./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix023_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix023_power.oepc_pso.oepc_rmo.oepc.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/mix023_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix023_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 19:25:45,287 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:25:45,355 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:25:45,359 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:25:45,360 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:25:45,389 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:25:45,390 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:25:45,390 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:25:45,391 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:25:45,394 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:25:45,394 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:25:45,394 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:25:45,395 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:25:45,396 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:25:45,396 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:25:45,396 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:25:45,397 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:25:45,397 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:25:45,397 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:25:45,397 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:25:45,397 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:25:45,398 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:25:45,398 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:25:45,398 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:25:45,398 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:25:45,399 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:25:45,399 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:25:45,399 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:25:45,400 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:25:45,400 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:25:45,401 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:25:45,401 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:25:45,401 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:25:45,401 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:25:45,401 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:25:45,401 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:25:45,402 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:25:45,402 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:25:45,402 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:25:45,402 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:25:45,402 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:25:45,403 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:25:45,403 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:25:45,403 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:25:45,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:25:45,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:25:45,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:25:45,664 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:25:45,667 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:25:45,668 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix023_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-03 19:25:45,836 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:25:45,836 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:25:45,837 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix023_power.oepc_pso.oepc_rmo.oepc.i [2024-06-03 19:25:46,785 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:25:46,981 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:25:46,983 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix023_power.oepc_pso.oepc_rmo.oepc.i [2024-06-03 19:25:46,993 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b5effb93/a760d708b16a4d4f817da72f53fda052/FLAGc4157d08d [2024-06-03 19:25:47,003 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b5effb93/a760d708b16a4d4f817da72f53fda052 [2024-06-03 19:25:47,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:25:47,009 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:25:47,009 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:25:47,010 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:25:47,017 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:25:47,018 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:25:45" (1/2) ... [2024-06-03 19:25:47,018 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31eae1dc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:25:47, skipping insertion in model container [2024-06-03 19:25:47,018 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:25:45" (1/2) ... [2024-06-03 19:25:47,019 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5aa8ebbb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:25:47, skipping insertion in model container [2024-06-03 19:25:47,020 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:25:47" (2/2) ... [2024-06-03 19:25:47,020 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31eae1dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:25:47, skipping insertion in model container [2024-06-03 19:25:47,020 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:25:47" (2/2) ... [2024-06-03 19:25:47,021 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:25:47,157 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:25:47,158 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] ((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_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 || a$r_buff0_thd3 == (_Bool)0) [2024-06-03 19:25:47,158 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] ((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-03 19:25:47,158 INFO L97 edCorrectnessWitness]: Location invariant before [L877-L877] ((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_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 || a$r_buff0_thd3 == (_Bool)0) [2024-06-03 19:25:47,158 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] ((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-03 19:25:47,159 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:25:47,159 INFO L106 edCorrectnessWitness]: ghost_update [L870-L870] multithreaded = 1; [2024-06-03 19:25:47,195 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:25:47,526 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:25:47,536 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:25:47,677 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:25:47,714 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:25:47,714 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:25:47 WrapperNode [2024-06-03 19:25:47,715 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:25:47,716 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:25:47,716 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:25:47,716 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:25:47,721 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:25:47" (1/1) ... [2024-06-03 19:25:47,737 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:25:47" (1/1) ... [2024-06-03 19:25:47,760 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 139 [2024-06-03 19:25:47,760 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:25:47,761 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:25:47,761 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:25:47,761 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:25:47,797 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:25:47" (1/1) ... [2024-06-03 19:25:47,797 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:25:47" (1/1) ... [2024-06-03 19:25:47,803 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:25:47" (1/1) ... [2024-06-03 19:25:47,843 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 19:25:47,843 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:25:47" (1/1) ... [2024-06-03 19:25:47,844 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:25:47" (1/1) ... [2024-06-03 19:25:47,852 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:25:47" (1/1) ... [2024-06-03 19:25:47,853 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:25:47" (1/1) ... [2024-06-03 19:25:47,855 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:25:47" (1/1) ... [2024-06-03 19:25:47,856 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:25:47" (1/1) ... [2024-06-03 19:25:47,859 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:25:47,859 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:25:47,859 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:25:47,860 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:25:47,860 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:25:47" (1/1) ... [2024-06-03 19:25:47,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:25:47,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:25:47,902 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) [2024-06-03 19:25:47,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 19:25:47,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:25:47,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:25:47,945 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:25:47,945 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:25:47,945 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:25:47,945 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:25:47,945 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:25:47,946 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:25:47,946 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-03 19:25:47,946 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-03 19:25:47,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:25:47,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:25:47,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:25:47,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:25:47,948 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:25:48,077 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:25:48,079 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:25:48,430 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:25:48,430 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:25:48,636 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:25:48,636 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:25:48,637 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:25:48 BoogieIcfgContainer [2024-06-03 19:25:48,637 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:25:48,639 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:25:48,639 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:25:48,641 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:25:48,641 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:25:45" (1/4) ... [2024-06-03 19:25:48,642 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6121e527 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:25:48, skipping insertion in model container [2024-06-03 19:25:48,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:25:47" (2/4) ... [2024-06-03 19:25:48,642 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6121e527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:25:48, skipping insertion in model container [2024-06-03 19:25:48,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:25:47" (3/4) ... [2024-06-03 19:25:48,643 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6121e527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:25:48, skipping insertion in model container [2024-06-03 19:25:48,643 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:25:48" (4/4) ... [2024-06-03 19:25:48,644 INFO L112 eAbstractionObserver]: Analyzing ICFG mix023_power.oepc_pso.oepc_rmo.oepc.i [2024-06-03 19:25:48,657 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:25:48,657 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-03 19:25:48,657 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:25:48,704 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:25:48,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-03 19:25:48,756 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-03 19:25:48,756 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:25:48,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 0/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 92 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:25:48,759 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-03 19:25:48,761 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-03 19:25:48,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:25:48,775 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;@1d46c8ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:25:48,776 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-03 19:25:48,780 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:25:48,780 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:25:48,780 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:25:48,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:48,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:25:48,781 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:25:48,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:48,785 INFO L85 PathProgramCache]: Analyzing trace with hash -244134958, now seen corresponding path program 1 times [2024-06-03 19:25:48,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:48,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801452404] [2024-06-03 19:25:48,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:48,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:49,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:49,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801452404] [2024-06-03 19:25:49,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801452404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:49,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:49,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:25:49,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094097787] [2024-06-03 19:25:49,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:49,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:25:49,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:49,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:25:49,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:25:49,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:25:49,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:49,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:49,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:25:49,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:51,710 INFO L124 PetriNetUnfolderBase]: 11595/16082 cut-off events. [2024-06-03 19:25:51,710 INFO L125 PetriNetUnfolderBase]: For 213/213 co-relation queries the response was YES. [2024-06-03 19:25:51,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32220 conditions, 16082 events. 11595/16082 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 90115 event pairs, 9068 based on Foata normal form. 1/15784 useless extension candidates. Maximal degree in co-relation 32204. Up to 15685 conditions per place. [2024-06-03 19:25:51,803 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 46 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-03 19:25:51,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 239 flow [2024-06-03 19:25:51,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:25:51,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:25:51,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2024-06-03 19:25:51,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5987654320987654 [2024-06-03 19:25:51,815 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 97 transitions. [2024-06-03 19:25:51,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 239 flow [2024-06-03 19:25:51,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 232 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 19:25:51,823 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-03 19:25:51,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-03 19:25:51,827 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-03 19:25:51,828 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-03 19:25:51,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:51,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:51,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:51,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:25:51,829 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:25:51,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:51,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1609559409, now seen corresponding path program 1 times [2024-06-03 19:25:51,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:51,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739473457] [2024-06-03 19:25:51,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:51,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:52,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:52,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739473457] [2024-06-03 19:25:52,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739473457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:52,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:52,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:25:52,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825399559] [2024-06-03 19:25:52,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:52,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:25:52,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:52,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:25:52,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:25:52,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:25:52,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:52,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:52,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:25:52,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:54,306 INFO L124 PetriNetUnfolderBase]: 11585/16084 cut-off events. [2024-06-03 19:25:54,307 INFO L125 PetriNetUnfolderBase]: For 2936/2936 co-relation queries the response was YES. [2024-06-03 19:25:54,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36205 conditions, 16084 events. 11585/16084 cut-off events. For 2936/2936 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 90288 event pairs, 8249 based on Foata normal form. 4/16010 useless extension candidates. Maximal degree in co-relation 36190. Up to 15650 conditions per place. [2024-06-03 19:25:54,400 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 56 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-03 19:25:54,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 331 flow [2024-06-03 19:25:54,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:25:54,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:25:54,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-03 19:25:54,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5787037037037037 [2024-06-03 19:25:54,405 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 125 transitions. [2024-06-03 19:25:54,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 331 flow [2024-06-03 19:25:54,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:25:54,409 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-03 19:25:54,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-03 19:25:54,410 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-03 19:25:54,410 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-03 19:25:54,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:54,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:54,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:54,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:25:54,412 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:25:54,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:54,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1643264163, now seen corresponding path program 1 times [2024-06-03 19:25:54,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:54,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447829580] [2024-06-03 19:25:54,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:54,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:55,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:55,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447829580] [2024-06-03 19:25:55,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447829580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:55,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:55,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:25:55,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643967011] [2024-06-03 19:25:55,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:55,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:25:55,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:55,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:25:55,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:25:55,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:25:55,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:55,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:55,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:25:55,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:57,338 INFO L124 PetriNetUnfolderBase]: 14083/19422 cut-off events. [2024-06-03 19:25:57,338 INFO L125 PetriNetUnfolderBase]: For 9789/9789 co-relation queries the response was YES. [2024-06-03 19:25:57,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48205 conditions, 19422 events. 14083/19422 cut-off events. For 9789/9789 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 106785 event pairs, 8523 based on Foata normal form. 7/19359 useless extension candidates. Maximal degree in co-relation 48188. Up to 18867 conditions per place. [2024-06-03 19:25:57,431 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 75 selfloop transitions, 21 changer transitions 0/102 dead transitions. [2024-06-03 19:25:57,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 102 transitions, 549 flow [2024-06-03 19:25:57,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:25:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:25:57,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-03 19:25:57,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-03 19:25:57,433 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 5 states and 159 transitions. [2024-06-03 19:25:57,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 102 transitions, 549 flow [2024-06-03 19:25:57,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 102 transitions, 530 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 19:25:57,438 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 314 flow [2024-06-03 19:25:57,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=314, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-03 19:25:57,439 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2024-06-03 19:25:57,439 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 314 flow [2024-06-03 19:25:57,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:57,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:57,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:57,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:25:57,440 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)] === [2024-06-03 19:25:57,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:57,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1595822920, now seen corresponding path program 1 times [2024-06-03 19:25:57,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:57,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124749721] [2024-06-03 19:25:57,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:57,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:58,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:58,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124749721] [2024-06-03 19:25:58,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124749721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:58,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:58,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:25:58,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737265108] [2024-06-03 19:25:58,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:58,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:25:58,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:58,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:25:58,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:25:58,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:25:58,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:58,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:58,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:25:58,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:00,527 INFO L124 PetriNetUnfolderBase]: 14101/19439 cut-off events. [2024-06-03 19:26:00,527 INFO L125 PetriNetUnfolderBase]: For 23020/23024 co-relation queries the response was YES. [2024-06-03 19:26:00,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55459 conditions, 19439 events. 14101/19439 cut-off events. For 23020/23024 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 106795 event pairs, 7568 based on Foata normal form. 11/19382 useless extension candidates. Maximal degree in co-relation 55439. Up to 18853 conditions per place. [2024-06-03 19:26:00,663 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 85 selfloop transitions, 26 changer transitions 0/117 dead transitions. [2024-06-03 19:26:00,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 117 transitions, 718 flow [2024-06-03 19:26:00,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:26:00,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:26:00,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-03 19:26:00,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5771604938271605 [2024-06-03 19:26:00,667 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 314 flow. Second operand 6 states and 187 transitions. [2024-06-03 19:26:00,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 117 transitions, 718 flow [2024-06-03 19:26:00,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 117 transitions, 706 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-03 19:26:00,679 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 408 flow [2024-06-03 19:26:00,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=408, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2024-06-03 19:26:00,680 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 13 predicate places. [2024-06-03 19:26:00,681 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 408 flow [2024-06-03 19:26:00,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:00,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:00,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:00,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:26:00,681 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:26:00,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:00,682 INFO L85 PathProgramCache]: Analyzing trace with hash -2069095260, now seen corresponding path program 1 times [2024-06-03 19:26:00,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:00,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487993544] [2024-06-03 19:26:00,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:00,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:01,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:01,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487993544] [2024-06-03 19:26:01,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487993544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:01,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:01,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:26:01,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391133093] [2024-06-03 19:26:01,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:01,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:26:01,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:01,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:26:01,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:26:01,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:26:01,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 408 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:01,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:01,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:26:01,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:03,849 INFO L124 PetriNetUnfolderBase]: 14130/19466 cut-off events. [2024-06-03 19:26:03,849 INFO L125 PetriNetUnfolderBase]: For 36457/36461 co-relation queries the response was YES. [2024-06-03 19:26:03,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61108 conditions, 19466 events. 14130/19466 cut-off events. For 36457/36461 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 106843 event pairs, 6467 based on Foata normal form. 18/19420 useless extension candidates. Maximal degree in co-relation 61085. Up to 18818 conditions per place. [2024-06-03 19:26:03,970 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 92 selfloop transitions, 30 changer transitions 0/128 dead transitions. [2024-06-03 19:26:03,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 128 transitions, 862 flow [2024-06-03 19:26:03,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:26:03,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:26:03,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-03 19:26:03,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582010582010583 [2024-06-03 19:26:03,972 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 408 flow. Second operand 7 states and 211 transitions. [2024-06-03 19:26:03,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 128 transitions, 862 flow [2024-06-03 19:26:03,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 128 transitions, 796 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 19:26:03,983 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 447 flow [2024-06-03 19:26:03,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=447, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-03 19:26:03,984 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2024-06-03 19:26:03,984 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 447 flow [2024-06-03 19:26:03,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:03,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:03,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:03,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:26:03,985 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:26:03,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:03,986 INFO L85 PathProgramCache]: Analyzing trace with hash 251974774, now seen corresponding path program 1 times [2024-06-03 19:26:03,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:03,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753706033] [2024-06-03 19:26:03,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:03,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:04,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:04,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753706033] [2024-06-03 19:26:04,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753706033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:04,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:04,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:26:04,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245953471] [2024-06-03 19:26:04,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:04,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:26:04,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:04,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:26:04,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:26:04,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:26:04,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 447 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) [2024-06-03 19:26:04,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:04,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:26:04,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:06,786 INFO L124 PetriNetUnfolderBase]: 14121/19438 cut-off events. [2024-06-03 19:26:06,786 INFO L125 PetriNetUnfolderBase]: For 51455/51455 co-relation queries the response was YES. [2024-06-03 19:26:06,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65511 conditions, 19438 events. 14121/19438 cut-off events. For 51455/51455 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 106659 event pairs, 7483 based on Foata normal form. 3/19379 useless extension candidates. Maximal degree in co-relation 65487. Up to 19033 conditions per place. [2024-06-03 19:26:06,884 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 75 selfloop transitions, 10 changer transitions 0/91 dead transitions. [2024-06-03 19:26:06,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 91 transitions, 661 flow [2024-06-03 19:26:06,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:26:06,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:26:06,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-03 19:26:06,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-03 19:26:06,886 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 447 flow. Second operand 5 states and 125 transitions. [2024-06-03 19:26:06,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 91 transitions, 661 flow [2024-06-03 19:26:06,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 91 transitions, 574 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 19:26:06,898 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 391 flow [2024-06-03 19:26:06,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=391, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-03 19:26:06,898 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2024-06-03 19:26:06,899 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 391 flow [2024-06-03 19:26:06,899 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) [2024-06-03 19:26:06,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:06,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:06,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:26:06,899 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:26:06,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:06,900 INFO L85 PathProgramCache]: Analyzing trace with hash -804575092, now seen corresponding path program 1 times [2024-06-03 19:26:06,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:06,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627319348] [2024-06-03 19:26:06,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:06,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:07,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:07,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627319348] [2024-06-03 19:26:07,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627319348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:07,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:07,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:26:07,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228047822] [2024-06-03 19:26:07,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:07,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:26:07,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:07,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:26:07,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:26:07,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:26:07,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 391 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) [2024-06-03 19:26:07,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:07,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:26:07,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:09,705 INFO L124 PetriNetUnfolderBase]: 14103/19454 cut-off events. [2024-06-03 19:26:09,706 INFO L125 PetriNetUnfolderBase]: For 58709/58709 co-relation queries the response was YES. [2024-06-03 19:26:09,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66486 conditions, 19454 events. 14103/19454 cut-off events. For 58709/58709 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 107131 event pairs, 7191 based on Foata normal form. 6/19388 useless extension candidates. Maximal degree in co-relation 66460. Up to 18979 conditions per place. [2024-06-03 19:26:09,831 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 83 selfloop transitions, 14 changer transitions 0/103 dead transitions. [2024-06-03 19:26:09,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 103 transitions, 681 flow [2024-06-03 19:26:09,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:26:09,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:26:09,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 19:26:09,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45987654320987653 [2024-06-03 19:26:09,833 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 391 flow. Second operand 6 states and 149 transitions. [2024-06-03 19:26:09,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 103 transitions, 681 flow [2024-06-03 19:26:09,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 103 transitions, 652 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 19:26:09,853 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 441 flow [2024-06-03 19:26:09,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=441, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2024-06-03 19:26:09,854 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 17 predicate places. [2024-06-03 19:26:09,855 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 441 flow [2024-06-03 19:26:09,855 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) [2024-06-03 19:26:09,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:09,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:09,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:26:09,855 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:26:09,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:09,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1108730971, now seen corresponding path program 1 times [2024-06-03 19:26:09,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:09,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443652308] [2024-06-03 19:26:09,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:09,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:10,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:10,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443652308] [2024-06-03 19:26:10,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443652308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:10,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:10,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:26:10,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878215455] [2024-06-03 19:26:10,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:10,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:26:10,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:10,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:26:10,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:26:10,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:26:10,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 441 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) [2024-06-03 19:26:10,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:10,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:26:10,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:12,564 INFO L124 PetriNetUnfolderBase]: 14116/19469 cut-off events. [2024-06-03 19:26:12,564 INFO L125 PetriNetUnfolderBase]: For 74883/74891 co-relation queries the response was YES. [2024-06-03 19:26:12,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71043 conditions, 19469 events. 14116/19469 cut-off events. For 74883/74891 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 107136 event pairs, 7311 based on Foata normal form. 14/19411 useless extension candidates. Maximal degree in co-relation 71017. Up to 18911 conditions per place. [2024-06-03 19:26:12,693 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 81 selfloop transitions, 25 changer transitions 0/112 dead transitions. [2024-06-03 19:26:12,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 112 transitions, 802 flow [2024-06-03 19:26:12,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:26:12,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:26:12,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-03 19:26:12,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4876543209876543 [2024-06-03 19:26:12,695 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 441 flow. Second operand 6 states and 158 transitions. [2024-06-03 19:26:12,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 112 transitions, 802 flow [2024-06-03 19:26:12,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 112 transitions, 755 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 19:26:12,715 INFO L231 Difference]: Finished difference. Result has 76 places, 82 transitions, 490 flow [2024-06-03 19:26:12,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=490, PETRI_PLACES=76, PETRI_TRANSITIONS=82} [2024-06-03 19:26:12,716 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 19 predicate places. [2024-06-03 19:26:12,716 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 82 transitions, 490 flow [2024-06-03 19:26:12,717 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) [2024-06-03 19:26:12,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:12,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:12,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:26:12,717 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:26:12,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:12,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1082720731, now seen corresponding path program 2 times [2024-06-03 19:26:12,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:12,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891007541] [2024-06-03 19:26:12,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:12,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:13,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:13,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891007541] [2024-06-03 19:26:13,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891007541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:13,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:13,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:26:13,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672459758] [2024-06-03 19:26:13,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:13,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:26:13,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:13,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:26:13,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:26:13,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:26:13,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 82 transitions, 490 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) [2024-06-03 19:26:13,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:13,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:26:13,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:15,412 INFO L124 PetriNetUnfolderBase]: 14086/19422 cut-off events. [2024-06-03 19:26:15,413 INFO L125 PetriNetUnfolderBase]: For 85549/85549 co-relation queries the response was YES. [2024-06-03 19:26:15,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72413 conditions, 19422 events. 14086/19422 cut-off events. For 85549/85549 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 106851 event pairs, 7304 based on Foata normal form. 3/19353 useless extension candidates. Maximal degree in co-relation 72386. Up to 18967 conditions per place. [2024-06-03 19:26:15,542 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 86 selfloop transitions, 14 changer transitions 0/106 dead transitions. [2024-06-03 19:26:15,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 106 transitions, 752 flow [2024-06-03 19:26:15,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:26:15,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:26:15,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 19:26:15,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2024-06-03 19:26:15,544 INFO L175 Difference]: Start difference. First operand has 76 places, 82 transitions, 490 flow. Second operand 6 states and 148 transitions. [2024-06-03 19:26:15,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 106 transitions, 752 flow [2024-06-03 19:26:15,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 106 transitions, 709 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 19:26:15,572 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 486 flow [2024-06-03 19:26:15,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=486, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2024-06-03 19:26:15,573 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 22 predicate places. [2024-06-03 19:26:15,573 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 486 flow [2024-06-03 19:26:15,573 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) [2024-06-03 19:26:15,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:15,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:15,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:26:15,574 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)] === [2024-06-03 19:26:15,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:15,574 INFO L85 PathProgramCache]: Analyzing trace with hash -279862195, now seen corresponding path program 1 times [2024-06-03 19:26:15,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:15,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124146204] [2024-06-03 19:26:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:15,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:16,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:16,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124146204] [2024-06-03 19:26:16,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124146204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:16,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:16,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:26:16,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741605003] [2024-06-03 19:26:16,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:16,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:26:16,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:16,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:26:16,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:26:16,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:26:16,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 486 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:16,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:16,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:26:16,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:18,464 INFO L124 PetriNetUnfolderBase]: 14236/19473 cut-off events. [2024-06-03 19:26:18,464 INFO L125 PetriNetUnfolderBase]: For 101213/101213 co-relation queries the response was YES. [2024-06-03 19:26:18,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74598 conditions, 19473 events. 14236/19473 cut-off events. For 101213/101213 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 105709 event pairs, 6618 based on Foata normal form. 12/19454 useless extension candidates. Maximal degree in co-relation 74570. Up to 18877 conditions per place. [2024-06-03 19:26:18,567 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 94 selfloop transitions, 35 changer transitions 0/135 dead transitions. [2024-06-03 19:26:18,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 135 transitions, 994 flow [2024-06-03 19:26:18,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:26:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:26:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-03 19:26:18,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-03 19:26:18,568 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 486 flow. Second operand 7 states and 186 transitions. [2024-06-03 19:26:18,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 135 transitions, 994 flow [2024-06-03 19:26:18,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 135 transitions, 934 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 19:26:18,596 INFO L231 Difference]: Finished difference. Result has 81 places, 95 transitions, 629 flow [2024-06-03 19:26:18,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=629, PETRI_PLACES=81, PETRI_TRANSITIONS=95} [2024-06-03 19:26:18,596 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 24 predicate places. [2024-06-03 19:26:18,596 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 95 transitions, 629 flow [2024-06-03 19:26:18,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:18,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:18,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:18,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:26:18,597 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:26:18,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:18,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1020584341, now seen corresponding path program 2 times [2024-06-03 19:26:18,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:18,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730484595] [2024-06-03 19:26:18,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:18,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:18,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:19,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:19,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730484595] [2024-06-03 19:26:19,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730484595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:19,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:19,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:26:19,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683114208] [2024-06-03 19:26:19,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:19,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:26:19,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:19,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:26:19,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:26:19,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:26:19,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 95 transitions, 629 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:19,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:19,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:26:19,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:21,784 INFO L124 PetriNetUnfolderBase]: 14280/19534 cut-off events. [2024-06-03 19:26:21,785 INFO L125 PetriNetUnfolderBase]: For 127457/127457 co-relation queries the response was YES. [2024-06-03 19:26:21,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81275 conditions, 19534 events. 14280/19534 cut-off events. For 127457/127457 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 105999 event pairs, 6854 based on Foata normal form. 6/19510 useless extension candidates. Maximal degree in co-relation 81245. Up to 19147 conditions per place. [2024-06-03 19:26:21,907 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 108 selfloop transitions, 25 changer transitions 0/139 dead transitions. [2024-06-03 19:26:21,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 139 transitions, 1141 flow [2024-06-03 19:26:21,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:26:21,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:26:21,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-03 19:26:21,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-03 19:26:21,909 INFO L175 Difference]: Start difference. First operand has 81 places, 95 transitions, 629 flow. Second operand 7 states and 178 transitions. [2024-06-03 19:26:21,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 139 transitions, 1141 flow [2024-06-03 19:26:21,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 139 transitions, 1100 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-03 19:26:21,949 INFO L231 Difference]: Finished difference. Result has 86 places, 103 transitions, 749 flow [2024-06-03 19:26:21,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=749, PETRI_PLACES=86, PETRI_TRANSITIONS=103} [2024-06-03 19:26:21,950 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 29 predicate places. [2024-06-03 19:26:21,950 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 103 transitions, 749 flow [2024-06-03 19:26:21,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:21,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:21,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:21,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:26:21,951 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:26:21,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:21,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1823810461, now seen corresponding path program 3 times [2024-06-03 19:26:21,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:21,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825137211] [2024-06-03 19:26:21,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:21,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:22,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:22,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825137211] [2024-06-03 19:26:22,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825137211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:22,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:22,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:26:22,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901559191] [2024-06-03 19:26:22,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:22,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:26:22,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:22,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:26:22,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:26:22,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:26:22,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 103 transitions, 749 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:22,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:22,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:26:22,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:24,870 INFO L124 PetriNetUnfolderBase]: 14262/19510 cut-off events. [2024-06-03 19:26:24,870 INFO L125 PetriNetUnfolderBase]: For 146504/146504 co-relation queries the response was YES. [2024-06-03 19:26:24,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83383 conditions, 19510 events. 14262/19510 cut-off events. For 146504/146504 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 105793 event pairs, 6851 based on Foata normal form. 6/19486 useless extension candidates. Maximal degree in co-relation 83350. Up to 19177 conditions per place. [2024-06-03 19:26:25,017 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 111 selfloop transitions, 18 changer transitions 0/135 dead transitions. [2024-06-03 19:26:25,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 135 transitions, 1091 flow [2024-06-03 19:26:25,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:26:25,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:26:25,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-03 19:26:25,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-03 19:26:25,019 INFO L175 Difference]: Start difference. First operand has 86 places, 103 transitions, 749 flow. Second operand 7 states and 172 transitions. [2024-06-03 19:26:25,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 135 transitions, 1091 flow [2024-06-03 19:26:25,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 135 transitions, 1015 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-03 19:26:25,097 INFO L231 Difference]: Finished difference. Result has 90 places, 103 transitions, 720 flow [2024-06-03 19:26:25,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=720, PETRI_PLACES=90, PETRI_TRANSITIONS=103} [2024-06-03 19:26:25,098 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 33 predicate places. [2024-06-03 19:26:25,098 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 103 transitions, 720 flow [2024-06-03 19:26:25,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:25,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:25,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:25,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:26:25,099 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:26:25,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:25,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1516182726, now seen corresponding path program 1 times [2024-06-03 19:26:25,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:25,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36545507] [2024-06-03 19:26:25,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:25,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:25,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:25,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36545507] [2024-06-03 19:26:25,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36545507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:25,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:25,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:26:25,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967471287] [2024-06-03 19:26:25,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:25,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:26:25,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:25,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:26:25,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:26:26,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:26:26,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 103 transitions, 720 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) [2024-06-03 19:26:26,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:26,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:26:26,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:28,423 INFO L124 PetriNetUnfolderBase]: 16177/22505 cut-off events. [2024-06-03 19:26:28,423 INFO L125 PetriNetUnfolderBase]: For 179139/179139 co-relation queries the response was YES. [2024-06-03 19:26:28,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94737 conditions, 22505 events. 16177/22505 cut-off events. For 179139/179139 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 125859 event pairs, 8097 based on Foata normal form. 2/22507 useless extension candidates. Maximal degree in co-relation 94703. Up to 21670 conditions per place. [2024-06-03 19:26:28,623 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 99 selfloop transitions, 10 changer transitions 0/121 dead transitions. [2024-06-03 19:26:28,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 121 transitions, 1012 flow [2024-06-03 19:26:28,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:26:28,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:26:28,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-03 19:26:28,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44814814814814813 [2024-06-03 19:26:28,624 INFO L175 Difference]: Start difference. First operand has 90 places, 103 transitions, 720 flow. Second operand 5 states and 121 transitions. [2024-06-03 19:26:28,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 121 transitions, 1012 flow [2024-06-03 19:26:28,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 121 transitions, 962 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 19:26:28,715 INFO L231 Difference]: Finished difference. Result has 89 places, 107 transitions, 745 flow [2024-06-03 19:26:28,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=745, PETRI_PLACES=89, PETRI_TRANSITIONS=107} [2024-06-03 19:26:28,716 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 32 predicate places. [2024-06-03 19:26:28,716 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 107 transitions, 745 flow [2024-06-03 19:26:28,716 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) [2024-06-03 19:26:28,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:28,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:28,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:26:28,717 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:26:28,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:28,717 INFO L85 PathProgramCache]: Analyzing trace with hash -89606638, now seen corresponding path program 1 times [2024-06-03 19:26:28,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:28,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620886327] [2024-06-03 19:26:28,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:28,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:29,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:29,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620886327] [2024-06-03 19:26:29,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620886327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:29,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:29,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:26:29,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040723830] [2024-06-03 19:26:29,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:29,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:26:29,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:29,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:26:29,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:26:29,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:26:29,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 107 transitions, 745 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:29,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:29,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:26:29,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:31,880 INFO L124 PetriNetUnfolderBase]: 14246/19721 cut-off events. [2024-06-03 19:26:31,881 INFO L125 PetriNetUnfolderBase]: For 181083/181087 co-relation queries the response was YES. [2024-06-03 19:26:31,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89168 conditions, 19721 events. 14246/19721 cut-off events. For 181083/181087 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 108764 event pairs, 6694 based on Foata normal form. 7/19728 useless extension candidates. Maximal degree in co-relation 89133. Up to 19032 conditions per place. [2024-06-03 19:26:32,026 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 115 selfloop transitions, 34 changer transitions 0/155 dead transitions. [2024-06-03 19:26:32,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 155 transitions, 1203 flow [2024-06-03 19:26:32,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:26:32,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:26:32,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-03 19:26:32,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47453703703703703 [2024-06-03 19:26:32,028 INFO L175 Difference]: Start difference. First operand has 89 places, 107 transitions, 745 flow. Second operand 8 states and 205 transitions. [2024-06-03 19:26:32,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 155 transitions, 1203 flow [2024-06-03 19:26:32,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 155 transitions, 1158 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-03 19:26:32,099 INFO L231 Difference]: Finished difference. Result has 94 places, 111 transitions, 834 flow [2024-06-03 19:26:32,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=834, PETRI_PLACES=94, PETRI_TRANSITIONS=111} [2024-06-03 19:26:32,099 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 37 predicate places. [2024-06-03 19:26:32,100 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 111 transitions, 834 flow [2024-06-03 19:26:32,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:32,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:32,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:32,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:26:32,100 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)] === [2024-06-03 19:26:32,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:32,101 INFO L85 PathProgramCache]: Analyzing trace with hash -338514977, now seen corresponding path program 1 times [2024-06-03 19:26:32,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:32,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052229046] [2024-06-03 19:26:32,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:32,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:32,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:32,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052229046] [2024-06-03 19:26:32,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052229046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:32,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:32,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:26:32,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33177980] [2024-06-03 19:26:32,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:32,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:26:32,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:32,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:26:32,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:26:33,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:26:33,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 111 transitions, 834 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:33,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:33,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:26:33,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:35,105 INFO L124 PetriNetUnfolderBase]: 14290/19778 cut-off events. [2024-06-03 19:26:35,105 INFO L125 PetriNetUnfolderBase]: For 209955/209955 co-relation queries the response was YES. [2024-06-03 19:26:35,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94012 conditions, 19778 events. 14290/19778 cut-off events. For 209955/209955 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 108956 event pairs, 6448 based on Foata normal form. 6/19783 useless extension candidates. Maximal degree in co-relation 93976. Up to 18907 conditions per place. [2024-06-03 19:26:35,233 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 104 selfloop transitions, 48 changer transitions 0/158 dead transitions. [2024-06-03 19:26:35,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 158 transitions, 1384 flow [2024-06-03 19:26:35,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:26:35,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:26:35,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-03 19:26:35,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-03 19:26:35,234 INFO L175 Difference]: Start difference. First operand has 94 places, 111 transitions, 834 flow. Second operand 7 states and 190 transitions. [2024-06-03 19:26:35,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 158 transitions, 1384 flow [2024-06-03 19:26:35,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 158 transitions, 1284 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 19:26:35,295 INFO L231 Difference]: Finished difference. Result has 95 places, 115 transitions, 891 flow [2024-06-03 19:26:35,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=891, PETRI_PLACES=95, PETRI_TRANSITIONS=115} [2024-06-03 19:26:35,295 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2024-06-03 19:26:35,295 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 115 transitions, 891 flow [2024-06-03 19:26:35,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:35,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:35,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:35,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:26:35,296 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:26:35,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:35,297 INFO L85 PathProgramCache]: Analyzing trace with hash -338509397, now seen corresponding path program 2 times [2024-06-03 19:26:35,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:35,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114419616] [2024-06-03 19:26:35,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:35,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:36,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:36,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114419616] [2024-06-03 19:26:36,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114419616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:36,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:36,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:26:36,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877062376] [2024-06-03 19:26:36,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:36,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:26:36,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:36,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:26:36,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:26:36,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:26:36,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 115 transitions, 891 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:36,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:36,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:26:36,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:38,493 INFO L124 PetriNetUnfolderBase]: 14334/19838 cut-off events. [2024-06-03 19:26:38,493 INFO L125 PetriNetUnfolderBase]: For 232071/232071 co-relation queries the response was YES. [2024-06-03 19:26:38,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96009 conditions, 19838 events. 14334/19838 cut-off events. For 232071/232071 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 109204 event pairs, 6459 based on Foata normal form. 6/19843 useless extension candidates. Maximal degree in co-relation 95972. Up to 18945 conditions per place. [2024-06-03 19:26:38,638 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 111 selfloop transitions, 49 changer transitions 0/166 dead transitions. [2024-06-03 19:26:38,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 166 transitions, 1481 flow [2024-06-03 19:26:38,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:26:38,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:26:38,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-03 19:26:38,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-03 19:26:38,640 INFO L175 Difference]: Start difference. First operand has 95 places, 115 transitions, 891 flow. Second operand 8 states and 210 transitions. [2024-06-03 19:26:38,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 166 transitions, 1481 flow [2024-06-03 19:26:38,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 166 transitions, 1323 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-03 19:26:38,766 INFO L231 Difference]: Finished difference. Result has 98 places, 119 transitions, 900 flow [2024-06-03 19:26:38,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=900, PETRI_PLACES=98, PETRI_TRANSITIONS=119} [2024-06-03 19:26:38,766 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 41 predicate places. [2024-06-03 19:26:38,767 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 119 transitions, 900 flow [2024-06-03 19:26:38,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:38,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:38,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:38,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:26:38,767 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:26:38,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:38,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1112472533, now seen corresponding path program 3 times [2024-06-03 19:26:38,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:38,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815926906] [2024-06-03 19:26:38,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:38,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:39,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:39,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815926906] [2024-06-03 19:26:39,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815926906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:39,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:39,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:26:39,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782673040] [2024-06-03 19:26:39,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:39,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:26:39,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:39,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:26:39,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:26:39,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:26:39,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 119 transitions, 900 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:39,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:39,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:26:39,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:42,029 INFO L124 PetriNetUnfolderBase]: 14378/19899 cut-off events. [2024-06-03 19:26:42,029 INFO L125 PetriNetUnfolderBase]: For 253974/253974 co-relation queries the response was YES. [2024-06-03 19:26:42,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97693 conditions, 19899 events. 14378/19899 cut-off events. For 253974/253974 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 109596 event pairs, 6692 based on Foata normal form. 6/19905 useless extension candidates. Maximal degree in co-relation 97655. Up to 19253 conditions per place. [2024-06-03 19:26:42,198 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 129 selfloop transitions, 29 changer transitions 0/164 dead transitions. [2024-06-03 19:26:42,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 164 transitions, 1378 flow [2024-06-03 19:26:42,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:26:42,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:26:42,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-03 19:26:42,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46064814814814814 [2024-06-03 19:26:42,200 INFO L175 Difference]: Start difference. First operand has 98 places, 119 transitions, 900 flow. Second operand 8 states and 199 transitions. [2024-06-03 19:26:42,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 164 transitions, 1378 flow [2024-06-03 19:26:42,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 164 transitions, 1280 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 19:26:42,333 INFO L231 Difference]: Finished difference. Result has 101 places, 123 transitions, 931 flow [2024-06-03 19:26:42,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=931, PETRI_PLACES=101, PETRI_TRANSITIONS=123} [2024-06-03 19:26:42,334 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 44 predicate places. [2024-06-03 19:26:42,334 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 123 transitions, 931 flow [2024-06-03 19:26:42,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:42,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:42,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:42,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:26:42,335 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:26:42,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:42,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1915733993, now seen corresponding path program 4 times [2024-06-03 19:26:42,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:42,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272423089] [2024-06-03 19:26:42,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:42,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:43,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:43,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272423089] [2024-06-03 19:26:43,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272423089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:43,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:43,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:26:43,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027617994] [2024-06-03 19:26:43,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:43,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:26:43,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:43,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:26:43,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:26:43,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:26:43,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 123 transitions, 931 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:43,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:43,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:26:43,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:45,523 INFO L124 PetriNetUnfolderBase]: 14360/19875 cut-off events. [2024-06-03 19:26:45,523 INFO L125 PetriNetUnfolderBase]: For 276962/276962 co-relation queries the response was YES. [2024-06-03 19:26:45,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98761 conditions, 19875 events. 14360/19875 cut-off events. For 276962/276962 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 109485 event pairs, 6700 based on Foata normal form. 6/19881 useless extension candidates. Maximal degree in co-relation 98722. Up to 19274 conditions per place. [2024-06-03 19:26:45,675 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 135 selfloop transitions, 22 changer transitions 0/163 dead transitions. [2024-06-03 19:26:45,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 163 transitions, 1351 flow [2024-06-03 19:26:45,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:26:45,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:26:45,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 19:26:45,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4537037037037037 [2024-06-03 19:26:45,677 INFO L175 Difference]: Start difference. First operand has 101 places, 123 transitions, 931 flow. Second operand 8 states and 196 transitions. [2024-06-03 19:26:45,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 163 transitions, 1351 flow [2024-06-03 19:26:45,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 163 transitions, 1248 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-03 19:26:45,831 INFO L231 Difference]: Finished difference. Result has 103 places, 123 transitions, 883 flow [2024-06-03 19:26:45,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=883, PETRI_PLACES=103, PETRI_TRANSITIONS=123} [2024-06-03 19:26:45,832 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 46 predicate places. [2024-06-03 19:26:45,832 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 123 transitions, 883 flow [2024-06-03 19:26:45,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:45,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:45,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:45,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:26:45,832 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:26:45,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:45,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1117946898, now seen corresponding path program 1 times [2024-06-03 19:26:45,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:45,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092337564] [2024-06-03 19:26:45,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:45,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:47,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:47,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092337564] [2024-06-03 19:26:47,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092337564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:47,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:47,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:26:47,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627996259] [2024-06-03 19:26:47,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:47,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:26:47,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:47,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:26:47,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:26:47,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-03 19:26:47,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 123 transitions, 883 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) [2024-06-03 19:26:47,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:47,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-03 19:26:47,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:49,998 INFO L124 PetriNetUnfolderBase]: 16930/23282 cut-off events. [2024-06-03 19:26:49,998 INFO L125 PetriNetUnfolderBase]: For 348572/348572 co-relation queries the response was YES. [2024-06-03 19:26:50,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115168 conditions, 23282 events. 16930/23282 cut-off events. For 348572/348572 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 127234 event pairs, 7974 based on Foata normal form. 6/23288 useless extension candidates. Maximal degree in co-relation 115128. Up to 22701 conditions per place. [2024-06-03 19:26:50,180 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 140 selfloop transitions, 24 changer transitions 0/169 dead transitions. [2024-06-03 19:26:50,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 169 transitions, 1392 flow [2024-06-03 19:26:50,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:26:50,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:26:50,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-03 19:26:50,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4351851851851852 [2024-06-03 19:26:50,185 INFO L175 Difference]: Start difference. First operand has 103 places, 123 transitions, 883 flow. Second operand 8 states and 188 transitions. [2024-06-03 19:26:50,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 169 transitions, 1392 flow [2024-06-03 19:26:50,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 169 transitions, 1278 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-03 19:26:50,370 INFO L231 Difference]: Finished difference. Result has 104 places, 130 transitions, 921 flow [2024-06-03 19:26:50,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=921, PETRI_PLACES=104, PETRI_TRANSITIONS=130} [2024-06-03 19:26:50,371 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 47 predicate places. [2024-06-03 19:26:50,371 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 130 transitions, 921 flow [2024-06-03 19:26:50,371 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) [2024-06-03 19:26:50,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:50,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:50,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:26:50,372 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:26:50,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:50,372 INFO L85 PathProgramCache]: Analyzing trace with hash 268895643, now seen corresponding path program 1 times [2024-06-03 19:26:50,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:50,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970137091] [2024-06-03 19:26:50,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:50,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:51,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:51,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970137091] [2024-06-03 19:26:51,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970137091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:51,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:51,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:26:51,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802680667] [2024-06-03 19:26:51,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:51,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:26:51,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:51,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:26:51,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:26:51,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-03 19:26:51,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 130 transitions, 921 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) [2024-06-03 19:26:51,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:51,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-03 19:26:51,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:54,540 INFO L124 PetriNetUnfolderBase]: 18668/25304 cut-off events. [2024-06-03 19:26:54,540 INFO L125 PetriNetUnfolderBase]: For 439487/439487 co-relation queries the response was YES. [2024-06-03 19:26:54,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130737 conditions, 25304 events. 18668/25304 cut-off events. For 439487/439487 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 134268 event pairs, 9150 based on Foata normal form. 6/25310 useless extension candidates. Maximal degree in co-relation 130695. Up to 24894 conditions per place. [2024-06-03 19:26:54,741 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 132 selfloop transitions, 22 changer transitions 0/166 dead transitions. [2024-06-03 19:26:54,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 166 transitions, 1493 flow [2024-06-03 19:26:54,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:26:54,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:26:54,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-03 19:26:54,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:26:54,742 INFO L175 Difference]: Start difference. First operand has 104 places, 130 transitions, 921 flow. Second operand 6 states and 144 transitions. [2024-06-03 19:26:54,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 166 transitions, 1493 flow [2024-06-03 19:26:54,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 166 transitions, 1409 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 19:26:54,979 INFO L231 Difference]: Finished difference. Result has 107 places, 144 transitions, 1059 flow [2024-06-03 19:26:54,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1059, PETRI_PLACES=107, PETRI_TRANSITIONS=144} [2024-06-03 19:26:54,980 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 50 predicate places. [2024-06-03 19:26:54,980 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 144 transitions, 1059 flow [2024-06-03 19:26:54,980 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) [2024-06-03 19:26:54,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:54,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:54,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:26:54,981 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:26:54,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:54,981 INFO L85 PathProgramCache]: Analyzing trace with hash -814314316, now seen corresponding path program 1 times [2024-06-03 19:26:54,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:54,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928808976] [2024-06-03 19:26:54,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:54,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:56,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:56,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928808976] [2024-06-03 19:26:56,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928808976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:56,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:56,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:26:56,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941572392] [2024-06-03 19:26:56,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:56,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:26:56,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:56,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:26:56,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:26:56,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:26:56,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 144 transitions, 1059 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:56,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:56,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:26:56,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:59,447 INFO L124 PetriNetUnfolderBase]: 17121/23740 cut-off events. [2024-06-03 19:26:59,447 INFO L125 PetriNetUnfolderBase]: For 452203/452377 co-relation queries the response was YES. [2024-06-03 19:26:59,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129296 conditions, 23740 events. 17121/23740 cut-off events. For 452203/452377 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 133815 event pairs, 6640 based on Foata normal form. 10/23692 useless extension candidates. Maximal degree in co-relation 129251. Up to 22606 conditions per place. [2024-06-03 19:26:59,651 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 149 selfloop transitions, 40 changer transitions 0/199 dead transitions. [2024-06-03 19:26:59,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 199 transitions, 1789 flow [2024-06-03 19:26:59,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:26:59,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:26:59,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-03 19:26:59,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-03 19:26:59,653 INFO L175 Difference]: Start difference. First operand has 107 places, 144 transitions, 1059 flow. Second operand 8 states and 208 transitions. [2024-06-03 19:26:59,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 199 transitions, 1789 flow [2024-06-03 19:26:59,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 199 transitions, 1743 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-03 19:26:59,853 INFO L231 Difference]: Finished difference. Result has 114 places, 150 transitions, 1221 flow [2024-06-03 19:26:59,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1221, PETRI_PLACES=114, PETRI_TRANSITIONS=150} [2024-06-03 19:26:59,853 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 57 predicate places. [2024-06-03 19:26:59,854 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 150 transitions, 1221 flow [2024-06-03 19:26:59,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:59,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:59,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:59,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:26:59,854 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:26:59,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:59,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1517163534, now seen corresponding path program 1 times [2024-06-03 19:26:59,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:59,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734600994] [2024-06-03 19:26:59,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:59,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:00,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:00,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734600994] [2024-06-03 19:27:00,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734600994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:00,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:00,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:27:00,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808737426] [2024-06-03 19:27:00,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:00,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:27:00,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:00,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:27:00,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:27:01,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:27:01,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 150 transitions, 1221 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:01,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:01,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:27:01,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:04,253 INFO L124 PetriNetUnfolderBase]: 17251/23869 cut-off events. [2024-06-03 19:27:04,253 INFO L125 PetriNetUnfolderBase]: For 507968/508142 co-relation queries the response was YES. [2024-06-03 19:27:04,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134276 conditions, 23869 events. 17251/23869 cut-off events. For 507968/508142 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 134593 event pairs, 6710 based on Foata normal form. 10/23790 useless extension candidates. Maximal degree in co-relation 134228. Up to 22367 conditions per place. [2024-06-03 19:27:04,435 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 133 selfloop transitions, 77 changer transitions 0/220 dead transitions. [2024-06-03 19:27:04,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 220 transitions, 2243 flow [2024-06-03 19:27:04,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:27:04,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:27:04,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-03 19:27:04,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023148148148148 [2024-06-03 19:27:04,437 INFO L175 Difference]: Start difference. First operand has 114 places, 150 transitions, 1221 flow. Second operand 8 states and 217 transitions. [2024-06-03 19:27:04,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 220 transitions, 2243 flow [2024-06-03 19:27:04,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 220 transitions, 2142 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-03 19:27:04,704 INFO L231 Difference]: Finished difference. Result has 120 places, 166 transitions, 1557 flow [2024-06-03 19:27:04,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1557, PETRI_PLACES=120, PETRI_TRANSITIONS=166} [2024-06-03 19:27:04,705 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 63 predicate places. [2024-06-03 19:27:04,705 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 166 transitions, 1557 flow [2024-06-03 19:27:04,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:04,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:04,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:04,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:27:04,706 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:27:04,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:04,706 INFO L85 PathProgramCache]: Analyzing trace with hash -2022120288, now seen corresponding path program 2 times [2024-06-03 19:27:04,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:04,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792385672] [2024-06-03 19:27:04,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:04,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:05,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:05,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792385672] [2024-06-03 19:27:05,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792385672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:05,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:05,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:27:05,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393712368] [2024-06-03 19:27:05,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:05,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:27:05,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:05,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:27:05,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:27:06,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:27:06,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 166 transitions, 1557 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:06,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:06,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:27:06,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:09,646 INFO L124 PetriNetUnfolderBase]: 17232/23845 cut-off events. [2024-06-03 19:27:09,646 INFO L125 PetriNetUnfolderBase]: For 563892/564066 co-relation queries the response was YES. [2024-06-03 19:27:09,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140602 conditions, 23845 events. 17232/23845 cut-off events. For 563892/564066 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 134323 event pairs, 7077 based on Foata normal form. 10/23770 useless extension candidates. Maximal degree in co-relation 140550. Up to 22863 conditions per place. [2024-06-03 19:27:09,844 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 167 selfloop transitions, 41 changer transitions 0/218 dead transitions. [2024-06-03 19:27:09,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 218 transitions, 2107 flow [2024-06-03 19:27:09,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:27:09,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:27:09,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-03 19:27:09,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2024-06-03 19:27:09,845 INFO L175 Difference]: Start difference. First operand has 120 places, 166 transitions, 1557 flow. Second operand 9 states and 228 transitions. [2024-06-03 19:27:09,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 218 transitions, 2107 flow [2024-06-03 19:27:10,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 218 transitions, 1988 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-03 19:27:10,139 INFO L231 Difference]: Finished difference. Result has 127 places, 166 transitions, 1531 flow [2024-06-03 19:27:10,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1438, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1531, PETRI_PLACES=127, PETRI_TRANSITIONS=166} [2024-06-03 19:27:10,140 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 70 predicate places. [2024-06-03 19:27:10,140 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 166 transitions, 1531 flow [2024-06-03 19:27:10,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:10,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:10,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:10,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:27:10,140 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:27:10,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:10,141 INFO L85 PathProgramCache]: Analyzing trace with hash -814191432, now seen corresponding path program 2 times [2024-06-03 19:27:10,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:10,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514294299] [2024-06-03 19:27:10,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:10,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:10,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:11,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:11,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514294299] [2024-06-03 19:27:11,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514294299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:11,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:11,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:27:11,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69273866] [2024-06-03 19:27:11,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:11,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:27:11,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:11,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:27:11,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:27:11,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:27:11,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 166 transitions, 1531 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:11,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:11,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:27:11,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:14,725 INFO L124 PetriNetUnfolderBase]: 17240/23883 cut-off events. [2024-06-03 19:27:14,725 INFO L125 PetriNetUnfolderBase]: For 598734/598908 co-relation queries the response was YES. [2024-06-03 19:27:14,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142219 conditions, 23883 events. 17240/23883 cut-off events. For 598734/598908 co-relation queries the response was YES. Maximal size of possible extension queue 787. Compared 134922 event pairs, 7047 based on Foata normal form. 10/23819 useless extension candidates. Maximal degree in co-relation 142165. Up to 22574 conditions per place. [2024-06-03 19:27:14,924 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 141 selfloop transitions, 67 changer transitions 0/218 dead transitions. [2024-06-03 19:27:14,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 218 transitions, 2273 flow [2024-06-03 19:27:14,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:27:14,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:27:14,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-03 19:27:14,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48842592592592593 [2024-06-03 19:27:14,926 INFO L175 Difference]: Start difference. First operand has 127 places, 166 transitions, 1531 flow. Second operand 8 states and 211 transitions. [2024-06-03 19:27:14,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 218 transitions, 2273 flow [2024-06-03 19:27:15,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 218 transitions, 2180 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 19:27:15,298 INFO L231 Difference]: Finished difference. Result has 127 places, 170 transitions, 1649 flow [2024-06-03 19:27:15,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1438, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1649, PETRI_PLACES=127, PETRI_TRANSITIONS=170} [2024-06-03 19:27:15,299 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 70 predicate places. [2024-06-03 19:27:15,299 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 170 transitions, 1649 flow [2024-06-03 19:27:15,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:15,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:15,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:15,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:27:15,300 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:27:15,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:15,300 INFO L85 PathProgramCache]: Analyzing trace with hash -2019323654, now seen corresponding path program 3 times [2024-06-03 19:27:15,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:15,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079157547] [2024-06-03 19:27:15,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:15,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat