./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 cde23df1 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-cde23df-m [2024-06-14 11:59:44,762 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:59:44,823 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:59:44,828 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:59:44,828 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:59:44,841 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:59:44,841 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:59:44,841 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:59:44,842 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:59:44,842 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:59:44,842 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:59:44,842 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:59:44,843 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:59:44,843 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:59:44,843 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:59:44,843 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:59:44,844 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:59:44,844 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:59:44,844 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:59:44,844 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:59:44,845 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:59:44,849 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:59:44,849 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:59:44,849 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:59:44,850 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:59:44,850 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:59:44,850 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:59:44,851 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:59:44,852 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:59:44,852 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:59:44,853 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:59:44,853 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:59:44,853 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:59:44,853 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:59:44,853 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:59:44,854 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:59:44,854 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:59:44,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:59:44,854 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:59:44,854 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:59:44,854 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:59:44,855 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:59:44,855 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:59:44,855 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:59:45,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:59:45,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:59:45,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:59:45,043 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:59:45,043 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:59:45,044 INFO L431 ainManager$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 [2024-06-14 11:59:45,251 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:59:45,251 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:59:45,251 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix013.oepc.i [2024-06-14 11:59:46,184 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:59:46,412 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:59:46,412 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix013.oepc.i [2024-06-14 11:59:46,424 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52782190e/cb876f03205b4fbf96f7556808376899/FLAG6d015e4cb [2024-06-14 11:59:46,454 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52782190e/cb876f03205b4fbf96f7556808376899 [2024-06-14 11:59:46,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:59:46,456 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:59:46,474 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:59:46,474 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:59:46,477 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:59:46,478 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:59:45" (1/2) ... [2024-06-14 11:59:46,478 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@173947dd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:59:46, skipping insertion in model container [2024-06-14 11:59:46,479 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:59:45" (1/2) ... [2024-06-14 11:59:46,479 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@26a8b6c5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:59:46, skipping insertion in model container [2024-06-14 11:59:46,480 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:59:46" (2/2) ... [2024-06-14 11:59:46,480 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@173947dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:59:46, skipping insertion in model container [2024-06-14 11:59:46,480 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:59:46" (2/2) ... [2024-06-14 11:59:46,480 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:59:46,580 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:59:46,581 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$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-14 11:59:46,581 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] ((((((((((((((((((((((((! multithreaded || a$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))) [2024-06-14 11:59:46,581 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$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-14 11:59:46,582 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] ((((((((((((((((((((((((! multithreaded || a$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))) [2024-06-14 11:59:46,582 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:59:46,582 INFO L106 edCorrectnessWitness]: ghost_update [L874-L874] multithreaded = 1; [2024-06-14 11:59:46,618 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:59:46,878 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:59:46,885 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:59:47,024 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:59:47,073 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:59:47,074 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:59:47 WrapperNode [2024-06-14 11:59:47,074 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:59:47,075 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:59:47,076 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:59:47,076 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:59:47,081 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:59:47" (1/1) ... [2024-06-14 11:59:47,112 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:59:47" (1/1) ... [2024-06-14 11:59:47,152 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 141 [2024-06-14 11:59:47,152 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:59:47,153 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:59:47,153 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:59:47,153 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:59:47,161 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:59:47" (1/1) ... [2024-06-14 11:59:47,161 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:59:47" (1/1) ... [2024-06-14 11:59:47,164 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:59:47" (1/1) ... [2024-06-14 11:59:47,179 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]. [2024-06-14 11:59:47,179 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:59:47" (1/1) ... [2024-06-14 11:59:47,179 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:59:47" (1/1) ... [2024-06-14 11:59:47,187 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:59:47" (1/1) ... [2024-06-14 11:59:47,188 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:59:47" (1/1) ... [2024-06-14 11:59:47,190 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:59:47" (1/1) ... [2024-06-14 11:59:47,191 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:59:47" (1/1) ... [2024-06-14 11:59:47,194 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:59:47,195 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:59:47,195 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:59:47,195 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:59:47,196 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:59:47" (1/1) ... [2024-06-14 11:59:47,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:59:47,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:59:47,225 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) [2024-06-14 11:59:47,227 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 [2024-06-14 11:59:47,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:59:47,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:59:47,251 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:59:47,251 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:59:47,251 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:59:47,251 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:59:47,251 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:59:47,251 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:59:47,251 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 11:59:47,252 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 11:59:47,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:59:47,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:59:47,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:59:47,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:59:47,253 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 11:59:47,353 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:59:47,355 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:59:47,681 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:59:47,682 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:59:47,797 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:59:47,797 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:59:47,797 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:59:47 BoogieIcfgContainer [2024-06-14 11:59:47,797 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:59:47,800 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:59:47,800 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:59:47,802 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:59:47,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:59:45" (1/4) ... [2024-06-14 11:59:47,803 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cdc1576 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:59:47, skipping insertion in model container [2024-06-14 11:59:47,803 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:59:46" (2/4) ... [2024-06-14 11:59:47,804 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cdc1576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:59:47, skipping insertion in model container [2024-06-14 11:59:47,804 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:59:47" (3/4) ... [2024-06-14 11:59:47,804 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cdc1576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:59:47, skipping insertion in model container [2024-06-14 11:59:47,804 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:59:47" (4/4) ... [2024-06-14 11:59:47,805 INFO L112 eAbstractionObserver]: Analyzing ICFG mix013.oepc.i [2024-06-14 11:59:47,818 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:59:47,818 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 11:59:47,819 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:59:47,870 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:59:47,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-14 11:59:47,927 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-14 11:59:47,927 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:59:47,929 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. [2024-06-14 11:59:47,929 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-14 11:59:47,932 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-14 11:59:47,943 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:59:47,947 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;@71d16389, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:59:47,947 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 11:59:47,950 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:59:47,950 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 11:59:47,951 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:59:47,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:47,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:59:47,952 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)] === [2024-06-14 11:59:47,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:47,955 INFO L85 PathProgramCache]: Analyzing trace with hash -326955100, now seen corresponding path program 1 times [2024-06-14 11:59:47,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:47,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719745069] [2024-06-14 11:59:47,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:47,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:48,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:48,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:48,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719745069] [2024-06-14 11:59:48,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719745069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:48,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:48,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:59:48,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656974495] [2024-06-14 11:59:48,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:48,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:59:48,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:48,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:59:48,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:59:49,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-14 11:59:49,011 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) [2024-06-14 11:59:49,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:49,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-14 11:59:49,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:50,374 INFO L124 PetriNetUnfolderBase]: 7892/11115 cut-off events. [2024-06-14 11:59:50,374 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2024-06-14 11:59:50,390 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. [2024-06-14 11:59:50,436 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 44 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-14 11:59:50,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 235 flow [2024-06-14 11:59:50,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:59:50,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:59:50,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-06-14 11:59:50,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6234567901234568 [2024-06-14 11:59:50,448 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 101 transitions. [2024-06-14 11:59:50,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 235 flow [2024-06-14 11:59:50,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 228 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 11:59:50,455 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-14 11:59:50,457 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} [2024-06-14 11:59:50,460 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-14 11:59:50,460 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-14 11:59:50,461 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) [2024-06-14 11:59:50,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:50,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:50,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:59:50,461 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)] === [2024-06-14 11:59:50,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:50,462 INFO L85 PathProgramCache]: Analyzing trace with hash -671197117, now seen corresponding path program 1 times [2024-06-14 11:59:50,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:50,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92590679] [2024-06-14 11:59:50,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:50,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:51,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:51,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92590679] [2024-06-14 11:59:51,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92590679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:51,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:51,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:59:51,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096368722] [2024-06-14 11:59:51,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:51,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:59:51,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:51,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:59:51,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:59:51,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-14 11:59:51,316 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) [2024-06-14 11:59:51,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:51,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-14 11:59:51,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:52,473 INFO L124 PetriNetUnfolderBase]: 7882/11123 cut-off events. [2024-06-14 11:59:52,473 INFO L125 PetriNetUnfolderBase]: For 2157/2157 co-relation queries the response was YES. [2024-06-14 11:59:52,487 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. [2024-06-14 11:59:52,527 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 54 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-14 11:59:52,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 327 flow [2024-06-14 11:59:52,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:59:52,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:59:52,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-14 11:59:52,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064814814814815 [2024-06-14 11:59:52,530 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 131 transitions. [2024-06-14 11:59:52,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 327 flow [2024-06-14 11:59:52,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:59:52,535 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-14 11:59:52,535 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} [2024-06-14 11:59:52,536 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-14 11:59:52,536 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-14 11:59:52,536 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) [2024-06-14 11:59:52,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:52,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:52,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:59:52,537 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)] === [2024-06-14 11:59:52,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:52,537 INFO L85 PathProgramCache]: Analyzing trace with hash -775291678, now seen corresponding path program 1 times [2024-06-14 11:59:52,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:52,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250874909] [2024-06-14 11:59:52,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:52,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:53,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:53,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250874909] [2024-06-14 11:59:53,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250874909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:53,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:53,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:59:53,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648441989] [2024-06-14 11:59:53,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:53,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:59:53,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:53,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:59:53,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:59:53,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:59:53,851 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) [2024-06-14 11:59:53,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:53,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:59:53,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:55,198 INFO L124 PetriNetUnfolderBase]: 9557/13418 cut-off events. [2024-06-14 11:59:55,199 INFO L125 PetriNetUnfolderBase]: For 7145/7145 co-relation queries the response was YES. [2024-06-14 11:59:55,220 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. [2024-06-14 11:59:55,369 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 75 selfloop transitions, 17 changer transitions 0/100 dead transitions. [2024-06-14 11:59:55,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 100 transitions, 514 flow [2024-06-14 11:59:55,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:59:55,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:59:55,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-14 11:59:55,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-14 11:59:55,371 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 6 states and 186 transitions. [2024-06-14 11:59:55,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 100 transitions, 514 flow [2024-06-14 11:59:55,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 100 transitions, 486 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-14 11:59:55,378 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 260 flow [2024-06-14 11:59:55,378 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} [2024-06-14 11:59:55,379 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2024-06-14 11:59:55,380 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 260 flow [2024-06-14 11:59:55,380 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) [2024-06-14 11:59:55,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:55,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:55,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:59:55,381 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)] === [2024-06-14 11:59:55,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:55,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1735763174, now seen corresponding path program 1 times [2024-06-14 11:59:55,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:55,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8660164] [2024-06-14 11:59:55,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:55,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:56,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:56,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8660164] [2024-06-14 11:59:56,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8660164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:56,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:56,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:59:56,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472058405] [2024-06-14 11:59:56,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:56,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:59:56,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:56,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:59:56,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:59:56,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:59:56,699 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) [2024-06-14 11:59:56,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:56,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:59:56,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:58,364 INFO L124 PetriNetUnfolderBase]: 9541/13386 cut-off events. [2024-06-14 11:59:58,364 INFO L125 PetriNetUnfolderBase]: For 14418/14418 co-relation queries the response was YES. [2024-06-14 11:59:58,383 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. [2024-06-14 11:59:58,428 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 82 selfloop transitions, 20 changer transitions 0/110 dead transitions. [2024-06-14 11:59:58,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 110 transitions, 604 flow [2024-06-14 11:59:58,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:59:58,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:59:58,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-14 11:59:58,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582010582010583 [2024-06-14 11:59:58,430 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 260 flow. Second operand 7 states and 211 transitions. [2024-06-14 11:59:58,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 110 transitions, 604 flow [2024-06-14 11:59:58,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 110 transitions, 565 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 11:59:58,434 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 293 flow [2024-06-14 11:59:58,434 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} [2024-06-14 11:59:58,436 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2024-06-14 11:59:58,436 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 293 flow [2024-06-14 11:59:58,436 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) [2024-06-14 11:59:58,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:58,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:58,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:59:58,437 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)] === [2024-06-14 11:59:58,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:58,437 INFO L85 PathProgramCache]: Analyzing trace with hash 961408705, now seen corresponding path program 1 times [2024-06-14 11:59:58,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:58,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855495482] [2024-06-14 11:59:58,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:58,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:59,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:59,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855495482] [2024-06-14 11:59:59,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855495482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:59,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:59,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:59:59,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019618744] [2024-06-14 11:59:59,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:59,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:59:59,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:59,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:59:59,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:59:59,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:59:59,305 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) [2024-06-14 11:59:59,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:59,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:59:59,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:00,951 INFO L124 PetriNetUnfolderBase]: 11584/16172 cut-off events. [2024-06-14 12:00:00,951 INFO L125 PetriNetUnfolderBase]: For 26114/26114 co-relation queries the response was YES. [2024-06-14 12:00:00,981 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. [2024-06-14 12:00:01,039 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 66 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2024-06-14 12:00:01,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 83 transitions, 515 flow [2024-06-14 12:00:01,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:00:01,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:00:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-14 12:00:01,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-14 12:00:01,041 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 293 flow. Second operand 5 states and 129 transitions. [2024-06-14 12:00:01,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 83 transitions, 515 flow [2024-06-14 12:00:01,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 461 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 12:00:01,047 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 304 flow [2024-06-14 12:00:01,047 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} [2024-06-14 12:00:01,048 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2024-06-14 12:00:01,048 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 304 flow [2024-06-14 12:00:01,048 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) [2024-06-14 12:00:01,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:01,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:01,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:00:01,049 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)] === [2024-06-14 12:00:01,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:01,049 INFO L85 PathProgramCache]: Analyzing trace with hash -261100217, now seen corresponding path program 1 times [2024-06-14 12:00:01,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:01,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898644619] [2024-06-14 12:00:01,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:01,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:01,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:01,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:01,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898644619] [2024-06-14 12:00:01,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898644619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:01,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:01,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:00:01,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696234270] [2024-06-14 12:00:01,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:01,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:00:01,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:01,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:00:01,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:00:02,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:00:02,093 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) [2024-06-14 12:00:02,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:02,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:00:02,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:03,844 INFO L124 PetriNetUnfolderBase]: 11566/16147 cut-off events. [2024-06-14 12:00:03,844 INFO L125 PetriNetUnfolderBase]: For 37275/37275 co-relation queries the response was YES. [2024-06-14 12:00:03,879 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. [2024-06-14 12:00:03,940 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 74 selfloop transitions, 14 changer transitions 0/95 dead transitions. [2024-06-14 12:00:03,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 576 flow [2024-06-14 12:00:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:00:03,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:00:03,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 12:00:03,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2024-06-14 12:00:03,944 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 304 flow. Second operand 6 states and 154 transitions. [2024-06-14 12:00:03,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 576 flow [2024-06-14 12:00:03,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 95 transitions, 543 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 12:00:03,952 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 350 flow [2024-06-14 12:00:03,952 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} [2024-06-14 12:00:03,952 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 13 predicate places. [2024-06-14 12:00:03,952 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 350 flow [2024-06-14 12:00:03,953 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) [2024-06-14 12:00:03,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:03,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:03,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:00:03,953 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)] === [2024-06-14 12:00:03,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:03,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1499061488, now seen corresponding path program 1 times [2024-06-14 12:00:03,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:03,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409123172] [2024-06-14 12:00:03,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:03,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:04,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:04,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409123172] [2024-06-14 12:00:04,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409123172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:04,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:04,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:00:04,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792057420] [2024-06-14 12:00:04,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:04,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:00:04,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:04,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:00:04,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:00:05,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:00:05,092 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) [2024-06-14 12:00:05,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:05,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:00:05,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:06,811 INFO L124 PetriNetUnfolderBase]: 11588/16238 cut-off events. [2024-06-14 12:00:06,811 INFO L125 PetriNetUnfolderBase]: For 49772/49782 co-relation queries the response was YES. [2024-06-14 12:00:06,840 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. [2024-06-14 12:00:06,900 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 80 selfloop transitions, 21 changer transitions 0/108 dead transitions. [2024-06-14 12:00:06,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 108 transitions, 736 flow [2024-06-14 12:00:06,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:00:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:00:06,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-14 12:00:06,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49691358024691357 [2024-06-14 12:00:06,903 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 350 flow. Second operand 6 states and 161 transitions. [2024-06-14 12:00:06,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 108 transitions, 736 flow [2024-06-14 12:00:06,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 108 transitions, 689 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:00:06,914 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 436 flow [2024-06-14 12:00:06,915 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} [2024-06-14 12:00:06,917 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2024-06-14 12:00:06,917 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 436 flow [2024-06-14 12:00:06,917 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) [2024-06-14 12:00:06,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:06,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:06,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:00:06,918 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)] === [2024-06-14 12:00:06,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:06,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1040102530, now seen corresponding path program 2 times [2024-06-14 12:00:06,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:06,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908843353] [2024-06-14 12:00:06,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:06,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:07,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:07,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908843353] [2024-06-14 12:00:07,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908843353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:07,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:07,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:00:07,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403783365] [2024-06-14 12:00:07,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:07,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:00:07,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:07,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:00:07,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:00:07,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:00:07,984 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) [2024-06-14 12:00:07,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:07,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:00:07,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:09,804 INFO L124 PetriNetUnfolderBase]: 11579/16224 cut-off events. [2024-06-14 12:00:09,805 INFO L125 PetriNetUnfolderBase]: For 65160/65160 co-relation queries the response was YES. [2024-06-14 12:00:09,842 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. [2024-06-14 12:00:09,914 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 81 selfloop transitions, 14 changer transitions 0/102 dead transitions. [2024-06-14 12:00:09,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 102 transitions, 688 flow [2024-06-14 12:00:09,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:00:09,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:00:09,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 12:00:09,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-14 12:00:09,916 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 436 flow. Second operand 6 states and 153 transitions. [2024-06-14 12:00:09,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 102 transitions, 688 flow [2024-06-14 12:00:09,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 102 transitions, 626 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-14 12:00:09,951 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 413 flow [2024-06-14 12:00:09,951 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} [2024-06-14 12:00:09,953 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 19 predicate places. [2024-06-14 12:00:09,954 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 413 flow [2024-06-14 12:00:09,954 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) [2024-06-14 12:00:09,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:09,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:09,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:00:09,954 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)] === [2024-06-14 12:00:09,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:09,955 INFO L85 PathProgramCache]: Analyzing trace with hash -773853284, now seen corresponding path program 1 times [2024-06-14 12:00:09,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:09,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521364936] [2024-06-14 12:00:09,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:09,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:11,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:11,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521364936] [2024-06-14 12:00:11,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521364936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:11,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:11,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:00:11,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330952145] [2024-06-14 12:00:11,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:11,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:00:11,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:11,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:00:11,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:00:11,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:00:11,312 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) [2024-06-14 12:00:11,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:11,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:00:11,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:13,294 INFO L124 PetriNetUnfolderBase]: 11601/16257 cut-off events. [2024-06-14 12:00:13,294 INFO L125 PetriNetUnfolderBase]: For 72970/72970 co-relation queries the response was YES. [2024-06-14 12:00:13,335 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. [2024-06-14 12:00:13,400 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 94 selfloop transitions, 18 changer transitions 0/119 dead transitions. [2024-06-14 12:00:13,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 119 transitions, 775 flow [2024-06-14 12:00:13,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:00:13,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:00:13,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 12:00:13,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-14 12:00:13,401 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 413 flow. Second operand 7 states and 183 transitions. [2024-06-14 12:00:13,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 119 transitions, 775 flow [2024-06-14 12:00:13,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 119 transitions, 731 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:00:13,423 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 466 flow [2024-06-14 12:00:13,424 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} [2024-06-14 12:00:13,424 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 20 predicate places. [2024-06-14 12:00:13,424 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 466 flow [2024-06-14 12:00:13,425 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) [2024-06-14 12:00:13,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:13,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:13,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:00:13,425 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)] === [2024-06-14 12:00:13,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:13,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1986550130, now seen corresponding path program 2 times [2024-06-14 12:00:13,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:13,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340966907] [2024-06-14 12:00:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:13,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:14,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:14,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340966907] [2024-06-14 12:00:14,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340966907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:14,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:14,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:00:14,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181603511] [2024-06-14 12:00:14,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:14,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:00:14,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:14,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:00:14,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:00:14,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:00:14,602 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) [2024-06-14 12:00:14,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:14,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:00:14,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:16,343 INFO L124 PetriNetUnfolderBase]: 11623/16289 cut-off events. [2024-06-14 12:00:16,343 INFO L125 PetriNetUnfolderBase]: For 91615/91625 co-relation queries the response was YES. [2024-06-14 12:00:16,381 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. [2024-06-14 12:00:16,449 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 85 selfloop transitions, 35 changer transitions 0/127 dead transitions. [2024-06-14 12:00:16,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 127 transitions, 954 flow [2024-06-14 12:00:16,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:00:16,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:00:16,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-14 12:00:16,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947089947089947 [2024-06-14 12:00:16,450 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 466 flow. Second operand 7 states and 187 transitions. [2024-06-14 12:00:16,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 127 transitions, 954 flow [2024-06-14 12:00:16,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 127 transitions, 889 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 12:00:16,482 INFO L231 Difference]: Finished difference. Result has 79 places, 90 transitions, 590 flow [2024-06-14 12:00:16,483 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} [2024-06-14 12:00:16,483 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 22 predicate places. [2024-06-14 12:00:16,483 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 90 transitions, 590 flow [2024-06-14 12:00:16,484 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) [2024-06-14 12:00:16,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:16,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:16,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:00:16,484 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)] === [2024-06-14 12:00:16,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:16,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1986549944, now seen corresponding path program 1 times [2024-06-14 12:00:16,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:16,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173639835] [2024-06-14 12:00:16,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:16,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:17,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:17,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173639835] [2024-06-14 12:00:17,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173639835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:17,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:17,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:00:17,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837980435] [2024-06-14 12:00:17,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:17,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:00:17,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:17,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:00:17,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:00:17,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:00:17,582 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) [2024-06-14 12:00:17,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:17,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:00:17,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:19,436 INFO L124 PetriNetUnfolderBase]: 11698/16348 cut-off events. [2024-06-14 12:00:19,436 INFO L125 PetriNetUnfolderBase]: For 116742/116748 co-relation queries the response was YES. [2024-06-14 12:00:19,468 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. [2024-06-14 12:00:19,535 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 103 selfloop transitions, 31 changer transitions 0/141 dead transitions. [2024-06-14 12:00:19,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 141 transitions, 1126 flow [2024-06-14 12:00:19,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:00:19,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:00:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-14 12:00:19,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:00:19,536 INFO L175 Difference]: Start difference. First operand has 79 places, 90 transitions, 590 flow. Second operand 7 states and 189 transitions. [2024-06-14 12:00:19,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 141 transitions, 1126 flow [2024-06-14 12:00:19,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 141 transitions, 1064 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-14 12:00:19,581 INFO L231 Difference]: Finished difference. Result has 84 places, 102 transitions, 738 flow [2024-06-14 12:00:19,581 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} [2024-06-14 12:00:19,582 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 27 predicate places. [2024-06-14 12:00:19,582 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 102 transitions, 738 flow [2024-06-14 12:00:19,582 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) [2024-06-14 12:00:19,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:19,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:19,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:00:19,582 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)] === [2024-06-14 12:00:19,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:19,583 INFO L85 PathProgramCache]: Analyzing trace with hash -2116558938, now seen corresponding path program 2 times [2024-06-14 12:00:19,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:19,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195543393] [2024-06-14 12:00:19,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:19,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:20,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:20,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195543393] [2024-06-14 12:00:20,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195543393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:20,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:20,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:00:20,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788087087] [2024-06-14 12:00:20,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:20,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:00:20,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:20,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:00:20,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:00:20,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:00:20,684 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) [2024-06-14 12:00:20,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:20,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:00:20,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:22,599 INFO L124 PetriNetUnfolderBase]: 11742/16409 cut-off events. [2024-06-14 12:00:22,599 INFO L125 PetriNetUnfolderBase]: For 141414/141414 co-relation queries the response was YES. [2024-06-14 12:00:22,661 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. [2024-06-14 12:00:22,736 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 110 selfloop transitions, 25 changer transitions 0/142 dead transitions. [2024-06-14 12:00:22,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 142 transitions, 1224 flow [2024-06-14 12:00:22,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:00:22,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:00:22,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 12:00:22,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-14 12:00:22,741 INFO L175 Difference]: Start difference. First operand has 84 places, 102 transitions, 738 flow. Second operand 7 states and 184 transitions. [2024-06-14 12:00:22,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 142 transitions, 1224 flow [2024-06-14 12:00:22,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 142 transitions, 1177 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-14 12:00:22,803 INFO L231 Difference]: Finished difference. Result has 89 places, 106 transitions, 808 flow [2024-06-14 12:00:22,803 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} [2024-06-14 12:00:22,804 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 32 predicate places. [2024-06-14 12:00:22,804 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 106 transitions, 808 flow [2024-06-14 12:00:22,804 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) [2024-06-14 12:00:22,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:22,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:22,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:00:22,804 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)] === [2024-06-14 12:00:22,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:22,805 INFO L85 PathProgramCache]: Analyzing trace with hash -769091684, now seen corresponding path program 3 times [2024-06-14 12:00:22,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:22,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142987431] [2024-06-14 12:00:22,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:22,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:23,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:23,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142987431] [2024-06-14 12:00:23,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142987431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:23,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:23,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:00:23,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511376892] [2024-06-14 12:00:23,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:23,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:00:23,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:23,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:00:23,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:00:23,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:00:23,834 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) [2024-06-14 12:00:23,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:23,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:00:23,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:25,635 INFO L124 PetriNetUnfolderBase]: 11733/16397 cut-off events. [2024-06-14 12:00:25,635 INFO L125 PetriNetUnfolderBase]: For 155679/155679 co-relation queries the response was YES. [2024-06-14 12:00:25,692 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. [2024-06-14 12:00:25,762 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 112 selfloop transitions, 18 changer transitions 0/137 dead transitions. [2024-06-14 12:00:25,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 137 transitions, 1148 flow [2024-06-14 12:00:25,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:00:25,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:00:25,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 12:00:25,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-14 12:00:25,763 INFO L175 Difference]: Start difference. First operand has 89 places, 106 transitions, 808 flow. Second operand 7 states and 177 transitions. [2024-06-14 12:00:25,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 137 transitions, 1148 flow [2024-06-14 12:00:25,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 137 transitions, 1022 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 12:00:25,841 INFO L231 Difference]: Finished difference. Result has 91 places, 106 transitions, 729 flow [2024-06-14 12:00:25,841 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} [2024-06-14 12:00:25,842 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 34 predicate places. [2024-06-14 12:00:25,842 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 106 transitions, 729 flow [2024-06-14 12:00:25,842 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) [2024-06-14 12:00:25,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:25,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:25,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:00:25,842 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)] === [2024-06-14 12:00:25,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:25,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1809411914, now seen corresponding path program 3 times [2024-06-14 12:00:25,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:25,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56582307] [2024-06-14 12:00:25,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:25,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:26,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:26,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56582307] [2024-06-14 12:00:26,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56582307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:26,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:26,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:00:26,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132954386] [2024-06-14 12:00:26,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:26,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:00:26,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:26,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:00:26,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:00:26,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:00:26,816 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) [2024-06-14 12:00:26,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:26,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:00:26,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:28,603 INFO L124 PetriNetUnfolderBase]: 11715/16373 cut-off events. [2024-06-14 12:00:28,603 INFO L125 PetriNetUnfolderBase]: For 169337/169337 co-relation queries the response was YES. [2024-06-14 12:00:28,647 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. [2024-06-14 12:00:28,709 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 113 selfloop transitions, 18 changer transitions 0/138 dead transitions. [2024-06-14 12:00:28,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 138 transitions, 1075 flow [2024-06-14 12:00:28,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:00:28,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:00:28,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 12:00:28,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-14 12:00:28,710 INFO L175 Difference]: Start difference. First operand has 91 places, 106 transitions, 729 flow. Second operand 7 states and 178 transitions. [2024-06-14 12:00:28,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 138 transitions, 1075 flow [2024-06-14 12:00:28,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 138 transitions, 986 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 12:00:28,787 INFO L231 Difference]: Finished difference. Result has 92 places, 106 transitions, 687 flow [2024-06-14 12:00:28,787 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} [2024-06-14 12:00:28,787 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 35 predicate places. [2024-06-14 12:00:28,787 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 106 transitions, 687 flow [2024-06-14 12:00:28,788 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) [2024-06-14 12:00:28,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:28,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:28,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:00:28,788 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)] === [2024-06-14 12:00:28,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:28,788 INFO L85 PathProgramCache]: Analyzing trace with hash 2047275388, now seen corresponding path program 1 times [2024-06-14 12:00:28,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:28,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334045598] [2024-06-14 12:00:28,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:28,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:29,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:29,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:29,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334045598] [2024-06-14 12:00:29,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334045598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:29,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:29,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:00:29,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226500931] [2024-06-14 12:00:29,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:29,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:00:29,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:29,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:00:29,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:00:29,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:29,572 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) [2024-06-14 12:00:29,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:29,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:29,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:31,501 INFO L124 PetriNetUnfolderBase]: 12587/18284 cut-off events. [2024-06-14 12:00:31,502 INFO L125 PetriNetUnfolderBase]: For 203200/203200 co-relation queries the response was YES. [2024-06-14 12:00:31,577 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. [2024-06-14 12:00:31,654 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 95 selfloop transitions, 10 changer transitions 0/125 dead transitions. [2024-06-14 12:00:31,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 125 transitions, 977 flow [2024-06-14 12:00:31,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:00:31,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:00:31,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-14 12:00:31,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-14 12:00:31,655 INFO L175 Difference]: Start difference. First operand has 92 places, 106 transitions, 687 flow. Second operand 5 states and 130 transitions. [2024-06-14 12:00:31,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 125 transitions, 977 flow [2024-06-14 12:00:31,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 125 transitions, 923 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 12:00:31,780 INFO L231 Difference]: Finished difference. Result has 91 places, 110 transitions, 712 flow [2024-06-14 12:00:31,781 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} [2024-06-14 12:00:31,782 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 34 predicate places. [2024-06-14 12:00:31,782 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 110 transitions, 712 flow [2024-06-14 12:00:31,782 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) [2024-06-14 12:00:31,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:31,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:31,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:00:31,782 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)] === [2024-06-14 12:00:31,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:31,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1780262607, now seen corresponding path program 1 times [2024-06-14 12:00:31,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:31,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078728128] [2024-06-14 12:00:31,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:31,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:33,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:33,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078728128] [2024-06-14 12:00:33,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078728128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:33,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:33,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:33,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60529650] [2024-06-14 12:00:33,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:33,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:33,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:33,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:33,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:33,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:00:33,353 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) [2024-06-14 12:00:33,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:33,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:00:33,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:35,510 INFO L124 PetriNetUnfolderBase]: 11754/16700 cut-off events. [2024-06-14 12:00:35,511 INFO L125 PetriNetUnfolderBase]: For 202858/202858 co-relation queries the response was YES. [2024-06-14 12:00:35,588 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. [2024-06-14 12:00:35,672 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 138 selfloop transitions, 30 changer transitions 0/175 dead transitions. [2024-06-14 12:00:35,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 175 transitions, 1402 flow [2024-06-14 12:00:35,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:00:35,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:00:35,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-14 12:00:35,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897119341563786 [2024-06-14 12:00:35,674 INFO L175 Difference]: Start difference. First operand has 91 places, 110 transitions, 712 flow. Second operand 9 states and 238 transitions. [2024-06-14 12:00:35,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 175 transitions, 1402 flow [2024-06-14 12:00:35,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 175 transitions, 1353 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 12:00:35,777 INFO L231 Difference]: Finished difference. Result has 97 places, 118 transitions, 862 flow [2024-06-14 12:00:35,777 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} [2024-06-14 12:00:35,777 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 40 predicate places. [2024-06-14 12:00:35,778 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 118 transitions, 862 flow [2024-06-14 12:00:35,778 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) [2024-06-14 12:00:35,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:35,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:35,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:00:35,778 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)] === [2024-06-14 12:00:35,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:35,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1780352972, now seen corresponding path program 1 times [2024-06-14 12:00:35,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:35,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521468837] [2024-06-14 12:00:35,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:35,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:36,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:36,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:36,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521468837] [2024-06-14 12:00:36,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521468837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:36,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:36,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:36,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066246420] [2024-06-14 12:00:36,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:36,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:36,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:36,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:36,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:37,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:00:37,031 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) [2024-06-14 12:00:37,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:37,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:00:37,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:39,095 INFO L124 PetriNetUnfolderBase]: 11798/16707 cut-off events. [2024-06-14 12:00:39,095 INFO L125 PetriNetUnfolderBase]: For 238063/238063 co-relation queries the response was YES. [2024-06-14 12:00:39,159 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. [2024-06-14 12:00:39,235 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 138 selfloop transitions, 22 changer transitions 0/167 dead transitions. [2024-06-14 12:00:39,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 167 transitions, 1364 flow [2024-06-14 12:00:39,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:39,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:39,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-14 12:00:39,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-14 12:00:39,237 INFO L175 Difference]: Start difference. First operand has 97 places, 118 transitions, 862 flow. Second operand 8 states and 208 transitions. [2024-06-14 12:00:39,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 167 transitions, 1364 flow [2024-06-14 12:00:39,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 167 transitions, 1274 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 12:00:39,350 INFO L231 Difference]: Finished difference. Result has 100 places, 122 transitions, 899 flow [2024-06-14 12:00:39,350 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} [2024-06-14 12:00:39,350 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 43 predicate places. [2024-06-14 12:00:39,351 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 122 transitions, 899 flow [2024-06-14 12:00:39,351 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) [2024-06-14 12:00:39,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:39,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:39,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:00:39,351 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)] === [2024-06-14 12:00:39,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:39,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1457230111, now seen corresponding path program 2 times [2024-06-14 12:00:39,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:39,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410750938] [2024-06-14 12:00:39,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:39,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:40,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:40,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410750938] [2024-06-14 12:00:40,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410750938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:40,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:40,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:40,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881895091] [2024-06-14 12:00:40,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:40,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:40,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:40,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:40,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:40,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:00:40,755 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) [2024-06-14 12:00:40,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:40,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:00:40,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:42,837 INFO L124 PetriNetUnfolderBase]: 11789/16702 cut-off events. [2024-06-14 12:00:42,837 INFO L125 PetriNetUnfolderBase]: For 268108/268108 co-relation queries the response was YES. [2024-06-14 12:00:42,900 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. [2024-06-14 12:00:42,978 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 137 selfloop transitions, 22 changer transitions 0/166 dead transitions. [2024-06-14 12:00:42,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 166 transitions, 1331 flow [2024-06-14 12:00:42,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:42,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:42,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 12:00:42,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-14 12:00:42,980 INFO L175 Difference]: Start difference. First operand has 100 places, 122 transitions, 899 flow. Second operand 8 states and 207 transitions. [2024-06-14 12:00:42,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 166 transitions, 1331 flow [2024-06-14 12:00:43,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 166 transitions, 1206 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-14 12:00:43,108 INFO L231 Difference]: Finished difference. Result has 102 places, 122 transitions, 829 flow [2024-06-14 12:00:43,108 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} [2024-06-14 12:00:43,108 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 45 predicate places. [2024-06-14 12:00:43,109 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 122 transitions, 829 flow [2024-06-14 12:00:43,109 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) [2024-06-14 12:00:43,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:43,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:43,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:00:43,111 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)] === [2024-06-14 12:00:43,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:43,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1453511041, now seen corresponding path program 3 times [2024-06-14 12:00:43,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:43,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684180647] [2024-06-14 12:00:43,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:43,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:44,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:44,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684180647] [2024-06-14 12:00:44,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684180647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:44,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:44,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:44,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078894530] [2024-06-14 12:00:44,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:44,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:44,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:44,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:44,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:44,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:00:44,622 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) [2024-06-14 12:00:44,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:44,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:00:44,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:46,612 INFO L124 PetriNetUnfolderBase]: 11811/16734 cut-off events. [2024-06-14 12:00:46,612 INFO L125 PetriNetUnfolderBase]: For 289883/289888 co-relation queries the response was YES. [2024-06-14 12:00:46,677 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. [2024-06-14 12:00:46,760 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 121 selfloop transitions, 39 changer transitions 0/167 dead transitions. [2024-06-14 12:00:46,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 167 transitions, 1327 flow [2024-06-14 12:00:46,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:46,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:46,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-14 12:00:46,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-14 12:00:46,762 INFO L175 Difference]: Start difference. First operand has 102 places, 122 transitions, 829 flow. Second operand 8 states and 208 transitions. [2024-06-14 12:00:46,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 167 transitions, 1327 flow [2024-06-14 12:00:46,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 167 transitions, 1272 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 12:00:46,902 INFO L231 Difference]: Finished difference. Result has 103 places, 126 transitions, 943 flow [2024-06-14 12:00:46,902 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} [2024-06-14 12:00:46,905 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 46 predicate places. [2024-06-14 12:00:46,905 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 126 transitions, 943 flow [2024-06-14 12:00:46,905 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) [2024-06-14 12:00:46,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:46,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:46,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:00:46,906 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)] === [2024-06-14 12:00:46,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:46,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1385745610, now seen corresponding path program 2 times [2024-06-14 12:00:46,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:46,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649840502] [2024-06-14 12:00:46,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:46,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:47,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:47,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649840502] [2024-06-14 12:00:47,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649840502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:47,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:47,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:47,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184034309] [2024-06-14 12:00:47,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:47,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:47,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:47,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:47,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:48,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:00:48,110 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) [2024-06-14 12:00:48,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:48,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:00:48,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:50,151 INFO L124 PetriNetUnfolderBase]: 11948/16917 cut-off events. [2024-06-14 12:00:50,151 INFO L125 PetriNetUnfolderBase]: For 330825/330828 co-relation queries the response was YES. [2024-06-14 12:00:50,219 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. [2024-06-14 12:00:50,306 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 122 selfloop transitions, 60 changer transitions 0/189 dead transitions. [2024-06-14 12:00:50,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 189 transitions, 1893 flow [2024-06-14 12:00:50,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:50,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:50,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-14 12:00:50,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-14 12:00:50,308 INFO L175 Difference]: Start difference. First operand has 103 places, 126 transitions, 943 flow. Second operand 8 states and 222 transitions. [2024-06-14 12:00:50,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 189 transitions, 1893 flow [2024-06-14 12:00:50,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 189 transitions, 1756 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:00:50,491 INFO L231 Difference]: Finished difference. Result has 105 places, 138 transitions, 1173 flow [2024-06-14 12:00:50,491 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} [2024-06-14 12:00:50,491 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 48 predicate places. [2024-06-14 12:00:50,492 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 138 transitions, 1173 flow [2024-06-14 12:00:50,492 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) [2024-06-14 12:00:50,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:50,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:50,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:00:50,492 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)] === [2024-06-14 12:00:50,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:50,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1385740030, now seen corresponding path program 3 times [2024-06-14 12:00:50,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:50,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702228199] [2024-06-14 12:00:50,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:50,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:51,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:51,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702228199] [2024-06-14 12:00:51,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702228199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:51,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:51,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:51,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331564266] [2024-06-14 12:00:51,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:51,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:51,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:51,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:51,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:51,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:00:51,683 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) [2024-06-14 12:00:51,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:51,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:00:51,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:53,765 INFO L124 PetriNetUnfolderBase]: 11930/16893 cut-off events. [2024-06-14 12:00:53,765 INFO L125 PetriNetUnfolderBase]: For 369699/369702 co-relation queries the response was YES. [2024-06-14 12:00:53,820 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. [2024-06-14 12:00:53,897 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 117 selfloop transitions, 61 changer transitions 0/185 dead transitions. [2024-06-14 12:00:53,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 185 transitions, 1771 flow [2024-06-14 12:00:53,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:53,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:53,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-14 12:00:53,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023148148148148 [2024-06-14 12:00:53,898 INFO L175 Difference]: Start difference. First operand has 105 places, 138 transitions, 1173 flow. Second operand 8 states and 217 transitions. [2024-06-14 12:00:53,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 185 transitions, 1771 flow [2024-06-14 12:00:54,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 185 transitions, 1612 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-14 12:00:54,094 INFO L231 Difference]: Finished difference. Result has 110 places, 138 transitions, 1147 flow [2024-06-14 12:00:54,094 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} [2024-06-14 12:00:54,094 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 53 predicate places. [2024-06-14 12:00:54,094 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 138 transitions, 1147 flow [2024-06-14 12:00:54,095 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) [2024-06-14 12:00:54,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:54,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:54,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:00:54,095 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)] === [2024-06-14 12:00:54,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:54,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1181465174, now seen corresponding path program 4 times [2024-06-14 12:00:54,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:54,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597451556] [2024-06-14 12:00:54,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:54,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:55,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:55,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597451556] [2024-06-14 12:00:55,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597451556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:55,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:55,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:55,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364604440] [2024-06-14 12:00:55,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:55,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:55,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:55,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:55,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:55,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:00:55,153 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) [2024-06-14 12:00:55,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:55,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:00:55,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:57,367 INFO L124 PetriNetUnfolderBase]: 11974/16954 cut-off events. [2024-06-14 12:00:57,367 INFO L125 PetriNetUnfolderBase]: For 393776/393776 co-relation queries the response was YES. [2024-06-14 12:00:57,420 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. [2024-06-14 12:00:57,493 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 153 selfloop transitions, 22 changer transitions 0/182 dead transitions. [2024-06-14 12:00:57,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 182 transitions, 1695 flow [2024-06-14 12:00:57,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:57,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:57,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 12:00:57,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4699074074074074 [2024-06-14 12:00:57,495 INFO L175 Difference]: Start difference. First operand has 110 places, 138 transitions, 1147 flow. Second operand 8 states and 203 transitions. [2024-06-14 12:00:57,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 182 transitions, 1695 flow [2024-06-14 12:00:57,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 182 transitions, 1554 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 12:00:57,644 INFO L231 Difference]: Finished difference. Result has 111 places, 142 transitions, 1161 flow [2024-06-14 12:00:57,644 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} [2024-06-14 12:00:57,644 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 54 predicate places. [2024-06-14 12:00:57,644 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 142 transitions, 1161 flow [2024-06-14 12:00:57,644 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) [2024-06-14 12:00:57,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:57,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:57,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:00:57,645 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)] === [2024-06-14 12:00:57,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:57,645 INFO L85 PathProgramCache]: Analyzing trace with hash -257395482, now seen corresponding path program 5 times [2024-06-14 12:00:57,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:57,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040342991] [2024-06-14 12:00:57,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:57,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:58,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:58,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040342991] [2024-06-14 12:00:58,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040342991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:58,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:58,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:58,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648322157] [2024-06-14 12:00:58,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:58,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:58,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:58,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:58,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:58,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:00:58,731 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) [2024-06-14 12:00:58,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:58,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:00:58,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:01,228 INFO L124 PetriNetUnfolderBase]: 12018/17022 cut-off events. [2024-06-14 12:01:01,229 INFO L125 PetriNetUnfolderBase]: For 420972/420972 co-relation queries the response was YES. [2024-06-14 12:01:01,285 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. [2024-06-14 12:01:01,364 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 144 selfloop transitions, 39 changer transitions 0/190 dead transitions. [2024-06-14 12:01:01,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 190 transitions, 1865 flow [2024-06-14 12:01:01,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:01,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:01,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-14 12:01:01,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48842592592592593 [2024-06-14 12:01:01,366 INFO L175 Difference]: Start difference. First operand has 111 places, 142 transitions, 1161 flow. Second operand 8 states and 211 transitions. [2024-06-14 12:01:01,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 190 transitions, 1865 flow [2024-06-14 12:01:01,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 190 transitions, 1758 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:01,550 INFO L231 Difference]: Finished difference. Result has 113 places, 146 transitions, 1235 flow [2024-06-14 12:01:01,550 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} [2024-06-14 12:01:01,550 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 56 predicate places. [2024-06-14 12:01:01,550 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 146 transitions, 1235 flow [2024-06-14 12:01:01,550 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) [2024-06-14 12:01:01,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:01,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:01,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:01:01,551 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)] === [2024-06-14 12:01:01,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:01,551 INFO L85 PathProgramCache]: Analyzing trace with hash -257401062, now seen corresponding path program 6 times [2024-06-14 12:01:01,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:01,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752838623] [2024-06-14 12:01:01,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:01,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:02,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:02,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752838623] [2024-06-14 12:01:02,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752838623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:02,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:02,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:02,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588044938] [2024-06-14 12:01:02,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:02,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:02,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:02,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:02,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:02,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:01:02,770 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) [2024-06-14 12:01:02,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:02,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:01:02,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:05,177 INFO L124 PetriNetUnfolderBase]: 12000/16998 cut-off events. [2024-06-14 12:01:05,177 INFO L125 PetriNetUnfolderBase]: For 445289/445289 co-relation queries the response was YES. [2024-06-14 12:01:05,241 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. [2024-06-14 12:01:05,334 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 140 selfloop transitions, 40 changer transitions 0/187 dead transitions. [2024-06-14 12:01:05,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 187 transitions, 1705 flow [2024-06-14 12:01:05,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:05,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:05,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 12:01:05,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-14 12:01:05,335 INFO L175 Difference]: Start difference. First operand has 113 places, 146 transitions, 1235 flow. Second operand 8 states and 207 transitions. [2024-06-14 12:01:05,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 187 transitions, 1705 flow [2024-06-14 12:01:05,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 187 transitions, 1463 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:05,616 INFO L231 Difference]: Finished difference. Result has 115 places, 146 transitions, 1084 flow [2024-06-14 12:01:05,616 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} [2024-06-14 12:01:05,616 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 58 predicate places. [2024-06-14 12:01:05,616 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 146 transitions, 1084 flow [2024-06-14 12:01:05,617 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) [2024-06-14 12:01:05,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:05,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:05,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:01:05,617 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)] === [2024-06-14 12:01:05,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:05,617 INFO L85 PathProgramCache]: Analyzing trace with hash -257401217, now seen corresponding path program 4 times [2024-06-14 12:01:05,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:05,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562548066] [2024-06-14 12:01:05,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:05,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:06,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:06,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562548066] [2024-06-14 12:01:06,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562548066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:06,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:06,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:06,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239981900] [2024-06-14 12:01:06,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:06,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:06,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:06,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:06,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:07,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:01:07,138 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) [2024-06-14 12:01:07,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:07,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:01:07,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:09,317 INFO L124 PetriNetUnfolderBase]: 11991/16986 cut-off events. [2024-06-14 12:01:09,317 INFO L125 PetriNetUnfolderBase]: For 467626/467626 co-relation queries the response was YES. [2024-06-14 12:01:09,380 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. [2024-06-14 12:01:09,465 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 159 selfloop transitions, 22 changer transitions 0/188 dead transitions. [2024-06-14 12:01:09,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 188 transitions, 1628 flow [2024-06-14 12:01:09,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:09,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:09,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 12:01:09,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652777777777778 [2024-06-14 12:01:09,466 INFO L175 Difference]: Start difference. First operand has 115 places, 146 transitions, 1084 flow. Second operand 8 states and 201 transitions. [2024-06-14 12:01:09,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 188 transitions, 1628 flow [2024-06-14 12:01:09,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 188 transitions, 1537 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 12:01:09,934 INFO L231 Difference]: Finished difference. Result has 116 places, 150 transitions, 1140 flow [2024-06-14 12:01:09,934 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} [2024-06-14 12:01:09,934 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 59 predicate places. [2024-06-14 12:01:09,935 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 150 transitions, 1140 flow [2024-06-14 12:01:09,935 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) [2024-06-14 12:01:09,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:09,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:09,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:01:09,935 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)] === [2024-06-14 12:01:09,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:09,935 INFO L85 PathProgramCache]: Analyzing trace with hash -249766785, now seen corresponding path program 1 times [2024-06-14 12:01:09,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:09,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988827483] [2024-06-14 12:01:09,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:09,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:11,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:11,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:11,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988827483] [2024-06-14 12:01:11,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988827483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:11,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:11,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:01:11,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191100197] [2024-06-14 12:01:11,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:11,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:01:11,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:11,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:01:11,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:01:11,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:01:11,517 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) [2024-06-14 12:01:11,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:11,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:01:11,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:14,439 INFO L124 PetriNetUnfolderBase]: 14155/19895 cut-off events. [2024-06-14 12:01:14,439 INFO L125 PetriNetUnfolderBase]: For 592324/592324 co-relation queries the response was YES. [2024-06-14 12:01:14,510 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. [2024-06-14 12:01:14,596 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 166 selfloop transitions, 24 changer transitions 0/196 dead transitions. [2024-06-14 12:01:14,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 196 transitions, 1722 flow [2024-06-14 12:01:14,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:14,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:14,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-14 12:01:14,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513888888888889 [2024-06-14 12:01:14,598 INFO L175 Difference]: Start difference. First operand has 116 places, 150 transitions, 1140 flow. Second operand 8 states and 195 transitions. [2024-06-14 12:01:14,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 196 transitions, 1722 flow [2024-06-14 12:01:14,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 196 transitions, 1607 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:14,934 INFO L231 Difference]: Finished difference. Result has 119 places, 157 transitions, 1198 flow [2024-06-14 12:01:14,934 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} [2024-06-14 12:01:14,935 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 62 predicate places. [2024-06-14 12:01:14,935 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 157 transitions, 1198 flow [2024-06-14 12:01:14,935 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) [2024-06-14 12:01:14,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:14,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:14,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:01:14,935 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)] === [2024-06-14 12:01:14,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:14,935 INFO L85 PathProgramCache]: Analyzing trace with hash -646493605, now seen corresponding path program 1 times [2024-06-14 12:01:14,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:14,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432110270] [2024-06-14 12:01:14,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:14,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:16,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:16,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432110270] [2024-06-14 12:01:16,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432110270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:16,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:16,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:01:16,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991117779] [2024-06-14 12:01:16,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:16,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:01:16,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:16,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:01:16,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:01:16,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:01:16,583 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) [2024-06-14 12:01:16,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:16,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:01:16,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:19,636 INFO L124 PetriNetUnfolderBase]: 13895/19577 cut-off events. [2024-06-14 12:01:19,636 INFO L125 PetriNetUnfolderBase]: For 646067/646067 co-relation queries the response was YES. [2024-06-14 12:01:19,714 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. [2024-06-14 12:01:19,812 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 183 selfloop transitions, 38 changer transitions 0/229 dead transitions. [2024-06-14 12:01:19,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 229 transitions, 2134 flow [2024-06-14 12:01:19,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:01:19,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:01:19,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 263 transitions. [2024-06-14 12:01:19,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48703703703703705 [2024-06-14 12:01:19,814 INFO L175 Difference]: Start difference. First operand has 119 places, 157 transitions, 1198 flow. Second operand 10 states and 263 transitions. [2024-06-14 12:01:19,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 229 transitions, 2134 flow [2024-06-14 12:01:20,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 229 transitions, 2022 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 12:01:20,272 INFO L231 Difference]: Finished difference. Result has 124 places, 163 transitions, 1350 flow [2024-06-14 12:01:20,272 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} [2024-06-14 12:01:20,272 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 67 predicate places. [2024-06-14 12:01:20,272 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 163 transitions, 1350 flow [2024-06-14 12:01:20,273 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) [2024-06-14 12:01:20,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:20,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:20,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:01:20,273 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)] === [2024-06-14 12:01:20,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:20,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1778944235, now seen corresponding path program 2 times [2024-06-14 12:01:20,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:20,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550599473] [2024-06-14 12:01:20,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:20,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:21,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:21,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:21,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550599473] [2024-06-14 12:01:21,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550599473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:21,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:21,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:01:21,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048238653] [2024-06-14 12:01:21,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:21,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:01:21,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:21,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:01:21,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:01:22,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:01:22,103 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) [2024-06-14 12:01:22,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:22,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:01:22,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:25,368 INFO L124 PetriNetUnfolderBase]: 13931/19629 cut-off events. [2024-06-14 12:01:25,368 INFO L125 PetriNetUnfolderBase]: For 707144/707144 co-relation queries the response was YES. [2024-06-14 12:01:25,453 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. [2024-06-14 12:01:25,548 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 187 selfloop transitions, 33 changer transitions 0/228 dead transitions. [2024-06-14 12:01:25,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 228 transitions, 2042 flow [2024-06-14 12:01:25,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:01:25,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:01:25,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-06-14 12:01:25,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47962962962962963 [2024-06-14 12:01:25,549 INFO L175 Difference]: Start difference. First operand has 124 places, 163 transitions, 1350 flow. Second operand 10 states and 259 transitions. [2024-06-14 12:01:25,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 228 transitions, 2042 flow [2024-06-14 12:01:25,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 228 transitions, 1875 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:25,988 INFO L231 Difference]: Finished difference. Result has 128 places, 166 transitions, 1357 flow [2024-06-14 12:01:25,988 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} [2024-06-14 12:01:25,989 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 71 predicate places. [2024-06-14 12:01:25,989 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 166 transitions, 1357 flow [2024-06-14 12:01:25,989 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) [2024-06-14 12:01:25,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:25,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:25,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:01:25,989 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)] === [2024-06-14 12:01:25,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:25,990 INFO L85 PathProgramCache]: Analyzing trace with hash -646433031, now seen corresponding path program 1 times [2024-06-14 12:01:25,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:25,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319554617] [2024-06-14 12:01:25,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:25,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:27,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:27,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319554617] [2024-06-14 12:01:27,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319554617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:27,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:27,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:01:27,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93202964] [2024-06-14 12:01:27,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:27,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:01:27,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:27,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:01:27,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:01:27,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:01:27,741 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) [2024-06-14 12:01:27,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:27,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:01:27,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:31,129 INFO L124 PetriNetUnfolderBase]: 13975/19629 cut-off events. [2024-06-14 12:01:31,129 INFO L125 PetriNetUnfolderBase]: For 753886/753886 co-relation queries the response was YES. [2024-06-14 12:01:31,209 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. [2024-06-14 12:01:31,308 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 172 selfloop transitions, 35 changer transitions 0/215 dead transitions. [2024-06-14 12:01:31,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 215 transitions, 1983 flow [2024-06-14 12:01:31,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:31,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:31,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-14 12:01:31,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48842592592592593 [2024-06-14 12:01:31,309 INFO L175 Difference]: Start difference. First operand has 128 places, 166 transitions, 1357 flow. Second operand 8 states and 211 transitions. [2024-06-14 12:01:31,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 215 transitions, 1983 flow [2024-06-14 12:01:31,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 215 transitions, 1867 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-14 12:01:31,720 INFO L231 Difference]: Finished difference. Result has 128 places, 170 transitions, 1429 flow [2024-06-14 12:01:31,721 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} [2024-06-14 12:01:31,721 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 71 predicate places. [2024-06-14 12:01:31,721 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 170 transitions, 1429 flow [2024-06-14 12:01:31,722 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) [2024-06-14 12:01:31,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:31,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:31,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:01:31,722 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)] === [2024-06-14 12:01:31,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:31,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2070507691, now seen corresponding path program 3 times [2024-06-14 12:01:31,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:31,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612344179] [2024-06-14 12:01:31,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:31,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:33,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:33,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612344179] [2024-06-14 12:01:33,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612344179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:33,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:33,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:01:33,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410210811] [2024-06-14 12:01:33,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:33,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:01:33,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:33,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:01:33,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:01:33,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:01:33,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 170 transitions, 1429 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) [2024-06-14 12:01:33,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:33,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:01:33,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand