./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix013.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix013.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix013.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix013.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 19:17:54,455 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:17:54,497 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:17:54,506 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:17:54,506 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:17:54,526 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:17:54,527 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:17:54,527 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:17:54,527 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:17:54,528 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:17:54,528 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:17:54,528 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:17:54,529 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:17:54,529 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:17:54,529 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:17:54,529 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:17:54,529 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:17:54,530 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:17:54,530 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:17:54,530 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:17:54,530 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:17:54,533 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:17:54,533 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:17:54,534 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:17:54,534 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:17:54,534 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:17:54,534 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:17:54,535 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:17:54,535 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:17:54,535 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:17:54,535 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:17:54,536 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:17:54,536 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:17:54,536 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:17:54,536 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:17:54,537 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:17:54,537 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:17:54,537 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:17:54,537 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:17:54,537 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:17:54,538 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:17:54,543 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:17:54,544 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:17:54,548 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:17:54,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:17:54,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:17:54,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:17:54,758 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:17:54,759 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:17:54,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix013.oepc.i [2024-06-03 19:17:55,755 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:17:55,967 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:17:55,968 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix013.oepc.i [2024-06-03 19:17:55,980 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4fce8926/7ee62c55293a40d08d65ca1fdbf5ba27/FLAG8be333748 [2024-06-03 19:17:55,990 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4fce8926/7ee62c55293a40d08d65ca1fdbf5ba27 [2024-06-03 19:17:55,992 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:17:55,992 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:17:55,993 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix013.oepc.yml/witness.yml [2024-06-03 19:17:56,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:17:56,147 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:17:56,152 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:17:56,152 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:17:56,156 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:17:56,157 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:17:55" (1/2) ... [2024-06-03 19:17:56,157 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28c47dae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:17:56, skipping insertion in model container [2024-06-03 19:17:56,158 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:17:55" (1/2) ... [2024-06-03 19:17:56,159 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1960cf10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:17:56, skipping insertion in model container [2024-06-03 19:17:56,159 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:17:56" (2/2) ... [2024-06-03 19:17:56,160 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28c47dae and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:17:56, skipping insertion in model container [2024-06-03 19:17:56,160 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:17:56" (2/2) ... [2024-06-03 19:17:56,160 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:17:56,261 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:17:56,263 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] ((((((((((((((((((((((((! multithreaded || a$read_delayed == (_Bool)0) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-03 19:17:56,263 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] ((((((((((((((((((((((((! multithreaded || a$read_delayed == (_Bool)0) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! 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 || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-03 19:17:56,263 INFO L97 edCorrectnessWitness]: Location invariant before [L880-L880] ((((((((((((((((((((((((! multithreaded || a$read_delayed == (_Bool)0) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-03 19:17:56,263 INFO L97 edCorrectnessWitness]: Location invariant before [L881-L881] ((((((((((((((((((((((((! multithreaded || a$read_delayed == (_Bool)0) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! 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 || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-03 19:17:56,263 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:17:56,264 INFO L106 edCorrectnessWitness]: ghost_update [L874-L874] multithreaded = 1; [2024-06-03 19:17:56,300 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:17:56,603 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:17:56,611 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 19:17:56,711 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:17:56,744 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:17:56,745 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:17:56 WrapperNode [2024-06-03 19:17:56,745 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:17:56,746 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:17:56,746 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:17:56,746 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:17:56,751 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 07:17:56" (1/1) ... [2024-06-03 19:17:56,766 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 07:17:56" (1/1) ... [2024-06-03 19:17:56,796 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 141 [2024-06-03 19:17:56,797 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:17:56,797 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:17:56,797 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:17:56,797 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:17:56,806 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 07:17:56" (1/1) ... [2024-06-03 19:17:56,806 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 07:17:56" (1/1) ... [2024-06-03 19:17:56,809 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 07:17:56" (1/1) ... [2024-06-03 19:17:56,830 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 19:17:56,838 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 07:17:56" (1/1) ... [2024-06-03 19:17:56,838 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 07:17:56" (1/1) ... [2024-06-03 19:17:56,846 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 07:17:56" (1/1) ... [2024-06-03 19:17:56,861 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 07:17:56" (1/1) ... [2024-06-03 19:17:56,863 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 07:17:56" (1/1) ... [2024-06-03 19:17:56,864 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 07:17:56" (1/1) ... [2024-06-03 19:17:56,871 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:17:56,872 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:17:56,872 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:17:56,872 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:17:56,873 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 07:17:56" (1/1) ... [2024-06-03 19:17:56,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:17:56,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:17:56,901 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 19:17:56,924 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 19:17:56,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:17:56,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:17:56,933 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:17:56,933 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:17:56,933 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:17:56,933 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:17:56,933 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:17:56,933 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:17:56,933 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-03 19:17:56,934 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-03 19:17:56,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:17:56,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:17:56,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:17:56,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:17:56,936 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 19:17:57,069 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:17:57,071 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:17:57,467 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:17:57,468 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:17:57,624 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:17:57,624 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:17:57,624 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:17:57 BoogieIcfgContainer [2024-06-03 19:17:57,624 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:17:57,625 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:17:57,626 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:17:57,628 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:17:57,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:17:55" (1/4) ... [2024-06-03 19:17:57,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f34d7cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:17:57, skipping insertion in model container [2024-06-03 19:17:57,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:17:56" (2/4) ... [2024-06-03 19:17:57,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f34d7cb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:17:57, skipping insertion in model container [2024-06-03 19:17:57,629 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 07:17:56" (3/4) ... [2024-06-03 19:17:57,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f34d7cb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:17:57, skipping insertion in model container [2024-06-03 19:17:57,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:17:57" (4/4) ... [2024-06-03 19:17:57,630 INFO L112 eAbstractionObserver]: Analyzing ICFG mix013.oepc.i [2024-06-03 19:17:57,644 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:17:57,644 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-03 19:17:57,644 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:17:57,690 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:17:57,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-03 19:17:57,750 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-03 19:17:57,751 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:17:57,753 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 97 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 19:17:57,753 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-03 19:17:57,758 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-03 19:17:57,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:17:57,769 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;@3e79022f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:17:57,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-03 19:17:57,773 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:17:57,773 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:17:57,774 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:17:57,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:57,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:17:57,774 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 19:17:57,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:57,779 INFO L85 PathProgramCache]: Analyzing trace with hash -326955100, now seen corresponding path program 1 times [2024-06-03 19:17:57,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:57,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016364665] [2024-06-03 19:17:57,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:57,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:58,995 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 19:17:58,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:58,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016364665] [2024-06-03 19:17:58,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016364665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:58,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:58,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:17:58,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758984918] [2024-06-03 19:17:58,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:59,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:17:59,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:59,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:17:59,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:17:59,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-03 19:17:59,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 19:17:59,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:59,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-03 19:17:59,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:00,420 INFO L124 PetriNetUnfolderBase]: 7892/11115 cut-off events. [2024-06-03 19:18:00,420 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2024-06-03 19:18:00,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22194 conditions, 11115 events. 7892/11115 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 62334 event pairs, 6010 based on Foata normal form. 1/10941 useless extension candidates. Maximal degree in co-relation 22178. Up to 10748 conditions per place. [2024-06-03 19:18:00,478 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 44 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-03 19:18:00,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 235 flow [2024-06-03 19:18:00,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:18:00,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:18:00,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-06-03 19:18:00,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6234567901234568 [2024-06-03 19:18:00,489 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 101 transitions. [2024-06-03 19:18:00,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 235 flow [2024-06-03 19:18:00,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 228 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 19:18:00,494 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-03 19:18:00,495 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 19:18:00,498 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-03 19:18:00,499 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-03 19:18:00,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 19:18:00,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:00,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:00,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:18:00,500 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 19:18:00,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:00,501 INFO L85 PathProgramCache]: Analyzing trace with hash -671197117, now seen corresponding path program 1 times [2024-06-03 19:18:00,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:00,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086653074] [2024-06-03 19:18:00,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:00,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:01,381 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 19:18:01,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:01,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086653074] [2024-06-03 19:18:01,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086653074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:01,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:01,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:18:01,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421547372] [2024-06-03 19:18:01,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:01,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:18:01,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:01,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:18:01,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:18:01,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-03 19:18:01,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 19:18:01,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:01,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-03 19:18:01,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:02,730 INFO L124 PetriNetUnfolderBase]: 7882/11123 cut-off events. [2024-06-03 19:18:02,730 INFO L125 PetriNetUnfolderBase]: For 2157/2157 co-relation queries the response was YES. [2024-06-03 19:18:02,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25163 conditions, 11123 events. 7882/11123 cut-off events. For 2157/2157 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 62447 event pairs, 5323 based on Foata normal form. 4/11112 useless extension candidates. Maximal degree in co-relation 25148. Up to 10713 conditions per place. [2024-06-03 19:18:02,788 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 54 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-03 19:18:02,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 327 flow [2024-06-03 19:18:02,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:18:02,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:18:02,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-03 19:18:02,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064814814814815 [2024-06-03 19:18:02,791 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 131 transitions. [2024-06-03 19:18:02,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 327 flow [2024-06-03 19:18:02,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:18:02,796 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-03 19:18:02,796 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 19:18:02,797 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-03 19:18:02,797 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-03 19:18:02,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 19:18:02,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:02,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:02,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:18:02,798 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 19:18:02,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:02,799 INFO L85 PathProgramCache]: Analyzing trace with hash -775291678, now seen corresponding path program 1 times [2024-06-03 19:18:02,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:02,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505938268] [2024-06-03 19:18:02,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:02,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:03,911 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 19:18:03,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:03,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505938268] [2024-06-03 19:18:03,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505938268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:03,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:03,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:18:03,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612598591] [2024-06-03 19:18:03,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:03,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:18:03,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:03,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:18:03,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:18:04,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:18:04,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 19:18:04,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:04,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:18:04,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:05,525 INFO L124 PetriNetUnfolderBase]: 9557/13418 cut-off events. [2024-06-03 19:18:05,525 INFO L125 PetriNetUnfolderBase]: For 7145/7145 co-relation queries the response was YES. [2024-06-03 19:18:05,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33659 conditions, 13418 events. 9557/13418 cut-off events. For 7145/7145 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 75652 event pairs, 5407 based on Foata normal form. 4/13403 useless extension candidates. Maximal degree in co-relation 33642. Up to 12912 conditions per place. [2024-06-03 19:18:05,603 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 75 selfloop transitions, 17 changer transitions 0/100 dead transitions. [2024-06-03 19:18:05,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 100 transitions, 514 flow [2024-06-03 19:18:05,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:18:05,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:18:05,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-03 19:18:05,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-03 19:18:05,605 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 6 states and 186 transitions. [2024-06-03 19:18:05,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 100 transitions, 514 flow [2024-06-03 19:18:05,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 100 transitions, 486 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-03 19:18:05,609 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 260 flow [2024-06-03 19:18:05,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-06-03 19:18:05,610 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2024-06-03 19:18:05,610 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 260 flow [2024-06-03 19:18:05,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 19:18:05,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:05,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:05,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:18:05,611 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:18:05,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:05,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1735763174, now seen corresponding path program 1 times [2024-06-03 19:18:05,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:05,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107207730] [2024-06-03 19:18:05,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:05,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:06,769 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 19:18:06,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:06,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107207730] [2024-06-03 19:18:06,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107207730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:06,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:06,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:18:06,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437526913] [2024-06-03 19:18:06,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:06,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:18:06,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:06,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:18:06,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:18:06,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:18:06,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 260 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 19:18:06,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:06,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:18:06,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:08,386 INFO L124 PetriNetUnfolderBase]: 9541/13386 cut-off events. [2024-06-03 19:18:08,386 INFO L125 PetriNetUnfolderBase]: For 14418/14418 co-relation queries the response was YES. [2024-06-03 19:18:08,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37513 conditions, 13386 events. 9541/13386 cut-off events. For 14418/14418 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 75421 event pairs, 4602 based on Foata normal form. 8/13373 useless extension candidates. Maximal degree in co-relation 37494. Up to 12846 conditions per place. [2024-06-03 19:18:08,453 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 82 selfloop transitions, 20 changer transitions 0/110 dead transitions. [2024-06-03 19:18:08,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 110 transitions, 604 flow [2024-06-03 19:18:08,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:18:08,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:18:08,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-03 19:18:08,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582010582010583 [2024-06-03 19:18:08,456 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 260 flow. Second operand 7 states and 211 transitions. [2024-06-03 19:18:08,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 110 transitions, 604 flow [2024-06-03 19:18:08,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 110 transitions, 565 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-03 19:18:08,462 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 293 flow [2024-06-03 19:18:08,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=293, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2024-06-03 19:18:08,464 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2024-06-03 19:18:08,464 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 293 flow [2024-06-03 19:18:08,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 19:18:08,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:08,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:08,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:18:08,465 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 19:18:08,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:08,465 INFO L85 PathProgramCache]: Analyzing trace with hash 961408705, now seen corresponding path program 1 times [2024-06-03 19:18:08,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:08,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429353037] [2024-06-03 19:18:08,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:08,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:09,236 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 19:18:09,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:09,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429353037] [2024-06-03 19:18:09,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429353037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:09,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:09,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:18:09,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509515677] [2024-06-03 19:18:09,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:09,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:18:09,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:09,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:18:09,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:18:09,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:18:09,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:09,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:09,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:18:09,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:10,920 INFO L124 PetriNetUnfolderBase]: 11584/16172 cut-off events. [2024-06-03 19:18:10,920 INFO L125 PetriNetUnfolderBase]: For 26114/26114 co-relation queries the response was YES. [2024-06-03 19:18:10,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48059 conditions, 16172 events. 11584/16172 cut-off events. For 26114/26114 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 90005 event pairs, 6342 based on Foata normal form. 3/16172 useless extension candidates. Maximal degree in co-relation 48039. Up to 15660 conditions per place. [2024-06-03 19:18:11,037 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 66 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2024-06-03 19:18:11,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 83 transitions, 515 flow [2024-06-03 19:18:11,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:18:11,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:18:11,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-03 19:18:11,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-03 19:18:11,041 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 293 flow. Second operand 5 states and 129 transitions. [2024-06-03 19:18:11,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 83 transitions, 515 flow [2024-06-03 19:18:11,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 461 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 19:18:11,050 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 304 flow [2024-06-03 19:18:11,050 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=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-03 19:18:11,056 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2024-06-03 19:18:11,057 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 304 flow [2024-06-03 19:18:11,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:11,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:11,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:11,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:18:11,057 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 19:18:11,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:11,058 INFO L85 PathProgramCache]: Analyzing trace with hash -261100217, now seen corresponding path program 1 times [2024-06-03 19:18:11,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:11,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926102869] [2024-06-03 19:18:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:11,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:11,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:11,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926102869] [2024-06-03 19:18:11,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926102869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:11,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:11,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:18:11,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70997070] [2024-06-03 19:18:11,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:11,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:18:11,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:11,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:18:11,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:18:12,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:18:12,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 304 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:12,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:12,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:18:12,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:14,200 INFO L124 PetriNetUnfolderBase]: 11566/16147 cut-off events. [2024-06-03 19:18:14,201 INFO L125 PetriNetUnfolderBase]: For 37275/37275 co-relation queries the response was YES. [2024-06-03 19:18:14,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51671 conditions, 16147 events. 11566/16147 cut-off events. For 37275/37275 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 89893 event pairs, 6091 based on Foata normal form. 6/16150 useless extension candidates. Maximal degree in co-relation 51649. Up to 15606 conditions per place. [2024-06-03 19:18:14,317 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 74 selfloop transitions, 14 changer transitions 0/95 dead transitions. [2024-06-03 19:18:14,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 576 flow [2024-06-03 19:18:14,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:18:14,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:18:14,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-03 19:18:14,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2024-06-03 19:18:14,319 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 304 flow. Second operand 6 states and 154 transitions. [2024-06-03 19:18:14,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 576 flow [2024-06-03 19:18:14,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 95 transitions, 543 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-03 19:18:14,327 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 350 flow [2024-06-03 19:18:14,327 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=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=350, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2024-06-03 19:18:14,328 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 13 predicate places. [2024-06-03 19:18:14,328 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 350 flow [2024-06-03 19:18:14,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:14,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:14,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:14,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:18:14,329 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 19:18:14,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:14,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1499061488, now seen corresponding path program 1 times [2024-06-03 19:18:14,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:14,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531533870] [2024-06-03 19:18:14,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:14,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:15,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:15,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:15,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531533870] [2024-06-03 19:18:15,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531533870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:15,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:15,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:18:15,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724553592] [2024-06-03 19:18:15,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:15,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:18:15,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:15,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:18:15,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:18:15,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:18:15,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 350 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:15,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:15,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:18:15,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:16,860 INFO L124 PetriNetUnfolderBase]: 11588/16238 cut-off events. [2024-06-03 19:18:16,860 INFO L125 PetriNetUnfolderBase]: For 49772/49782 co-relation queries the response was YES. [2024-06-03 19:18:16,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55727 conditions, 16238 events. 11588/16238 cut-off events. For 49772/49782 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 90826 event pairs, 6077 based on Foata normal form. 11/16245 useless extension candidates. Maximal degree in co-relation 55704. Up to 15612 conditions per place. [2024-06-03 19:18:16,982 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 80 selfloop transitions, 21 changer transitions 0/108 dead transitions. [2024-06-03 19:18:16,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 108 transitions, 736 flow [2024-06-03 19:18:16,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:18:16,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:18:16,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-03 19:18:16,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49691358024691357 [2024-06-03 19:18:16,984 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 350 flow. Second operand 6 states and 161 transitions. [2024-06-03 19:18:16,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 108 transitions, 736 flow [2024-06-03 19:18:16,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 108 transitions, 689 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 19:18:16,994 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 436 flow [2024-06-03 19:18:16,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=436, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2024-06-03 19:18:16,995 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2024-06-03 19:18:16,995 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 436 flow [2024-06-03 19:18:16,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:16,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:16,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:16,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:18:16,996 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 19:18:16,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:16,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1040102530, now seen corresponding path program 2 times [2024-06-03 19:18:16,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:16,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674440018] [2024-06-03 19:18:16,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:16,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:17,893 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 19:18:17,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:17,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674440018] [2024-06-03 19:18:17,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674440018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:17,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:17,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:18:17,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576991967] [2024-06-03 19:18:17,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:17,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:18:17,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:17,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:18:17,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:18:18,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:18:18,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 436 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:18,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:18,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:18:18,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:19,542 INFO L124 PetriNetUnfolderBase]: 11579/16224 cut-off events. [2024-06-03 19:18:19,542 INFO L125 PetriNetUnfolderBase]: For 65160/65160 co-relation queries the response was YES. [2024-06-03 19:18:19,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59437 conditions, 16224 events. 11579/16224 cut-off events. For 65160/65160 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 90682 event pairs, 6070 based on Foata normal form. 3/16224 useless extension candidates. Maximal degree in co-relation 59413. Up to 15639 conditions per place. [2024-06-03 19:18:19,645 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 81 selfloop transitions, 14 changer transitions 0/102 dead transitions. [2024-06-03 19:18:19,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 102 transitions, 688 flow [2024-06-03 19:18:19,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:18:19,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:18:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-03 19:18:19,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-03 19:18:19,646 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 436 flow. Second operand 6 states and 153 transitions. [2024-06-03 19:18:19,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 102 transitions, 688 flow [2024-06-03 19:18:19,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 102 transitions, 626 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-03 19:18:19,673 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 413 flow [2024-06-03 19:18:19,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=413, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2024-06-03 19:18:19,673 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 19 predicate places. [2024-06-03 19:18:19,673 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 413 flow [2024-06-03 19:18:19,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:19,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:19,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:19,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:18:19,674 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 19:18:19,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:19,675 INFO L85 PathProgramCache]: Analyzing trace with hash -773853284, now seen corresponding path program 1 times [2024-06-03 19:18:19,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:19,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31514308] [2024-06-03 19:18:19,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:19,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:20,790 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 19:18:20,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:20,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31514308] [2024-06-03 19:18:20,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31514308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:20,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:20,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:18:20,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509211143] [2024-06-03 19:18:20,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:20,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:18:20,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:20,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:18:20,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:18:20,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:18:20,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 413 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:20,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:20,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:18:20,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:22,660 INFO L124 PetriNetUnfolderBase]: 11601/16257 cut-off events. [2024-06-03 19:18:22,660 INFO L125 PetriNetUnfolderBase]: For 72970/72970 co-relation queries the response was YES. [2024-06-03 19:18:22,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60177 conditions, 16257 events. 11601/16257 cut-off events. For 72970/72970 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 90768 event pairs, 5940 based on Foata normal form. 3/16257 useless extension candidates. Maximal degree in co-relation 60151. Up to 15642 conditions per place. [2024-06-03 19:18:22,771 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 94 selfloop transitions, 18 changer transitions 0/119 dead transitions. [2024-06-03 19:18:22,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 119 transitions, 775 flow [2024-06-03 19:18:22,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:18:22,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:18:22,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-03 19:18:22,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-03 19:18:22,773 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 413 flow. Second operand 7 states and 183 transitions. [2024-06-03 19:18:22,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 119 transitions, 775 flow [2024-06-03 19:18:22,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 119 transitions, 731 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 19:18:22,793 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 466 flow [2024-06-03 19:18:22,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=466, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-06-03 19:18:22,794 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 20 predicate places. [2024-06-03 19:18:22,794 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 466 flow [2024-06-03 19:18:22,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:22,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:22,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:22,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:18:22,795 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 19:18:22,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:22,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1986550130, now seen corresponding path program 2 times [2024-06-03 19:18:22,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:22,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580693657] [2024-06-03 19:18:22,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:22,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:23,792 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 19:18:23,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:23,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580693657] [2024-06-03 19:18:23,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580693657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:23,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:23,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:18:23,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981275718] [2024-06-03 19:18:23,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:23,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:18:23,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:23,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:18:23,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:18:23,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:18:23,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 466 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:23,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:23,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:18:23,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:25,464 INFO L124 PetriNetUnfolderBase]: 11623/16289 cut-off events. [2024-06-03 19:18:25,464 INFO L125 PetriNetUnfolderBase]: For 91615/91625 co-relation queries the response was YES. [2024-06-03 19:18:25,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64172 conditions, 16289 events. 11623/16289 cut-off events. For 91615/91625 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 91087 event pairs, 5947 based on Foata normal form. 11/16296 useless extension candidates. Maximal degree in co-relation 64146. Up to 15594 conditions per place. [2024-06-03 19:18:25,565 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 85 selfloop transitions, 35 changer transitions 0/127 dead transitions. [2024-06-03 19:18:25,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 127 transitions, 954 flow [2024-06-03 19:18:25,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:18:25,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:18:25,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-03 19:18:25,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947089947089947 [2024-06-03 19:18:25,567 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 466 flow. Second operand 7 states and 187 transitions. [2024-06-03 19:18:25,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 127 transitions, 954 flow [2024-06-03 19:18:25,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 127 transitions, 889 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 19:18:25,596 INFO L231 Difference]: Finished difference. Result has 79 places, 90 transitions, 590 flow [2024-06-03 19:18:25,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=590, PETRI_PLACES=79, PETRI_TRANSITIONS=90} [2024-06-03 19:18:25,596 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 22 predicate places. [2024-06-03 19:18:25,596 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 90 transitions, 590 flow [2024-06-03 19:18:25,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:25,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:25,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:25,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:18:25,597 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:18:25,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:25,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1986549944, now seen corresponding path program 1 times [2024-06-03 19:18:25,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:25,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059246724] [2024-06-03 19:18:25,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:25,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:26,551 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 19:18:26,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:26,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059246724] [2024-06-03 19:18:26,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059246724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:26,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:26,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:18:26,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487726437] [2024-06-03 19:18:26,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:26,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:18:26,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:26,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:18:26,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:18:26,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:18:26,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 90 transitions, 590 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:26,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:26,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:18:26,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:28,256 INFO L124 PetriNetUnfolderBase]: 11698/16348 cut-off events. [2024-06-03 19:18:28,256 INFO L125 PetriNetUnfolderBase]: For 116742/116748 co-relation queries the response was YES. [2024-06-03 19:18:28,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68494 conditions, 16348 events. 11698/16348 cut-off events. For 116742/116748 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 91325 event pairs, 5606 based on Foata normal form. 7/16350 useless extension candidates. Maximal degree in co-relation 68467. Up to 15673 conditions per place. [2024-06-03 19:18:28,356 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 103 selfloop transitions, 31 changer transitions 0/141 dead transitions. [2024-06-03 19:18:28,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 141 transitions, 1126 flow [2024-06-03 19:18:28,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:18:28,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:18:28,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-03 19:18:28,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 19:18:28,357 INFO L175 Difference]: Start difference. First operand has 79 places, 90 transitions, 590 flow. Second operand 7 states and 189 transitions. [2024-06-03 19:18:28,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 141 transitions, 1126 flow [2024-06-03 19:18:28,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 141 transitions, 1064 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-03 19:18:28,394 INFO L231 Difference]: Finished difference. Result has 84 places, 102 transitions, 738 flow [2024-06-03 19:18:28,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=738, PETRI_PLACES=84, PETRI_TRANSITIONS=102} [2024-06-03 19:18:28,394 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 27 predicate places. [2024-06-03 19:18:28,394 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 102 transitions, 738 flow [2024-06-03 19:18:28,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:28,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:28,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:28,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:18:28,395 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 19:18:28,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:28,395 INFO L85 PathProgramCache]: Analyzing trace with hash -2116558938, now seen corresponding path program 2 times [2024-06-03 19:18:28,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:28,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583790762] [2024-06-03 19:18:28,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:28,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:28,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:29,300 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 19:18:29,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:29,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583790762] [2024-06-03 19:18:29,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583790762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:29,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:29,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:18:29,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462794508] [2024-06-03 19:18:29,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:29,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:18:29,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:29,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:18:29,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:18:29,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:18:29,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 102 transitions, 738 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:29,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:29,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:18:29,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:31,205 INFO L124 PetriNetUnfolderBase]: 11742/16409 cut-off events. [2024-06-03 19:18:31,205 INFO L125 PetriNetUnfolderBase]: For 141414/141414 co-relation queries the response was YES. [2024-06-03 19:18:31,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73516 conditions, 16409 events. 11742/16409 cut-off events. For 141414/141414 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 91621 event pairs, 5695 based on Foata normal form. 6/16412 useless extension candidates. Maximal degree in co-relation 73486. Up to 15777 conditions per place. [2024-06-03 19:18:31,332 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 110 selfloop transitions, 25 changer transitions 0/142 dead transitions. [2024-06-03 19:18:31,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 142 transitions, 1224 flow [2024-06-03 19:18:31,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:18:31,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:18:31,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-03 19:18:31,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-03 19:18:31,334 INFO L175 Difference]: Start difference. First operand has 84 places, 102 transitions, 738 flow. Second operand 7 states and 184 transitions. [2024-06-03 19:18:31,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 142 transitions, 1224 flow [2024-06-03 19:18:31,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 142 transitions, 1177 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-03 19:18:31,381 INFO L231 Difference]: Finished difference. Result has 89 places, 106 transitions, 808 flow [2024-06-03 19:18:31,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=808, PETRI_PLACES=89, PETRI_TRANSITIONS=106} [2024-06-03 19:18:31,383 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 32 predicate places. [2024-06-03 19:18:31,383 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 106 transitions, 808 flow [2024-06-03 19:18:31,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:31,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:31,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:31,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:18:31,384 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 19:18:31,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:31,384 INFO L85 PathProgramCache]: Analyzing trace with hash -769091684, now seen corresponding path program 3 times [2024-06-03 19:18:31,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:31,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131180298] [2024-06-03 19:18:31,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:31,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:32,282 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 19:18:32,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:32,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131180298] [2024-06-03 19:18:32,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131180298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:32,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:32,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:18:32,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510126455] [2024-06-03 19:18:32,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:32,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:18:32,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:32,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:18:32,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:18:32,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:18:32,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 106 transitions, 808 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:32,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:32,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:18:32,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:34,202 INFO L124 PetriNetUnfolderBase]: 11733/16397 cut-off events. [2024-06-03 19:18:34,202 INFO L125 PetriNetUnfolderBase]: For 155679/155679 co-relation queries the response was YES. [2024-06-03 19:18:34,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74738 conditions, 16397 events. 11733/16397 cut-off events. For 155679/155679 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 91613 event pairs, 5695 based on Foata normal form. 3/16397 useless extension candidates. Maximal degree in co-relation 74705. Up to 15834 conditions per place. [2024-06-03 19:18:34,331 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 112 selfloop transitions, 18 changer transitions 0/137 dead transitions. [2024-06-03 19:18:34,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 137 transitions, 1148 flow [2024-06-03 19:18:34,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:18:34,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:18:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-03 19:18:34,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-03 19:18:34,333 INFO L175 Difference]: Start difference. First operand has 89 places, 106 transitions, 808 flow. Second operand 7 states and 177 transitions. [2024-06-03 19:18:34,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 137 transitions, 1148 flow [2024-06-03 19:18:34,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 137 transitions, 1022 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-03 19:18:34,395 INFO L231 Difference]: Finished difference. Result has 91 places, 106 transitions, 729 flow [2024-06-03 19:18:34,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=729, PETRI_PLACES=91, PETRI_TRANSITIONS=106} [2024-06-03 19:18:34,395 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 34 predicate places. [2024-06-03 19:18:34,395 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 106 transitions, 729 flow [2024-06-03 19:18:34,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:34,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:34,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:34,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:18:34,396 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 19:18:34,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:34,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1809411914, now seen corresponding path program 3 times [2024-06-03 19:18:34,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:34,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146727643] [2024-06-03 19:18:34,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:34,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:35,268 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 19:18:35,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:35,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146727643] [2024-06-03 19:18:35,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146727643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:35,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:35,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:18:35,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168079475] [2024-06-03 19:18:35,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:35,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:18:35,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:35,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:18:35,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:18:35,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:18:35,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 106 transitions, 729 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:35,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:35,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:18:35,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:37,153 INFO L124 PetriNetUnfolderBase]: 11715/16373 cut-off events. [2024-06-03 19:18:37,153 INFO L125 PetriNetUnfolderBase]: For 169337/169337 co-relation queries the response was YES. [2024-06-03 19:18:37,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75526 conditions, 16373 events. 11715/16373 cut-off events. For 169337/169337 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 91473 event pairs, 5692 based on Foata normal form. 6/16376 useless extension candidates. Maximal degree in co-relation 75493. Up to 15795 conditions per place. [2024-06-03 19:18:37,267 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 113 selfloop transitions, 18 changer transitions 0/138 dead transitions. [2024-06-03 19:18:37,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 138 transitions, 1075 flow [2024-06-03 19:18:37,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:18:37,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:18:37,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-03 19:18:37,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-03 19:18:37,268 INFO L175 Difference]: Start difference. First operand has 91 places, 106 transitions, 729 flow. Second operand 7 states and 178 transitions. [2024-06-03 19:18:37,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 138 transitions, 1075 flow [2024-06-03 19:18:37,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 138 transitions, 986 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-03 19:18:37,330 INFO L231 Difference]: Finished difference. Result has 92 places, 106 transitions, 687 flow [2024-06-03 19:18:37,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=687, PETRI_PLACES=92, PETRI_TRANSITIONS=106} [2024-06-03 19:18:37,331 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 35 predicate places. [2024-06-03 19:18:37,331 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 106 transitions, 687 flow [2024-06-03 19:18:37,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:37,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:37,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:37,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:18:37,331 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 19:18:37,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:37,332 INFO L85 PathProgramCache]: Analyzing trace with hash 2047275388, now seen corresponding path program 1 times [2024-06-03 19:18:37,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:37,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169902070] [2024-06-03 19:18:37,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:37,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:38,035 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 19:18:38,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:38,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169902070] [2024-06-03 19:18:38,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169902070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:38,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:38,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:18:38,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245428579] [2024-06-03 19:18:38,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:38,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:18:38,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:38,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:18:38,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:18:38,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:18:38,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 106 transitions, 687 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:38,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:38,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:18:38,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:40,071 INFO L124 PetriNetUnfolderBase]: 12587/18284 cut-off events. [2024-06-03 19:18:40,071 INFO L125 PetriNetUnfolderBase]: For 203200/203200 co-relation queries the response was YES. [2024-06-03 19:18:40,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82615 conditions, 18284 events. 12587/18284 cut-off events. For 203200/203200 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 109222 event pairs, 6688 based on Foata normal form. 4/18285 useless extension candidates. Maximal degree in co-relation 82581. Up to 16950 conditions per place. [2024-06-03 19:18:40,207 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 95 selfloop transitions, 10 changer transitions 0/125 dead transitions. [2024-06-03 19:18:40,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 125 transitions, 977 flow [2024-06-03 19:18:40,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:18:40,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:18:40,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-03 19:18:40,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-03 19:18:40,209 INFO L175 Difference]: Start difference. First operand has 92 places, 106 transitions, 687 flow. Second operand 5 states and 130 transitions. [2024-06-03 19:18:40,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 125 transitions, 977 flow [2024-06-03 19:18:40,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 125 transitions, 923 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 19:18:40,298 INFO L231 Difference]: Finished difference. Result has 91 places, 110 transitions, 712 flow [2024-06-03 19:18:40,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=712, PETRI_PLACES=91, PETRI_TRANSITIONS=110} [2024-06-03 19:18:40,299 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 34 predicate places. [2024-06-03 19:18:40,299 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 110 transitions, 712 flow [2024-06-03 19:18:40,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:40,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:40,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:40,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:18:40,300 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 19:18:40,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:40,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1780262607, now seen corresponding path program 1 times [2024-06-03 19:18:40,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:40,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670669775] [2024-06-03 19:18:40,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:40,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:41,620 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 19:18:41,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:41,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670669775] [2024-06-03 19:18:41,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670669775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:41,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:41,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:18:41,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743091156] [2024-06-03 19:18:41,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:41,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:18:41,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:41,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:18:41,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:18:41,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:18:41,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 110 transitions, 712 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:41,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:41,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:18:41,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:43,857 INFO L124 PetriNetUnfolderBase]: 11754/16700 cut-off events. [2024-06-03 19:18:43,857 INFO L125 PetriNetUnfolderBase]: For 202858/202858 co-relation queries the response was YES. [2024-06-03 19:18:43,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80960 conditions, 16700 events. 11754/16700 cut-off events. For 202858/202858 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 95193 event pairs, 5550 based on Foata normal form. 3/16700 useless extension candidates. Maximal degree in co-relation 80925. Up to 15798 conditions per place. [2024-06-03 19:18:43,983 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 138 selfloop transitions, 30 changer transitions 0/175 dead transitions. [2024-06-03 19:18:43,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 175 transitions, 1402 flow [2024-06-03 19:18:43,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:18:43,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:18:43,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-03 19:18:43,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897119341563786 [2024-06-03 19:18:43,985 INFO L175 Difference]: Start difference. First operand has 91 places, 110 transitions, 712 flow. Second operand 9 states and 238 transitions. [2024-06-03 19:18:43,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 175 transitions, 1402 flow [2024-06-03 19:18:44,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 175 transitions, 1353 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-03 19:18:44,063 INFO L231 Difference]: Finished difference. Result has 97 places, 118 transitions, 862 flow [2024-06-03 19:18:44,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=862, PETRI_PLACES=97, PETRI_TRANSITIONS=118} [2024-06-03 19:18:44,064 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 40 predicate places. [2024-06-03 19:18:44,064 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 118 transitions, 862 flow [2024-06-03 19:18:44,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:44,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:44,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:44,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:18:44,065 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 19:18:44,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:44,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1780352972, now seen corresponding path program 1 times [2024-06-03 19:18:44,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:44,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797952875] [2024-06-03 19:18:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:44,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:45,092 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 19:18:45,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:45,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797952875] [2024-06-03 19:18:45,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797952875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:45,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:45,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:18:45,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127189043] [2024-06-03 19:18:45,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:45,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:18:45,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:45,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:18:45,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:18:45,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:18:45,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 118 transitions, 862 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:45,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:45,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:18:45,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:47,189 INFO L124 PetriNetUnfolderBase]: 11798/16707 cut-off events. [2024-06-03 19:18:47,189 INFO L125 PetriNetUnfolderBase]: For 238063/238063 co-relation queries the response was YES. [2024-06-03 19:18:47,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85100 conditions, 16707 events. 11798/16707 cut-off events. For 238063/238063 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 94618 event pairs, 5466 based on Foata normal form. 6/16710 useless extension candidates. Maximal degree in co-relation 85064. Up to 15882 conditions per place. [2024-06-03 19:18:47,319 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 138 selfloop transitions, 22 changer transitions 0/167 dead transitions. [2024-06-03 19:18:47,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 167 transitions, 1364 flow [2024-06-03 19:18:47,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:18:47,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:18:47,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-03 19:18:47,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-03 19:18:47,321 INFO L175 Difference]: Start difference. First operand has 97 places, 118 transitions, 862 flow. Second operand 8 states and 208 transitions. [2024-06-03 19:18:47,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 167 transitions, 1364 flow [2024-06-03 19:18:47,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 167 transitions, 1274 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-03 19:18:47,415 INFO L231 Difference]: Finished difference. Result has 100 places, 122 transitions, 899 flow [2024-06-03 19:18:47,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=899, PETRI_PLACES=100, PETRI_TRANSITIONS=122} [2024-06-03 19:18:47,415 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 43 predicate places. [2024-06-03 19:18:47,416 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 122 transitions, 899 flow [2024-06-03 19:18:47,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:47,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:47,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:47,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:18:47,416 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 19:18:47,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:47,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1457230111, now seen corresponding path program 2 times [2024-06-03 19:18:47,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:47,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973291972] [2024-06-03 19:18:47,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:47,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:48,632 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 19:18:48,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:48,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973291972] [2024-06-03 19:18:48,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973291972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:48,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:48,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:18:48,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004576583] [2024-06-03 19:18:48,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:48,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:18:48,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:48,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:18:48,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:18:48,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:18:48,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 122 transitions, 899 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:48,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:48,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:18:48,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:50,820 INFO L124 PetriNetUnfolderBase]: 11789/16702 cut-off events. [2024-06-03 19:18:50,820 INFO L125 PetriNetUnfolderBase]: For 268108/268108 co-relation queries the response was YES. [2024-06-03 19:18:50,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88778 conditions, 16702 events. 11789/16702 cut-off events. For 268108/268108 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 94810 event pairs, 5473 based on Foata normal form. 3/16700 useless extension candidates. Maximal degree in co-relation 88740. Up to 15885 conditions per place. [2024-06-03 19:18:50,972 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 137 selfloop transitions, 22 changer transitions 0/166 dead transitions. [2024-06-03 19:18:50,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 166 transitions, 1331 flow [2024-06-03 19:18:50,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:18:50,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:18:50,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-03 19:18:50,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-03 19:18:50,985 INFO L175 Difference]: Start difference. First operand has 100 places, 122 transitions, 899 flow. Second operand 8 states and 207 transitions. [2024-06-03 19:18:50,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 166 transitions, 1331 flow [2024-06-03 19:18:51,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 166 transitions, 1206 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-03 19:18:51,100 INFO L231 Difference]: Finished difference. Result has 102 places, 122 transitions, 829 flow [2024-06-03 19:18:51,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=829, PETRI_PLACES=102, PETRI_TRANSITIONS=122} [2024-06-03 19:18:51,100 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 45 predicate places. [2024-06-03 19:18:51,101 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 122 transitions, 829 flow [2024-06-03 19:18:51,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:51,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:51,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:51,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:18:51,101 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 19:18:51,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:51,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1453511041, now seen corresponding path program 3 times [2024-06-03 19:18:51,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:51,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306435254] [2024-06-03 19:18:51,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:51,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:52,415 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 19:18:52,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:52,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306435254] [2024-06-03 19:18:52,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306435254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:52,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:52,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:18:52,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723071320] [2024-06-03 19:18:52,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:52,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:18:52,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:52,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:18:52,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:18:52,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:18:52,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 122 transitions, 829 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:52,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:52,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:18:52,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:54,473 INFO L124 PetriNetUnfolderBase]: 11811/16734 cut-off events. [2024-06-03 19:18:54,473 INFO L125 PetriNetUnfolderBase]: For 289883/289888 co-relation queries the response was YES. [2024-06-03 19:18:54,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89977 conditions, 16734 events. 11811/16734 cut-off events. For 289883/289888 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 95058 event pairs, 5480 based on Foata normal form. 7/16735 useless extension candidates. Maximal degree in co-relation 89938. Up to 15840 conditions per place. [2024-06-03 19:18:54,633 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 121 selfloop transitions, 39 changer transitions 0/167 dead transitions. [2024-06-03 19:18:54,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 167 transitions, 1327 flow [2024-06-03 19:18:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:18:54,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:18:54,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-03 19:18:54,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-03 19:18:54,634 INFO L175 Difference]: Start difference. First operand has 102 places, 122 transitions, 829 flow. Second operand 8 states and 208 transitions. [2024-06-03 19:18:54,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 167 transitions, 1327 flow [2024-06-03 19:18:54,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 167 transitions, 1272 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 19:18:54,756 INFO L231 Difference]: Finished difference. Result has 103 places, 126 transitions, 943 flow [2024-06-03 19:18:54,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=943, PETRI_PLACES=103, PETRI_TRANSITIONS=126} [2024-06-03 19:18:54,756 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 46 predicate places. [2024-06-03 19:18:54,756 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 126 transitions, 943 flow [2024-06-03 19:18:54,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:54,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:54,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:54,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:18:54,757 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 19:18:54,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:54,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1385745610, now seen corresponding path program 2 times [2024-06-03 19:18:54,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:54,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226976627] [2024-06-03 19:18:54,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:54,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:55,817 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 19:18:55,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:55,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226976627] [2024-06-03 19:18:55,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226976627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:55,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:55,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:18:55,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656406517] [2024-06-03 19:18:55,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:55,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:18:55,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:55,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:18:55,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:18:55,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:18:55,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 126 transitions, 943 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:55,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:55,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:18:55,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:57,906 INFO L124 PetriNetUnfolderBase]: 11948/16917 cut-off events. [2024-06-03 19:18:57,906 INFO L125 PetriNetUnfolderBase]: For 330825/330828 co-relation queries the response was YES. [2024-06-03 19:18:57,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95296 conditions, 16917 events. 11948/16917 cut-off events. For 330825/330828 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 95924 event pairs, 5292 based on Foata normal form. 6/16916 useless extension candidates. Maximal degree in co-relation 95256. Up to 15758 conditions per place. [2024-06-03 19:18:58,063 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 122 selfloop transitions, 60 changer transitions 0/189 dead transitions. [2024-06-03 19:18:58,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 189 transitions, 1893 flow [2024-06-03 19:18:58,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:18:58,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:18:58,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-03 19:18:58,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-03 19:18:58,065 INFO L175 Difference]: Start difference. First operand has 103 places, 126 transitions, 943 flow. Second operand 8 states and 222 transitions. [2024-06-03 19:18:58,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 189 transitions, 1893 flow [2024-06-03 19:18:58,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 189 transitions, 1756 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-03 19:18:58,230 INFO L231 Difference]: Finished difference. Result has 105 places, 138 transitions, 1173 flow [2024-06-03 19:18:58,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1173, PETRI_PLACES=105, PETRI_TRANSITIONS=138} [2024-06-03 19:18:58,230 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 48 predicate places. [2024-06-03 19:18:58,230 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 138 transitions, 1173 flow [2024-06-03 19:18:58,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:58,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:58,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:58,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:18:58,231 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 19:18:58,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:58,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1385740030, now seen corresponding path program 3 times [2024-06-03 19:18:58,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:58,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522592704] [2024-06-03 19:18:58,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:58,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:59,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:59,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522592704] [2024-06-03 19:18:59,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522592704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:59,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:59,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:18:59,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142662414] [2024-06-03 19:18:59,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:59,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:18:59,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:59,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:18:59,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:18:59,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:18:59,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 138 transitions, 1173 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:59,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:59,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:18:59,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:01,552 INFO L124 PetriNetUnfolderBase]: 11930/16893 cut-off events. [2024-06-03 19:19:01,552 INFO L125 PetriNetUnfolderBase]: For 369699/369702 co-relation queries the response was YES. [2024-06-03 19:19:01,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98913 conditions, 16893 events. 11930/16893 cut-off events. For 369699/369702 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 95730 event pairs, 5292 based on Foata normal form. 6/16892 useless extension candidates. Maximal degree in co-relation 98872. Up to 15743 conditions per place. [2024-06-03 19:19:01,665 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 117 selfloop transitions, 61 changer transitions 0/185 dead transitions. [2024-06-03 19:19:01,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 185 transitions, 1771 flow [2024-06-03 19:19:01,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:19:01,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:19:01,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-03 19:19:01,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023148148148148 [2024-06-03 19:19:01,666 INFO L175 Difference]: Start difference. First operand has 105 places, 138 transitions, 1173 flow. Second operand 8 states and 217 transitions. [2024-06-03 19:19:01,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 185 transitions, 1771 flow [2024-06-03 19:19:01,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 185 transitions, 1612 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-03 19:19:01,800 INFO L231 Difference]: Finished difference. Result has 110 places, 138 transitions, 1147 flow [2024-06-03 19:19:01,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1147, PETRI_PLACES=110, PETRI_TRANSITIONS=138} [2024-06-03 19:19:01,800 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 53 predicate places. [2024-06-03 19:19:01,800 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 138 transitions, 1147 flow [2024-06-03 19:19:01,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:01,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:01,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:01,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:19:01,801 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 19:19:01,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:01,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1181465174, now seen corresponding path program 4 times [2024-06-03 19:19:01,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:01,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980029878] [2024-06-03 19:19:01,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:01,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:02,732 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 19:19:02,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:02,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980029878] [2024-06-03 19:19:02,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980029878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:02,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:02,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:19:02,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164310539] [2024-06-03 19:19:02,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:02,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:19:02,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:02,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:19:02,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:19:02,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:19:02,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 138 transitions, 1147 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:02,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:02,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:19:02,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:05,162 INFO L124 PetriNetUnfolderBase]: 11974/16954 cut-off events. [2024-06-03 19:19:05,162 INFO L125 PetriNetUnfolderBase]: For 393776/393776 co-relation queries the response was YES. [2024-06-03 19:19:05,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100594 conditions, 16954 events. 11974/16954 cut-off events. For 393776/393776 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 95983 event pairs, 5492 based on Foata normal form. 6/16955 useless extension candidates. Maximal degree in co-relation 100551. Up to 16111 conditions per place. [2024-06-03 19:19:05,285 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 153 selfloop transitions, 22 changer transitions 0/182 dead transitions. [2024-06-03 19:19:05,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 182 transitions, 1695 flow [2024-06-03 19:19:05,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:19:05,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:19:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-03 19:19:05,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4699074074074074 [2024-06-03 19:19:05,286 INFO L175 Difference]: Start difference. First operand has 110 places, 138 transitions, 1147 flow. Second operand 8 states and 203 transitions. [2024-06-03 19:19:05,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 182 transitions, 1695 flow [2024-06-03 19:19:05,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 182 transitions, 1554 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 19:19:05,397 INFO L231 Difference]: Finished difference. Result has 111 places, 142 transitions, 1161 flow [2024-06-03 19:19:05,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1161, PETRI_PLACES=111, PETRI_TRANSITIONS=142} [2024-06-03 19:19:05,397 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 54 predicate places. [2024-06-03 19:19:05,397 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 142 transitions, 1161 flow [2024-06-03 19:19:05,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:05,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:05,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:05,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:19:05,398 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 19:19:05,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:05,398 INFO L85 PathProgramCache]: Analyzing trace with hash -257395482, now seen corresponding path program 5 times [2024-06-03 19:19:05,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:05,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920911718] [2024-06-03 19:19:05,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:05,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:06,367 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 19:19:06,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:06,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920911718] [2024-06-03 19:19:06,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920911718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:06,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:06,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:19:06,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506940781] [2024-06-03 19:19:06,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:06,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:19:06,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:06,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:19:06,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:19:06,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:19:06,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 142 transitions, 1161 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:06,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:06,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:19:06,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:08,650 INFO L124 PetriNetUnfolderBase]: 12018/17022 cut-off events. [2024-06-03 19:19:08,650 INFO L125 PetriNetUnfolderBase]: For 420972/420972 co-relation queries the response was YES. [2024-06-03 19:19:08,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102082 conditions, 17022 events. 12018/17022 cut-off events. For 420972/420972 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 96479 event pairs, 5492 based on Foata normal form. 6/17023 useless extension candidates. Maximal degree in co-relation 102038. Up to 16034 conditions per place. [2024-06-03 19:19:08,820 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 144 selfloop transitions, 39 changer transitions 0/190 dead transitions. [2024-06-03 19:19:08,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 190 transitions, 1865 flow [2024-06-03 19:19:08,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:19:08,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:19:08,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-03 19:19:08,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48842592592592593 [2024-06-03 19:19:08,821 INFO L175 Difference]: Start difference. First operand has 111 places, 142 transitions, 1161 flow. Second operand 8 states and 211 transitions. [2024-06-03 19:19:08,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 190 transitions, 1865 flow [2024-06-03 19:19:08,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 190 transitions, 1758 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-03 19:19:08,986 INFO L231 Difference]: Finished difference. Result has 113 places, 146 transitions, 1235 flow [2024-06-03 19:19:08,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1054, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1235, PETRI_PLACES=113, PETRI_TRANSITIONS=146} [2024-06-03 19:19:08,987 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 56 predicate places. [2024-06-03 19:19:08,987 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 146 transitions, 1235 flow [2024-06-03 19:19:08,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:08,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:08,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:08,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:19:08,988 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 19:19:08,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:08,988 INFO L85 PathProgramCache]: Analyzing trace with hash -257401062, now seen corresponding path program 6 times [2024-06-03 19:19:08,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:08,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008760062] [2024-06-03 19:19:08,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:08,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:08,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:09,964 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 19:19:09,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:09,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008760062] [2024-06-03 19:19:09,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008760062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:09,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:09,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:19:09,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143300913] [2024-06-03 19:19:09,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:09,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:19:09,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:09,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:19:09,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:19:10,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:19:10,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 146 transitions, 1235 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:10,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:10,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:19:10,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:12,594 INFO L124 PetriNetUnfolderBase]: 12000/16998 cut-off events. [2024-06-03 19:19:12,594 INFO L125 PetriNetUnfolderBase]: For 445289/445289 co-relation queries the response was YES. [2024-06-03 19:19:12,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102920 conditions, 16998 events. 12000/16998 cut-off events. For 445289/445289 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 96227 event pairs, 5481 based on Foata normal form. 6/16999 useless extension candidates. Maximal degree in co-relation 102875. Up to 16019 conditions per place. [2024-06-03 19:19:12,754 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 140 selfloop transitions, 40 changer transitions 0/187 dead transitions. [2024-06-03 19:19:12,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 187 transitions, 1705 flow [2024-06-03 19:19:12,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:19:12,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:19:12,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-03 19:19:12,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-03 19:19:12,755 INFO L175 Difference]: Start difference. First operand has 113 places, 146 transitions, 1235 flow. Second operand 8 states and 207 transitions. [2024-06-03 19:19:12,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 187 transitions, 1705 flow [2024-06-03 19:19:12,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 187 transitions, 1463 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-03 19:19:12,962 INFO L231 Difference]: Finished difference. Result has 115 places, 146 transitions, 1084 flow [2024-06-03 19:19:12,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1084, PETRI_PLACES=115, PETRI_TRANSITIONS=146} [2024-06-03 19:19:12,963 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 58 predicate places. [2024-06-03 19:19:12,963 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 146 transitions, 1084 flow [2024-06-03 19:19:12,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:12,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:12,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:12,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:19:12,963 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 19:19:12,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:12,964 INFO L85 PathProgramCache]: Analyzing trace with hash -257401217, now seen corresponding path program 4 times [2024-06-03 19:19:12,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:12,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713830341] [2024-06-03 19:19:12,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:12,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:14,310 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 19:19:14,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:14,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713830341] [2024-06-03 19:19:14,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713830341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:14,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:14,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:19:14,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485573137] [2024-06-03 19:19:14,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:14,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:19:14,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:14,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:19:14,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:19:14,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:19:14,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 146 transitions, 1084 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:14,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:14,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:19:14,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:16,722 INFO L124 PetriNetUnfolderBase]: 11991/16986 cut-off events. [2024-06-03 19:19:16,722 INFO L125 PetriNetUnfolderBase]: For 467626/467626 co-relation queries the response was YES. [2024-06-03 19:19:16,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103466 conditions, 16986 events. 11991/16986 cut-off events. For 467626/467626 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 96131 event pairs, 5497 based on Foata normal form. 3/16984 useless extension candidates. Maximal degree in co-relation 103420. Up to 16173 conditions per place. [2024-06-03 19:19:16,861 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 159 selfloop transitions, 22 changer transitions 0/188 dead transitions. [2024-06-03 19:19:16,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 188 transitions, 1628 flow [2024-06-03 19:19:16,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:19:16,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:19:16,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-03 19:19:16,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652777777777778 [2024-06-03 19:19:16,862 INFO L175 Difference]: Start difference. First operand has 115 places, 146 transitions, 1084 flow. Second operand 8 states and 201 transitions. [2024-06-03 19:19:16,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 188 transitions, 1628 flow [2024-06-03 19:19:17,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 188 transitions, 1537 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 19:19:17,180 INFO L231 Difference]: Finished difference. Result has 116 places, 150 transitions, 1140 flow [2024-06-03 19:19:17,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1140, PETRI_PLACES=116, PETRI_TRANSITIONS=150} [2024-06-03 19:19:17,180 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 59 predicate places. [2024-06-03 19:19:17,180 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 150 transitions, 1140 flow [2024-06-03 19:19:17,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:17,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:17,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:17,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:19:17,181 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:19:17,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:17,181 INFO L85 PathProgramCache]: Analyzing trace with hash -249766785, now seen corresponding path program 1 times [2024-06-03 19:19:17,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:17,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144769793] [2024-06-03 19:19:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:17,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:18,629 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 19:19:18,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:18,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144769793] [2024-06-03 19:19:18,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144769793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:18,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:18,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:19:18,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327304546] [2024-06-03 19:19:18,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:18,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:19:18,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:18,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:19:18,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:19:18,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:19:18,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 150 transitions, 1140 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:18,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:18,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:19:18,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:21,947 INFO L124 PetriNetUnfolderBase]: 14155/19895 cut-off events. [2024-06-03 19:19:21,947 INFO L125 PetriNetUnfolderBase]: For 592324/592324 co-relation queries the response was YES. [2024-06-03 19:19:22,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122879 conditions, 19895 events. 14155/19895 cut-off events. For 592324/592324 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 111900 event pairs, 6522 based on Foata normal form. 6/19896 useless extension candidates. Maximal degree in co-relation 122832. Up to 19032 conditions per place. [2024-06-03 19:19:22,117 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 166 selfloop transitions, 24 changer transitions 0/196 dead transitions. [2024-06-03 19:19:22,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 196 transitions, 1722 flow [2024-06-03 19:19:22,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:19:22,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:19:22,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-03 19:19:22,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513888888888889 [2024-06-03 19:19:22,118 INFO L175 Difference]: Start difference. First operand has 116 places, 150 transitions, 1140 flow. Second operand 8 states and 195 transitions. [2024-06-03 19:19:22,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 196 transitions, 1722 flow [2024-06-03 19:19:22,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 196 transitions, 1607 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-03 19:19:22,352 INFO L231 Difference]: Finished difference. Result has 119 places, 157 transitions, 1198 flow [2024-06-03 19:19:22,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1198, PETRI_PLACES=119, PETRI_TRANSITIONS=157} [2024-06-03 19:19:22,352 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 62 predicate places. [2024-06-03 19:19:22,352 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 157 transitions, 1198 flow [2024-06-03 19:19:22,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:22,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:22,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:22,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:19:22,353 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 19:19:22,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:22,353 INFO L85 PathProgramCache]: Analyzing trace with hash -646493605, now seen corresponding path program 1 times [2024-06-03 19:19:22,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:22,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201772451] [2024-06-03 19:19:22,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:22,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:23,777 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 19:19:23,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:23,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201772451] [2024-06-03 19:19:23,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201772451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:23,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:23,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:19:23,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608886508] [2024-06-03 19:19:23,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:23,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:19:23,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:23,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:19:23,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:19:24,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:19:24,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 157 transitions, 1198 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 19:19:24,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:24,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:19:24,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:27,070 INFO L124 PetriNetUnfolderBase]: 13895/19577 cut-off events. [2024-06-03 19:19:27,070 INFO L125 PetriNetUnfolderBase]: For 646067/646067 co-relation queries the response was YES. [2024-06-03 19:19:27,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126192 conditions, 19577 events. 13895/19577 cut-off events. For 646067/646067 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 112202 event pairs, 5305 based on Foata normal form. 6/19576 useless extension candidates. Maximal degree in co-relation 126143. Up to 18553 conditions per place. [2024-06-03 19:19:27,382 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 183 selfloop transitions, 38 changer transitions 0/229 dead transitions. [2024-06-03 19:19:27,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 229 transitions, 2134 flow [2024-06-03 19:19:27,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:19:27,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:19:27,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 263 transitions. [2024-06-03 19:19:27,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48703703703703705 [2024-06-03 19:19:27,389 INFO L175 Difference]: Start difference. First operand has 119 places, 157 transitions, 1198 flow. Second operand 10 states and 263 transitions. [2024-06-03 19:19:27,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 229 transitions, 2134 flow [2024-06-03 19:19:27,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 229 transitions, 2022 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-03 19:19:27,695 INFO L231 Difference]: Finished difference. Result has 124 places, 163 transitions, 1350 flow [2024-06-03 19:19:27,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1350, PETRI_PLACES=124, PETRI_TRANSITIONS=163} [2024-06-03 19:19:27,696 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 67 predicate places. [2024-06-03 19:19:27,696 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 163 transitions, 1350 flow [2024-06-03 19:19:27,696 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 19:19:27,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:27,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:27,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:19:27,696 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:19:27,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:27,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1778944235, now seen corresponding path program 2 times [2024-06-03 19:19:27,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:27,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144003574] [2024-06-03 19:19:27,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:27,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:29,077 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 19:19:29,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:29,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144003574] [2024-06-03 19:19:29,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144003574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:29,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:29,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:19:29,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397822853] [2024-06-03 19:19:29,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:29,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:19:29,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:29,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:19:29,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:19:29,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:19:29,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 163 transitions, 1350 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 19:19:29,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:29,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:19:29,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:32,323 INFO L124 PetriNetUnfolderBase]: 13931/19629 cut-off events. [2024-06-03 19:19:32,323 INFO L125 PetriNetUnfolderBase]: For 707144/707144 co-relation queries the response was YES. [2024-06-03 19:19:32,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129986 conditions, 19629 events. 13931/19629 cut-off events. For 707144/707144 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 112773 event pairs, 5975 based on Foata normal form. 6/19628 useless extension candidates. Maximal degree in co-relation 129936. Up to 18702 conditions per place. [2024-06-03 19:19:32,488 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 187 selfloop transitions, 33 changer transitions 0/228 dead transitions. [2024-06-03 19:19:32,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 228 transitions, 2042 flow [2024-06-03 19:19:32,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:19:32,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:19:32,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-06-03 19:19:32,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47962962962962963 [2024-06-03 19:19:32,490 INFO L175 Difference]: Start difference. First operand has 124 places, 163 transitions, 1350 flow. Second operand 10 states and 259 transitions. [2024-06-03 19:19:32,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 228 transitions, 2042 flow [2024-06-03 19:19:32,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 228 transitions, 1875 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-03 19:19:32,803 INFO L231 Difference]: Finished difference. Result has 128 places, 166 transitions, 1357 flow [2024-06-03 19:19:32,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1357, PETRI_PLACES=128, PETRI_TRANSITIONS=166} [2024-06-03 19:19:32,803 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 71 predicate places. [2024-06-03 19:19:32,803 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 166 transitions, 1357 flow [2024-06-03 19:19:32,803 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 19:19:32,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:32,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:32,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:19:32,804 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:19:32,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:32,804 INFO L85 PathProgramCache]: Analyzing trace with hash -646433031, now seen corresponding path program 1 times [2024-06-03 19:19:32,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:32,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458564285] [2024-06-03 19:19:32,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:32,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:34,410 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 19:19:34,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:34,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458564285] [2024-06-03 19:19:34,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458564285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:34,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:34,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:19:34,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12263832] [2024-06-03 19:19:34,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:34,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:19:34,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:34,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:19:34,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:19:34,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:19:34,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 166 transitions, 1357 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 19:19:34,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:34,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:19:34,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:37,935 INFO L124 PetriNetUnfolderBase]: 13975/19629 cut-off events. [2024-06-03 19:19:37,935 INFO L125 PetriNetUnfolderBase]: For 753886/753886 co-relation queries the response was YES. [2024-06-03 19:19:38,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131460 conditions, 19629 events. 13975/19629 cut-off events. For 753886/753886 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 112374 event pairs, 5884 based on Foata normal form. 6/19630 useless extension candidates. Maximal degree in co-relation 131408. Up to 18708 conditions per place. [2024-06-03 19:19:38,106 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 172 selfloop transitions, 35 changer transitions 0/215 dead transitions. [2024-06-03 19:19:38,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 215 transitions, 1983 flow [2024-06-03 19:19:38,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:19:38,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:19:38,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-03 19:19:38,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48842592592592593 [2024-06-03 19:19:38,107 INFO L175 Difference]: Start difference. First operand has 128 places, 166 transitions, 1357 flow. Second operand 8 states and 211 transitions. [2024-06-03 19:19:38,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 215 transitions, 1983 flow [2024-06-03 19:19:38,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 215 transitions, 1867 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-03 19:19:38,507 INFO L231 Difference]: Finished difference. Result has 128 places, 170 transitions, 1429 flow [2024-06-03 19:19:38,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1429, PETRI_PLACES=128, PETRI_TRANSITIONS=170} [2024-06-03 19:19:38,508 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 71 predicate places. [2024-06-03 19:19:38,508 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 170 transitions, 1429 flow [2024-06-03 19:19:38,509 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 19:19:38,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:38,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:38,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:19:38,509 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:19:38,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:38,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2070507691, now seen corresponding path program 3 times [2024-06-03 19:19:38,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:38,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876394039] [2024-06-03 19:19:38,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:38,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat