, 155 transitions, 1539 flow [2024-06-04 15:03:03,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1336, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1539, PETRI_PLACES=102, PETRI_TRANSITIONS=155} [2024-06-04 15:03:03,660 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-06-04 15:03:03,661 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 155 transitions, 1539 flow [2024-06-04 15:03:03,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:03,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:03,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:03,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 15:03:03,661 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:03:03,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:03,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1161954777, now seen corresponding path program 3 times [2024-06-04 15:03:03,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:03,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404956350] [2024-06-04 15:03:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:03,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:04,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:04,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404956350] [2024-06-04 15:03:04,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404956350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:04,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:04,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:03:04,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965131967] [2024-06-04 15:03:04,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:04,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:03:04,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:04,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:03:04,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:03:04,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-04 15:03:04,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 155 transitions, 1539 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:04,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:04,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-04 15:03:04,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:06,826 INFO L124 PetriNetUnfolderBase]: 12274/17090 cut-off events. [2024-06-04 15:03:06,826 INFO L125 PetriNetUnfolderBase]: For 190514/190553 co-relation queries the response was YES. [2024-06-04 15:03:06,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80157 conditions, 17090 events. 12274/17090 cut-off events. For 190514/190553 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 93586 event pairs, 5437 based on Foata normal form. 43/17121 useless extension candidates. Maximal degree in co-relation 80117. Up to 15841 conditions per place. [2024-06-04 15:03:06,961 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 100 selfloop transitions, 87 changer transitions 0/193 dead transitions. [2024-06-04 15:03:06,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 193 transitions, 2045 flow [2024-06-04 15:03:06,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:03:06,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:03:06,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 15:03:06,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609164420485175 [2024-06-04 15:03:06,963 INFO L175 Difference]: Start difference. First operand has 102 places, 155 transitions, 1539 flow. Second operand 7 states and 171 transitions. [2024-06-04 15:03:06,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 193 transitions, 2045 flow [2024-06-04 15:03:07,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 193 transitions, 1720 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-04 15:03:07,132 INFO L231 Difference]: Finished difference. Result has 102 places, 155 transitions, 1403 flow [2024-06-04 15:03:07,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1403, PETRI_PLACES=102, PETRI_TRANSITIONS=155} [2024-06-04 15:03:07,133 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-06-04 15:03:07,133 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 155 transitions, 1403 flow [2024-06-04 15:03:07,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:07,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:07,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:07,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 15:03:07,134 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)] === [2024-06-04 15:03:07,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:07,134 INFO L85 PathProgramCache]: Analyzing trace with hash 847910141, now seen corresponding path program 1 times [2024-06-04 15:03:07,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:07,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245102898] [2024-06-04 15:03:07,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:07,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:08,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:08,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245102898] [2024-06-04 15:03:08,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245102898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:08,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:08,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:03:08,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743921525] [2024-06-04 15:03:08,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:08,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:03:08,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:08,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:03:08,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:03:08,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-04 15:03:08,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 155 transitions, 1403 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:08,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:08,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-04 15:03:08,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:09,834 INFO L124 PetriNetUnfolderBase]: 12277/17096 cut-off events. [2024-06-04 15:03:09,834 INFO L125 PetriNetUnfolderBase]: For 202054/202056 co-relation queries the response was YES. [2024-06-04 15:03:09,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81085 conditions, 17096 events. 12277/17096 cut-off events. For 202054/202056 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 93467 event pairs, 5872 based on Foata normal form. 3/17097 useless extension candidates. Maximal degree in co-relation 81045. Up to 16572 conditions per place. [2024-06-04 15:03:09,985 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 161 selfloop transitions, 22 changer transitions 0/189 dead transitions. [2024-06-04 15:03:09,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 189 transitions, 2013 flow [2024-06-04 15:03:09,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:03:09,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:03:09,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-04 15:03:09,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44025157232704404 [2024-06-04 15:03:09,987 INFO L175 Difference]: Start difference. First operand has 102 places, 155 transitions, 1403 flow. Second operand 6 states and 140 transitions. [2024-06-04 15:03:09,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 189 transitions, 2013 flow [2024-06-04 15:03:10,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 189 transitions, 1759 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 15:03:10,215 INFO L231 Difference]: Finished difference. Result has 103 places, 169 transitions, 1357 flow [2024-06-04 15:03:10,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1357, PETRI_PLACES=103, PETRI_TRANSITIONS=169} [2024-06-04 15:03:10,215 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 47 predicate places. [2024-06-04 15:03:10,216 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 169 transitions, 1357 flow [2024-06-04 15:03:10,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:10,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:10,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:10,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 15:03:10,216 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:03:10,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:10,217 INFO L85 PathProgramCache]: Analyzing trace with hash 397746274, now seen corresponding path program 1 times [2024-06-04 15:03:10,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:10,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907380701] [2024-06-04 15:03:10,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:10,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:11,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:11,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:11,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907380701] [2024-06-04 15:03:11,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907380701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:11,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:11,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:03:11,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436558662] [2024-06-04 15:03:11,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:11,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:03:11,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:11,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:03:11,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:03:11,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-04 15:03:11,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 169 transitions, 1357 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:11,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:11,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-04 15:03:11,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:13,278 INFO L124 PetriNetUnfolderBase]: 12731/17733 cut-off events. [2024-06-04 15:03:13,279 INFO L125 PetriNetUnfolderBase]: For 242614/242751 co-relation queries the response was YES. [2024-06-04 15:03:13,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88719 conditions, 17733 events. 12731/17733 cut-off events. For 242614/242751 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 97445 event pairs, 4813 based on Foata normal form. 22/17706 useless extension candidates. Maximal degree in co-relation 88676. Up to 16717 conditions per place. [2024-06-04 15:03:13,403 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 160 selfloop transitions, 46 changer transitions 0/215 dead transitions. [2024-06-04 15:03:13,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 215 transitions, 2081 flow [2024-06-04 15:03:13,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:03:13,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:03:13,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 15:03:13,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46630727762803237 [2024-06-04 15:03:13,405 INFO L175 Difference]: Start difference. First operand has 103 places, 169 transitions, 1357 flow. Second operand 7 states and 173 transitions. [2024-06-04 15:03:13,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 215 transitions, 2081 flow [2024-06-04 15:03:13,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 215 transitions, 2041 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-04 15:03:13,558 INFO L231 Difference]: Finished difference. Result has 109 places, 175 transitions, 1513 flow [2024-06-04 15:03:13,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1513, PETRI_PLACES=109, PETRI_TRANSITIONS=175} [2024-06-04 15:03:13,558 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 53 predicate places. [2024-06-04 15:03:13,558 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 175 transitions, 1513 flow [2024-06-04 15:03:13,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:13,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:13,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:13,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 15:03:13,559 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:03:13,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:13,560 INFO L85 PathProgramCache]: Analyzing trace with hash 397806724, now seen corresponding path program 2 times [2024-06-04 15:03:13,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:13,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141337518] [2024-06-04 15:03:13,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:13,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:14,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:14,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:14,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141337518] [2024-06-04 15:03:14,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141337518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:14,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:14,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:03:14,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335252431] [2024-06-04 15:03:14,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:14,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:03:14,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:14,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:03:14,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:03:14,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-04 15:03:14,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 175 transitions, 1513 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:14,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:14,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-04 15:03:14,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:16,666 INFO L124 PetriNetUnfolderBase]: 12716/17711 cut-off events. [2024-06-04 15:03:16,667 INFO L125 PetriNetUnfolderBase]: For 272321/272450 co-relation queries the response was YES. [2024-06-04 15:03:16,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91763 conditions, 17711 events. 12716/17711 cut-off events. For 272321/272450 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 97215 event pairs, 5625 based on Foata normal form. 14/17676 useless extension candidates. Maximal degree in co-relation 91717. Up to 16832 conditions per place. [2024-06-04 15:03:17,027 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 159 selfloop transitions, 45 changer transitions 0/213 dead transitions. [2024-06-04 15:03:17,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 213 transitions, 2051 flow [2024-06-04 15:03:17,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:03:17,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:03:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 15:03:17,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4582210242587601 [2024-06-04 15:03:17,030 INFO L175 Difference]: Start difference. First operand has 109 places, 175 transitions, 1513 flow. Second operand 7 states and 170 transitions. [2024-06-04 15:03:17,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 213 transitions, 2051 flow [2024-06-04 15:03:17,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 213 transitions, 1942 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-04 15:03:17,257 INFO L231 Difference]: Finished difference. Result has 113 places, 175 transitions, 1506 flow [2024-06-04 15:03:17,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1404, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1506, PETRI_PLACES=113, PETRI_TRANSITIONS=175} [2024-06-04 15:03:17,257 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-06-04 15:03:17,258 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 175 transitions, 1506 flow [2024-06-04 15:03:17,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:17,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:17,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:17,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 15:03:17,258 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:03:17,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:17,259 INFO L85 PathProgramCache]: Analyzing trace with hash 78480078, now seen corresponding path program 1 times [2024-06-04 15:03:17,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:17,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287119269] [2024-06-04 15:03:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:17,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:18,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:18,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287119269] [2024-06-04 15:03:18,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287119269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:18,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:18,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:03:18,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102386696] [2024-06-04 15:03:18,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:18,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:03:18,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:18,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:03:18,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:03:18,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-04 15:03:18,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 175 transitions, 1506 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:18,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:18,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-04 15:03:18,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:21,326 INFO L124 PetriNetUnfolderBase]: 13078/18188 cut-off events. [2024-06-04 15:03:21,327 INFO L125 PetriNetUnfolderBase]: For 308166/308294 co-relation queries the response was YES. [2024-06-04 15:03:21,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95594 conditions, 18188 events. 13078/18188 cut-off events. For 308166/308294 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 100003 event pairs, 5214 based on Foata normal form. 44/18151 useless extension candidates. Maximal degree in co-relation 95546. Up to 16564 conditions per place. [2024-06-04 15:03:21,510 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 125 selfloop transitions, 96 changer transitions 0/230 dead transitions. [2024-06-04 15:03:21,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 230 transitions, 2172 flow [2024-06-04 15:03:21,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:03:21,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:03:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-04 15:03:21,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47641509433962265 [2024-06-04 15:03:21,512 INFO L175 Difference]: Start difference. First operand has 113 places, 175 transitions, 1506 flow. Second operand 8 states and 202 transitions. [2024-06-04 15:03:21,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 230 transitions, 2172 flow [2024-06-04 15:03:21,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 230 transitions, 2070 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 15:03:22,031 INFO L231 Difference]: Finished difference. Result has 115 places, 178 transitions, 1667 flow [2024-06-04 15:03:22,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1404, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1667, PETRI_PLACES=115, PETRI_TRANSITIONS=178} [2024-06-04 15:03:22,032 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 59 predicate places. [2024-06-04 15:03:22,032 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 178 transitions, 1667 flow [2024-06-04 15:03:22,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:22,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:22,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:22,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 15:03:22,032 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:03:22,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:22,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1333669476, now seen corresponding path program 1 times [2024-06-04 15:03:22,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:22,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351029324] [2024-06-04 15:03:22,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:22,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:22,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:22,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:22,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351029324] [2024-06-04 15:03:22,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351029324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:22,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:22,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:03:22,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588131682] [2024-06-04 15:03:22,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:22,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:03:22,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:22,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:03:22,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:03:23,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-04 15:03:23,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 178 transitions, 1667 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:23,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:23,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-04 15:03:23,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:25,168 INFO L124 PetriNetUnfolderBase]: 13085/18213 cut-off events. [2024-06-04 15:03:25,168 INFO L125 PetriNetUnfolderBase]: For 334407/334543 co-relation queries the response was YES. [2024-06-04 15:03:25,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99364 conditions, 18213 events. 13085/18213 cut-off events. For 334407/334543 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 100372 event pairs, 5652 based on Foata normal form. 10/18145 useless extension candidates. Maximal degree in co-relation 99315. Up to 17578 conditions per place. [2024-06-04 15:03:25,309 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 182 selfloop transitions, 17 changer transitions 0/208 dead transitions. [2024-06-04 15:03:25,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 208 transitions, 2209 flow [2024-06-04 15:03:25,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:03:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:03:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-04 15:03:25,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44025157232704404 [2024-06-04 15:03:25,312 INFO L175 Difference]: Start difference. First operand has 115 places, 178 transitions, 1667 flow. Second operand 6 states and 140 transitions. [2024-06-04 15:03:25,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 208 transitions, 2209 flow [2024-06-04 15:03:25,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 208 transitions, 1994 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 15:03:25,579 INFO L231 Difference]: Finished difference. Result has 115 places, 182 transitions, 1558 flow [2024-06-04 15:03:25,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1558, PETRI_PLACES=115, PETRI_TRANSITIONS=182} [2024-06-04 15:03:25,579 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 59 predicate places. [2024-06-04 15:03:25,579 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 182 transitions, 1558 flow [2024-06-04 15:03:25,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:25,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:25,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:25,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 15:03:25,580 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:03:25,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:25,580 INFO L85 PathProgramCache]: Analyzing trace with hash 94903532, now seen corresponding path program 2 times [2024-06-04 15:03:25,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:25,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106992036] [2024-06-04 15:03:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:25,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:26,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:26,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106992036] [2024-06-04 15:03:26,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106992036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:26,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:26,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:03:26,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366923217] [2024-06-04 15:03:26,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:26,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:03:26,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:26,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:03:26,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:03:26,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-04 15:03:26,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 182 transitions, 1558 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:26,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:26,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-04 15:03:26,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:29,339 INFO L124 PetriNetUnfolderBase]: 13121/18225 cut-off events. [2024-06-04 15:03:29,339 INFO L125 PetriNetUnfolderBase]: For 365300/365456 co-relation queries the response was YES. [2024-06-04 15:03:29,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102243 conditions, 18225 events. 13121/18225 cut-off events. For 365300/365456 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 100004 event pairs, 5214 based on Foata normal form. 13/18139 useless extension candidates. Maximal degree in co-relation 102193. Up to 16873 conditions per place. [2024-06-04 15:03:29,478 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 123 selfloop transitions, 100 changer transitions 0/232 dead transitions. [2024-06-04 15:03:29,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 232 transitions, 2224 flow [2024-06-04 15:03:29,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:03:29,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:03:29,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 15:03:29,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-04 15:03:29,480 INFO L175 Difference]: Start difference. First operand has 115 places, 182 transitions, 1558 flow. Second operand 8 states and 196 transitions. [2024-06-04 15:03:29,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 232 transitions, 2224 flow [2024-06-04 15:03:29,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 232 transitions, 2150 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-04 15:03:29,745 INFO L231 Difference]: Finished difference. Result has 119 places, 185 transitions, 1761 flow [2024-06-04 15:03:29,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1484, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1761, PETRI_PLACES=119, PETRI_TRANSITIONS=185} [2024-06-04 15:03:29,746 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-04 15:03:29,746 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 185 transitions, 1761 flow [2024-06-04 15:03:29,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:29,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:29,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:29,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 15:03:29,747 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:03:29,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:29,747 INFO L85 PathProgramCache]: Analyzing trace with hash -141271828, now seen corresponding path program 3 times [2024-06-04 15:03:29,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:29,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263180740] [2024-06-04 15:03:29,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:29,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:31,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:31,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263180740] [2024-06-04 15:03:31,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263180740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:31,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:31,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:03:31,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50180281] [2024-06-04 15:03:31,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:31,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:03:31,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:31,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:03:31,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:03:31,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-04 15:03:31,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 185 transitions, 1761 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:31,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:31,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-04 15:03:31,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:33,864 INFO L124 PetriNetUnfolderBase]: 13157/18285 cut-off events. [2024-06-04 15:03:33,866 INFO L125 PetriNetUnfolderBase]: For 405418/405570 co-relation queries the response was YES. [2024-06-04 15:03:33,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106543 conditions, 18285 events. 13157/18285 cut-off events. For 405418/405570 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 100301 event pairs, 5246 based on Foata normal form. 9/18195 useless extension candidates. Maximal degree in co-relation 106492. Up to 16925 conditions per place. [2024-06-04 15:03:34,093 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 128 selfloop transitions, 98 changer transitions 0/235 dead transitions. [2024-06-04 15:03:34,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 235 transitions, 2437 flow [2024-06-04 15:03:34,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:03:34,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:03:34,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-04 15:03:34,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46462264150943394 [2024-06-04 15:03:34,094 INFO L175 Difference]: Start difference. First operand has 119 places, 185 transitions, 1761 flow. Second operand 8 states and 197 transitions. [2024-06-04 15:03:34,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 235 transitions, 2437 flow [2024-06-04 15:03:34,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 235 transitions, 2188 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-04 15:03:34,622 INFO L231 Difference]: Finished difference. Result has 121 places, 188 transitions, 1791 flow [2024-06-04 15:03:34,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1512, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1791, PETRI_PLACES=121, PETRI_TRANSITIONS=188} [2024-06-04 15:03:34,622 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 65 predicate places. [2024-06-04 15:03:34,623 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 188 transitions, 1791 flow [2024-06-04 15:03:34,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:34,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:34,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:34,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 15:03:34,623 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)] === [2024-06-04 15:03:34,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:34,624 INFO L85 PathProgramCache]: Analyzing trace with hash -822749988, now seen corresponding path program 4 times [2024-06-04 15:03:34,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:34,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197993466] [2024-06-04 15:03:34,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:34,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:35,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:35,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:35,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197993466] [2024-06-04 15:03:35,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197993466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:35,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:35,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:03:35,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129538684] [2024-06-04 15:03:35,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:35,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:03:35,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:35,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:03:35,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:03:36,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-04 15:03:36,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 188 transitions, 1791 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:36,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:36,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-04 15:03:36,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:39,175 INFO L124 PetriNetUnfolderBase]: 13142/18256 cut-off events. [2024-06-04 15:03:39,176 INFO L125 PetriNetUnfolderBase]: For 442094/442250 co-relation queries the response was YES. [2024-06-04 15:03:39,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109110 conditions, 18256 events. 13142/18256 cut-off events. For 442094/442250 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 100222 event pairs, 4830 based on Foata normal form. 13/18170 useless extension candidates. Maximal degree in co-relation 109058. Up to 16516 conditions per place. [2024-06-04 15:03:39,348 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 121 selfloop transitions, 111 changer transitions 0/241 dead transitions. [2024-06-04 15:03:39,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 241 transitions, 2495 flow [2024-06-04 15:03:39,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:03:39,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:03:39,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-04 15:03:39,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-04 15:03:39,349 INFO L175 Difference]: Start difference. First operand has 121 places, 188 transitions, 1791 flow. Second operand 8 states and 200 transitions. [2024-06-04 15:03:39,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 241 transitions, 2495 flow [2024-06-04 15:03:39,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 241 transitions, 2244 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-04 15:03:39,767 INFO L231 Difference]: Finished difference. Result has 123 places, 191 transitions, 1850 flow [2024-06-04 15:03:39,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1540, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1850, PETRI_PLACES=123, PETRI_TRANSITIONS=191} [2024-06-04 15:03:39,767 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 67 predicate places. [2024-06-04 15:03:39,767 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 191 transitions, 1850 flow [2024-06-04 15:03:39,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:39,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:39,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:39,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 15:03:39,768 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:03:39,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:39,768 INFO L85 PathProgramCache]: Analyzing trace with hash 515398746, now seen corresponding path program 2 times [2024-06-04 15:03:39,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:39,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370366581] [2024-06-04 15:03:39,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:39,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:39,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:40,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:40,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370366581] [2024-06-04 15:03:40,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370366581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:40,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:40,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:03:40,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821140771] [2024-06-04 15:03:40,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:40,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:03:40,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:40,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:03:40,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:03:40,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-04 15:03:40,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 191 transitions, 1850 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:40,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:40,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-04 15:03:40,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:43,459 INFO L124 PetriNetUnfolderBase]: 13135/18293 cut-off events. [2024-06-04 15:03:43,459 INFO L125 PetriNetUnfolderBase]: For 480815/480977 co-relation queries the response was YES. [2024-06-04 15:03:43,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112090 conditions, 18293 events. 13135/18293 cut-off events. For 480815/480977 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 100774 event pairs, 5654 based on Foata normal form. 18/18231 useless extension candidates. Maximal degree in co-relation 112037. Up to 17634 conditions per place. [2024-06-04 15:03:43,660 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 183 selfloop transitions, 24 changer transitions 0/216 dead transitions. [2024-06-04 15:03:43,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 216 transitions, 2412 flow [2024-06-04 15:03:43,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:03:43,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:03:43,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-04 15:03:43,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276729559748428 [2024-06-04 15:03:43,661 INFO L175 Difference]: Start difference. First operand has 123 places, 191 transitions, 1850 flow. Second operand 6 states and 136 transitions. [2024-06-04 15:03:43,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 216 transitions, 2412 flow [2024-06-04 15:03:44,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 216 transitions, 2128 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-04 15:03:44,103 INFO L231 Difference]: Finished difference. Result has 123 places, 195 transitions, 1705 flow [2024-06-04 15:03:44,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1705, PETRI_PLACES=123, PETRI_TRANSITIONS=195} [2024-06-04 15:03:44,104 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 67 predicate places. [2024-06-04 15:03:44,104 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 195 transitions, 1705 flow [2024-06-04 15:03:44,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:44,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:44,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:44,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 15:03:44,105 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)] === [2024-06-04 15:03:44,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:44,105 INFO L85 PathProgramCache]: Analyzing trace with hash 515197308, now seen corresponding path program 1 times [2024-06-04 15:03:44,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:44,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706774630] [2024-06-04 15:03:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:44,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:45,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:45,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706774630] [2024-06-04 15:03:45,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706774630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:45,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:45,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:03:45,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773485996] [2024-06-04 15:03:45,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:45,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:03:45,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:45,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:03:45,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:03:45,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-04 15:03:45,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 195 transitions, 1705 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:45,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:45,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-04 15:03:45,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:47,298 INFO L124 PetriNetUnfolderBase]: 11462/16522 cut-off events. [2024-06-04 15:03:47,298 INFO L125 PetriNetUnfolderBase]: For 439975/440145 co-relation queries the response was YES. [2024-06-04 15:03:47,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101669 conditions, 16522 events. 11462/16522 cut-off events. For 439975/440145 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 95945 event pairs, 4789 based on Foata normal form. 2/16413 useless extension candidates. Maximal degree in co-relation 101615. Up to 15464 conditions per place. [2024-06-04 15:03:47,472 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 196 selfloop transitions, 14 changer transitions 0/220 dead transitions. [2024-06-04 15:03:47,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 220 transitions, 2257 flow [2024-06-04 15:03:47,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:03:47,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:03:47,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-04 15:03:47,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44654088050314467 [2024-06-04 15:03:47,474 INFO L175 Difference]: Start difference. First operand has 123 places, 195 transitions, 1705 flow. Second operand 6 states and 142 transitions. [2024-06-04 15:03:47,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 220 transitions, 2257 flow [2024-06-04 15:03:47,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 220 transitions, 2148 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-04 15:03:47,800 INFO L231 Difference]: Finished difference. Result has 125 places, 199 transitions, 1707 flow [2024-06-04 15:03:47,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1596, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1707, PETRI_PLACES=125, PETRI_TRANSITIONS=199} [2024-06-04 15:03:47,801 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-06-04 15:03:47,801 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 199 transitions, 1707 flow [2024-06-04 15:03:47,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:47,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:47,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:47,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 15:03:47,801 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)] === [2024-06-04 15:03:47,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:47,802 INFO L85 PathProgramCache]: Analyzing trace with hash 515404698, now seen corresponding path program 2 times [2024-06-04 15:03:47,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:47,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558128168] [2024-06-04 15:03:47,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:47,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:48,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:48,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558128168] [2024-06-04 15:03:48,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558128168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:48,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:48,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:03:48,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653243793] [2024-06-04 15:03:48,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:48,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:03:48,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:48,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:03:48,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:03:48,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-04 15:03:48,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 199 transitions, 1707 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:48,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:48,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-04 15:03:48,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:51,110 INFO L124 PetriNetUnfolderBase]: 11455/16515 cut-off events. [2024-06-04 15:03:51,110 INFO L125 PetriNetUnfolderBase]: For 472789/472982 co-relation queries the response was YES. [2024-06-04 15:03:51,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104811 conditions, 16515 events. 11455/16515 cut-off events. For 472789/472982 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 96043 event pairs, 4796 based on Foata normal form. 6/16409 useless extension candidates. Maximal degree in co-relation 104756. Up to 15437 conditions per place. [2024-06-04 15:03:51,288 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 190 selfloop transitions, 21 changer transitions 0/221 dead transitions. [2024-06-04 15:03:51,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 221 transitions, 2259 flow [2024-06-04 15:03:51,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:03:51,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:03:51,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-04 15:03:51,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44339622641509435 [2024-06-04 15:03:51,290 INFO L175 Difference]: Start difference. First operand has 125 places, 199 transitions, 1707 flow. Second operand 6 states and 141 transitions. [2024-06-04 15:03:51,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 221 transitions, 2259 flow [2024-06-04 15:03:51,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 221 transitions, 2178 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-04 15:03:51,871 INFO L231 Difference]: Finished difference. Result has 127 places, 203 transitions, 1759 flow [2024-06-04 15:03:51,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1626, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1759, PETRI_PLACES=127, PETRI_TRANSITIONS=203} [2024-06-04 15:03:51,871 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-04 15:03:51,871 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 203 transitions, 1759 flow [2024-06-04 15:03:51,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:51,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:51,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:51,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 15:03:51,872 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)] === [2024-06-04 15:03:51,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:51,873 INFO L85 PathProgramCache]: Analyzing trace with hash 515412634, now seen corresponding path program 1 times [2024-06-04 15:03:51,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:51,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662131401] [2024-06-04 15:03:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:51,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:53,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:53,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662131401] [2024-06-04 15:03:53,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662131401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:53,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:53,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:03:53,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826714985] [2024-06-04 15:03:53,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:53,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:03:53,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:53,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:03:53,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:03:53,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-04 15:03:53,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 203 transitions, 1759 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:53,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:53,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-04 15:03:53,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:55,640 INFO L124 PetriNetUnfolderBase]: 12576/17657 cut-off events. [2024-06-04 15:03:55,641 INFO L125 PetriNetUnfolderBase]: For 577787/577789 co-relation queries the response was YES. [2024-06-04 15:03:55,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117551 conditions, 17657 events. 12576/17657 cut-off events. For 577787/577789 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 98089 event pairs, 5488 based on Foata normal form. 3/17658 useless extension candidates. Maximal degree in co-relation 117495. Up to 16997 conditions per place. [2024-06-04 15:03:55,802 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 199 selfloop transitions, 27 changer transitions 0/232 dead transitions. [2024-06-04 15:03:55,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 232 transitions, 2471 flow [2024-06-04 15:03:55,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:03:55,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:03:55,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-04 15:03:55,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.431266846361186 [2024-06-04 15:03:55,804 INFO L175 Difference]: Start difference. First operand has 127 places, 203 transitions, 1759 flow. Second operand 7 states and 160 transitions. [2024-06-04 15:03:55,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 232 transitions, 2471 flow [2024-06-04 15:03:56,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 232 transitions, 2368 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-04 15:03:56,199 INFO L231 Difference]: Finished difference. Result has 130 places, 208 transitions, 1810 flow [2024-06-04 15:03:56,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1810, PETRI_PLACES=130, PETRI_TRANSITIONS=208} [2024-06-04 15:03:56,201 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-06-04 15:03:56,202 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 208 transitions, 1810 flow [2024-06-04 15:03:56,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:56,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:56,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:56,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 15:03:56,203 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:03:56,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:56,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1235434358, now seen corresponding path program 1 times [2024-06-04 15:03:56,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:56,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406542647] [2024-06-04 15:03:56,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:56,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:57,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:57,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:57,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406542647] [2024-06-04 15:03:57,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406542647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:57,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:57,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:03:57,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571336611] [2024-06-04 15:03:57,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:57,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:03:57,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:57,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:03:57,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:03:57,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-04 15:03:57,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 208 transitions, 1810 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:57,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:57,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-04 15:03:57,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:04:00,395 INFO L124 PetriNetUnfolderBase]: 13763/19062 cut-off events. [2024-06-04 15:04:00,395 INFO L125 PetriNetUnfolderBase]: For 747598/747675 co-relation queries the response was YES. [2024-06-04 15:04:00,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135632 conditions, 19062 events. 13763/19062 cut-off events. For 747598/747675 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 104409 event pairs, 4141 based on Foata normal form. 29/18940 useless extension candidates. Maximal degree in co-relation 135575. Up to 16590 conditions per place. [2024-06-04 15:04:00,582 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 156 selfloop transitions, 101 changer transitions 0/267 dead transitions. [2024-06-04 15:04:00,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 267 transitions, 2782 flow [2024-06-04 15:04:00,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:04:00,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:04:00,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-04 15:04:00,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858490566037736 [2024-06-04 15:04:00,584 INFO L175 Difference]: Start difference. First operand has 130 places, 208 transitions, 1810 flow. Second operand 8 states and 206 transitions. [2024-06-04 15:04:00,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 267 transitions, 2782 flow [2024-06-04 15:04:01,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 267 transitions, 2664 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-04 15:04:01,026 INFO L231 Difference]: Finished difference. Result has 133 places, 212 transitions, 2043 flow [2024-06-04 15:04:01,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2043, PETRI_PLACES=133, PETRI_TRANSITIONS=212} [2024-06-04 15:04:01,026 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 77 predicate places. [2024-06-04 15:04:01,026 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 212 transitions, 2043 flow [2024-06-04 15:04:01,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:04:01,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:04:01,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:04:01,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 15:04:01,027 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:04:01,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:04:01,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1233560408, now seen corresponding path program 2 times [2024-06-04 15:04:01,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:04:01,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716473287] [2024-06-04 15:04:01,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:04:01,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:04:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:04:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:04:02,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:04:02,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716473287] [2024-06-04 15:04:02,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716473287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:04:02,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:04:02,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:04:02,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157414321] [2024-06-04 15:04:02,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:04:02,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:04:02,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:04:02,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:04:02,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:04:02,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-04 15:04:02,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 212 transitions, 2043 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:04:02,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:04:02,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-04 15:04:02,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:04:05,686 INFO L124 PetriNetUnfolderBase]: 13881/19233 cut-off events. [2024-06-04 15:04:05,687 INFO L125 PetriNetUnfolderBase]: For 803583/803660 co-relation queries the response was YES. [2024-06-04 15:04:05,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140078 conditions, 19233 events. 13881/19233 cut-off events. For 803583/803660 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 105446 event pairs, 5438 based on Foata normal form. 29/19117 useless extension candidates. Maximal degree in co-relation 140020. Up to 17428 conditions per place. [2024-06-04 15:04:05,866 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 159 selfloop transitions, 99 changer transitions 0/268 dead transitions. [2024-06-04 15:04:05,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 268 transitions, 2805 flow [2024-06-04 15:04:05,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:04:05,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:04:05,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-04 15:04:05,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834905660377358 [2024-06-04 15:04:05,868 INFO L175 Difference]: Start difference. First operand has 133 places, 212 transitions, 2043 flow. Second operand 8 states and 205 transitions. [2024-06-04 15:04:05,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 268 transitions, 2805 flow [2024-06-04 15:04:06,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 268 transitions, 2654 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-04 15:04:06,440 INFO L231 Difference]: Finished difference. Result has 137 places, 214 transitions, 2175 flow [2024-06-04 15:04:06,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1894, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2175, PETRI_PLACES=137, PETRI_TRANSITIONS=214} [2024-06-04 15:04:06,440 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 81 predicate places. [2024-06-04 15:04:06,440 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 214 transitions, 2175 flow [2024-06-04 15:04:06,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:04:06,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:04:06,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:04:06,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 15:04:06,441 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)] === [2024-06-04 15:04:06,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:04:06,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1214481102, now seen corresponding path program 1 times [2024-06-04 15:04:06,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:04:06,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222606983] [2024-06-04 15:04:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:04:06,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:04:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:04:07,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:04:07,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:04:07,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222606983] [2024-06-04 15:04:07,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222606983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:04:07,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:04:07,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:04:07,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089748144] [2024-06-04 15:04:07,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:04:07,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:04:07,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:04:07,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:04:07,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:04:07,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-04 15:04:07,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 214 transitions, 2175 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:04:07,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:04:07,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-04 15:04:07,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand