./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix013.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix013.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix013.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix013.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 19:18:02,924 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:18:02,987 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:18:02,991 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:18:02,992 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:18:03,015 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:18:03,015 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:18:03,015 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:18:03,016 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:18:03,019 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:18:03,019 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:18:03,020 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:18:03,020 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:18:03,021 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:18:03,022 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:18:03,022 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:18:03,022 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:18:03,023 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:18:03,023 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:18:03,023 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:18:03,023 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:18:03,024 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:18:03,024 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:18:03,024 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:18:03,024 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:18:03,025 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:18:03,025 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:18:03,025 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:18:03,026 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:18:03,026 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:18:03,027 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:18:03,027 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:18:03,027 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:18:03,027 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:18:03,027 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:18:03,027 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:18:03,028 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:18:03,028 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:18:03,028 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:18:03,028 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:18:03,028 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:18:03,029 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:18:03,029 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:18:03,029 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:18:03,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:18:03,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:18:03,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:18:03,225 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:18:03,225 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:18:03,226 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix013.opt.i [2024-06-03 19:18:04,270 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:18:04,491 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:18:04,491 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix013.opt.i [2024-06-03 19:18:04,503 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a3c2db87/3c863b67ee3e43f48a56b689f46a1709/FLAGe11dd0ef4 [2024-06-03 19:18:04,516 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a3c2db87/3c863b67ee3e43f48a56b689f46a1709 [2024-06-03 19:18:04,518 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:18:04,519 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:18:04,520 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix013.opt.yml/witness.yml [2024-06-03 19:18:04,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:18:04,760 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:18:04,761 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:18:04,761 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:18:04,765 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:18:04,765 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:18:04" (1/2) ... [2024-06-03 19:18:04,766 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79417eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:18:04, skipping insertion in model container [2024-06-03 19:18:04,766 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:18:04" (1/2) ... [2024-06-03 19:18:04,768 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1c3dbe87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:18:04, skipping insertion in model container [2024-06-03 19:18:04,768 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:18:04" (2/2) ... [2024-06-03 19:18:04,768 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79417eb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:04, skipping insertion in model container [2024-06-03 19:18:04,769 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:18:04" (2/2) ... [2024-06-03 19:18:04,769 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:18:04,880 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:18:04,881 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] ((((((((((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-03 19:18:04,881 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] ((((((((((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-03 19:18:04,881 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] ((((((((((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-03 19:18:04,881 INFO L97 edCorrectnessWitness]: Location invariant before [L879-L879] ((((((((((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-03 19:18:04,882 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:18:04,882 INFO L106 edCorrectnessWitness]: ghost_update [L872-L872] multithreaded = 1; [2024-06-03 19:18:04,916 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:18:05,237 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:18:05,248 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 19:18:05,403 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:18:05,441 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:18:05,442 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:05 WrapperNode [2024-06-03 19:18:05,442 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:18:05,443 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:18:05,443 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:18:05,443 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:18:05,448 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:05" (1/1) ... [2024-06-03 19:18:05,474 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:05" (1/1) ... [2024-06-03 19:18:05,514 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 163 [2024-06-03 19:18:05,514 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:18:05,515 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:18:05,515 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:18:05,516 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:18:05,524 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:05" (1/1) ... [2024-06-03 19:18:05,524 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:05" (1/1) ... [2024-06-03 19:18:05,536 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:05" (1/1) ... [2024-06-03 19:18:05,563 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 19:18:05,563 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:05" (1/1) ... [2024-06-03 19:18:05,563 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:05" (1/1) ... [2024-06-03 19:18:05,574 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:05" (1/1) ... [2024-06-03 19:18:05,582 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:05" (1/1) ... [2024-06-03 19:18:05,585 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:05" (1/1) ... [2024-06-03 19:18:05,591 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:05" (1/1) ... [2024-06-03 19:18:05,594 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:18:05,597 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:18:05,597 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:18:05,598 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:18:05,598 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:05" (1/1) ... [2024-06-03 19:18:05,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:18:05,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:18:05,623 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 19:18:05,625 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 19:18:05,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:18:05,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:18:05,656 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:18:05,657 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:18:05,657 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:18:05,657 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:18:05,657 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:18:05,657 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:18:05,657 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-03 19:18:05,657 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-03 19:18:05,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:18:05,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:18:05,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:18:05,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:18:05,660 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 19:18:05,769 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:18:05,771 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:18:06,165 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:18:06,165 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:18:06,327 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:18:06,327 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:18:06,327 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:18:06 BoogieIcfgContainer [2024-06-03 19:18:06,327 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:18:06,330 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:18:06,330 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:18:06,332 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:18:06,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:18:04" (1/4) ... [2024-06-03 19:18:06,333 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51e26c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:18:06, skipping insertion in model container [2024-06-03 19:18:06,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:18:04" (2/4) ... [2024-06-03 19:18:06,334 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51e26c8a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:18:06, skipping insertion in model container [2024-06-03 19:18:06,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:05" (3/4) ... [2024-06-03 19:18:06,334 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51e26c8a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:18:06, skipping insertion in model container [2024-06-03 19:18:06,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:18:06" (4/4) ... [2024-06-03 19:18:06,335 INFO L112 eAbstractionObserver]: Analyzing ICFG mix013.opt.i [2024-06-03 19:18:06,349 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:18:06,349 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-03 19:18:06,349 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:18:06,398 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:18:06,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-03 19:18:06,461 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-03 19:18:06,462 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:18:06,463 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 95 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 19:18:06,463 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-03 19:18:06,467 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-03 19:18:06,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:18:06,504 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;@6384640f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:18:06,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-03 19:18:06,510 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:18:06,511 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:18:06,511 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:18:06,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:06,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:18:06,512 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 19:18:06,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:06,519 INFO L85 PathProgramCache]: Analyzing trace with hash 28587988, now seen corresponding path program 1 times [2024-06-03 19:18:06,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:06,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415412217] [2024-06-03 19:18:06,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:06,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:07,677 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 19:18:07,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:07,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415412217] [2024-06-03 19:18:07,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415412217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:07,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:07,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:18:07,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086030178] [2024-06-03 19:18:07,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:07,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:18:07,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:07,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:18:07,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:18:07,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 54 [2024-06-03 19:18:07,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 19:18:07,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:07,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 54 [2024-06-03 19:18:07,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:08,699 INFO L124 PetriNetUnfolderBase]: 4867/7024 cut-off events. [2024-06-03 19:18:08,700 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2024-06-03 19:18:08,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13938 conditions, 7024 events. 4867/7024 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 40777 event pairs, 3534 based on Foata normal form. 1/6764 useless extension candidates. Maximal degree in co-relation 13922. Up to 6693 conditions per place. [2024-06-03 19:18:08,739 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 42 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-03 19:18:08,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 231 flow [2024-06-03 19:18:08,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:18:08,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:18:08,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2024-06-03 19:18:08,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-03 19:18:08,750 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 105 transitions. [2024-06-03 19:18:08,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 231 flow [2024-06-03 19:18:08,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 224 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 19:18:08,757 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-03 19:18:08,758 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 19:18:08,761 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-03 19:18:08,761 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-03 19:18:08,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 19:18:08,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:08,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:08,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:18:08,762 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 19:18:08,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:08,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1703311795, now seen corresponding path program 1 times [2024-06-03 19:18:08,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:08,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307295957] [2024-06-03 19:18:08,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:08,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:09,662 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 19:18:09,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:09,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307295957] [2024-06-03 19:18:09,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307295957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:09,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:09,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:18:09,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350551882] [2024-06-03 19:18:09,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:09,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:18:09,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:09,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:18:09,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:18:09,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 54 [2024-06-03 19:18:09,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:09,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:09,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 54 [2024-06-03 19:18:09,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:10,611 INFO L124 PetriNetUnfolderBase]: 5569/7832 cut-off events. [2024-06-03 19:18:10,611 INFO L125 PetriNetUnfolderBase]: For 1726/1726 co-relation queries the response was YES. [2024-06-03 19:18:10,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18021 conditions, 7832 events. 5569/7832 cut-off events. For 1726/1726 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 44169 event pairs, 3437 based on Foata normal form. 4/7766 useless extension candidates. Maximal degree in co-relation 18006. Up to 7610 conditions per place. [2024-06-03 19:18:10,646 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 53 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-03 19:18:10,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 325 flow [2024-06-03 19:18:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:18:10,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:18:10,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-06-03 19:18:10,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6203703703703703 [2024-06-03 19:18:10,648 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 134 transitions. [2024-06-03 19:18:10,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 325 flow [2024-06-03 19:18:10,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:18:10,650 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-03 19:18:10,650 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 19:18:10,651 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-03 19:18:10,651 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-03 19:18:10,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:10,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:10,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:10,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:18:10,652 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 19:18:10,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:10,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1675021728, now seen corresponding path program 1 times [2024-06-03 19:18:10,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:10,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506700862] [2024-06-03 19:18:10,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:10,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:11,580 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 19:18:11,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:11,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506700862] [2024-06-03 19:18:11,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506700862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:11,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:11,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:18:11,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217136468] [2024-06-03 19:18:11,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:11,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:18:11,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:11,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:18:11,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:18:11,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-03 19:18:11,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 19:18:11,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:11,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-03 19:18:11,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:12,784 INFO L124 PetriNetUnfolderBase]: 7070/9869 cut-off events. [2024-06-03 19:18:12,785 INFO L125 PetriNetUnfolderBase]: For 5896/5896 co-relation queries the response was YES. [2024-06-03 19:18:12,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25305 conditions, 9869 events. 7070/9869 cut-off events. For 5896/5896 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 55514 event pairs, 3323 based on Foata normal form. 8/9787 useless extension candidates. Maximal degree in co-relation 25288. Up to 9556 conditions per place. [2024-06-03 19:18:12,837 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 71 selfloop transitions, 16 changer transitions 0/96 dead transitions. [2024-06-03 19:18:12,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 96 transitions, 490 flow [2024-06-03 19:18:12,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:18:12,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:18:12,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-03 19:18:12,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5771604938271605 [2024-06-03 19:18:12,839 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 6 states and 187 transitions. [2024-06-03 19:18:12,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 96 transitions, 490 flow [2024-06-03 19:18:12,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 96 transitions, 462 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-03 19:18:12,843 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 245 flow [2024-06-03 19:18:12,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=245, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-06-03 19:18:12,843 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2024-06-03 19:18:12,844 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 245 flow [2024-06-03 19:18:12,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 19:18:12,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:12,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:12,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:18:12,844 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:18:12,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:12,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1326274383, now seen corresponding path program 1 times [2024-06-03 19:18:12,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:12,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550037227] [2024-06-03 19:18:12,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:12,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:12,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:13,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:13,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550037227] [2024-06-03 19:18:13,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550037227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:13,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:13,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:18:13,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723902936] [2024-06-03 19:18:13,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:13,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:18:13,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:13,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:18:13,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:18:13,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:18:13,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 245 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:13,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:13,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:18:13,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:15,072 INFO L124 PetriNetUnfolderBase]: 7847/11146 cut-off events. [2024-06-03 19:18:15,072 INFO L125 PetriNetUnfolderBase]: For 11423/11423 co-relation queries the response was YES. [2024-06-03 19:18:15,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30947 conditions, 11146 events. 7847/11146 cut-off events. For 11423/11423 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 63687 event pairs, 4266 based on Foata normal form. 3/10964 useless extension candidates. Maximal degree in co-relation 30928. Up to 10669 conditions per place. [2024-06-03 19:18:15,120 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 60 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-03 19:18:15,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 79 transitions, 451 flow [2024-06-03 19:18:15,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:18:15,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:18:15,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-03 19:18:15,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5074074074074074 [2024-06-03 19:18:15,122 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 245 flow. Second operand 5 states and 137 transitions. [2024-06-03 19:18:15,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 79 transitions, 451 flow [2024-06-03 19:18:15,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 79 transitions, 413 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-03 19:18:15,126 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 268 flow [2024-06-03 19:18:15,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-03 19:18:15,127 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 8 predicate places. [2024-06-03 19:18:15,127 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 268 flow [2024-06-03 19:18:15,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:15,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:15,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:15,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:18:15,128 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:18:15,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:15,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1809247243, now seen corresponding path program 1 times [2024-06-03 19:18:15,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:15,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88510511] [2024-06-03 19:18:15,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:15,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:16,071 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 19:18:16,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:16,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88510511] [2024-06-03 19:18:16,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88510511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:16,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:16,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:18:16,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123602883] [2024-06-03 19:18:16,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:16,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:18:16,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:16,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:18:16,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:18:16,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:18:16,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 268 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:16,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:16,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:18:16,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:17,717 INFO L124 PetriNetUnfolderBase]: 7838/11177 cut-off events. [2024-06-03 19:18:17,717 INFO L125 PetriNetUnfolderBase]: For 17344/17344 co-relation queries the response was YES. [2024-06-03 19:18:17,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33718 conditions, 11177 events. 7838/11177 cut-off events. For 17344/17344 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 64251 event pairs, 4142 based on Foata normal form. 3/11036 useless extension candidates. Maximal degree in co-relation 33697. Up to 10642 conditions per place. [2024-06-03 19:18:17,978 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 67 selfloop transitions, 14 changer transitions 0/90 dead transitions. [2024-06-03 19:18:17,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 90 transitions, 520 flow [2024-06-03 19:18:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:18:17,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:18:17,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-03 19:18:17,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030864197530864 [2024-06-03 19:18:17,979 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 268 flow. Second operand 6 states and 163 transitions. [2024-06-03 19:18:17,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 90 transitions, 520 flow [2024-06-03 19:18:17,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 90 transitions, 491 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 19:18:17,985 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 314 flow [2024-06-03 19:18:17,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=314, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2024-06-03 19:18:17,985 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 11 predicate places. [2024-06-03 19:18:17,989 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 314 flow [2024-06-03 19:18:17,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:17,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:17,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:17,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:18:17,990 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 19:18:17,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:17,990 INFO L85 PathProgramCache]: Analyzing trace with hash -583180566, now seen corresponding path program 1 times [2024-06-03 19:18:17,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:17,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917751370] [2024-06-03 19:18:17,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:17,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:18,936 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 19:18:18,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:18,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917751370] [2024-06-03 19:18:18,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917751370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:18,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:18,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:18:18,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897804374] [2024-06-03 19:18:18,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:18,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:18:18,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:18,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:18:18,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:18:19,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:18:19,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 314 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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 19:18:19,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:19,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:18:19,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:20,489 INFO L124 PetriNetUnfolderBase]: 9010/12479 cut-off events. [2024-06-03 19:18:20,489 INFO L125 PetriNetUnfolderBase]: For 30042/30074 co-relation queries the response was YES. [2024-06-03 19:18:20,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41236 conditions, 12479 events. 9010/12479 cut-off events. For 30042/30074 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 68939 event pairs, 4675 based on Foata normal form. 11/12470 useless extension candidates. Maximal degree in co-relation 41214. Up to 12158 conditions per place. [2024-06-03 19:18:20,557 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 75 selfloop transitions, 21 changer transitions 0/104 dead transitions. [2024-06-03 19:18:20,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 104 transitions, 676 flow [2024-06-03 19:18:20,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:18:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:18:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-03 19:18:20,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123456790123457 [2024-06-03 19:18:20,558 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 314 flow. Second operand 6 states and 166 transitions. [2024-06-03 19:18:20,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 104 transitions, 676 flow [2024-06-03 19:18:20,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 104 transitions, 633 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 19:18:20,565 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 396 flow [2024-06-03 19:18:20,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=396, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2024-06-03 19:18:20,565 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 13 predicate places. [2024-06-03 19:18:20,566 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 396 flow [2024-06-03 19:18:20,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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 19:18:20,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:20,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:20,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:18:20,566 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 19:18:20,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:20,567 INFO L85 PathProgramCache]: Analyzing trace with hash -225284016, now seen corresponding path program 2 times [2024-06-03 19:18:20,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:20,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951623816] [2024-06-03 19:18:20,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:20,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:20,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:21,535 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 19:18:21,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:21,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951623816] [2024-06-03 19:18:21,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951623816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:21,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:21,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:18:21,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155332972] [2024-06-03 19:18:21,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:21,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:18:21,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:21,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:18:21,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:18:21,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:18:21,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 396 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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 19:18:21,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:21,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:18:21,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:23,096 INFO L124 PetriNetUnfolderBase]: 9001/12468 cut-off events. [2024-06-03 19:18:23,096 INFO L125 PetriNetUnfolderBase]: For 41191/41221 co-relation queries the response was YES. [2024-06-03 19:18:23,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44373 conditions, 12468 events. 9001/12468 cut-off events. For 41191/41221 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 68671 event pairs, 4678 based on Foata normal form. 9/12457 useless extension candidates. Maximal degree in co-relation 44350. Up to 12149 conditions per place. [2024-06-03 19:18:23,159 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 69 selfloop transitions, 21 changer transitions 0/98 dead transitions. [2024-06-03 19:18:23,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 98 transitions, 638 flow [2024-06-03 19:18:23,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:18:23,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:18:23,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-03 19:18:23,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2024-06-03 19:18:23,160 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 396 flow. Second operand 6 states and 160 transitions. [2024-06-03 19:18:23,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 98 transitions, 638 flow [2024-06-03 19:18:23,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 98 transitions, 584 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-03 19:18:23,173 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 395 flow [2024-06-03 19:18:23,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=395, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-06-03 19:18:23,174 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 17 predicate places. [2024-06-03 19:18:23,174 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 395 flow [2024-06-03 19:18:23,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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 19:18:23,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:23,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:23,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:18:23,175 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 19:18:23,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:23,176 INFO L85 PathProgramCache]: Analyzing trace with hash 2065950328, now seen corresponding path program 1 times [2024-06-03 19:18:23,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:23,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421970243] [2024-06-03 19:18:23,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:23,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:24,121 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 19:18:24,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:24,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421970243] [2024-06-03 19:18:24,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421970243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:24,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:24,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:18:24,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569740491] [2024-06-03 19:18:24,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:24,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:18:24,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:24,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:18:24,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:18:24,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:18:24,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 395 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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 19:18:24,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:24,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:18:24,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:25,682 INFO L124 PetriNetUnfolderBase]: 9092/12606 cut-off events. [2024-06-03 19:18:25,682 INFO L125 PetriNetUnfolderBase]: For 46645/46673 co-relation queries the response was YES. [2024-06-03 19:18:25,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45313 conditions, 12606 events. 9092/12606 cut-off events. For 46645/46673 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 69385 event pairs, 4668 based on Foata normal form. 7/12593 useless extension candidates. Maximal degree in co-relation 45288. Up to 12251 conditions per place. [2024-06-03 19:18:25,760 INFO L140 encePairwiseOnDemand]: 39/54 looper letters, 93 selfloop transitions, 32 changer transitions 0/133 dead transitions. [2024-06-03 19:18:25,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 133 transitions, 870 flow [2024-06-03 19:18:25,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:18:25,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:18:25,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-03 19:18:25,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976851851851852 [2024-06-03 19:18:25,762 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 395 flow. Second operand 8 states and 215 transitions. [2024-06-03 19:18:25,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 133 transitions, 870 flow [2024-06-03 19:18:25,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 133 transitions, 796 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 19:18:25,777 INFO L231 Difference]: Finished difference. Result has 78 places, 93 transitions, 551 flow [2024-06-03 19:18:25,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=551, PETRI_PLACES=78, PETRI_TRANSITIONS=93} [2024-06-03 19:18:25,778 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 21 predicate places. [2024-06-03 19:18:25,778 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 93 transitions, 551 flow [2024-06-03 19:18:25,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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 19:18:25,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:25,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:25,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:18:25,779 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 19:18:25,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:25,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1460268920, now seen corresponding path program 2 times [2024-06-03 19:18:25,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:25,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810788737] [2024-06-03 19:18:25,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:25,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:26,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:26,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810788737] [2024-06-03 19:18:26,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810788737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:26,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:26,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:18:26,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872156264] [2024-06-03 19:18:26,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:26,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:18:26,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:26,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:18:26,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:18:26,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:18:26,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 93 transitions, 551 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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 19:18:26,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:26,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:18:26,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:28,737 INFO L124 PetriNetUnfolderBase]: 9114/12643 cut-off events. [2024-06-03 19:18:28,738 INFO L125 PetriNetUnfolderBase]: For 60568/60600 co-relation queries the response was YES. [2024-06-03 19:18:28,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48901 conditions, 12643 events. 9114/12643 cut-off events. For 60568/60600 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 69554 event pairs, 4526 based on Foata normal form. 11/12633 useless extension candidates. Maximal degree in co-relation 48874. Up to 12258 conditions per place. [2024-06-03 19:18:28,940 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 93 selfloop transitions, 34 changer transitions 0/135 dead transitions. [2024-06-03 19:18:28,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 135 transitions, 979 flow [2024-06-03 19:18:28,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:18:28,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:18:28,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-03 19:18:28,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 19:18:28,943 INFO L175 Difference]: Start difference. First operand has 78 places, 93 transitions, 551 flow. Second operand 7 states and 189 transitions. [2024-06-03 19:18:28,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 135 transitions, 979 flow [2024-06-03 19:18:28,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 135 transitions, 917 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-03 19:18:28,959 INFO L231 Difference]: Finished difference. Result has 82 places, 97 transitions, 628 flow [2024-06-03 19:18:28,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=628, PETRI_PLACES=82, PETRI_TRANSITIONS=97} [2024-06-03 19:18:28,960 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2024-06-03 19:18:28,960 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 97 transitions, 628 flow [2024-06-03 19:18:28,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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 19:18:28,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:28,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:28,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:18:28,960 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 19:18:28,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:28,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1878891712, now seen corresponding path program 1 times [2024-06-03 19:18:28,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:28,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371275190] [2024-06-03 19:18:28,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:28,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:29,901 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 19:18:29,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:29,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371275190] [2024-06-03 19:18:29,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371275190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:29,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:29,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:18:29,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968471150] [2024-06-03 19:18:29,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:29,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:18:29,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:29,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:18:29,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:18:30,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:18:30,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 97 transitions, 628 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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 19:18:30,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:30,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:18:30,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:31,769 INFO L124 PetriNetUnfolderBase]: 9136/12666 cut-off events. [2024-06-03 19:18:31,770 INFO L125 PetriNetUnfolderBase]: For 77010/77044 co-relation queries the response was YES. [2024-06-03 19:18:31,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52253 conditions, 12666 events. 9136/12666 cut-off events. For 77010/77044 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 69782 event pairs, 4398 based on Foata normal form. 17/12662 useless extension candidates. Maximal degree in co-relation 52225. Up to 12263 conditions per place. [2024-06-03 19:18:31,847 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 101 selfloop transitions, 35 changer transitions 0/144 dead transitions. [2024-06-03 19:18:31,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 144 transitions, 1170 flow [2024-06-03 19:18:31,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:18:31,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:18:31,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-03 19:18:31,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5105820105820106 [2024-06-03 19:18:31,848 INFO L175 Difference]: Start difference. First operand has 82 places, 97 transitions, 628 flow. Second operand 7 states and 193 transitions. [2024-06-03 19:18:31,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 144 transitions, 1170 flow [2024-06-03 19:18:31,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 144 transitions, 1055 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-03 19:18:31,872 INFO L231 Difference]: Finished difference. Result has 84 places, 105 transitions, 696 flow [2024-06-03 19:18:31,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=696, PETRI_PLACES=84, PETRI_TRANSITIONS=105} [2024-06-03 19:18:31,873 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 27 predicate places. [2024-06-03 19:18:31,873 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 105 transitions, 696 flow [2024-06-03 19:18:31,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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 19:18:31,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:31,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:31,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:18:31,874 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 19:18:31,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:31,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1460273570, now seen corresponding path program 3 times [2024-06-03 19:18:31,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:31,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703518776] [2024-06-03 19:18:31,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:31,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:32,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:32,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703518776] [2024-06-03 19:18:32,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703518776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:32,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:32,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:18:32,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528396949] [2024-06-03 19:18:32,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:32,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:18:32,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:32,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:18:32,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:18:32,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:18:32,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 105 transitions, 696 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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 19:18:32,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:32,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:18:32,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:34,597 INFO L124 PetriNetUnfolderBase]: 9158/12777 cut-off events. [2024-06-03 19:18:34,598 INFO L125 PetriNetUnfolderBase]: For 77348/77380 co-relation queries the response was YES. [2024-06-03 19:18:34,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52442 conditions, 12777 events. 9158/12777 cut-off events. For 77348/77380 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 71654 event pairs, 4397 based on Foata normal form. 7/12769 useless extension candidates. Maximal degree in co-relation 52413. Up to 12232 conditions per place. [2024-06-03 19:18:34,710 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 91 selfloop transitions, 50 changer transitions 0/149 dead transitions. [2024-06-03 19:18:34,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 149 transitions, 1242 flow [2024-06-03 19:18:34,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:18:34,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:18:34,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-03 19:18:34,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5105820105820106 [2024-06-03 19:18:34,712 INFO L175 Difference]: Start difference. First operand has 84 places, 105 transitions, 696 flow. Second operand 7 states and 193 transitions. [2024-06-03 19:18:34,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 149 transitions, 1242 flow [2024-06-03 19:18:34,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 149 transitions, 1191 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-03 19:18:34,750 INFO L231 Difference]: Finished difference. Result has 88 places, 113 transitions, 864 flow [2024-06-03 19:18:34,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=864, PETRI_PLACES=88, PETRI_TRANSITIONS=113} [2024-06-03 19:18:34,751 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 31 predicate places. [2024-06-03 19:18:34,751 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 113 transitions, 864 flow [2024-06-03 19:18:34,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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 19:18:34,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:34,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:34,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:18:34,751 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 19:18:34,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:34,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1606368920, now seen corresponding path program 2 times [2024-06-03 19:18:34,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:34,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696603821] [2024-06-03 19:18:34,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:34,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:34,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:35,759 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 19:18:35,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:35,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696603821] [2024-06-03 19:18:35,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696603821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:35,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:35,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:18:35,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703766213] [2024-06-03 19:18:35,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:35,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:18:35,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:35,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:18:35,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:18:35,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:18:35,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 113 transitions, 864 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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 19:18:35,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:35,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:18:35,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:37,586 INFO L124 PetriNetUnfolderBase]: 9180/12827 cut-off events. [2024-06-03 19:18:37,587 INFO L125 PetriNetUnfolderBase]: For 96982/97028 co-relation queries the response was YES. [2024-06-03 19:18:37,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55980 conditions, 12827 events. 9180/12827 cut-off events. For 96982/97028 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 72124 event pairs, 4391 based on Foata normal form. 33/12842 useless extension candidates. Maximal degree in co-relation 55949. Up to 12316 conditions per place. [2024-06-03 19:18:37,697 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 106 selfloop transitions, 40 changer transitions 0/154 dead transitions. [2024-06-03 19:18:37,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 154 transitions, 1386 flow [2024-06-03 19:18:37,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:18:37,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:18:37,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-03 19:18:37,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 19:18:37,699 INFO L175 Difference]: Start difference. First operand has 88 places, 113 transitions, 864 flow. Second operand 7 states and 189 transitions. [2024-06-03 19:18:37,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 154 transitions, 1386 flow [2024-06-03 19:18:37,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 154 transitions, 1317 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-03 19:18:37,749 INFO L231 Difference]: Finished difference. Result has 92 places, 117 transitions, 934 flow [2024-06-03 19:18:37,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=934, PETRI_PLACES=92, PETRI_TRANSITIONS=117} [2024-06-03 19:18:37,750 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 35 predicate places. [2024-06-03 19:18:37,750 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 117 transitions, 934 flow [2024-06-03 19:18:37,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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 19:18:37,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:37,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:37,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:18:37,751 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:18:37,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:37,751 INFO L85 PathProgramCache]: Analyzing trace with hash 774962870, now seen corresponding path program 3 times [2024-06-03 19:18:37,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:37,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359130591] [2024-06-03 19:18:37,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:37,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:37,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:38,734 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 19:18:38,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:38,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359130591] [2024-06-03 19:18:38,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359130591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:38,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:38,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:18:38,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530653938] [2024-06-03 19:18:38,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:38,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:18:38,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:38,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:18:38,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:18:38,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:18:38,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 117 transitions, 934 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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 19:18:38,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:38,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:18:38,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:40,564 INFO L124 PetriNetUnfolderBase]: 9171/12815 cut-off events. [2024-06-03 19:18:40,564 INFO L125 PetriNetUnfolderBase]: For 107197/107253 co-relation queries the response was YES. [2024-06-03 19:18:40,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56995 conditions, 12815 events. 9171/12815 cut-off events. For 107197/107253 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 72139 event pairs, 4391 based on Foata normal form. 49/12849 useless extension candidates. Maximal degree in co-relation 56962. Up to 12307 conditions per place. [2024-06-03 19:18:40,670 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 104 selfloop transitions, 39 changer transitions 0/151 dead transitions. [2024-06-03 19:18:40,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 151 transitions, 1336 flow [2024-06-03 19:18:40,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:18:40,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:18:40,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-03 19:18:40,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947089947089947 [2024-06-03 19:18:40,672 INFO L175 Difference]: Start difference. First operand has 92 places, 117 transitions, 934 flow. Second operand 7 states and 187 transitions. [2024-06-03 19:18:40,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 151 transitions, 1336 flow [2024-06-03 19:18:40,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 151 transitions, 1212 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-03 19:18:40,743 INFO L231 Difference]: Finished difference. Result has 95 places, 117 transitions, 899 flow [2024-06-03 19:18:40,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=899, PETRI_PLACES=95, PETRI_TRANSITIONS=117} [2024-06-03 19:18:40,744 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2024-06-03 19:18:40,744 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 117 transitions, 899 flow [2024-06-03 19:18:40,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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 19:18:40,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:40,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:40,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:18:40,745 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 19:18:40,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:40,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1637405090, now seen corresponding path program 4 times [2024-06-03 19:18:40,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:40,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662361547] [2024-06-03 19:18:40,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:40,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:41,753 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 19:18:41,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:41,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662361547] [2024-06-03 19:18:41,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662361547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:41,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:41,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:18:41,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429380860] [2024-06-03 19:18:41,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:41,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:18:41,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:41,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:18:41,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:18:41,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:18:41,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 117 transitions, 899 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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 19:18:41,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:41,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:18:41,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:43,563 INFO L124 PetriNetUnfolderBase]: 9162/12794 cut-off events. [2024-06-03 19:18:43,563 INFO L125 PetriNetUnfolderBase]: For 118084/118116 co-relation queries the response was YES. [2024-06-03 19:18:43,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57794 conditions, 12794 events. 9162/12794 cut-off events. For 118084/118116 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 71840 event pairs, 4404 based on Foata normal form. 3/12779 useless extension candidates. Maximal degree in co-relation 57760. Up to 12241 conditions per place. [2024-06-03 19:18:43,658 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 90 selfloop transitions, 50 changer transitions 0/148 dead transitions. [2024-06-03 19:18:43,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 148 transitions, 1277 flow [2024-06-03 19:18:43,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:18:43,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:18:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-03 19:18:43,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947089947089947 [2024-06-03 19:18:43,660 INFO L175 Difference]: Start difference. First operand has 95 places, 117 transitions, 899 flow. Second operand 7 states and 187 transitions. [2024-06-03 19:18:43,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 148 transitions, 1277 flow [2024-06-03 19:18:43,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 148 transitions, 1141 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-03 19:18:43,728 INFO L231 Difference]: Finished difference. Result has 95 places, 117 transitions, 874 flow [2024-06-03 19:18:43,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=874, PETRI_PLACES=95, PETRI_TRANSITIONS=117} [2024-06-03 19:18:43,729 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2024-06-03 19:18:43,729 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 117 transitions, 874 flow [2024-06-03 19:18:43,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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 19:18:43,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:43,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:43,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:18:43,730 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:18:43,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:43,730 INFO L85 PathProgramCache]: Analyzing trace with hash 573014372, now seen corresponding path program 1 times [2024-06-03 19:18:43,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:43,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246318830] [2024-06-03 19:18:43,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:43,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:44,486 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 19:18:44,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:44,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246318830] [2024-06-03 19:18:44,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246318830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:44,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:44,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:18:44,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531992862] [2024-06-03 19:18:44,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:44,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:18:44,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:44,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:18:44,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:18:44,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-03 19:18:44,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 117 transitions, 874 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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 19:18:44,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:44,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-03 19:18:44,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:46,112 INFO L124 PetriNetUnfolderBase]: 8723/12900 cut-off events. [2024-06-03 19:18:46,113 INFO L125 PetriNetUnfolderBase]: For 125204/125221 co-relation queries the response was YES. [2024-06-03 19:18:46,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56710 conditions, 12900 events. 8723/12900 cut-off events. For 125204/125221 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 78440 event pairs, 4644 based on Foata normal form. 19/12902 useless extension candidates. Maximal degree in co-relation 56675. Up to 11777 conditions per place. [2024-06-03 19:18:46,209 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 102 selfloop transitions, 10 changer transitions 0/136 dead transitions. [2024-06-03 19:18:46,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 136 transitions, 1182 flow [2024-06-03 19:18:46,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:18:46,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:18:46,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-03 19:18:46,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-06-03 19:18:46,211 INFO L175 Difference]: Start difference. First operand has 95 places, 117 transitions, 874 flow. Second operand 5 states and 138 transitions. [2024-06-03 19:18:46,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 136 transitions, 1182 flow [2024-06-03 19:18:46,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 136 transitions, 1044 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 19:18:46,315 INFO L231 Difference]: Finished difference. Result has 94 places, 121 transitions, 811 flow [2024-06-03 19:18:46,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=811, PETRI_PLACES=94, PETRI_TRANSITIONS=121} [2024-06-03 19:18:46,317 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 37 predicate places. [2024-06-03 19:18:46,317 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 121 transitions, 811 flow [2024-06-03 19:18:46,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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 19:18:46,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:46,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:46,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:18:46,317 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 19:18:46,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:46,318 INFO L85 PathProgramCache]: Analyzing trace with hash -2090871794, now seen corresponding path program 1 times [2024-06-03 19:18:46,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:46,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526005563] [2024-06-03 19:18:46,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:46,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:47,553 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 19:18:47,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:47,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526005563] [2024-06-03 19:18:47,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526005563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:47,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:47,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:18:47,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981479198] [2024-06-03 19:18:47,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:47,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:18:47,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:47,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:18:47,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:18:47,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:18:47,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 121 transitions, 811 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:18:47,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:47,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:18:47,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:49,425 INFO L124 PetriNetUnfolderBase]: 9170/12756 cut-off events. [2024-06-03 19:18:49,425 INFO L125 PetriNetUnfolderBase]: For 144626/144678 co-relation queries the response was YES. [2024-06-03 19:18:49,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61636 conditions, 12756 events. 9170/12756 cut-off events. For 144626/144678 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 70483 event pairs, 4298 based on Foata normal form. 11/12756 useless extension candidates. Maximal degree in co-relation 61600. Up to 12313 conditions per place. [2024-06-03 19:18:49,504 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 124 selfloop transitions, 38 changer transitions 0/170 dead transitions. [2024-06-03 19:18:49,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 170 transitions, 1341 flow [2024-06-03 19:18:49,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:18:49,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:18:49,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-03 19:18:49,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49537037037037035 [2024-06-03 19:18:49,509 INFO L175 Difference]: Start difference. First operand has 94 places, 121 transitions, 811 flow. Second operand 8 states and 214 transitions. [2024-06-03 19:18:49,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 170 transitions, 1341 flow [2024-06-03 19:18:49,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 170 transitions, 1296 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-03 19:18:49,556 INFO L231 Difference]: Finished difference. Result has 99 places, 125 transitions, 918 flow [2024-06-03 19:18:49,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=918, PETRI_PLACES=99, PETRI_TRANSITIONS=125} [2024-06-03 19:18:49,556 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 42 predicate places. [2024-06-03 19:18:49,556 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 125 transitions, 918 flow [2024-06-03 19:18:49,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:18:49,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:49,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:49,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:18:49,557 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 19:18:49,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:49,557 INFO L85 PathProgramCache]: Analyzing trace with hash -2090722064, now seen corresponding path program 2 times [2024-06-03 19:18:49,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:49,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48859465] [2024-06-03 19:18:49,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:49,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:50,659 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 19:18:50,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:50,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48859465] [2024-06-03 19:18:50,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48859465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:50,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:50,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:18:50,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868085521] [2024-06-03 19:18:50,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:50,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:18:50,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:50,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:18:50,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:18:50,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:18:50,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 125 transitions, 918 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:18:50,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:50,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:18:50,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:53,106 INFO L124 PetriNetUnfolderBase]: 9223/12842 cut-off events. [2024-06-03 19:18:53,106 INFO L125 PetriNetUnfolderBase]: For 167354/167416 co-relation queries the response was YES. [2024-06-03 19:18:53,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65386 conditions, 12842 events. 9223/12842 cut-off events. For 167354/167416 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 71084 event pairs, 4244 based on Foata normal form. 25/12856 useless extension candidates. Maximal degree in co-relation 65349. Up to 12175 conditions per place. [2024-06-03 19:18:53,190 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 99 selfloop transitions, 76 changer transitions 0/183 dead transitions. [2024-06-03 19:18:53,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 183 transitions, 1774 flow [2024-06-03 19:18:53,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:18:53,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:18:53,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-03 19:18:53,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-03 19:18:53,193 INFO L175 Difference]: Start difference. First operand has 99 places, 125 transitions, 918 flow. Second operand 8 states and 224 transitions. [2024-06-03 19:18:53,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 183 transitions, 1774 flow [2024-06-03 19:18:53,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 183 transitions, 1656 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 19:18:53,258 INFO L231 Difference]: Finished difference. Result has 101 places, 137 transitions, 1163 flow [2024-06-03 19:18:53,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1163, PETRI_PLACES=101, PETRI_TRANSITIONS=137} [2024-06-03 19:18:53,259 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 44 predicate places. [2024-06-03 19:18:53,259 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 137 transitions, 1163 flow [2024-06-03 19:18:53,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:18:53,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:53,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:53,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:18:53,259 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 19:18:53,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:53,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1976157912, now seen corresponding path program 3 times [2024-06-03 19:18:53,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:53,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79906563] [2024-06-03 19:18:53,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:53,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:54,277 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 19:18:54,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:54,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79906563] [2024-06-03 19:18:54,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79906563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:54,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:54,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:18:54,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089060720] [2024-06-03 19:18:54,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:54,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:18:54,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:54,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:18:54,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:18:54,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:18:54,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 137 transitions, 1163 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:18:54,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:54,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:18:54,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:56,291 INFO L124 PetriNetUnfolderBase]: 9214/12838 cut-off events. [2024-06-03 19:18:56,291 INFO L125 PetriNetUnfolderBase]: For 194141/194219 co-relation queries the response was YES. [2024-06-03 19:18:56,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68509 conditions, 12838 events. 9214/12838 cut-off events. For 194141/194219 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 70942 event pairs, 4244 based on Foata normal form. 41/12868 useless extension candidates. Maximal degree in co-relation 68471. Up to 12166 conditions per place. [2024-06-03 19:18:56,403 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 98 selfloop transitions, 74 changer transitions 0/180 dead transitions. [2024-06-03 19:18:56,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 180 transitions, 1733 flow [2024-06-03 19:18:56,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:18:56,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:18:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-03 19:18:56,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-03 19:18:56,405 INFO L175 Difference]: Start difference. First operand has 101 places, 137 transitions, 1163 flow. Second operand 8 states and 222 transitions. [2024-06-03 19:18:56,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 180 transitions, 1733 flow [2024-06-03 19:18:56,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 180 transitions, 1602 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-03 19:18:56,636 INFO L231 Difference]: Finished difference. Result has 106 places, 137 transitions, 1191 flow [2024-06-03 19:18:56,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1191, PETRI_PLACES=106, PETRI_TRANSITIONS=137} [2024-06-03 19:18:56,637 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 49 predicate places. [2024-06-03 19:18:56,637 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 137 transitions, 1191 flow [2024-06-03 19:18:56,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:18:56,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:56,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:56,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:18:56,637 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 19:18:56,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:56,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1749526774, now seen corresponding path program 4 times [2024-06-03 19:18:56,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:56,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854463484] [2024-06-03 19:18:56,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:56,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:57,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:57,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854463484] [2024-06-03 19:18:57,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854463484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:57,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:57,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:18:57,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992965863] [2024-06-03 19:18:57,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:57,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:18:57,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:57,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:18:57,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:18:57,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:18:57,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 137 transitions, 1191 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:18:57,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:57,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:18:57,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:59,706 INFO L124 PetriNetUnfolderBase]: 9236/12883 cut-off events. [2024-06-03 19:18:59,707 INFO L125 PetriNetUnfolderBase]: For 210648/210722 co-relation queries the response was YES. [2024-06-03 19:18:59,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69926 conditions, 12883 events. 9236/12883 cut-off events. For 210648/210722 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 71400 event pairs, 4244 based on Foata normal form. 35/12911 useless extension candidates. Maximal degree in co-relation 69886. Up to 12189 conditions per place. [2024-06-03 19:18:59,833 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 95 selfloop transitions, 79 changer transitions 0/182 dead transitions. [2024-06-03 19:18:59,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 182 transitions, 1845 flow [2024-06-03 19:18:59,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:18:59,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:18:59,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-03 19:18:59,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046296296296297 [2024-06-03 19:18:59,843 INFO L175 Difference]: Start difference. First operand has 106 places, 137 transitions, 1191 flow. Second operand 8 states and 218 transitions. [2024-06-03 19:18:59,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 182 transitions, 1845 flow [2024-06-03 19:18:59,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 182 transitions, 1664 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-03 19:18:59,956 INFO L231 Difference]: Finished difference. Result has 107 places, 141 transitions, 1259 flow [2024-06-03 19:18:59,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1259, PETRI_PLACES=107, PETRI_TRANSITIONS=141} [2024-06-03 19:18:59,956 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 50 predicate places. [2024-06-03 19:18:59,956 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 141 transitions, 1259 flow [2024-06-03 19:18:59,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:18:59,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:59,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:59,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:18:59,957 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:18:59,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:59,958 INFO L85 PathProgramCache]: Analyzing trace with hash -780042508, now seen corresponding path program 5 times [2024-06-03 19:18:59,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:59,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962112236] [2024-06-03 19:18:59,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:59,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:00,857 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 19:19:00,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:00,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962112236] [2024-06-03 19:19:00,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962112236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:00,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:00,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:19:00,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262428969] [2024-06-03 19:19:00,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:00,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:19:00,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:00,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:19:00,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:19:00,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:00,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 141 transitions, 1259 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:19:00,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:00,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:00,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:02,796 INFO L124 PetriNetUnfolderBase]: 9258/12921 cut-off events. [2024-06-03 19:19:02,796 INFO L125 PetriNetUnfolderBase]: For 227562/227636 co-relation queries the response was YES. [2024-06-03 19:19:02,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71132 conditions, 12921 events. 9258/12921 cut-off events. For 227562/227636 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 71641 event pairs, 4244 based on Foata normal form. 35/12949 useless extension candidates. Maximal degree in co-relation 71091. Up to 12212 conditions per place. [2024-06-03 19:19:02,917 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 96 selfloop transitions, 82 changer transitions 0/186 dead transitions. [2024-06-03 19:19:02,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 186 transitions, 1927 flow [2024-06-03 19:19:02,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:19:02,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:19:02,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-03 19:19:02,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2024-06-03 19:19:02,919 INFO L175 Difference]: Start difference. First operand has 107 places, 141 transitions, 1259 flow. Second operand 8 states and 219 transitions. [2024-06-03 19:19:02,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 186 transitions, 1927 flow [2024-06-03 19:19:03,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 186 transitions, 1661 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-03 19:19:03,086 INFO L231 Difference]: Finished difference. Result has 109 places, 145 transitions, 1248 flow [2024-06-03 19:19:03,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1011, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1248, PETRI_PLACES=109, PETRI_TRANSITIONS=145} [2024-06-03 19:19:03,086 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 52 predicate places. [2024-06-03 19:19:03,087 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 145 transitions, 1248 flow [2024-06-03 19:19:03,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:19:03,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:03,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:03,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:19:03,087 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 19:19:03,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:03,088 INFO L85 PathProgramCache]: Analyzing trace with hash -772690858, now seen corresponding path program 6 times [2024-06-03 19:19:03,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:03,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132402466] [2024-06-03 19:19:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:03,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:04,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:04,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132402466] [2024-06-03 19:19:04,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132402466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:04,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:04,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:19:04,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152745291] [2024-06-03 19:19:04,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:04,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:19:04,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:04,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:19:04,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:19:04,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:04,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 145 transitions, 1248 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:19:04,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:04,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:04,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:06,343 INFO L124 PetriNetUnfolderBase]: 9249/12909 cut-off events. [2024-06-03 19:19:06,343 INFO L125 PetriNetUnfolderBase]: For 243269/243343 co-relation queries the response was YES. [2024-06-03 19:19:06,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71822 conditions, 12909 events. 9249/12909 cut-off events. For 243269/243343 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 71586 event pairs, 4244 based on Foata normal form. 19/12921 useless extension candidates. Maximal degree in co-relation 71780. Up to 12203 conditions per place. [2024-06-03 19:19:06,440 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 89 selfloop transitions, 86 changer transitions 0/183 dead transitions. [2024-06-03 19:19:06,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 183 transitions, 1718 flow [2024-06-03 19:19:06,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:19:06,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:19:06,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-03 19:19:06,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49537037037037035 [2024-06-03 19:19:06,443 INFO L175 Difference]: Start difference. First operand has 109 places, 145 transitions, 1248 flow. Second operand 8 states and 214 transitions. [2024-06-03 19:19:06,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 183 transitions, 1718 flow [2024-06-03 19:19:06,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 183 transitions, 1489 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-03 19:19:06,562 INFO L231 Difference]: Finished difference. Result has 112 places, 145 transitions, 1202 flow [2024-06-03 19:19:06,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1019, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1202, PETRI_PLACES=112, PETRI_TRANSITIONS=145} [2024-06-03 19:19:06,563 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 55 predicate places. [2024-06-03 19:19:06,563 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 145 transitions, 1202 flow [2024-06-03 19:19:06,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:19:06,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:06,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:06,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:19:06,564 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 19:19:06,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:06,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1738324621, now seen corresponding path program 1 times [2024-06-03 19:19:06,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:06,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771945529] [2024-06-03 19:19:06,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:06,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:07,789 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 19:19:07,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:07,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771945529] [2024-06-03 19:19:07,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771945529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:07,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:07,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:19:07,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750472105] [2024-06-03 19:19:07,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:07,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:19:07,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:07,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:19:07,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:19:07,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:07,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 145 transitions, 1202 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:19:07,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:07,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:07,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:10,032 INFO L124 PetriNetUnfolderBase]: 9902/14196 cut-off events. [2024-06-03 19:19:10,032 INFO L125 PetriNetUnfolderBase]: For 266200/266202 co-relation queries the response was YES. [2024-06-03 19:19:10,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76615 conditions, 14196 events. 9902/14196 cut-off events. For 266200/266202 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 81488 event pairs, 4467 based on Foata normal form. 6/14184 useless extension candidates. Maximal degree in co-relation 76572. Up to 13371 conditions per place. [2024-06-03 19:19:10,146 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 162 selfloop transitions, 21 changer transitions 0/191 dead transitions. [2024-06-03 19:19:10,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 191 transitions, 1777 flow [2024-06-03 19:19:10,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:19:10,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:19:10,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-03 19:19:10,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-03 19:19:10,148 INFO L175 Difference]: Start difference. First operand has 112 places, 145 transitions, 1202 flow. Second operand 8 states and 208 transitions. [2024-06-03 19:19:10,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 191 transitions, 1777 flow [2024-06-03 19:19:10,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 191 transitions, 1566 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 19:19:10,285 INFO L231 Difference]: Finished difference. Result has 113 places, 152 transitions, 1143 flow [2024-06-03 19:19:10,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=998, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1143, PETRI_PLACES=113, PETRI_TRANSITIONS=152} [2024-06-03 19:19:10,286 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 56 predicate places. [2024-06-03 19:19:10,286 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 152 transitions, 1143 flow [2024-06-03 19:19:10,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:19:10,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:10,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:10,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:19:10,287 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 19:19:10,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:10,287 INFO L85 PathProgramCache]: Analyzing trace with hash -178129199, now seen corresponding path program 1 times [2024-06-03 19:19:10,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:10,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255042626] [2024-06-03 19:19:10,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:10,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:11,374 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 19:19:11,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:11,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255042626] [2024-06-03 19:19:11,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255042626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:11,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:11,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:19:11,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912942972] [2024-06-03 19:19:11,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:11,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:19:11,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:11,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:19:11,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:19:11,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:11,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 152 transitions, 1143 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:19:11,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:11,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:11,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:13,862 INFO L124 PetriNetUnfolderBase]: 11017/15351 cut-off events. [2024-06-03 19:19:13,862 INFO L125 PetriNetUnfolderBase]: For 347369/347588 co-relation queries the response was YES. [2024-06-03 19:19:13,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89558 conditions, 15351 events. 11017/15351 cut-off events. For 347369/347588 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 86379 event pairs, 4180 based on Foata normal form. 14/15349 useless extension candidates. Maximal degree in co-relation 89513. Up to 14682 conditions per place. [2024-06-03 19:19:13,994 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 163 selfloop transitions, 43 changer transitions 0/215 dead transitions. [2024-06-03 19:19:13,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 215 transitions, 1989 flow [2024-06-03 19:19:13,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:19:13,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:19:13,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-03 19:19:13,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 19:19:13,998 INFO L175 Difference]: Start difference. First operand has 113 places, 152 transitions, 1143 flow. Second operand 9 states and 243 transitions. [2024-06-03 19:19:13,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 215 transitions, 1989 flow [2024-06-03 19:19:14,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 215 transitions, 1899 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-03 19:19:14,139 INFO L231 Difference]: Finished difference. Result has 117 places, 158 transitions, 1283 flow [2024-06-03 19:19:14,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1283, PETRI_PLACES=117, PETRI_TRANSITIONS=158} [2024-06-03 19:19:14,140 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 60 predicate places. [2024-06-03 19:19:14,140 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 158 transitions, 1283 flow [2024-06-03 19:19:14,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:19:14,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:14,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:14,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:19:14,141 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 19:19:14,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:14,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1246647553, now seen corresponding path program 2 times [2024-06-03 19:19:14,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:14,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256792831] [2024-06-03 19:19:14,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:14,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:15,484 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 19:19:15,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:15,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256792831] [2024-06-03 19:19:15,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256792831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:15,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:15,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:19:15,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233869599] [2024-06-03 19:19:15,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:15,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:19:15,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:15,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:19:15,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:19:15,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:15,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 158 transitions, 1283 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:19:15,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:15,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:15,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:17,835 INFO L124 PetriNetUnfolderBase]: 11002/15320 cut-off events. [2024-06-03 19:19:17,835 INFO L125 PetriNetUnfolderBase]: For 385034/385253 co-relation queries the response was YES. [2024-06-03 19:19:17,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92068 conditions, 15320 events. 11002/15320 cut-off events. For 385034/385253 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 85960 event pairs, 4808 based on Foata normal form. 14/15318 useless extension candidates. Maximal degree in co-relation 92022. Up to 14768 conditions per place. [2024-06-03 19:19:17,980 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 158 selfloop transitions, 37 changer transitions 0/204 dead transitions. [2024-06-03 19:19:17,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 204 transitions, 1825 flow [2024-06-03 19:19:17,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:19:17,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:19:17,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-03 19:19:17,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49537037037037035 [2024-06-03 19:19:17,982 INFO L175 Difference]: Start difference. First operand has 117 places, 158 transitions, 1283 flow. Second operand 8 states and 214 transitions. [2024-06-03 19:19:17,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 204 transitions, 1825 flow [2024-06-03 19:19:18,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 204 transitions, 1672 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-03 19:19:18,210 INFO L231 Difference]: Finished difference. Result has 120 places, 158 transitions, 1215 flow [2024-06-03 19:19:18,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1215, PETRI_PLACES=120, PETRI_TRANSITIONS=158} [2024-06-03 19:19:18,211 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 63 predicate places. [2024-06-03 19:19:18,211 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 158 transitions, 1215 flow [2024-06-03 19:19:18,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:19:18,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:18,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:18,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:19:18,211 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 19:19:18,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:18,212 INFO L85 PathProgramCache]: Analyzing trace with hash -173542439, now seen corresponding path program 3 times [2024-06-03 19:19:18,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:18,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147509607] [2024-06-03 19:19:18,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:18,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:19,224 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 19:19:19,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:19,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147509607] [2024-06-03 19:19:19,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147509607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:19,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:19,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:19:19,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181848509] [2024-06-03 19:19:19,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:19,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:19:19,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:19,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:19:19,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:19:19,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:19,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 158 transitions, 1215 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:19:19,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:19,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:19,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:21,534 INFO L124 PetriNetUnfolderBase]: 11038/15371 cut-off events. [2024-06-03 19:19:21,534 INFO L125 PetriNetUnfolderBase]: For 412655/412872 co-relation queries the response was YES. [2024-06-03 19:19:21,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93366 conditions, 15371 events. 11038/15371 cut-off events. For 412655/412872 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 86387 event pairs, 4821 based on Foata normal form. 10/15365 useless extension candidates. Maximal degree in co-relation 93318. Up to 14745 conditions per place. [2024-06-03 19:19:21,799 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 140 selfloop transitions, 53 changer transitions 0/202 dead transitions. [2024-06-03 19:19:21,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 202 transitions, 1799 flow [2024-06-03 19:19:21,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:19:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:19:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-03 19:19:21,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976851851851852 [2024-06-03 19:19:21,801 INFO L175 Difference]: Start difference. First operand has 120 places, 158 transitions, 1215 flow. Second operand 8 states and 215 transitions. [2024-06-03 19:19:21,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 202 transitions, 1799 flow [2024-06-03 19:19:22,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 202 transitions, 1715 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 19:19:22,096 INFO L231 Difference]: Finished difference. Result has 121 places, 161 transitions, 1323 flow [2024-06-03 19:19:22,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1323, PETRI_PLACES=121, PETRI_TRANSITIONS=161} [2024-06-03 19:19:22,097 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 64 predicate places. [2024-06-03 19:19:22,097 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 161 transitions, 1323 flow [2024-06-03 19:19:22,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:19:22,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:22,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:22,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:19:22,098 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:19:22,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:22,098 INFO L85 PathProgramCache]: Analyzing trace with hash 898646787, now seen corresponding path program 1 times [2024-06-03 19:19:22,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:22,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924475444] [2024-06-03 19:19:22,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:22,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:22,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:22,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924475444] [2024-06-03 19:19:22,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924475444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:22,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:22,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:19:22,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082989997] [2024-06-03 19:19:22,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:22,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:19:22,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:22,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:19:22,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:19:23,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:19:23,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 161 transitions, 1323 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 19:19:23,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:23,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:19:23,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:24,969 INFO L124 PetriNetUnfolderBase]: 10194/14567 cut-off events. [2024-06-03 19:19:24,969 INFO L125 PetriNetUnfolderBase]: For 439791/439836 co-relation queries the response was YES. [2024-06-03 19:19:25,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89647 conditions, 14567 events. 10194/14567 cut-off events. For 439791/439836 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 84572 event pairs, 4917 based on Foata normal form. 23/14535 useless extension candidates. Maximal degree in co-relation 89598. Up to 13654 conditions per place. [2024-06-03 19:19:25,145 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 136 selfloop transitions, 35 changer transitions 0/197 dead transitions. [2024-06-03 19:19:25,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 197 transitions, 1959 flow [2024-06-03 19:19:25,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:19:25,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:19:25,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-03 19:19:25,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216049382716049 [2024-06-03 19:19:25,147 INFO L175 Difference]: Start difference. First operand has 121 places, 161 transitions, 1323 flow. Second operand 6 states and 169 transitions. [2024-06-03 19:19:25,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 197 transitions, 1959 flow [2024-06-03 19:19:25,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 197 transitions, 1793 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-03 19:19:25,482 INFO L231 Difference]: Finished difference. Result has 121 places, 169 transitions, 1364 flow [2024-06-03 19:19:25,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1157, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1364, PETRI_PLACES=121, PETRI_TRANSITIONS=169} [2024-06-03 19:19:25,483 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 64 predicate places. [2024-06-03 19:19:25,483 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 169 transitions, 1364 flow [2024-06-03 19:19:25,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 19:19:25,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:25,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:25,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:19:25,484 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:19:25,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:25,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1588309793, now seen corresponding path program 4 times [2024-06-03 19:19:25,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:25,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241064224] [2024-06-03 19:19:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:25,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:26,532 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 19:19:26,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:26,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241064224] [2024-06-03 19:19:26,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241064224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:26,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:26,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:19:26,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295210458] [2024-06-03 19:19:26,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:26,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:19:26,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:26,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:19:26,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:19:26,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:26,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 169 transitions, 1364 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:19:26,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:26,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:26,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:28,952 INFO L124 PetriNetUnfolderBase]: 11087/15458 cut-off events. [2024-06-03 19:19:28,953 INFO L125 PetriNetUnfolderBase]: For 485991/486204 co-relation queries the response was YES. [2024-06-03 19:19:29,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99690 conditions, 15458 events. 11087/15458 cut-off events. For 485991/486204 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 87195 event pairs, 4795 based on Foata normal form. 6/15447 useless extension candidates. Maximal degree in co-relation 99640. Up to 14808 conditions per place. [2024-06-03 19:19:29,113 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 149 selfloop transitions, 53 changer transitions 0/211 dead transitions. [2024-06-03 19:19:29,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 211 transitions, 1968 flow [2024-06-03 19:19:29,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:19:29,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:19:29,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-03 19:19:29,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2024-06-03 19:19:29,120 INFO L175 Difference]: Start difference. First operand has 121 places, 169 transitions, 1364 flow. Second operand 8 states and 212 transitions. [2024-06-03 19:19:29,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 211 transitions, 1968 flow [2024-06-03 19:19:29,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 211 transitions, 1912 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-03 19:19:29,354 INFO L231 Difference]: Finished difference. Result has 127 places, 172 transitions, 1508 flow [2024-06-03 19:19:29,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1308, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1508, PETRI_PLACES=127, PETRI_TRANSITIONS=172} [2024-06-03 19:19:29,355 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 70 predicate places. [2024-06-03 19:19:29,355 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 172 transitions, 1508 flow [2024-06-03 19:19:29,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:19:29,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:29,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:29,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:19:29,356 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:19:29,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:29,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1167071489, now seen corresponding path program 2 times [2024-06-03 19:19:29,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:29,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927574186] [2024-06-03 19:19:29,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:29,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:30,289 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 19:19:30,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:30,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927574186] [2024-06-03 19:19:30,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927574186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:30,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:30,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:19:30,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055079869] [2024-06-03 19:19:30,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:30,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:19:30,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:30,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:19:30,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:19:30,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:19:30,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 172 transitions, 1508 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 19:19:30,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:30,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:19:30,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:32,583 INFO L124 PetriNetUnfolderBase]: 10163/14515 cut-off events. [2024-06-03 19:19:32,583 INFO L125 PetriNetUnfolderBase]: For 510941/510956 co-relation queries the response was YES. [2024-06-03 19:19:32,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94750 conditions, 14515 events. 10163/14515 cut-off events. For 510941/510956 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 84226 event pairs, 4913 based on Foata normal form. 18/14478 useless extension candidates. Maximal degree in co-relation 94698. Up to 13625 conditions per place. [2024-06-03 19:19:32,723 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 130 selfloop transitions, 35 changer transitions 0/192 dead transitions. [2024-06-03 19:19:32,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 192 transitions, 1898 flow [2024-06-03 19:19:32,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:19:32,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:19:32,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-03 19:19:32,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2024-06-03 19:19:32,724 INFO L175 Difference]: Start difference. First operand has 127 places, 172 transitions, 1508 flow. Second operand 6 states and 160 transitions. [2024-06-03 19:19:32,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 192 transitions, 1898 flow [2024-06-03 19:19:33,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 192 transitions, 1694 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-03 19:19:33,012 INFO L231 Difference]: Finished difference. Result has 127 places, 172 transitions, 1383 flow [2024-06-03 19:19:33,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1304, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1383, PETRI_PLACES=127, PETRI_TRANSITIONS=172} [2024-06-03 19:19:33,012 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 70 predicate places. [2024-06-03 19:19:33,012 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 172 transitions, 1383 flow [2024-06-03 19:19:33,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 19:19:33,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:33,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:33,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:19:33,013 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:19:33,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:33,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1909729235, now seen corresponding path program 1 times [2024-06-03 19:19:33,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:33,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661037136] [2024-06-03 19:19:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:33,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:33,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:33,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661037136] [2024-06-03 19:19:33,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661037136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:33,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:33,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:19:33,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319434594] [2024-06-03 19:19:33,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:33,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:19:33,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:33,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:19:33,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:19:34,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:34,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 172 transitions, 1383 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 19:19:34,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:34,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:34,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:36,136 INFO L124 PetriNetUnfolderBase]: 10063/14397 cut-off events. [2024-06-03 19:19:36,136 INFO L125 PetriNetUnfolderBase]: For 473024/473026 co-relation queries the response was YES. [2024-06-03 19:19:36,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92186 conditions, 14397 events. 10063/14397 cut-off events. For 473024/473026 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 82336 event pairs, 4262 based on Foata normal form. 4/14372 useless extension candidates. Maximal degree in co-relation 92133. Up to 13591 conditions per place. [2024-06-03 19:19:36,280 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 177 selfloop transitions, 21 changer transitions 0/206 dead transitions. [2024-06-03 19:19:36,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 206 transitions, 2103 flow [2024-06-03 19:19:36,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:19:36,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:19:36,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-03 19:19:36,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49691358024691357 [2024-06-03 19:19:36,281 INFO L175 Difference]: Start difference. First operand has 127 places, 172 transitions, 1383 flow. Second operand 6 states and 161 transitions. [2024-06-03 19:19:36,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 206 transitions, 2103 flow [2024-06-03 19:19:36,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 206 transitions, 1998 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-03 19:19:36,555 INFO L231 Difference]: Finished difference. Result has 128 places, 180 transitions, 1477 flow [2024-06-03 19:19:36,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1477, PETRI_PLACES=128, PETRI_TRANSITIONS=180} [2024-06-03 19:19:36,557 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 71 predicate places. [2024-06-03 19:19:36,557 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 180 transitions, 1477 flow [2024-06-03 19:19:36,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 19:19:36,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:36,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:36,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:19:36,558 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:19:36,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:36,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1769907429, now seen corresponding path program 2 times [2024-06-03 19:19:36,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:36,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040161383] [2024-06-03 19:19:36,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:36,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:37,399 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 19:19:37,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:37,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040161383] [2024-06-03 19:19:37,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040161383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:37,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:37,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:19:37,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258480488] [2024-06-03 19:19:37,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:37,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:19:37,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:37,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:19:37,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:19:37,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:37,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 180 transitions, 1477 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 19:19:37,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:37,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:37,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:39,656 INFO L124 PetriNetUnfolderBase]: 10049/14381 cut-off events. [2024-06-03 19:19:39,657 INFO L125 PetriNetUnfolderBase]: For 506935/506941 co-relation queries the response was YES. [2024-06-03 19:19:39,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94875 conditions, 14381 events. 10049/14381 cut-off events. For 506935/506941 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 82243 event pairs, 4239 based on Foata normal form. 8/14363 useless extension candidates. Maximal degree in co-relation 94821. Up to 13579 conditions per place. [2024-06-03 19:19:39,801 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 171 selfloop transitions, 21 changer transitions 0/200 dead transitions. [2024-06-03 19:19:39,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 200 transitions, 1921 flow [2024-06-03 19:19:39,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:19:39,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:19:39,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-03 19:19:39,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4783950617283951 [2024-06-03 19:19:39,802 INFO L175 Difference]: Start difference. First operand has 128 places, 180 transitions, 1477 flow. Second operand 6 states and 155 transitions. [2024-06-03 19:19:39,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 200 transitions, 1921 flow [2024-06-03 19:19:40,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 200 transitions, 1805 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-03 19:19:40,088 INFO L231 Difference]: Finished difference. Result has 132 places, 180 transitions, 1412 flow [2024-06-03 19:19:40,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1412, PETRI_PLACES=132, PETRI_TRANSITIONS=180} [2024-06-03 19:19:40,088 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 75 predicate places. [2024-06-03 19:19:40,089 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 180 transitions, 1412 flow [2024-06-03 19:19:40,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 19:19:40,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:40,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:40,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:19:40,089 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:19:40,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:40,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1420847097, now seen corresponding path program 1 times [2024-06-03 19:19:40,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:40,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465345276] [2024-06-03 19:19:40,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:40,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:41,297 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 19:19:41,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:41,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465345276] [2024-06-03 19:19:41,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465345276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:41,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:41,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:19:41,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636084947] [2024-06-03 19:19:41,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:41,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:19:41,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:41,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:19:41,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:19:41,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:41,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 180 transitions, 1412 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 19:19:41,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:41,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:41,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:44,231 INFO L124 PetriNetUnfolderBase]: 11351/15870 cut-off events. [2024-06-03 19:19:44,231 INFO L125 PetriNetUnfolderBase]: For 659332/659539 co-relation queries the response was YES. [2024-06-03 19:19:44,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110912 conditions, 15870 events. 11351/15870 cut-off events. For 659332/659539 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 90422 event pairs, 4027 based on Foata normal form. 47/15902 useless extension candidates. Maximal degree in co-relation 110856. Up to 14824 conditions per place. [2024-06-03 19:19:44,384 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 197 selfloop transitions, 48 changer transitions 0/254 dead transitions. [2024-06-03 19:19:44,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 254 transitions, 2450 flow [2024-06-03 19:19:44,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:19:44,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:19:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 273 transitions. [2024-06-03 19:19:44,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055555555555555 [2024-06-03 19:19:44,386 INFO L175 Difference]: Start difference. First operand has 132 places, 180 transitions, 1412 flow. Second operand 10 states and 273 transitions. [2024-06-03 19:19:44,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 254 transitions, 2450 flow [2024-06-03 19:19:44,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 254 transitions, 2385 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 19:19:44,767 INFO L231 Difference]: Finished difference. Result has 137 places, 184 transitions, 1596 flow [2024-06-03 19:19:44,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1596, PETRI_PLACES=137, PETRI_TRANSITIONS=184} [2024-06-03 19:19:44,768 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 80 predicate places. [2024-06-03 19:19:44,768 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 184 transitions, 1596 flow [2024-06-03 19:19:44,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 19:19:44,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:44,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:44,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:19:44,768 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:19:44,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:44,769 INFO L85 PathProgramCache]: Analyzing trace with hash -850688111, now seen corresponding path program 2 times [2024-06-03 19:19:44,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:44,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934077194] [2024-06-03 19:19:44,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:44,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:45,972 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 19:19:45,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:45,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934077194] [2024-06-03 19:19:45,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934077194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:45,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:45,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:19:45,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372159526] [2024-06-03 19:19:45,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:45,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:19:45,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:45,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:19:45,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:19:46,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:46,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 184 transitions, 1596 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 19:19:46,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:46,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:46,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:48,746 INFO L124 PetriNetUnfolderBase]: 11428/16005 cut-off events. [2024-06-03 19:19:48,747 INFO L125 PetriNetUnfolderBase]: For 712320/712551 co-relation queries the response was YES. [2024-06-03 19:19:48,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114082 conditions, 16005 events. 11428/16005 cut-off events. For 712320/712551 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 91389 event pairs, 4698 based on Foata normal form. 53/16037 useless extension candidates. Maximal degree in co-relation 114025. Up to 15263 conditions per place. [2024-06-03 19:19:48,930 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 193 selfloop transitions, 40 changer transitions 0/242 dead transitions. [2024-06-03 19:19:48,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 242 transitions, 2336 flow [2024-06-03 19:19:48,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:19:48,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:19:48,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-03 19:19:48,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49588477366255146 [2024-06-03 19:19:48,932 INFO L175 Difference]: Start difference. First operand has 137 places, 184 transitions, 1596 flow. Second operand 9 states and 241 transitions. [2024-06-03 19:19:48,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 242 transitions, 2336 flow [2024-06-03 19:19:49,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 242 transitions, 2227 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 19:19:49,353 INFO L231 Difference]: Finished difference. Result has 140 places, 186 transitions, 1655 flow [2024-06-03 19:19:49,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1655, PETRI_PLACES=140, PETRI_TRANSITIONS=186} [2024-06-03 19:19:49,353 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 83 predicate places. [2024-06-03 19:19:49,353 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 186 transitions, 1655 flow [2024-06-03 19:19:49,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 19:19:49,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:49,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:49,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:19:49,354 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:19:49,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:49,354 INFO L85 PathProgramCache]: Analyzing trace with hash -850835981, now seen corresponding path program 3 times [2024-06-03 19:19:49,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:49,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100604037] [2024-06-03 19:19:49,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:49,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:50,726 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 19:19:50,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:50,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100604037] [2024-06-03 19:19:50,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100604037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:50,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:50,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:19:50,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49573797] [2024-06-03 19:19:50,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:50,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:19:50,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:50,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:19:50,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:19:50,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:50,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 186 transitions, 1655 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 19:19:50,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:50,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:50,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:53,832 INFO L124 PetriNetUnfolderBase]: 11389/15948 cut-off events. [2024-06-03 19:19:53,833 INFO L125 PetriNetUnfolderBase]: For 737286/737493 co-relation queries the response was YES. [2024-06-03 19:19:53,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113962 conditions, 15948 events. 11389/15948 cut-off events. For 737286/737493 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 91053 event pairs, 4653 based on Foata normal form. 47/15980 useless extension candidates. Maximal degree in co-relation 113903. Up to 15054 conditions per place. [2024-06-03 19:19:54,209 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 193 selfloop transitions, 43 changer transitions 0/245 dead transitions. [2024-06-03 19:19:54,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 245 transitions, 2341 flow [2024-06-03 19:19:54,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:19:54,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:19:54,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-03 19:19:54,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020576131687243 [2024-06-03 19:19:54,211 INFO L175 Difference]: Start difference. First operand has 140 places, 186 transitions, 1655 flow. Second operand 9 states and 244 transitions. [2024-06-03 19:19:54,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 245 transitions, 2341 flow [2024-06-03 19:19:54,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 245 transitions, 2213 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-03 19:19:54,601 INFO L231 Difference]: Finished difference. Result has 142 places, 186 transitions, 1622 flow [2024-06-03 19:19:54,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1622, PETRI_PLACES=142, PETRI_TRANSITIONS=186} [2024-06-03 19:19:54,602 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 85 predicate places. [2024-06-03 19:19:54,602 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 186 transitions, 1622 flow [2024-06-03 19:19:54,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 19:19:54,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:54,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:54,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:19:54,603 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:19:54,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:54,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1079336389, now seen corresponding path program 4 times [2024-06-03 19:19:54,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:54,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811759414] [2024-06-03 19:19:54,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:54,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:55,903 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 19:19:55,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:55,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811759414] [2024-06-03 19:19:55,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811759414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:55,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:55,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:19:55,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162815375] [2024-06-03 19:19:55,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:55,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:19:55,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:55,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:19:55,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:19:56,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:56,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 186 transitions, 1622 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 19:19:56,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:56,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:56,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:59,072 INFO L124 PetriNetUnfolderBase]: 11517/16152 cut-off events. [2024-06-03 19:19:59,073 INFO L125 PetriNetUnfolderBase]: For 776321/776538 co-relation queries the response was YES. [2024-06-03 19:19:59,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116139 conditions, 16152 events. 11517/16152 cut-off events. For 776321/776538 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 92581 event pairs, 4734 based on Foata normal form. 92/16226 useless extension candidates. Maximal degree in co-relation 116079. Up to 15172 conditions per place. [2024-06-03 19:19:59,222 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 141 selfloop transitions, 89 changer transitions 0/239 dead transitions. [2024-06-03 19:19:59,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 239 transitions, 2332 flow [2024-06-03 19:19:59,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:19:59,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:19:59,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-06-03 19:19:59,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041152263374485 [2024-06-03 19:19:59,224 INFO L175 Difference]: Start difference. First operand has 142 places, 186 transitions, 1622 flow. Second operand 9 states and 245 transitions. [2024-06-03 19:19:59,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 239 transitions, 2332 flow [2024-06-03 19:19:59,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 239 transitions, 2207 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-03 19:19:59,557 INFO L231 Difference]: Finished difference. Result has 143 places, 188 transitions, 1763 flow [2024-06-03 19:19:59,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1497, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1763, PETRI_PLACES=143, PETRI_TRANSITIONS=188} [2024-06-03 19:19:59,557 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 86 predicate places. [2024-06-03 19:19:59,558 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 188 transitions, 1763 flow [2024-06-03 19:19:59,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 19:19:59,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:59,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:59,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:19:59,558 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:19:59,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:59,559 INFO L85 PathProgramCache]: Analyzing trace with hash -712159961, now seen corresponding path program 5 times [2024-06-03 19:19:59,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:59,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511192370] [2024-06-03 19:19:59,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:59,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:00,834 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 19:20:00,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:00,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511192370] [2024-06-03 19:20:00,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511192370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:00,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:00,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:20:00,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465276366] [2024-06-03 19:20:00,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:00,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:20:00,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:00,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:20:00,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:20:00,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:20:00,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 188 transitions, 1763 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 19:20:00,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:00,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:20:00,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:04,159 INFO L124 PetriNetUnfolderBase]: 11681/16438 cut-off events. [2024-06-03 19:20:04,160 INFO L125 PetriNetUnfolderBase]: For 832862/833087 co-relation queries the response was YES. [2024-06-03 19:20:04,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120069 conditions, 16438 events. 11681/16438 cut-off events. For 832862/833087 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 95001 event pairs, 4658 based on Foata normal form. 92/16501 useless extension candidates. Maximal degree in co-relation 120008. Up to 15386 conditions per place. [2024-06-03 19:20:04,318 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 145 selfloop transitions, 87 changer transitions 0/241 dead transitions. [2024-06-03 19:20:04,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 241 transitions, 2481 flow [2024-06-03 19:20:04,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:20:04,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:20:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-03 19:20:04,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5061728395061729 [2024-06-03 19:20:04,320 INFO L175 Difference]: Start difference. First operand has 143 places, 188 transitions, 1763 flow. Second operand 9 states and 246 transitions. [2024-06-03 19:20:04,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 241 transitions, 2481 flow [2024-06-03 19:20:04,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 241 transitions, 2267 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-03 19:20:04,722 INFO L231 Difference]: Finished difference. Result has 145 places, 190 transitions, 1815 flow [2024-06-03 19:20:04,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1549, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1815, PETRI_PLACES=145, PETRI_TRANSITIONS=190} [2024-06-03 19:20:04,722 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 88 predicate places. [2024-06-03 19:20:04,722 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 190 transitions, 1815 flow [2024-06-03 19:20:04,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 19:20:04,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:04,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:04,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:20:04,723 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:20:04,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:04,723 INFO L85 PathProgramCache]: Analyzing trace with hash -712307831, now seen corresponding path program 6 times [2024-06-03 19:20:04,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:04,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415599095] [2024-06-03 19:20:04,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:04,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:05,975 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 19:20:05,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:05,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415599095] [2024-06-03 19:20:05,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415599095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:05,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:05,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:20:05,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606745651] [2024-06-03 19:20:05,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:05,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:20:05,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:05,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:20:05,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:20:06,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:20:06,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 190 transitions, 1815 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 19:20:06,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:06,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:20:06,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:09,299 INFO L124 PetriNetUnfolderBase]: 11802/16639 cut-off events. [2024-06-03 19:20:09,299 INFO L125 PetriNetUnfolderBase]: For 883575/883776 co-relation queries the response was YES. [2024-06-03 19:20:09,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123588 conditions, 16639 events. 11802/16639 cut-off events. For 883575/883776 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 96367 event pairs, 4579 based on Foata normal form. 86/16702 useless extension candidates. Maximal degree in co-relation 123526. Up to 15281 conditions per place. [2024-06-03 19:20:09,457 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 144 selfloop transitions, 93 changer transitions 0/246 dead transitions. [2024-06-03 19:20:09,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 246 transitions, 2561 flow [2024-06-03 19:20:09,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:20:09,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:20:09,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-06-03 19:20:09,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102880658436214 [2024-06-03 19:20:09,458 INFO L175 Difference]: Start difference. First operand has 145 places, 190 transitions, 1815 flow. Second operand 9 states and 248 transitions. [2024-06-03 19:20:09,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 246 transitions, 2561 flow [2024-06-03 19:20:09,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 246 transitions, 2347 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-03 19:20:09,995 INFO L231 Difference]: Finished difference. Result has 147 places, 192 transitions, 1882 flow [2024-06-03 19:20:09,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1601, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1882, PETRI_PLACES=147, PETRI_TRANSITIONS=192} [2024-06-03 19:20:09,995 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 90 predicate places. [2024-06-03 19:20:09,996 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 192 transitions, 1882 flow [2024-06-03 19:20:09,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 19:20:09,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:09,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:09,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:20:09,996 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:20:09,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:09,997 INFO L85 PathProgramCache]: Analyzing trace with hash -706582100, now seen corresponding path program 1 times [2024-06-03 19:20:09,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:09,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150645268] [2024-06-03 19:20:09,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:09,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:11,239 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 19:20:11,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:11,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150645268] [2024-06-03 19:20:11,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150645268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:11,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:11,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:20:11,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708735854] [2024-06-03 19:20:11,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:11,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:20:11,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:11,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:20:11,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:20:11,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:20:11,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 192 transitions, 1882 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 19:20:11,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:11,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:20:11,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:14,641 INFO L124 PetriNetUnfolderBase]: 12356/17351 cut-off events. [2024-06-03 19:20:14,641 INFO L125 PetriNetUnfolderBase]: For 934843/934853 co-relation queries the response was YES. [2024-06-03 19:20:14,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127247 conditions, 17351 events. 12356/17351 cut-off events. For 934843/934853 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 98765 event pairs, 4873 based on Foata normal form. 14/17359 useless extension candidates. Maximal degree in co-relation 127184. Up to 16618 conditions per place. [2024-06-03 19:20:14,797 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 195 selfloop transitions, 49 changer transitions 0/251 dead transitions. [2024-06-03 19:20:14,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 251 transitions, 2663 flow [2024-06-03 19:20:14,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:20:14,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:20:14,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-03 19:20:14,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-03 19:20:14,799 INFO L175 Difference]: Start difference. First operand has 147 places, 192 transitions, 1882 flow. Second operand 9 states and 234 transitions. [2024-06-03 19:20:14,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 251 transitions, 2663 flow [2024-06-03 19:20:15,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 251 transitions, 2412 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-03 19:20:15,278 INFO L231 Difference]: Finished difference. Result has 150 places, 199 transitions, 1873 flow [2024-06-03 19:20:15,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1873, PETRI_PLACES=150, PETRI_TRANSITIONS=199} [2024-06-03 19:20:15,279 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 93 predicate places. [2024-06-03 19:20:15,279 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 199 transitions, 1873 flow [2024-06-03 19:20:15,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 19:20:15,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:15,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:15,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:20:15,280 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:20:15,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:15,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1963112589, now seen corresponding path program 7 times [2024-06-03 19:20:15,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:15,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517110216] [2024-06-03 19:20:15,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:15,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:16,639 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 19:20:16,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:16,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517110216] [2024-06-03 19:20:16,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517110216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:16,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:16,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:20:16,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531472053] [2024-06-03 19:20:16,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:16,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:20:16,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:16,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:20:16,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:20:16,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:20:16,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 199 transitions, 1873 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 19:20:16,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:16,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:20:16,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:19,846 INFO L124 PetriNetUnfolderBase]: 11912/16893 cut-off events. [2024-06-03 19:20:19,846 INFO L125 PetriNetUnfolderBase]: For 999650/999826 co-relation queries the response was YES. [2024-06-03 19:20:19,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129343 conditions, 16893 events. 11912/16893 cut-off events. For 999650/999826 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 98968 event pairs, 4455 based on Foata normal form. 88/16965 useless extension candidates. Maximal degree in co-relation 129278. Up to 15761 conditions per place.