./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix006_tso.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/mix006_tso.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/mix006_tso.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix006_tso.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-76401ed-m [2024-06-20 15:46:31,773 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:46:31,844 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:46:31,850 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:46:31,850 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:46:31,878 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:46:31,879 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:46:31,879 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:46:31,880 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:46:31,883 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:46:31,883 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:46:31,883 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:46:31,884 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:46:31,885 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:46:31,885 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:46:31,885 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:46:31,886 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:46:31,886 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:46:31,886 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:46:31,886 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:46:31,886 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:46:31,887 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:46:31,887 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:46:31,887 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:46:31,887 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:46:31,888 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:46:31,888 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:46:31,888 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:46:31,889 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:46:31,889 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:46:31,889 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:46:31,890 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:46:31,890 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:46:31,890 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:46:31,890 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:46:31,890 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:46:31,891 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:46:31,891 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:46:31,891 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:46:31,891 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:46:31,891 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:46:31,892 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:46:31,892 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:46:31,892 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:46:32,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:46:32,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:46:32,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:46:32,124 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:46:32,124 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:46:32,125 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix006_tso.oepc.i [2024-06-20 15:46:33,099 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:46:33,311 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:46:33,311 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix006_tso.oepc.i [2024-06-20 15:46:33,324 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a58ee2f7/4682801272a948299629864ea83d02b8/FLAG27b1dde0a [2024-06-20 15:46:33,342 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a58ee2f7/4682801272a948299629864ea83d02b8 [2024-06-20 15:46:33,344 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:46:33,345 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:46:33,345 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix006_tso.oepc.yml/witness.yml [2024-06-20 15:46:33,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:46:33,483 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:46:33,484 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:46:33,484 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:46:33,488 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:46:33,488 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:46:33" (1/2) ... [2024-06-20 15:46:33,489 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19199b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:46:33, skipping insertion in model container [2024-06-20 15:46:33,489 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:46:33" (1/2) ... [2024-06-20 15:46:33,490 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@190c3f82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:46:33, skipping insertion in model container [2024-06-20 15:46:33,491 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:46:33" (2/2) ... [2024-06-20 15:46:33,491 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19199b27 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:46:33, skipping insertion in model container [2024-06-20 15:46:33,491 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:46:33" (2/2) ... [2024-06-20 15:46:33,491 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:46:33,620 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:46:33,622 INFO L97 edCorrectnessWitness]: Location invariant before [L902-L902] (((((((((((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-20 15:46:33,622 INFO L97 edCorrectnessWitness]: Location invariant before [L905-L905] (((((((((((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-20 15:46:33,622 INFO L97 edCorrectnessWitness]: Location invariant before [L904-L904] (((((((((((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-20 15:46:33,622 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:46:33,622 INFO L106 edCorrectnessWitness]: ghost_update [L900-L900] multithreaded = 1; [2024-06-20 15:46:33,657 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:46:34,034 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:46:34,042 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:46:34,192 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:46:34,231 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:46:34,232 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:46:34 WrapperNode [2024-06-20 15:46:34,232 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:46:34,233 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:46:34,233 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:46:34,233 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:46:34,238 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:46:34" (1/1) ... [2024-06-20 15:46:34,262 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:46:34" (1/1) ... [2024-06-20 15:46:34,309 INFO L138 Inliner]: procedures = 175, calls = 48, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 271 [2024-06-20 15:46:34,310 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:46:34,310 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:46:34,310 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:46:34,310 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:46:34,318 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:46:34" (1/1) ... [2024-06-20 15:46:34,319 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:46:34" (1/1) ... [2024-06-20 15:46:34,323 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:46:34" (1/1) ... [2024-06-20 15:46:34,351 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]. [2024-06-20 15:46:34,352 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:46:34" (1/1) ... [2024-06-20 15:46:34,352 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:46:34" (1/1) ... [2024-06-20 15:46:34,362 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:46:34" (1/1) ... [2024-06-20 15:46:34,377 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:46:34" (1/1) ... [2024-06-20 15:46:34,379 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:46:34" (1/1) ... [2024-06-20 15:46:34,381 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:46:34" (1/1) ... [2024-06-20 15:46:34,397 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:46:34,397 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:46:34,397 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:46:34,398 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:46:34,398 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:46:34" (1/1) ... [2024-06-20 15:46:34,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:46:34,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:46:34,431 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) [2024-06-20 15:46:34,449 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 [2024-06-20 15:46:34,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:46:34,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:46:34,463 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:46:34,463 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:46:34,464 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:46:34,464 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:46:34,464 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 15:46:34,464 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 15:46:34,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:46:34,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:46:34,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:46:34,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:46:34,466 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 15:46:34,561 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:46:34,563 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:46:34,947 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:46:34,947 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:46:35,214 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:46:35,215 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:46:35,215 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:46:35 BoogieIcfgContainer [2024-06-20 15:46:35,215 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:46:35,218 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:46:35,218 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:46:35,220 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:46:35,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:46:33" (1/4) ... [2024-06-20 15:46:35,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b2ca385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:46:35, skipping insertion in model container [2024-06-20 15:46:35,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:46:33" (2/4) ... [2024-06-20 15:46:35,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b2ca385 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:46:35, skipping insertion in model container [2024-06-20 15:46:35,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:46:34" (3/4) ... [2024-06-20 15:46:35,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b2ca385 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:46:35, skipping insertion in model container [2024-06-20 15:46:35,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:46:35" (4/4) ... [2024-06-20 15:46:35,223 INFO L112 eAbstractionObserver]: Analyzing ICFG mix006_tso.oepc.i [2024-06-20 15:46:35,236 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:46:35,236 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 15:46:35,236 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:46:35,282 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:46:35,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 15:46:35,338 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-20 15:46:35,338 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:46:35,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 15:46:35,341 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 15:46:35,344 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-20 15:46:35,355 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:46:35,361 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;@743e0b2a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:46:35,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 15:46:35,365 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:46:35,365 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 15:46:35,365 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:46:35,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:35,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:46:35,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:35,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:35,370 INFO L85 PathProgramCache]: Analyzing trace with hash 585193627, now seen corresponding path program 1 times [2024-06-20 15:46:35,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:35,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543955361] [2024-06-20 15:46:35,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:35,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:37,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:37,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543955361] [2024-06-20 15:46:37,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543955361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:37,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:37,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:46:37,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428515542] [2024-06-20 15:46:37,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:37,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:46:37,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:37,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:46:37,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:46:37,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:46:37,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:37,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:37,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:46:37,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:37,805 INFO L124 PetriNetUnfolderBase]: 1955/2965 cut-off events. [2024-06-20 15:46:37,806 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-06-20 15:46:37,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5969 conditions, 2965 events. 1955/2965 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14230 event pairs, 1404 based on Foata normal form. 1/2875 useless extension candidates. Maximal degree in co-relation 5957. Up to 2893 conditions per place. [2024-06-20 15:46:37,820 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-20 15:46:37,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 177 flow [2024-06-20 15:46:37,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:46:37,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:46:37,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-20 15:46:37,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-20 15:46:37,831 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-20 15:46:37,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 177 flow [2024-06-20 15:46:37,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:46:37,834 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-20 15:46:37,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-20 15:46:37,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-20 15:46:37,838 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-20 15:46:37,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:37,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:37,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:37,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:46:37,839 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:37,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:37,840 INFO L85 PathProgramCache]: Analyzing trace with hash -269615622, now seen corresponding path program 1 times [2024-06-20 15:46:37,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:37,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317194620] [2024-06-20 15:46:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:37,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:39,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:39,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317194620] [2024-06-20 15:46:39,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317194620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:39,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:39,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:46:39,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073338057] [2024-06-20 15:46:39,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:39,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:46:39,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:39,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:46:39,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:46:39,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 15:46:39,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:39,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:39,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 15:46:39,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:40,018 INFO L124 PetriNetUnfolderBase]: 2246/3319 cut-off events. [2024-06-20 15:46:40,019 INFO L125 PetriNetUnfolderBase]: For 621/621 co-relation queries the response was YES. [2024-06-20 15:46:40,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7534 conditions, 3319 events. 2246/3319 cut-off events. For 621/621 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15402 event pairs, 1443 based on Foata normal form. 3/3319 useless extension candidates. Maximal degree in co-relation 7522. Up to 3292 conditions per place. [2024-06-20 15:46:40,032 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-20 15:46:40,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 246 flow [2024-06-20 15:46:40,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:46:40,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:46:40,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-06-20 15:46:40,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-20 15:46:40,034 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 88 transitions. [2024-06-20 15:46:40,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 246 flow [2024-06-20 15:46:40,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:46:40,036 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-20 15:46:40,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-20 15:46:40,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-20 15:46:40,037 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-20 15:46:40,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:40,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:40,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:40,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:46:40,038 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:40,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:40,038 INFO L85 PathProgramCache]: Analyzing trace with hash 231851140, now seen corresponding path program 1 times [2024-06-20 15:46:40,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:40,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117942959] [2024-06-20 15:46:40,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:40,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:40,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:41,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:41,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117942959] [2024-06-20 15:46:41,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117942959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:41,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:41,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:46:41,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776198506] [2024-06-20 15:46:41,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:41,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:46:41,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:41,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:46:41,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:46:41,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 15:46:41,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:41,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:41,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 15:46:41,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:42,381 INFO L124 PetriNetUnfolderBase]: 2234/3301 cut-off events. [2024-06-20 15:46:42,382 INFO L125 PetriNetUnfolderBase]: For 1740/1740 co-relation queries the response was YES. [2024-06-20 15:46:42,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8266 conditions, 3301 events. 2234/3301 cut-off events. For 1740/1740 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15269 event pairs, 1059 based on Foata normal form. 6/3304 useless extension candidates. Maximal degree in co-relation 8252. Up to 3244 conditions per place. [2024-06-20 15:46:42,398 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 50 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-06-20 15:46:42,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 64 transitions, 328 flow [2024-06-20 15:46:42,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:46:42,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:46:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-06-20 15:46:42,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-20 15:46:42,400 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 108 transitions. [2024-06-20 15:46:42,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 64 transitions, 328 flow [2024-06-20 15:46:42,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 64 transitions, 314 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 15:46:42,402 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 174 flow [2024-06-20 15:46:42,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-20 15:46:42,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-20 15:46:42,403 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 174 flow [2024-06-20 15:46:42,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:42,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:42,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:42,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:46:42,404 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:42,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:42,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1184260269, now seen corresponding path program 1 times [2024-06-20 15:46:42,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:42,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134126638] [2024-06-20 15:46:42,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:42,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:44,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:44,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134126638] [2024-06-20 15:46:44,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134126638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:44,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:44,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:46:44,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489201322] [2024-06-20 15:46:44,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:44,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:46:44,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:44,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:46:44,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:46:44,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 15:46:44,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 174 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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) [2024-06-20 15:46:44,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:44,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 15:46:44,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:45,657 INFO L124 PetriNetUnfolderBase]: 2225/3286 cut-off events. [2024-06-20 15:46:45,657 INFO L125 PetriNetUnfolderBase]: For 3244/3244 co-relation queries the response was YES. [2024-06-20 15:46:45,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8980 conditions, 3286 events. 2225/3286 cut-off events. For 3244/3244 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15148 event pairs, 846 based on Foata normal form. 6/3289 useless extension candidates. Maximal degree in co-relation 8965. Up to 3199 conditions per place. [2024-06-20 15:46:45,671 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 54 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-20 15:46:45,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 70 transitions, 382 flow [2024-06-20 15:46:45,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:46:45,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:46:45,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-20 15:46:45,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-20 15:46:45,673 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 174 flow. Second operand 6 states and 123 transitions. [2024-06-20 15:46:45,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 70 transitions, 382 flow [2024-06-20 15:46:45,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 70 transitions, 358 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 15:46:45,675 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 193 flow [2024-06-20 15:46:45,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=193, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-06-20 15:46:45,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-20 15:46:45,676 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 193 flow [2024-06-20 15:46:45,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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) [2024-06-20 15:46:45,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:45,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:45,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:46:45,677 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:45,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:45,677 INFO L85 PathProgramCache]: Analyzing trace with hash -654356127, now seen corresponding path program 1 times [2024-06-20 15:46:45,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:45,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179328057] [2024-06-20 15:46:45,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:45,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:47,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:47,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:47,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179328057] [2024-06-20 15:46:47,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179328057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:47,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:47,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:46:47,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611690343] [2024-06-20 15:46:47,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:47,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:46:47,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:47,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:46:47,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:46:47,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 15:46:47,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 193 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:47,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:47,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 15:46:47,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:47,653 INFO L124 PetriNetUnfolderBase]: 1923/2928 cut-off events. [2024-06-20 15:46:47,653 INFO L125 PetriNetUnfolderBase]: For 4285/4285 co-relation queries the response was YES. [2024-06-20 15:46:47,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8425 conditions, 2928 events. 1923/2928 cut-off events. For 4285/4285 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14051 event pairs, 990 based on Foata normal form. 2/2891 useless extension candidates. Maximal degree in co-relation 8408. Up to 2835 conditions per place. [2024-06-20 15:46:47,667 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 45 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-20 15:46:47,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 57 transitions, 343 flow [2024-06-20 15:46:47,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:46:47,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:46:47,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-20 15:46:47,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-20 15:46:47,669 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 193 flow. Second operand 5 states and 87 transitions. [2024-06-20 15:46:47,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 57 transitions, 343 flow [2024-06-20 15:46:47,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 310 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 15:46:47,672 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 206 flow [2024-06-20 15:46:47,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-20 15:46:47,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-20 15:46:47,673 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 206 flow [2024-06-20 15:46:47,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:47,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:47,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:47,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:46:47,674 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:47,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:47,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1189797769, now seen corresponding path program 1 times [2024-06-20 15:46:47,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:47,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743130002] [2024-06-20 15:46:47,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:47,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:49,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:49,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:49,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743130002] [2024-06-20 15:46:49,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743130002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:49,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:49,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:46:49,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931224693] [2024-06-20 15:46:49,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:49,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:46:49,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:49,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:46:49,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:46:49,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 15:46:49,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 206 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:49,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:49,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 15:46:49,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:50,298 INFO L124 PetriNetUnfolderBase]: 1908/2921 cut-off events. [2024-06-20 15:46:50,298 INFO L125 PetriNetUnfolderBase]: For 6168/6168 co-relation queries the response was YES. [2024-06-20 15:46:50,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8931 conditions, 2921 events. 1908/2921 cut-off events. For 6168/6168 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14103 event pairs, 936 based on Foata normal form. 6/2914 useless extension candidates. Maximal degree in co-relation 8912. Up to 2787 conditions per place. [2024-06-20 15:46:50,318 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 51 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2024-06-20 15:46:50,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 66 transitions, 392 flow [2024-06-20 15:46:50,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:46:50,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:46:50,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-20 15:46:50,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-20 15:46:50,320 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 206 flow. Second operand 6 states and 104 transitions. [2024-06-20 15:46:50,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 66 transitions, 392 flow [2024-06-20 15:46:50,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 66 transitions, 370 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 15:46:50,324 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 240 flow [2024-06-20 15:46:50,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-20 15:46:50,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-20 15:46:50,326 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 240 flow [2024-06-20 15:46:50,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:50,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:50,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:50,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:46:50,327 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:50,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:50,327 INFO L85 PathProgramCache]: Analyzing trace with hash -590380446, now seen corresponding path program 1 times [2024-06-20 15:46:50,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:50,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171220965] [2024-06-20 15:46:50,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:50,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:51,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:51,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171220965] [2024-06-20 15:46:51,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171220965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:51,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:51,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:46:51,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673140891] [2024-06-20 15:46:51,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:51,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:46:51,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:51,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:46:51,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:46:51,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:46:51,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 240 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:51,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:51,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:46:51,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:52,777 INFO L124 PetriNetUnfolderBase]: 2216/3274 cut-off events. [2024-06-20 15:46:52,778 INFO L125 PetriNetUnfolderBase]: For 9378/9378 co-relation queries the response was YES. [2024-06-20 15:46:52,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10871 conditions, 3274 events. 2216/3274 cut-off events. For 9378/9378 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15079 event pairs, 1113 based on Foata normal form. 2/3273 useless extension candidates. Maximal degree in co-relation 10851. Up to 3238 conditions per place. [2024-06-20 15:46:52,790 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 56 selfloop transitions, 11 changer transitions 0/70 dead transitions. [2024-06-20 15:46:52,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 70 transitions, 442 flow [2024-06-20 15:46:52,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:46:52,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:46:52,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-20 15:46:52,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-20 15:46:52,793 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 240 flow. Second operand 6 states and 100 transitions. [2024-06-20 15:46:52,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 70 transitions, 442 flow [2024-06-20 15:46:52,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 410 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 15:46:52,797 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 266 flow [2024-06-20 15:46:52,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=266, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-20 15:46:52,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-20 15:46:52,798 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 266 flow [2024-06-20 15:46:52,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:52,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:52,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:52,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:46:52,799 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:52,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:52,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1770981504, now seen corresponding path program 2 times [2024-06-20 15:46:52,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:52,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401086127] [2024-06-20 15:46:52,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:52,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:54,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:54,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401086127] [2024-06-20 15:46:54,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401086127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:54,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:54,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:46:54,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052464350] [2024-06-20 15:46:54,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:54,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:46:54,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:54,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:46:54,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:46:54,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:46:54,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 266 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:54,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:54,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:46:54,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:55,088 INFO L124 PetriNetUnfolderBase]: 2211/3269 cut-off events. [2024-06-20 15:46:55,089 INFO L125 PetriNetUnfolderBase]: For 12136/12148 co-relation queries the response was YES. [2024-06-20 15:46:55,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11500 conditions, 3269 events. 2211/3269 cut-off events. For 12136/12148 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15087 event pairs, 1120 based on Foata normal form. 10/3274 useless extension candidates. Maximal degree in co-relation 11479. Up to 3213 conditions per place. [2024-06-20 15:46:55,102 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 51 selfloop transitions, 16 changer transitions 0/70 dead transitions. [2024-06-20 15:46:55,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 70 transitions, 466 flow [2024-06-20 15:46:55,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:46:55,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:46:55,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-20 15:46:55,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 15:46:55,106 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 266 flow. Second operand 6 states and 99 transitions. [2024-06-20 15:46:55,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 70 transitions, 466 flow [2024-06-20 15:46:55,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 70 transitions, 432 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 15:46:55,110 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 306 flow [2024-06-20 15:46:55,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=306, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-20 15:46:55,110 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-20 15:46:55,110 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 306 flow [2024-06-20 15:46:55,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:55,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:55,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:55,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:46:55,111 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:55,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:55,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1744106578, now seen corresponding path program 1 times [2024-06-20 15:46:55,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:55,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227876467] [2024-06-20 15:46:55,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:55,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:56,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:56,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227876467] [2024-06-20 15:46:56,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227876467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:56,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:56,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:46:56,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724292720] [2024-06-20 15:46:56,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:56,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:46:56,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:56,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:46:56,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:46:56,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:46:56,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 306 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:56,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:56,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:46:56,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:57,557 INFO L124 PetriNetUnfolderBase]: 2281/3377 cut-off events. [2024-06-20 15:46:57,557 INFO L125 PetriNetUnfolderBase]: For 15815/15819 co-relation queries the response was YES. [2024-06-20 15:46:57,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12585 conditions, 3377 events. 2281/3377 cut-off events. For 15815/15819 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15573 event pairs, 945 based on Foata normal form. 8/3382 useless extension candidates. Maximal degree in co-relation 12563. Up to 3258 conditions per place. [2024-06-20 15:46:57,571 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 71 selfloop transitions, 24 changer transitions 0/98 dead transitions. [2024-06-20 15:46:57,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 98 transitions, 652 flow [2024-06-20 15:46:57,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:46:57,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:46:57,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 15:46:57,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 15:46:57,572 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 306 flow. Second operand 8 states and 135 transitions. [2024-06-20 15:46:57,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 98 transitions, 652 flow [2024-06-20 15:46:57,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 98 transitions, 596 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 15:46:57,579 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 421 flow [2024-06-20 15:46:57,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=421, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2024-06-20 15:46:57,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-20 15:46:57,579 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 421 flow [2024-06-20 15:46:57,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:57,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:57,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:57,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:46:57,580 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:57,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:57,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1122043572, now seen corresponding path program 2 times [2024-06-20 15:46:57,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:57,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146134284] [2024-06-20 15:46:57,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:57,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:58,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:58,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146134284] [2024-06-20 15:46:58,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146134284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:58,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:58,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:46:58,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815622949] [2024-06-20 15:46:58,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:58,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:46:58,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:58,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:46:58,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:46:58,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:46:58,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 421 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:58,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:58,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:46:58,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:59,881 INFO L124 PetriNetUnfolderBase]: 2303/3409 cut-off events. [2024-06-20 15:46:59,881 INFO L125 PetriNetUnfolderBase]: For 20126/20132 co-relation queries the response was YES. [2024-06-20 15:46:59,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13820 conditions, 3409 events. 2303/3409 cut-off events. For 20126/20132 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15709 event pairs, 924 based on Foata normal form. 10/3416 useless extension candidates. Maximal degree in co-relation 13794. Up to 3267 conditions per place. [2024-06-20 15:46:59,897 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 69 selfloop transitions, 31 changer transitions 0/103 dead transitions. [2024-06-20 15:46:59,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 103 transitions, 775 flow [2024-06-20 15:46:59,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:46:59,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:46:59,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 15:46:59,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 15:46:59,899 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 421 flow. Second operand 7 states and 119 transitions. [2024-06-20 15:46:59,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 103 transitions, 775 flow [2024-06-20 15:46:59,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 103 transitions, 724 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-20 15:46:59,906 INFO L231 Difference]: Finished difference. Result has 71 places, 77 transitions, 531 flow [2024-06-20 15:46:59,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=531, PETRI_PLACES=71, PETRI_TRANSITIONS=77} [2024-06-20 15:46:59,907 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-20 15:46:59,907 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 77 transitions, 531 flow [2024-06-20 15:46:59,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:59,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:59,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:59,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:46:59,908 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:59,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:59,908 INFO L85 PathProgramCache]: Analyzing trace with hash 757017930, now seen corresponding path program 1 times [2024-06-20 15:46:59,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:59,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335164114] [2024-06-20 15:46:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:59,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:01,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:01,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335164114] [2024-06-20 15:47:01,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335164114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:01,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:01,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:47:01,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931131603] [2024-06-20 15:47:01,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:01,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:47:01,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:01,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:47:01,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:47:01,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:47:01,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 77 transitions, 531 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:01,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:01,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:47:01,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:02,819 INFO L124 PetriNetUnfolderBase]: 2325/3441 cut-off events. [2024-06-20 15:47:02,820 INFO L125 PetriNetUnfolderBase]: For 25278/25286 co-relation queries the response was YES. [2024-06-20 15:47:02,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14929 conditions, 3441 events. 2325/3441 cut-off events. For 25278/25286 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15827 event pairs, 920 based on Foata normal form. 12/3450 useless extension candidates. Maximal degree in co-relation 14901. Up to 3371 conditions per place. [2024-06-20 15:47:02,872 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 84 selfloop transitions, 17 changer transitions 0/104 dead transitions. [2024-06-20 15:47:02,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 104 transitions, 843 flow [2024-06-20 15:47:02,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:47:02,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:47:02,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 15:47:02,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-20 15:47:02,873 INFO L175 Difference]: Start difference. First operand has 71 places, 77 transitions, 531 flow. Second operand 7 states and 115 transitions. [2024-06-20 15:47:02,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 104 transitions, 843 flow [2024-06-20 15:47:02,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 104 transitions, 777 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-20 15:47:02,898 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 545 flow [2024-06-20 15:47:02,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=545, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-20 15:47:02,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-20 15:47:02,899 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 545 flow [2024-06-20 15:47:02,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:02,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:02,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:02,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:47:02,900 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:02,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:02,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1784810766, now seen corresponding path program 3 times [2024-06-20 15:47:02,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:02,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436396952] [2024-06-20 15:47:02,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:02,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:04,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:04,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436396952] [2024-06-20 15:47:04,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436396952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:04,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:04,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:47:04,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688363057] [2024-06-20 15:47:04,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:04,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:47:04,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:04,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:47:04,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:47:04,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:47:04,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 545 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:04,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:04,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:47:04,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:05,620 INFO L124 PetriNetUnfolderBase]: 2363/3497 cut-off events. [2024-06-20 15:47:05,620 INFO L125 PetriNetUnfolderBase]: For 25192/25192 co-relation queries the response was YES. [2024-06-20 15:47:05,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14993 conditions, 3497 events. 2363/3497 cut-off events. For 25192/25192 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16115 event pairs, 910 based on Foata normal form. 4/3498 useless extension candidates. Maximal degree in co-relation 14964. Up to 3306 conditions per place. [2024-06-20 15:47:05,652 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 72 selfloop transitions, 36 changer transitions 0/111 dead transitions. [2024-06-20 15:47:05,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 111 transitions, 953 flow [2024-06-20 15:47:05,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:47:05,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:47:05,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 15:47:05,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-20 15:47:05,657 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 545 flow. Second operand 7 states and 121 transitions. [2024-06-20 15:47:05,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 111 transitions, 953 flow [2024-06-20 15:47:05,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 111 transitions, 899 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 15:47:05,674 INFO L231 Difference]: Finished difference. Result has 77 places, 86 transitions, 653 flow [2024-06-20 15:47:05,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=653, PETRI_PLACES=77, PETRI_TRANSITIONS=86} [2024-06-20 15:47:05,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-20 15:47:05,677 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 86 transitions, 653 flow [2024-06-20 15:47:05,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:05,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:05,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:05,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:47:05,677 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:05,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:05,678 INFO L85 PathProgramCache]: Analyzing trace with hash 934386600, now seen corresponding path program 2 times [2024-06-20 15:47:05,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:05,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128276399] [2024-06-20 15:47:05,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:05,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:07,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:07,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128276399] [2024-06-20 15:47:07,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128276399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:07,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:07,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:47:07,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831455437] [2024-06-20 15:47:07,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:07,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:47:07,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:07,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:47:07,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:47:07,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:47:07,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 86 transitions, 653 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:07,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:07,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:47:07,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:08,572 INFO L124 PetriNetUnfolderBase]: 2385/3529 cut-off events. [2024-06-20 15:47:08,573 INFO L125 PetriNetUnfolderBase]: For 30658/30682 co-relation queries the response was YES. [2024-06-20 15:47:08,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15914 conditions, 3529 events. 2385/3529 cut-off events. For 30658/30682 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16328 event pairs, 844 based on Foata normal form. 20/3542 useless extension candidates. Maximal degree in co-relation 15884. Up to 3375 conditions per place. [2024-06-20 15:47:08,590 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 87 selfloop transitions, 29 changer transitions 0/119 dead transitions. [2024-06-20 15:47:08,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 119 transitions, 1091 flow [2024-06-20 15:47:08,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:47:08,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:47:08,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 15:47:08,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-20 15:47:08,592 INFO L175 Difference]: Start difference. First operand has 77 places, 86 transitions, 653 flow. Second operand 7 states and 118 transitions. [2024-06-20 15:47:08,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 119 transitions, 1091 flow [2024-06-20 15:47:08,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 119 transitions, 1036 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-20 15:47:08,607 INFO L231 Difference]: Finished difference. Result has 82 places, 94 transitions, 769 flow [2024-06-20 15:47:08,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=769, PETRI_PLACES=82, PETRI_TRANSITIONS=94} [2024-06-20 15:47:08,608 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-20 15:47:08,608 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 94 transitions, 769 flow [2024-06-20 15:47:08,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:08,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:08,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:08,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:47:08,609 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:08,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:08,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1117281972, now seen corresponding path program 4 times [2024-06-20 15:47:08,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:08,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273695044] [2024-06-20 15:47:08,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:08,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:10,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:10,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273695044] [2024-06-20 15:47:10,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273695044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:10,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:10,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:47:10,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298826655] [2024-06-20 15:47:10,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:10,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:47:10,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:10,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:47:10,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:47:10,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:47:10,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 94 transitions, 769 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:10,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:10,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:47:10,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:11,048 INFO L124 PetriNetUnfolderBase]: 2375/3518 cut-off events. [2024-06-20 15:47:11,049 INFO L125 PetriNetUnfolderBase]: For 35099/35114 co-relation queries the response was YES. [2024-06-20 15:47:11,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16621 conditions, 3518 events. 2375/3518 cut-off events. For 35099/35114 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16303 event pairs, 893 based on Foata normal form. 10/3515 useless extension candidates. Maximal degree in co-relation 16588. Up to 3288 conditions per place. [2024-06-20 15:47:11,067 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 74 selfloop transitions, 43 changer transitions 0/120 dead transitions. [2024-06-20 15:47:11,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 120 transitions, 1167 flow [2024-06-20 15:47:11,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:47:11,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:47:11,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 15:47:11,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-20 15:47:11,068 INFO L175 Difference]: Start difference. First operand has 82 places, 94 transitions, 769 flow. Second operand 7 states and 120 transitions. [2024-06-20 15:47:11,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 120 transitions, 1167 flow [2024-06-20 15:47:11,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 120 transitions, 1111 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-20 15:47:11,098 INFO L231 Difference]: Finished difference. Result has 86 places, 97 transitions, 859 flow [2024-06-20 15:47:11,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=859, PETRI_PLACES=86, PETRI_TRANSITIONS=97} [2024-06-20 15:47:11,098 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-20 15:47:11,099 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 97 transitions, 859 flow [2024-06-20 15:47:11,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:11,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:11,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:11,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:47:11,099 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:11,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:11,100 INFO L85 PathProgramCache]: Analyzing trace with hash 934149450, now seen corresponding path program 3 times [2024-06-20 15:47:11,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:11,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082211519] [2024-06-20 15:47:11,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:11,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:12,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:12,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082211519] [2024-06-20 15:47:12,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082211519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:12,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:12,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:47:12,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540638596] [2024-06-20 15:47:12,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:12,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:47:12,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:12,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:47:12,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:47:13,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:47:13,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 97 transitions, 859 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:13,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:13,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:47:13,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:13,786 INFO L124 PetriNetUnfolderBase]: 2376/3517 cut-off events. [2024-06-20 15:47:13,787 INFO L125 PetriNetUnfolderBase]: For 40418/40442 co-relation queries the response was YES. [2024-06-20 15:47:13,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17356 conditions, 3517 events. 2376/3517 cut-off events. For 40418/40442 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16315 event pairs, 878 based on Foata normal form. 22/3532 useless extension candidates. Maximal degree in co-relation 17321. Up to 3419 conditions per place. [2024-06-20 15:47:13,806 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 96 selfloop transitions, 24 changer transitions 0/123 dead transitions. [2024-06-20 15:47:13,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 123 transitions, 1222 flow [2024-06-20 15:47:13,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:47:13,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:47:13,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 15:47:13,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-20 15:47:13,808 INFO L175 Difference]: Start difference. First operand has 86 places, 97 transitions, 859 flow. Second operand 7 states and 115 transitions. [2024-06-20 15:47:13,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 123 transitions, 1222 flow [2024-06-20 15:47:13,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 123 transitions, 1078 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 15:47:13,833 INFO L231 Difference]: Finished difference. Result has 88 places, 100 transitions, 823 flow [2024-06-20 15:47:13,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=823, PETRI_PLACES=88, PETRI_TRANSITIONS=100} [2024-06-20 15:47:13,833 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-20 15:47:13,834 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 100 transitions, 823 flow [2024-06-20 15:47:13,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:13,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:13,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:13,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:47:13,834 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:13,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:13,835 INFO L85 PathProgramCache]: Analyzing trace with hash 434834212, now seen corresponding path program 1 times [2024-06-20 15:47:13,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:13,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737214937] [2024-06-20 15:47:13,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:13,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:15,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:15,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:15,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737214937] [2024-06-20 15:47:15,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737214937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:15,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:15,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:47:15,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011510547] [2024-06-20 15:47:15,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:15,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:47:15,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:15,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:47:15,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:47:15,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 15:47:15,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 100 transitions, 823 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:15,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:15,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 15:47:15,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:16,082 INFO L124 PetriNetUnfolderBase]: 2076/3203 cut-off events. [2024-06-20 15:47:16,082 INFO L125 PetriNetUnfolderBase]: For 36585/36585 co-relation queries the response was YES. [2024-06-20 15:47:16,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15899 conditions, 3203 events. 2076/3203 cut-off events. For 36585/36585 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15515 event pairs, 752 based on Foata normal form. 1/3201 useless extension candidates. Maximal degree in co-relation 15863. Up to 3068 conditions per place. [2024-06-20 15:47:16,100 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 99 selfloop transitions, 8 changer transitions 0/111 dead transitions. [2024-06-20 15:47:16,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 111 transitions, 1081 flow [2024-06-20 15:47:16,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:47:16,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:47:16,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-20 15:47:16,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-20 15:47:16,102 INFO L175 Difference]: Start difference. First operand has 88 places, 100 transitions, 823 flow. Second operand 5 states and 83 transitions. [2024-06-20 15:47:16,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 111 transitions, 1081 flow [2024-06-20 15:47:16,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 111 transitions, 1007 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 15:47:16,123 INFO L231 Difference]: Finished difference. Result has 88 places, 103 transitions, 797 flow [2024-06-20 15:47:16,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=797, PETRI_PLACES=88, PETRI_TRANSITIONS=103} [2024-06-20 15:47:16,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-20 15:47:16,124 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 103 transitions, 797 flow [2024-06-20 15:47:16,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:16,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:16,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:16,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:47:16,125 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:16,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:16,125 INFO L85 PathProgramCache]: Analyzing trace with hash -423701503, now seen corresponding path program 1 times [2024-06-20 15:47:16,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:16,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696658782] [2024-06-20 15:47:16,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:16,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:17,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:17,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696658782] [2024-06-20 15:47:17,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696658782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:17,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:17,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:17,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999624235] [2024-06-20 15:47:17,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:17,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:17,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:17,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:17,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:18,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:47:18,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 103 transitions, 797 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:18,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:18,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:47:18,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:19,086 INFO L124 PetriNetUnfolderBase]: 2368/3505 cut-off events. [2024-06-20 15:47:19,087 INFO L125 PetriNetUnfolderBase]: For 45863/45869 co-relation queries the response was YES. [2024-06-20 15:47:19,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18229 conditions, 3505 events. 2368/3505 cut-off events. For 45863/45869 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16240 event pairs, 871 based on Foata normal form. 8/3510 useless extension candidates. Maximal degree in co-relation 18192. Up to 3349 conditions per place. [2024-06-20 15:47:19,106 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 94 selfloop transitions, 32 changer transitions 0/129 dead transitions. [2024-06-20 15:47:19,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 129 transitions, 1135 flow [2024-06-20 15:47:19,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:47:19,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:47:19,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 15:47:19,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 15:47:19,109 INFO L175 Difference]: Start difference. First operand has 88 places, 103 transitions, 797 flow. Second operand 7 states and 119 transitions. [2024-06-20 15:47:19,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 129 transitions, 1135 flow [2024-06-20 15:47:19,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 129 transitions, 1087 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-20 15:47:19,134 INFO L231 Difference]: Finished difference. Result has 92 places, 103 transitions, 831 flow [2024-06-20 15:47:19,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=831, PETRI_PLACES=92, PETRI_TRANSITIONS=103} [2024-06-20 15:47:19,135 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-20 15:47:19,135 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 103 transitions, 831 flow [2024-06-20 15:47:19,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:19,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:19,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:19,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:47:19,136 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:19,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:19,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1992570660, now seen corresponding path program 1 times [2024-06-20 15:47:19,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:19,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039134323] [2024-06-20 15:47:19,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:19,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:20,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:20,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039134323] [2024-06-20 15:47:20,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039134323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:20,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:20,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:20,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521587335] [2024-06-20 15:47:20,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:20,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:20,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:20,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:20,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:20,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:47:20,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 103 transitions, 831 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:20,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:20,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:47:20,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:21,817 INFO L124 PetriNetUnfolderBase]: 2412/3569 cut-off events. [2024-06-20 15:47:21,817 INFO L125 PetriNetUnfolderBase]: For 52627/52633 co-relation queries the response was YES. [2024-06-20 15:47:21,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18985 conditions, 3569 events. 2412/3569 cut-off events. For 52627/52633 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16553 event pairs, 850 based on Foata normal form. 14/3580 useless extension candidates. Maximal degree in co-relation 18947. Up to 3371 conditions per place. [2024-06-20 15:47:21,833 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 101 selfloop transitions, 34 changer transitions 0/138 dead transitions. [2024-06-20 15:47:21,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 138 transitions, 1251 flow [2024-06-20 15:47:21,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:21,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:21,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 15:47:21,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 15:47:21,839 INFO L175 Difference]: Start difference. First operand has 92 places, 103 transitions, 831 flow. Second operand 8 states and 135 transitions. [2024-06-20 15:47:21,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 138 transitions, 1251 flow [2024-06-20 15:47:21,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 138 transitions, 1178 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:47:21,859 INFO L231 Difference]: Finished difference. Result has 94 places, 106 transitions, 887 flow [2024-06-20 15:47:21,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=887, PETRI_PLACES=94, PETRI_TRANSITIONS=106} [2024-06-20 15:47:21,861 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-20 15:47:21,861 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 106 transitions, 887 flow [2024-06-20 15:47:21,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:21,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:21,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:21,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:47:21,861 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:21,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:21,862 INFO L85 PathProgramCache]: Analyzing trace with hash -419892068, now seen corresponding path program 2 times [2024-06-20 15:47:21,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:21,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199261426] [2024-06-20 15:47:21,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:21,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:23,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:23,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199261426] [2024-06-20 15:47:23,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199261426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:23,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:23,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:23,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913447702] [2024-06-20 15:47:23,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:23,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:23,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:23,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:23,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:23,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:47:23,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 106 transitions, 887 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:23,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:23,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:47:23,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:24,862 INFO L124 PetriNetUnfolderBase]: 2456/3634 cut-off events. [2024-06-20 15:47:24,863 INFO L125 PetriNetUnfolderBase]: For 59620/59620 co-relation queries the response was YES. [2024-06-20 15:47:24,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20067 conditions, 3634 events. 2456/3634 cut-off events. For 59620/59620 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16826 event pairs, 858 based on Foata normal form. 8/3639 useless extension candidates. Maximal degree in co-relation 20028. Up to 3399 conditions per place. [2024-06-20 15:47:24,882 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 96 selfloop transitions, 39 changer transitions 0/138 dead transitions. [2024-06-20 15:47:24,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 138 transitions, 1299 flow [2024-06-20 15:47:24,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:24,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:24,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 15:47:24,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 15:47:24,884 INFO L175 Difference]: Start difference. First operand has 94 places, 106 transitions, 887 flow. Second operand 8 states and 135 transitions. [2024-06-20 15:47:24,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 138 transitions, 1299 flow [2024-06-20 15:47:24,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 138 transitions, 1196 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 15:47:24,912 INFO L231 Difference]: Finished difference. Result has 96 places, 109 transitions, 928 flow [2024-06-20 15:47:24,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=928, PETRI_PLACES=96, PETRI_TRANSITIONS=109} [2024-06-20 15:47:24,912 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-20 15:47:24,912 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 109 transitions, 928 flow [2024-06-20 15:47:24,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:24,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:24,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:24,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:47:24,913 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:24,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:24,913 INFO L85 PathProgramCache]: Analyzing trace with hash -419886488, now seen corresponding path program 3 times [2024-06-20 15:47:24,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:24,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268138405] [2024-06-20 15:47:24,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:24,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:26,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:26,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:26,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268138405] [2024-06-20 15:47:26,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268138405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:26,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:26,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:26,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547783566] [2024-06-20 15:47:26,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:26,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:26,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:26,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:26,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:26,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:47:26,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 109 transitions, 928 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:26,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:26,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:47:26,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:28,013 INFO L124 PetriNetUnfolderBase]: 2576/3808 cut-off events. [2024-06-20 15:47:28,014 INFO L125 PetriNetUnfolderBase]: For 70129/70135 co-relation queries the response was YES. [2024-06-20 15:47:28,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21805 conditions, 3808 events. 2576/3808 cut-off events. For 70129/70135 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17788 event pairs, 874 based on Foata normal form. 18/3823 useless extension candidates. Maximal degree in co-relation 21765. Up to 3630 conditions per place. [2024-06-20 15:47:28,037 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 123 selfloop transitions, 24 changer transitions 0/150 dead transitions. [2024-06-20 15:47:28,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 150 transitions, 1528 flow [2024-06-20 15:47:28,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:28,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:28,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 15:47:28,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-20 15:47:28,041 INFO L175 Difference]: Start difference. First operand has 96 places, 109 transitions, 928 flow. Second operand 8 states and 137 transitions. [2024-06-20 15:47:28,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 150 transitions, 1528 flow [2024-06-20 15:47:28,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 150 transitions, 1408 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 15:47:28,078 INFO L231 Difference]: Finished difference. Result has 99 places, 117 transitions, 1016 flow [2024-06-20 15:47:28,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1016, PETRI_PLACES=99, PETRI_TRANSITIONS=117} [2024-06-20 15:47:28,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-20 15:47:28,078 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 117 transitions, 1016 flow [2024-06-20 15:47:28,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:28,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:28,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:28,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:47:28,079 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:28,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:28,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1106142662, now seen corresponding path program 4 times [2024-06-20 15:47:28,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:28,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682618183] [2024-06-20 15:47:28,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:28,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:30,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:30,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682618183] [2024-06-20 15:47:30,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682618183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:30,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:30,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:30,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208371714] [2024-06-20 15:47:30,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:30,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:30,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:30,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:30,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:30,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:47:30,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 117 transitions, 1016 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:30,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:30,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:47:30,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:31,380 INFO L124 PetriNetUnfolderBase]: 2716/4014 cut-off events. [2024-06-20 15:47:31,381 INFO L125 PetriNetUnfolderBase]: For 83838/83853 co-relation queries the response was YES. [2024-06-20 15:47:31,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24251 conditions, 4014 events. 2716/4014 cut-off events. For 83838/83853 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 18934 event pairs, 749 based on Foata normal form. 14/4015 useless extension candidates. Maximal degree in co-relation 24209. Up to 3203 conditions per place. [2024-06-20 15:47:31,405 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 94 selfloop transitions, 73 changer transitions 0/170 dead transitions. [2024-06-20 15:47:31,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 170 transitions, 1969 flow [2024-06-20 15:47:31,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:31,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:31,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 15:47:31,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-20 15:47:31,414 INFO L175 Difference]: Start difference. First operand has 99 places, 117 transitions, 1016 flow. Second operand 8 states and 151 transitions. [2024-06-20 15:47:31,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 170 transitions, 1969 flow [2024-06-20 15:47:31,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 170 transitions, 1891 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-20 15:47:31,447 INFO L231 Difference]: Finished difference. Result has 105 places, 131 transitions, 1406 flow [2024-06-20 15:47:31,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1406, PETRI_PLACES=105, PETRI_TRANSITIONS=131} [2024-06-20 15:47:31,448 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-20 15:47:31,448 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 131 transitions, 1406 flow [2024-06-20 15:47:31,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:31,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:31,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:31,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:47:31,449 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:31,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:31,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1106137082, now seen corresponding path program 5 times [2024-06-20 15:47:31,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:31,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630759176] [2024-06-20 15:47:31,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:31,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:33,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:33,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630759176] [2024-06-20 15:47:33,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630759176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:33,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:33,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:33,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730687372] [2024-06-20 15:47:33,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:33,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:33,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:33,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:33,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:33,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:47:33,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 131 transitions, 1406 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:33,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:33,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:47:33,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:34,603 INFO L124 PetriNetUnfolderBase]: 2814/4153 cut-off events. [2024-06-20 15:47:34,604 INFO L125 PetriNetUnfolderBase]: For 98403/98427 co-relation queries the response was YES. [2024-06-20 15:47:34,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26723 conditions, 4153 events. 2814/4153 cut-off events. For 98403/98427 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 19627 event pairs, 876 based on Foata normal form. 28/4174 useless extension candidates. Maximal degree in co-relation 26677. Up to 3962 conditions per place. [2024-06-20 15:47:34,634 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 136 selfloop transitions, 31 changer transitions 0/170 dead transitions. [2024-06-20 15:47:34,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 170 transitions, 2077 flow [2024-06-20 15:47:34,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:34,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:34,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 15:47:34,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 15:47:34,636 INFO L175 Difference]: Start difference. First operand has 105 places, 131 transitions, 1406 flow. Second operand 8 states and 136 transitions. [2024-06-20 15:47:34,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 170 transitions, 2077 flow [2024-06-20 15:47:34,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 170 transitions, 1942 flow, removed 57 selfloop flow, removed 2 redundant places. [2024-06-20 15:47:34,704 INFO L231 Difference]: Finished difference. Result has 112 places, 138 transitions, 1521 flow [2024-06-20 15:47:34,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1295, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1521, PETRI_PLACES=112, PETRI_TRANSITIONS=138} [2024-06-20 15:47:34,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-20 15:47:34,705 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 138 transitions, 1521 flow [2024-06-20 15:47:34,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:34,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:34,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:34,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:47:34,706 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:34,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:34,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1105935272, now seen corresponding path program 6 times [2024-06-20 15:47:34,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:34,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490048695] [2024-06-20 15:47:34,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:34,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:34,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:36,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:36,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490048695] [2024-06-20 15:47:36,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490048695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:36,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:36,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:36,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84692041] [2024-06-20 15:47:36,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:36,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:36,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:36,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:36,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:36,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:47:36,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 138 transitions, 1521 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:36,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:36,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:47:36,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:37,735 INFO L124 PetriNetUnfolderBase]: 2822/4167 cut-off events. [2024-06-20 15:47:37,736 INFO L125 PetriNetUnfolderBase]: For 99300/99324 co-relation queries the response was YES. [2024-06-20 15:47:37,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26519 conditions, 4167 events. 2822/4167 cut-off events. For 99300/99324 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 19724 event pairs, 823 based on Foata normal form. 28/4188 useless extension candidates. Maximal degree in co-relation 26470. Up to 3687 conditions per place. [2024-06-20 15:47:37,760 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 124 selfloop transitions, 49 changer transitions 0/176 dead transitions. [2024-06-20 15:47:37,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 176 transitions, 2204 flow [2024-06-20 15:47:37,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:37,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:37,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 15:47:37,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-20 15:47:37,762 INFO L175 Difference]: Start difference. First operand has 112 places, 138 transitions, 1521 flow. Second operand 8 states and 143 transitions. [2024-06-20 15:47:37,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 176 transitions, 2204 flow [2024-06-20 15:47:37,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 176 transitions, 2062 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-20 15:47:37,829 INFO L231 Difference]: Finished difference. Result has 116 places, 141 transitions, 1567 flow [2024-06-20 15:47:37,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1567, PETRI_PLACES=116, PETRI_TRANSITIONS=141} [2024-06-20 15:47:37,830 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-20 15:47:37,830 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 141 transitions, 1567 flow [2024-06-20 15:47:37,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:37,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:37,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:37,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:47:37,831 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:37,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:37,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1098508385, now seen corresponding path program 1 times [2024-06-20 15:47:37,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:37,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494869608] [2024-06-20 15:47:37,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:37,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:37,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:40,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:40,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494869608] [2024-06-20 15:47:40,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494869608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:40,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:40,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:47:40,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861771017] [2024-06-20 15:47:40,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:40,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:47:40,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:40,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:47:40,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:47:40,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 15:47:40,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 141 transitions, 1567 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:40,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:40,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 15:47:40,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:41,794 INFO L124 PetriNetUnfolderBase]: 2517/3828 cut-off events. [2024-06-20 15:47:41,794 INFO L125 PetriNetUnfolderBase]: For 88420/88420 co-relation queries the response was YES. [2024-06-20 15:47:41,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23952 conditions, 3828 events. 2517/3828 cut-off events. For 88420/88420 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 18729 event pairs, 722 based on Foata normal form. 4/3829 useless extension candidates. Maximal degree in co-relation 23901. Up to 3659 conditions per place. [2024-06-20 15:47:41,821 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 152 selfloop transitions, 19 changer transitions 0/175 dead transitions. [2024-06-20 15:47:41,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 175 transitions, 2073 flow [2024-06-20 15:47:41,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:47:41,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:47:41,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 15:47:41,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 15:47:41,823 INFO L175 Difference]: Start difference. First operand has 116 places, 141 transitions, 1567 flow. Second operand 9 states and 147 transitions. [2024-06-20 15:47:41,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 175 transitions, 2073 flow [2024-06-20 15:47:41,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 175 transitions, 1953 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 15:47:41,896 INFO L231 Difference]: Finished difference. Result has 121 places, 147 transitions, 1588 flow [2024-06-20 15:47:41,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1450, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1588, PETRI_PLACES=121, PETRI_TRANSITIONS=147} [2024-06-20 15:47:41,897 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-20 15:47:41,897 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 147 transitions, 1588 flow [2024-06-20 15:47:41,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:41,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:41,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:41,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:47:41,899 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:41,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:41,899 INFO L85 PathProgramCache]: Analyzing trace with hash 625347097, now seen corresponding path program 1 times [2024-06-20 15:47:41,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:41,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540228547] [2024-06-20 15:47:41,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:41,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:43,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:43,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540228547] [2024-06-20 15:47:43,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540228547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:43,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:43,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:47:43,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933740355] [2024-06-20 15:47:43,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:43,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:47:43,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:43,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:47:43,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:47:43,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 15:47:43,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 147 transitions, 1588 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:43,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:43,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 15:47:43,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:44,544 INFO L124 PetriNetUnfolderBase]: 2511/3820 cut-off events. [2024-06-20 15:47:44,545 INFO L125 PetriNetUnfolderBase]: For 92404/92404 co-relation queries the response was YES. [2024-06-20 15:47:44,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24124 conditions, 3820 events. 2511/3820 cut-off events. For 92404/92404 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 18607 event pairs, 735 based on Foata normal form. 2/3819 useless extension candidates. Maximal degree in co-relation 24070. Up to 3696 conditions per place. [2024-06-20 15:47:44,573 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 145 selfloop transitions, 11 changer transitions 0/160 dead transitions. [2024-06-20 15:47:44,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 160 transitions, 1954 flow [2024-06-20 15:47:44,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:47:44,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:47:44,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-20 15:47:44,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 15:47:44,576 INFO L175 Difference]: Start difference. First operand has 121 places, 147 transitions, 1588 flow. Second operand 6 states and 96 transitions. [2024-06-20 15:47:44,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 160 transitions, 1954 flow [2024-06-20 15:47:44,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 160 transitions, 1861 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 15:47:44,727 INFO L231 Difference]: Finished difference. Result has 121 places, 150 transitions, 1555 flow [2024-06-20 15:47:44,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1555, PETRI_PLACES=121, PETRI_TRANSITIONS=150} [2024-06-20 15:47:44,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-20 15:47:44,728 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 150 transitions, 1555 flow [2024-06-20 15:47:44,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:44,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:44,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:44,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:47:44,729 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:44,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:44,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1526465133, now seen corresponding path program 1 times [2024-06-20 15:47:44,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:44,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944708980] [2024-06-20 15:47:44,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:44,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:46,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:46,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:46,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944708980] [2024-06-20 15:47:46,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944708980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:46,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:46,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:47:46,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283143542] [2024-06-20 15:47:46,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:46,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:47:46,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:46,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:47:46,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:47:46,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:47:46,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 150 transitions, 1555 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:46,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:46,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:47:46,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:47,914 INFO L124 PetriNetUnfolderBase]: 2822/4169 cut-off events. [2024-06-20 15:47:47,914 INFO L125 PetriNetUnfolderBase]: For 112831/112837 co-relation queries the response was YES. [2024-06-20 15:47:47,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27250 conditions, 4169 events. 2822/4169 cut-off events. For 112831/112837 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19707 event pairs, 633 based on Foata normal form. 10/4176 useless extension candidates. Maximal degree in co-relation 27196. Up to 4009 conditions per place. [2024-06-20 15:47:47,944 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 153 selfloop transitions, 27 changer transitions 0/183 dead transitions. [2024-06-20 15:47:47,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 183 transitions, 2065 flow [2024-06-20 15:47:47,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:47,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:47,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 15:47:47,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 15:47:47,945 INFO L175 Difference]: Start difference. First operand has 121 places, 150 transitions, 1555 flow. Second operand 8 states and 132 transitions. [2024-06-20 15:47:47,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 183 transitions, 2065 flow [2024-06-20 15:47:48,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 183 transitions, 2027 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 15:47:48,030 INFO L231 Difference]: Finished difference. Result has 125 places, 152 transitions, 1634 flow [2024-06-20 15:47:48,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1517, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1634, PETRI_PLACES=125, PETRI_TRANSITIONS=152} [2024-06-20 15:47:48,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-20 15:47:48,031 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 152 transitions, 1634 flow [2024-06-20 15:47:48,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:48,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:48,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:48,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:47:48,032 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:48,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:48,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1526525583, now seen corresponding path program 2 times [2024-06-20 15:47:48,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:48,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609165165] [2024-06-20 15:47:48,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:48,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:48,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:50,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:50,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609165165] [2024-06-20 15:47:50,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609165165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:50,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:50,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:47:50,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505026523] [2024-06-20 15:47:50,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:50,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:47:50,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:50,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:47:50,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:47:50,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:47:50,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 152 transitions, 1634 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:50,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:50,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:47:50,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:51,404 INFO L124 PetriNetUnfolderBase]: 2839/4196 cut-off events. [2024-06-20 15:47:51,404 INFO L125 PetriNetUnfolderBase]: For 121371/121377 co-relation queries the response was YES. [2024-06-20 15:47:51,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27986 conditions, 4196 events. 2839/4196 cut-off events. For 121371/121377 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 19869 event pairs, 789 based on Foata normal form. 10/4203 useless extension candidates. Maximal degree in co-relation 27931. Up to 4012 conditions per place. [2024-06-20 15:47:51,430 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 148 selfloop transitions, 34 changer transitions 0/185 dead transitions. [2024-06-20 15:47:51,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 185 transitions, 2154 flow [2024-06-20 15:47:51,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:51,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:51,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 15:47:51,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-20 15:47:51,432 INFO L175 Difference]: Start difference. First operand has 125 places, 152 transitions, 1634 flow. Second operand 8 states and 133 transitions. [2024-06-20 15:47:51,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 185 transitions, 2154 flow [2024-06-20 15:47:51,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 185 transitions, 2055 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 15:47:51,498 INFO L231 Difference]: Finished difference. Result has 127 places, 154 transitions, 1672 flow [2024-06-20 15:47:51,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1535, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1672, PETRI_PLACES=127, PETRI_TRANSITIONS=154} [2024-06-20 15:47:51,499 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-20 15:47:51,499 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 154 transitions, 1672 flow [2024-06-20 15:47:51,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:51,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:51,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:51,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:47:51,500 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:51,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:51,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1529206897, now seen corresponding path program 1 times [2024-06-20 15:47:51,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:51,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863616066] [2024-06-20 15:47:51,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:51,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:54,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:54,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863616066] [2024-06-20 15:47:54,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863616066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:54,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:54,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:47:54,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564024208] [2024-06-20 15:47:54,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:54,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:47:54,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:54,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:47:54,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:47:54,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:47:54,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 154 transitions, 1672 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:54,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:54,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:47:54,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:55,320 INFO L124 PetriNetUnfolderBase]: 2829/4182 cut-off events. [2024-06-20 15:47:55,321 INFO L125 PetriNetUnfolderBase]: For 130848/130854 co-relation queries the response was YES. [2024-06-20 15:47:55,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28191 conditions, 4182 events. 2829/4182 cut-off events. For 130848/130854 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19748 event pairs, 815 based on Foata normal form. 10/4189 useless extension candidates. Maximal degree in co-relation 28135. Up to 3952 conditions per place. [2024-06-20 15:47:55,354 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 148 selfloop transitions, 38 changer transitions 0/189 dead transitions. [2024-06-20 15:47:55,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 189 transitions, 2222 flow [2024-06-20 15:47:55,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:55,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:55,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 15:47:55,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 15:47:55,356 INFO L175 Difference]: Start difference. First operand has 127 places, 154 transitions, 1672 flow. Second operand 8 states and 135 transitions. [2024-06-20 15:47:55,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 189 transitions, 2222 flow [2024-06-20 15:47:55,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 189 transitions, 2107 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 15:47:55,448 INFO L231 Difference]: Finished difference. Result has 129 places, 157 transitions, 1724 flow [2024-06-20 15:47:55,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1724, PETRI_PLACES=129, PETRI_TRANSITIONS=157} [2024-06-20 15:47:55,448 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-20 15:47:55,448 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 157 transitions, 1724 flow [2024-06-20 15:47:55,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:55,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:55,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:55,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:47:55,449 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:55,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:55,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1644613263, now seen corresponding path program 3 times [2024-06-20 15:47:55,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:55,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626769894] [2024-06-20 15:47:55,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:55,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:57,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:57,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626769894] [2024-06-20 15:47:57,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626769894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:57,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:57,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:47:57,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122465763] [2024-06-20 15:47:57,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:57,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:47:57,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:57,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:47:57,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:47:57,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:47:57,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 157 transitions, 1724 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:57,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:57,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:47:57,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:59,164 INFO L124 PetriNetUnfolderBase]: 2846/4210 cut-off events. [2024-06-20 15:47:59,164 INFO L125 PetriNetUnfolderBase]: For 138698/138698 co-relation queries the response was YES. [2024-06-20 15:47:59,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28805 conditions, 4210 events. 2846/4210 cut-off events. For 138698/138698 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 19960 event pairs, 759 based on Foata normal form. 4/4211 useless extension candidates. Maximal degree in co-relation 28748. Up to 4003 conditions per place. [2024-06-20 15:47:59,196 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 146 selfloop transitions, 38 changer transitions 0/187 dead transitions. [2024-06-20 15:47:59,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 187 transitions, 2238 flow [2024-06-20 15:47:59,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:59,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:59,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 15:47:59,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-20 15:47:59,197 INFO L175 Difference]: Start difference. First operand has 129 places, 157 transitions, 1724 flow. Second operand 8 states and 133 transitions. [2024-06-20 15:47:59,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 187 transitions, 2238 flow [2024-06-20 15:47:59,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 187 transitions, 2115 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 15:47:59,322 INFO L231 Difference]: Finished difference. Result has 131 places, 159 transitions, 1748 flow [2024-06-20 15:47:59,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1601, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1748, PETRI_PLACES=131, PETRI_TRANSITIONS=159} [2024-06-20 15:47:59,322 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-20 15:47:59,322 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 159 transitions, 1748 flow [2024-06-20 15:47:59,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:59,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:59,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:59,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:47:59,323 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:59,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:59,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1644797961, now seen corresponding path program 1 times [2024-06-20 15:47:59,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:59,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627046222] [2024-06-20 15:47:59,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:59,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:02,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:02,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:02,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627046222] [2024-06-20 15:48:02,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627046222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:02,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:02,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:48:02,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892892376] [2024-06-20 15:48:02,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:02,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:48:02,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:02,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:48:02,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:48:02,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:48:02,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 159 transitions, 1748 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:02,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:02,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:48:02,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:04,106 INFO L124 PetriNetUnfolderBase]: 2835/4192 cut-off events. [2024-06-20 15:48:04,107 INFO L125 PetriNetUnfolderBase]: For 146643/146649 co-relation queries the response was YES. [2024-06-20 15:48:04,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29000 conditions, 4192 events. 2835/4192 cut-off events. For 146643/146649 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 19812 event pairs, 744 based on Foata normal form. 8/4197 useless extension candidates. Maximal degree in co-relation 28942. Up to 4113 conditions per place. [2024-06-20 15:48:04,136 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 169 selfloop transitions, 23 changer transitions 0/195 dead transitions. [2024-06-20 15:48:04,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 195 transitions, 2305 flow [2024-06-20 15:48:04,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:48:04,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:48:04,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-20 15:48:04,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-20 15:48:04,138 INFO L175 Difference]: Start difference. First operand has 131 places, 159 transitions, 1748 flow. Second operand 9 states and 142 transitions. [2024-06-20 15:48:04,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 195 transitions, 2305 flow [2024-06-20 15:48:04,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 195 transitions, 2176 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 15:48:04,269 INFO L231 Difference]: Finished difference. Result has 135 places, 164 transitions, 1756 flow [2024-06-20 15:48:04,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1619, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1756, PETRI_PLACES=135, PETRI_TRANSITIONS=164} [2024-06-20 15:48:04,270 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-20 15:48:04,270 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 164 transitions, 1756 flow [2024-06-20 15:48:04,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:04,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:04,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:04,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:48:04,271 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:48:04,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:04,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1251505987, now seen corresponding path program 1 times [2024-06-20 15:48:04,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:04,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715885807] [2024-06-20 15:48:04,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:04,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:05,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:05,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:05,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715885807] [2024-06-20 15:48:05,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715885807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:05,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:05,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:48:05,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204522207] [2024-06-20 15:48:05,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:05,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:48:05,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:05,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:48:05,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:48:05,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:48:05,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 164 transitions, 1756 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:05,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:05,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:48:05,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:07,057 INFO L124 PetriNetUnfolderBase]: 2840/4199 cut-off events. [2024-06-20 15:48:07,057 INFO L125 PetriNetUnfolderBase]: For 153621/153627 co-relation queries the response was YES. [2024-06-20 15:48:07,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29356 conditions, 4199 events. 2840/4199 cut-off events. For 153621/153627 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 19866 event pairs, 743 based on Foata normal form. 7/4203 useless extension candidates. Maximal degree in co-relation 29296. Up to 4156 conditions per place. [2024-06-20 15:48:07,087 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 166 selfloop transitions, 14 changer transitions 0/183 dead transitions. [2024-06-20 15:48:07,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 183 transitions, 2206 flow [2024-06-20 15:48:07,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:48:07,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:48:07,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-20 15:48:07,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 15:48:07,089 INFO L175 Difference]: Start difference. First operand has 135 places, 164 transitions, 1756 flow. Second operand 6 states and 96 transitions. [2024-06-20 15:48:07,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 183 transitions, 2206 flow [2024-06-20 15:48:07,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 183 transitions, 2118 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 15:48:07,209 INFO L231 Difference]: Finished difference. Result has 135 places, 167 transitions, 1745 flow [2024-06-20 15:48:07,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1745, PETRI_PLACES=135, PETRI_TRANSITIONS=167} [2024-06-20 15:48:07,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-20 15:48:07,210 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 167 transitions, 1745 flow [2024-06-20 15:48:07,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:07,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:07,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:07,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:48:07,211 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:48:07,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:07,211 INFO L85 PathProgramCache]: Analyzing trace with hash 305672201, now seen corresponding path program 2 times [2024-06-20 15:48:07,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:07,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141802920] [2024-06-20 15:48:07,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:07,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:10,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:10,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:10,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141802920] [2024-06-20 15:48:10,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141802920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:10,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:10,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:48:10,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140056028] [2024-06-20 15:48:10,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:10,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:48:10,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:10,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:48:10,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:48:10,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:48:10,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 167 transitions, 1745 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:10,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:10,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:48:10,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:11,844 INFO L124 PetriNetUnfolderBase]: 2862/4232 cut-off events. [2024-06-20 15:48:11,844 INFO L125 PetriNetUnfolderBase]: For 162857/162881 co-relation queries the response was YES. [2024-06-20 15:48:11,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30114 conditions, 4232 events. 2862/4232 cut-off events. For 162857/162881 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 20048 event pairs, 736 based on Foata normal form. 18/4243 useless extension candidates. Maximal degree in co-relation 30053. Up to 4071 conditions per place. [2024-06-20 15:48:11,877 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 158 selfloop transitions, 46 changer transitions 0/207 dead transitions. [2024-06-20 15:48:11,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 207 transitions, 2399 flow [2024-06-20 15:48:11,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:48:11,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:48:11,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 15:48:11,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-20 15:48:11,880 INFO L175 Difference]: Start difference. First operand has 135 places, 167 transitions, 1745 flow. Second operand 9 states and 143 transitions. [2024-06-20 15:48:11,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 207 transitions, 2399 flow [2024-06-20 15:48:12,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 207 transitions, 2346 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 15:48:12,030 INFO L231 Difference]: Finished difference. Result has 141 places, 178 transitions, 1965 flow [2024-06-20 15:48:12,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1965, PETRI_PLACES=141, PETRI_TRANSITIONS=178} [2024-06-20 15:48:12,032 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-20 15:48:12,032 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 178 transitions, 1965 flow [2024-06-20 15:48:12,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:12,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:12,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:12,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:48:12,033 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:48:12,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:12,033 INFO L85 PathProgramCache]: Analyzing trace with hash 305968871, now seen corresponding path program 3 times [2024-06-20 15:48:12,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:12,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236825139] [2024-06-20 15:48:12,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:12,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:15,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:15,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236825139] [2024-06-20 15:48:15,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236825139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:15,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:15,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:48:15,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67522884] [2024-06-20 15:48:15,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:15,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:48:15,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:15,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:48:15,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:48:15,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:48:15,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 178 transitions, 1965 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:15,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:15,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:48:15,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:16,721 INFO L124 PetriNetUnfolderBase]: 2873/4248 cut-off events. [2024-06-20 15:48:16,721 INFO L125 PetriNetUnfolderBase]: For 173092/173116 co-relation queries the response was YES. [2024-06-20 15:48:16,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30960 conditions, 4248 events. 2873/4248 cut-off events. For 173092/173116 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 20090 event pairs, 741 based on Foata normal form. 18/4259 useless extension candidates. Maximal degree in co-relation 30897. Up to 4040 conditions per place. [2024-06-20 15:48:16,757 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 151 selfloop transitions, 60 changer transitions 0/214 dead transitions. [2024-06-20 15:48:16,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 214 transitions, 2730 flow [2024-06-20 15:48:16,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:48:16,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:48:16,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 15:48:16,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-20 15:48:16,759 INFO L175 Difference]: Start difference. First operand has 141 places, 178 transitions, 1965 flow. Second operand 9 states and 146 transitions. [2024-06-20 15:48:16,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 214 transitions, 2730 flow [2024-06-20 15:48:16,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 214 transitions, 2624 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-20 15:48:16,909 INFO L231 Difference]: Finished difference. Result has 146 places, 183 transitions, 2118 flow [2024-06-20 15:48:16,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1859, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2118, PETRI_PLACES=146, PETRI_TRANSITIONS=183} [2024-06-20 15:48:16,909 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-20 15:48:16,909 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 183 transitions, 2118 flow [2024-06-20 15:48:16,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:16,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:16,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:16,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:48:16,910 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:48:16,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:16,910 INFO L85 PathProgramCache]: Analyzing trace with hash 40324019, now seen corresponding path program 4 times [2024-06-20 15:48:16,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:16,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163612555] [2024-06-20 15:48:16,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:16,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:19,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:19,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163612555] [2024-06-20 15:48:19,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163612555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:19,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:19,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:48:19,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236260355] [2024-06-20 15:48:19,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:19,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:48:19,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:19,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:48:19,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:48:19,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:48:19,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 183 transitions, 2118 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:19,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:19,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:48:19,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:20,607 INFO L124 PetriNetUnfolderBase]: 2862/4231 cut-off events. [2024-06-20 15:48:20,607 INFO L125 PetriNetUnfolderBase]: For 180304/180328 co-relation queries the response was YES. [2024-06-20 15:48:20,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30783 conditions, 4231 events. 2862/4231 cut-off events. For 180304/180328 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 20021 event pairs, 741 based on Foata normal form. 18/4242 useless extension candidates. Maximal degree in co-relation 30719. Up to 4025 conditions per place. [2024-06-20 15:48:20,640 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 151 selfloop transitions, 55 changer transitions 0/209 dead transitions. [2024-06-20 15:48:20,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 209 transitions, 2623 flow [2024-06-20 15:48:20,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:48:20,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:48:20,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 15:48:20,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-20 15:48:20,642 INFO L175 Difference]: Start difference. First operand has 146 places, 183 transitions, 2118 flow. Second operand 8 states and 133 transitions. [2024-06-20 15:48:20,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 209 transitions, 2623 flow [2024-06-20 15:48:20,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 209 transitions, 2473 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-20 15:48:20,823 INFO L231 Difference]: Finished difference. Result has 150 places, 184 transitions, 2115 flow [2024-06-20 15:48:20,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1970, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2115, PETRI_PLACES=150, PETRI_TRANSITIONS=184} [2024-06-20 15:48:20,823 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-20 15:48:20,824 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 184 transitions, 2115 flow [2024-06-20 15:48:20,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:20,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:20,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:20,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:48:20,824 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:48:20,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:20,825 INFO L85 PathProgramCache]: Analyzing trace with hash 69312143, now seen corresponding path program 4 times [2024-06-20 15:48:20,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:20,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189328880] [2024-06-20 15:48:20,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:20,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:23,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:23,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189328880] [2024-06-20 15:48:23,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189328880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:23,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:23,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:48:23,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728179954] [2024-06-20 15:48:23,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:23,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:48:23,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:23,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:48:23,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:48:23,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:48:23,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 184 transitions, 2115 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:23,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:23,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:48:23,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:24,567 INFO L124 PetriNetUnfolderBase]: 2854/4222 cut-off events. [2024-06-20 15:48:24,567 INFO L125 PetriNetUnfolderBase]: For 188522/188537 co-relation queries the response was YES. [2024-06-20 15:48:24,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30941 conditions, 4222 events. 2854/4222 cut-off events. For 188522/188537 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 19939 event pairs, 723 based on Foata normal form. 10/4219 useless extension candidates. Maximal degree in co-relation 30874. Up to 3976 conditions per place. [2024-06-20 15:48:24,603 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 164 selfloop transitions, 45 changer transitions 0/212 dead transitions. [2024-06-20 15:48:24,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 212 transitions, 2677 flow [2024-06-20 15:48:24,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:48:24,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:48:24,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 15:48:24,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 15:48:24,607 INFO L175 Difference]: Start difference. First operand has 150 places, 184 transitions, 2115 flow. Second operand 8 states and 132 transitions. [2024-06-20 15:48:24,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 212 transitions, 2677 flow [2024-06-20 15:48:24,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 212 transitions, 2567 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 15:48:24,768 INFO L231 Difference]: Finished difference. Result has 153 places, 186 transitions, 2170 flow [2024-06-20 15:48:24,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2005, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2170, PETRI_PLACES=153, PETRI_TRANSITIONS=186} [2024-06-20 15:48:24,769 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-20 15:48:24,769 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 186 transitions, 2170 flow [2024-06-20 15:48:24,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:24,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:24,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:24,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:48:24,770 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:48:24,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:24,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1263886147, now seen corresponding path program 2 times [2024-06-20 15:48:24,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:24,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534620229] [2024-06-20 15:48:24,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:24,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:26,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:26,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534620229] [2024-06-20 15:48:26,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534620229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:26,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:26,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:48:26,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746406481] [2024-06-20 15:48:26,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:26,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:48:26,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:26,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:48:26,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:48:26,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:48:26,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 186 transitions, 2170 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:26,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:26,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:48:26,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:27,375 INFO L124 PetriNetUnfolderBase]: 2851/4215 cut-off events. [2024-06-20 15:48:27,375 INFO L125 PetriNetUnfolderBase]: For 197220/197244 co-relation queries the response was YES. [2024-06-20 15:48:27,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31325 conditions, 4215 events. 2851/4215 cut-off events. For 197220/197244 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 19949 event pairs, 734 based on Foata normal form. 17/4225 useless extension candidates. Maximal degree in co-relation 31257. Up to 4165 conditions per place. [2024-06-20 15:48:27,406 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 178 selfloop transitions, 19 changer transitions 0/200 dead transitions. [2024-06-20 15:48:27,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 200 transitions, 2644 flow [2024-06-20 15:48:27,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:48:27,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:48:27,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-06-20 15:48:27,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-20 15:48:27,409 INFO L175 Difference]: Start difference. First operand has 153 places, 186 transitions, 2170 flow. Second operand 6 states and 92 transitions. [2024-06-20 15:48:27,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 200 transitions, 2644 flow [2024-06-20 15:48:27,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 200 transitions, 2497 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-20 15:48:27,550 INFO L231 Difference]: Finished difference. Result has 153 places, 189 transitions, 2115 flow [2024-06-20 15:48:27,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2023, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2115, PETRI_PLACES=153, PETRI_TRANSITIONS=189} [2024-06-20 15:48:27,550 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-20 15:48:27,550 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 189 transitions, 2115 flow [2024-06-20 15:48:27,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:27,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:27,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:27,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:48:27,551 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:48:27,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:27,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1257225859, now seen corresponding path program 1 times [2024-06-20 15:48:27,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:27,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74379529] [2024-06-20 15:48:27,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:27,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:29,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:29,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74379529] [2024-06-20 15:48:29,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74379529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:29,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:29,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:48:29,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618230849] [2024-06-20 15:48:29,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:29,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:48:29,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:29,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:48:29,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:48:29,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 15:48:29,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 189 transitions, 2115 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:29,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:29,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 15:48:29,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:29,943 INFO L124 PetriNetUnfolderBase]: 2562/3906 cut-off events. [2024-06-20 15:48:29,944 INFO L125 PetriNetUnfolderBase]: For 175873/175873 co-relation queries the response was YES. [2024-06-20 15:48:29,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28512 conditions, 3906 events. 2562/3906 cut-off events. For 175873/175873 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19153 event pairs, 636 based on Foata normal form. 1/3904 useless extension candidates. Maximal degree in co-relation 28443. Up to 3772 conditions per place. [2024-06-20 15:48:29,978 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 189 selfloop transitions, 11 changer transitions 0/204 dead transitions. [2024-06-20 15:48:29,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 204 transitions, 2595 flow [2024-06-20 15:48:29,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:48:29,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:48:29,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-20 15:48:29,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 15:48:29,983 INFO L175 Difference]: Start difference. First operand has 153 places, 189 transitions, 2115 flow. Second operand 6 states and 98 transitions. [2024-06-20 15:48:29,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 204 transitions, 2595 flow [2024-06-20 15:48:30,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 204 transitions, 2525 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 15:48:30,132 INFO L231 Difference]: Finished difference. Result has 155 places, 192 transitions, 2123 flow [2024-06-20 15:48:30,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2045, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2123, PETRI_PLACES=155, PETRI_TRANSITIONS=192} [2024-06-20 15:48:30,133 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-20 15:48:30,133 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 192 transitions, 2123 flow [2024-06-20 15:48:30,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:30,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:30,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:30,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:48:30,133 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:48:30,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:30,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1263892099, now seen corresponding path program 2 times [2024-06-20 15:48:30,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:30,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386256039] [2024-06-20 15:48:30,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:30,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:31,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:31,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386256039] [2024-06-20 15:48:31,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386256039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:31,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:31,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:48:31,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725162855] [2024-06-20 15:48:31,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:31,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:48:31,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:31,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:48:31,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:48:31,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 15:48:31,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 192 transitions, 2123 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:31,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:31,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 15:48:31,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:32,820 INFO L124 PetriNetUnfolderBase]: 2559/3902 cut-off events. [2024-06-20 15:48:32,820 INFO L125 PetriNetUnfolderBase]: For 182912/182912 co-relation queries the response was YES. [2024-06-20 15:48:32,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28937 conditions, 3902 events. 2559/3902 cut-off events. For 182912/182912 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19150 event pairs, 636 based on Foata normal form. 1/3900 useless extension candidates. Maximal degree in co-relation 28867. Up to 3774 conditions per place. [2024-06-20 15:48:32,852 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 189 selfloop transitions, 11 changer transitions 0/204 dead transitions. [2024-06-20 15:48:32,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 204 transitions, 2599 flow [2024-06-20 15:48:32,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:48:32,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:48:32,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-20 15:48:32,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2024-06-20 15:48:32,853 INFO L175 Difference]: Start difference. First operand has 155 places, 192 transitions, 2123 flow. Second operand 6 states and 95 transitions. [2024-06-20 15:48:32,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 204 transitions, 2599 flow [2024-06-20 15:48:33,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 204 transitions, 2543 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-20 15:48:33,013 INFO L231 Difference]: Finished difference. Result has 157 places, 195 transitions, 2151 flow [2024-06-20 15:48:33,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2067, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2151, PETRI_PLACES=157, PETRI_TRANSITIONS=195} [2024-06-20 15:48:33,013 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-20 15:48:33,013 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 195 transitions, 2151 flow [2024-06-20 15:48:33,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:33,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:33,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:33,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:48:33,014 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:48:33,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:33,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1681629127, now seen corresponding path program 1 times [2024-06-20 15:48:33,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:33,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857895379] [2024-06-20 15:48:33,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:33,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:35,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:35,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857895379] [2024-06-20 15:48:35,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857895379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:35,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:35,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:48:35,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970029896] [2024-06-20 15:48:35,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:35,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:48:35,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:35,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:48:35,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:48:35,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:48:35,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 195 transitions, 2151 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:35,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:35,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:48:35,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:36,636 INFO L124 PetriNetUnfolderBase]: 2887/4271 cut-off events. [2024-06-20 15:48:36,636 INFO L125 PetriNetUnfolderBase]: For 232325/232331 co-relation queries the response was YES. [2024-06-20 15:48:36,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33145 conditions, 4271 events. 2887/4271 cut-off events. For 232325/232331 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 20277 event pairs, 548 based on Foata normal form. 14/4282 useless extension candidates. Maximal degree in co-relation 33074. Up to 4065 conditions per place. [2024-06-20 15:48:36,671 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 202 selfloop transitions, 29 changer transitions 0/234 dead transitions. [2024-06-20 15:48:36,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 234 transitions, 2793 flow [2024-06-20 15:48:36,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:48:36,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:48:36,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 15:48:36,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 15:48:36,673 INFO L175 Difference]: Start difference. First operand has 157 places, 195 transitions, 2151 flow. Second operand 9 states and 147 transitions. [2024-06-20 15:48:36,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 234 transitions, 2793 flow [2024-06-20 15:48:36,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 234 transitions, 2731 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 15:48:36,847 INFO L231 Difference]: Finished difference. Result has 162 places, 197 transitions, 2222 flow [2024-06-20 15:48:36,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2089, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2222, PETRI_PLACES=162, PETRI_TRANSITIONS=197} [2024-06-20 15:48:36,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-20 15:48:36,850 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 197 transitions, 2222 flow [2024-06-20 15:48:36,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:36,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:36,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:36,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:48:36,850 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:48:36,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:36,851 INFO L85 PathProgramCache]: Analyzing trace with hash 844787845, now seen corresponding path program 2 times [2024-06-20 15:48:36,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:36,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875023554] [2024-06-20 15:48:36,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:36,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:39,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:39,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875023554] [2024-06-20 15:48:39,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875023554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:39,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:39,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:48:39,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958956620] [2024-06-20 15:48:39,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:39,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:48:39,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:39,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:48:39,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:48:39,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:48:39,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 197 transitions, 2222 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:39,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:39,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:48:39,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:41,028 INFO L124 PetriNetUnfolderBase]: 2921/4325 cut-off events. [2024-06-20 15:48:41,029 INFO L125 PetriNetUnfolderBase]: For 243646/243652 co-relation queries the response was YES. [2024-06-20 15:48:41,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34105 conditions, 4325 events. 2921/4325 cut-off events. For 243646/243652 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 20650 event pairs, 650 based on Foata normal form. 14/4336 useless extension candidates. Maximal degree in co-relation 34033. Up to 4039 conditions per place. [2024-06-20 15:48:41,068 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 194 selfloop transitions, 40 changer transitions 0/237 dead transitions. [2024-06-20 15:48:41,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 237 transitions, 2882 flow [2024-06-20 15:48:41,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:48:41,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:48:41,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 15:48:41,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-20 15:48:41,069 INFO L175 Difference]: Start difference. First operand has 162 places, 197 transitions, 2222 flow. Second operand 9 states and 150 transitions. [2024-06-20 15:48:41,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 237 transitions, 2882 flow [2024-06-20 15:48:41,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 237 transitions, 2767 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 15:48:41,275 INFO L231 Difference]: Finished difference. Result has 164 places, 199 transitions, 2267 flow [2024-06-20 15:48:41,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2267, PETRI_PLACES=164, PETRI_TRANSITIONS=199} [2024-06-20 15:48:41,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-20 15:48:41,285 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 199 transitions, 2267 flow [2024-06-20 15:48:41,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:41,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:41,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:41,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 15:48:41,286 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:48:41,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:41,286 INFO L85 PathProgramCache]: Analyzing trace with hash 77654043, now seen corresponding path program 3 times [2024-06-20 15:48:41,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:41,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943922351] [2024-06-20 15:48:41,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:41,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:43,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:43,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943922351] [2024-06-20 15:48:43,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943922351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:43,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:43,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:48:43,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762425419] [2024-06-20 15:48:43,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:43,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:48:43,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:43,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:48:43,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:48:44,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:48:44,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 199 transitions, 2267 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:44,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:44,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:48:44,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:45,334 INFO L124 PetriNetUnfolderBase]: 2955/4379 cut-off events. [2024-06-20 15:48:45,335 INFO L125 PetriNetUnfolderBase]: For 260531/260537 co-relation queries the response was YES. [2024-06-20 15:48:45,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34837 conditions, 4379 events. 2955/4379 cut-off events. For 260531/260537 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 21010 event pairs, 696 based on Foata normal form. 14/4390 useless extension candidates. Maximal degree in co-relation 34764. Up to 4149 conditions per place. [2024-06-20 15:48:45,373 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 199 selfloop transitions, 36 changer transitions 0/238 dead transitions. [2024-06-20 15:48:45,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 238 transitions, 2927 flow [2024-06-20 15:48:45,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:48:45,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:48:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 15:48:45,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-20 15:48:45,375 INFO L175 Difference]: Start difference. First operand has 164 places, 199 transitions, 2267 flow. Second operand 9 states and 148 transitions. [2024-06-20 15:48:45,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 238 transitions, 2927 flow [2024-06-20 15:48:45,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 238 transitions, 2787 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-20 15:48:45,577 INFO L231 Difference]: Finished difference. Result has 166 places, 201 transitions, 2282 flow [2024-06-20 15:48:45,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2127, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2282, PETRI_PLACES=166, PETRI_TRANSITIONS=201} [2024-06-20 15:48:45,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-20 15:48:45,579 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 201 transitions, 2282 flow [2024-06-20 15:48:45,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:45,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:45,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:45,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 15:48:45,579 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:48:45,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:45,580 INFO L85 PathProgramCache]: Analyzing trace with hash 164499675, now seen corresponding path program 1 times [2024-06-20 15:48:45,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:45,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147460895] [2024-06-20 15:48:45,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:45,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:49,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:49,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147460895] [2024-06-20 15:48:49,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147460895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:49,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:49,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:48:49,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774992252] [2024-06-20 15:48:49,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:49,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:48:49,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:49,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:48:49,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:48:49,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:48:49,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 201 transitions, 2282 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:49,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:49,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:48:49,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:50,711 INFO L124 PetriNetUnfolderBase]: 2977/4411 cut-off events. [2024-06-20 15:48:50,711 INFO L125 PetriNetUnfolderBase]: For 269153/269159 co-relation queries the response was YES. [2024-06-20 15:48:50,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35273 conditions, 4411 events. 2977/4411 cut-off events. For 269153/269159 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 21192 event pairs, 679 based on Foata normal form. 10/4418 useless extension candidates. Maximal degree in co-relation 35199. Up to 4190 conditions per place. [2024-06-20 15:48:50,752 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 205 selfloop transitions, 40 changer transitions 0/248 dead transitions. [2024-06-20 15:48:50,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 248 transitions, 2998 flow [2024-06-20 15:48:50,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:48:50,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:48:50,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-20 15:48:50,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-20 15:48:50,758 INFO L175 Difference]: Start difference. First operand has 166 places, 201 transitions, 2282 flow. Second operand 10 states and 164 transitions. [2024-06-20 15:48:50,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 248 transitions, 2998 flow [2024-06-20 15:48:50,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 248 transitions, 2861 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-20 15:48:50,966 INFO L231 Difference]: Finished difference. Result has 170 places, 207 transitions, 2338 flow [2024-06-20 15:48:50,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2145, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2338, PETRI_PLACES=170, PETRI_TRANSITIONS=207} [2024-06-20 15:48:50,971 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-20 15:48:50,973 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 207 transitions, 2338 flow [2024-06-20 15:48:50,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:50,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:50,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:50,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 15:48:50,975 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:48:50,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:50,975 INFO L85 PathProgramCache]: Analyzing trace with hash 141652833, now seen corresponding path program 1 times [2024-06-20 15:48:50,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:50,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948256202] [2024-06-20 15:48:50,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:50,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:52,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:52,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948256202] [2024-06-20 15:48:52,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948256202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:52,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:52,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:48:52,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301967976] [2024-06-20 15:48:52,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:52,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:48:52,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:52,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:48:52,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:48:52,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:48:52,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 207 transitions, 2338 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:52,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:52,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:48:52,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:53,919 INFO L124 PetriNetUnfolderBase]: 2987/4425 cut-off events. [2024-06-20 15:48:53,919 INFO L125 PetriNetUnfolderBase]: For 277443/277449 co-relation queries the response was YES. [2024-06-20 15:48:53,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35692 conditions, 4425 events. 2987/4425 cut-off events. For 277443/277449 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 21248 event pairs, 699 based on Foata normal form. 8/4430 useless extension candidates. Maximal degree in co-relation 35616. Up to 4310 conditions per place. [2024-06-20 15:48:53,959 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 204 selfloop transitions, 26 changer transitions 0/233 dead transitions. [2024-06-20 15:48:53,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 233 transitions, 2920 flow [2024-06-20 15:48:53,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:48:53,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:48:53,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 15:48:53,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-20 15:48:53,960 INFO L175 Difference]: Start difference. First operand has 170 places, 207 transitions, 2338 flow. Second operand 7 states and 115 transitions. [2024-06-20 15:48:53,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 233 transitions, 2920 flow [2024-06-20 15:48:54,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 233 transitions, 2786 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 15:48:54,226 INFO L231 Difference]: Finished difference. Result has 170 places, 210 transitions, 2318 flow [2024-06-20 15:48:54,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2204, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2318, PETRI_PLACES=170, PETRI_TRANSITIONS=210} [2024-06-20 15:48:54,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-20 15:48:54,227 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 210 transitions, 2318 flow [2024-06-20 15:48:54,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:54,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:54,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:54,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 15:48:54,228 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:48:54,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:54,228 INFO L85 PathProgramCache]: Analyzing trace with hash -556591453, now seen corresponding path program 4 times [2024-06-20 15:48:54,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:54,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319004157] [2024-06-20 15:48:54,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:54,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:57,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:57,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319004157] [2024-06-20 15:48:57,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319004157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:57,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:57,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:48:57,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561506280] [2024-06-20 15:48:57,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:57,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:48:57,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:57,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:48:57,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:48:57,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:48:57,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 210 transitions, 2318 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:57,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:57,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:48:57,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:58,645 INFO L124 PetriNetUnfolderBase]: 3021/4480 cut-off events. [2024-06-20 15:48:58,645 INFO L125 PetriNetUnfolderBase]: For 295864/295864 co-relation queries the response was YES. [2024-06-20 15:48:58,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36539 conditions, 4480 events. 3021/4480 cut-off events. For 295864/295864 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 21568 event pairs, 678 based on Foata normal form. 8/4485 useless extension candidates. Maximal degree in co-relation 36462. Up to 4199 conditions per place. [2024-06-20 15:48:58,687 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 203 selfloop transitions, 41 changer transitions 0/247 dead transitions. [2024-06-20 15:48:58,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 247 transitions, 2996 flow [2024-06-20 15:48:58,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:48:58,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:48:58,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 15:48:58,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-20 15:48:58,689 INFO L175 Difference]: Start difference. First operand has 170 places, 210 transitions, 2318 flow. Second operand 9 states and 150 transitions. [2024-06-20 15:48:58,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 247 transitions, 2996 flow [2024-06-20 15:48:58,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 247 transitions, 2912 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 15:48:58,955 INFO L231 Difference]: Finished difference. Result has 174 places, 212 transitions, 2403 flow [2024-06-20 15:48:58,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2234, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2403, PETRI_PLACES=174, PETRI_TRANSITIONS=212} [2024-06-20 15:48:58,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-20 15:48:58,955 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 212 transitions, 2403 flow [2024-06-20 15:48:58,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:58,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:58,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:58,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 15:48:58,956 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:48:58,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:58,956 INFO L85 PathProgramCache]: Analyzing trace with hash -556441351, now seen corresponding path program 2 times [2024-06-20 15:48:58,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:58,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613399851] [2024-06-20 15:48:58,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:58,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:01,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:01,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613399851] [2024-06-20 15:49:01,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613399851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:01,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:01,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:49:01,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635324739] [2024-06-20 15:49:01,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:01,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:49:01,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:01,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:49:01,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:49:02,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:49:02,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 212 transitions, 2403 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:02,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:02,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:49:02,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:03,472 INFO L124 PetriNetUnfolderBase]: 3027/4489 cut-off events. [2024-06-20 15:49:03,472 INFO L125 PetriNetUnfolderBase]: For 306738/306738 co-relation queries the response was YES. [2024-06-20 15:49:03,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37098 conditions, 4489 events. 3027/4489 cut-off events. For 306738/306738 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 21699 event pairs, 669 based on Foata normal form. 4/4490 useless extension candidates. Maximal degree in co-relation 37020. Up to 4231 conditions per place. [2024-06-20 15:49:03,514 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 208 selfloop transitions, 45 changer transitions 0/256 dead transitions. [2024-06-20 15:49:03,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 256 transitions, 3128 flow [2024-06-20 15:49:03,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:49:03,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:49:03,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-20 15:49:03,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-20 15:49:03,516 INFO L175 Difference]: Start difference. First operand has 174 places, 212 transitions, 2403 flow. Second operand 10 states and 164 transitions. [2024-06-20 15:49:03,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 256 transitions, 3128 flow [2024-06-20 15:49:03,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 256 transitions, 2974 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-20 15:49:03,812 INFO L231 Difference]: Finished difference. Result has 178 places, 218 transitions, 2458 flow [2024-06-20 15:49:03,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2252, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2458, PETRI_PLACES=178, PETRI_TRANSITIONS=218} [2024-06-20 15:49:03,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-20 15:49:03,813 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 218 transitions, 2458 flow [2024-06-20 15:49:03,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:03,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:03,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:03,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 15:49:03,814 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:49:03,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:03,814 INFO L85 PathProgramCache]: Analyzing trace with hash 216260640, now seen corresponding path program 1 times [2024-06-20 15:49:03,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:03,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653219175] [2024-06-20 15:49:03,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:03,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:07,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:07,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653219175] [2024-06-20 15:49:07,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653219175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:07,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:07,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:49:07,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577997195] [2024-06-20 15:49:07,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:07,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:49:07,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:07,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:49:07,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:49:07,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:49:07,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 218 transitions, 2458 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:07,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:07,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:49:07,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:08,637 INFO L124 PetriNetUnfolderBase]: 3044/4515 cut-off events. [2024-06-20 15:49:08,637 INFO L125 PetriNetUnfolderBase]: For 318794/318800 co-relation queries the response was YES. [2024-06-20 15:49:08,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37632 conditions, 4515 events. 3044/4515 cut-off events. For 318794/318800 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 21842 event pairs, 691 based on Foata normal form. 10/4522 useless extension candidates. Maximal degree in co-relation 37552. Up to 4418 conditions per place. [2024-06-20 15:49:08,679 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 228 selfloop transitions, 25 changer transitions 0/256 dead transitions. [2024-06-20 15:49:08,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 256 transitions, 3154 flow [2024-06-20 15:49:08,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:49:08,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:49:08,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-20 15:49:08,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-20 15:49:08,681 INFO L175 Difference]: Start difference. First operand has 178 places, 218 transitions, 2458 flow. Second operand 10 states and 156 transitions. [2024-06-20 15:49:08,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 256 transitions, 3154 flow [2024-06-20 15:49:08,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 256 transitions, 3002 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-20 15:49:08,949 INFO L231 Difference]: Finished difference. Result has 181 places, 220 transitions, 2443 flow [2024-06-20 15:49:08,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2306, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2443, PETRI_PLACES=181, PETRI_TRANSITIONS=220} [2024-06-20 15:49:08,950 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-20 15:49:08,950 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 220 transitions, 2443 flow [2024-06-20 15:49:08,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:08,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:08,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:08,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 15:49:08,951 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:49:08,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:08,951 INFO L85 PathProgramCache]: Analyzing trace with hash 216045159, now seen corresponding path program 5 times [2024-06-20 15:49:08,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:08,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561953075] [2024-06-20 15:49:08,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:08,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:11,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:11,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561953075] [2024-06-20 15:49:11,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561953075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:11,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:11,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:49:11,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520247068] [2024-06-20 15:49:11,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:11,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:49:11,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:11,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:49:11,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:49:11,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:49:11,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 220 transitions, 2443 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:11,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:11,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:49:11,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:13,234 INFO L124 PetriNetUnfolderBase]: 3153/4694 cut-off events. [2024-06-20 15:49:13,234 INFO L125 PetriNetUnfolderBase]: For 362720/362726 co-relation queries the response was YES. [2024-06-20 15:49:13,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39282 conditions, 4694 events. 3153/4694 cut-off events. For 362720/362726 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 23036 event pairs, 710 based on Foata normal form. 34/4725 useless extension candidates. Maximal degree in co-relation 39201. Up to 4356 conditions per place. [2024-06-20 15:49:13,283 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 231 selfloop transitions, 30 changer transitions 0/264 dead transitions. [2024-06-20 15:49:13,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 264 transitions, 3375 flow [2024-06-20 15:49:13,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:49:13,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:49:13,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 15:49:13,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-20 15:49:13,284 INFO L175 Difference]: Start difference. First operand has 181 places, 220 transitions, 2443 flow. Second operand 9 states and 156 transitions. [2024-06-20 15:49:13,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 264 transitions, 3375 flow [2024-06-20 15:49:13,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 264 transitions, 3256 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-20 15:49:13,645 INFO L231 Difference]: Finished difference. Result has 182 places, 222 transitions, 2478 flow [2024-06-20 15:49:13,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2324, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2478, PETRI_PLACES=182, PETRI_TRANSITIONS=222} [2024-06-20 15:49:13,646 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-20 15:49:13,646 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 222 transitions, 2478 flow [2024-06-20 15:49:13,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:13,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:13,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:13,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 15:49:13,646 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:49:13,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:13,647 INFO L85 PathProgramCache]: Analyzing trace with hash -396529955, now seen corresponding path program 6 times [2024-06-20 15:49:13,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:13,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444335688] [2024-06-20 15:49:13,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:13,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:16,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:16,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444335688] [2024-06-20 15:49:16,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444335688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:16,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:16,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:49:16,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382545842] [2024-06-20 15:49:16,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:16,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:49:16,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:16,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:49:16,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:49:16,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:49:16,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 222 transitions, 2478 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:16,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:16,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:49:16,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:18,016 INFO L124 PetriNetUnfolderBase]: 3187/4749 cut-off events. [2024-06-20 15:49:18,016 INFO L125 PetriNetUnfolderBase]: For 365342/365342 co-relation queries the response was YES. [2024-06-20 15:49:18,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40181 conditions, 4749 events. 3187/4749 cut-off events. For 365342/365342 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 23453 event pairs, 702 based on Foata normal form. 8/4754 useless extension candidates. Maximal degree in co-relation 40099. Up to 4496 conditions per place. [2024-06-20 15:49:18,063 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 215 selfloop transitions, 40 changer transitions 0/258 dead transitions. [2024-06-20 15:49:18,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 258 transitions, 3182 flow [2024-06-20 15:49:18,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:49:18,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:49:18,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 15:49:18,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-20 15:49:18,065 INFO L175 Difference]: Start difference. First operand has 182 places, 222 transitions, 2478 flow. Second operand 9 states and 148 transitions. [2024-06-20 15:49:18,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 258 transitions, 3182 flow [2024-06-20 15:49:18,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 258 transitions, 3070 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-20 15:49:18,453 INFO L231 Difference]: Finished difference. Result has 184 places, 224 transitions, 2543 flow [2024-06-20 15:49:18,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2366, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2543, PETRI_PLACES=184, PETRI_TRANSITIONS=224} [2024-06-20 15:49:18,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-20 15:49:18,454 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 224 transitions, 2543 flow [2024-06-20 15:49:18,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:18,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:18,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:18,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 15:49:18,454 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:49:18,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:18,455 INFO L85 PathProgramCache]: Analyzing trace with hash -391013753, now seen corresponding path program 3 times [2024-06-20 15:49:18,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:18,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300265467] [2024-06-20 15:49:18,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:18,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:21,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:21,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300265467] [2024-06-20 15:49:21,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300265467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:21,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:21,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:49:21,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707825817] [2024-06-20 15:49:21,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:21,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:49:21,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:21,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:49:21,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:49:21,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:49:21,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 224 transitions, 2543 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:21,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:21,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:49:21,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:22,851 INFO L124 PetriNetUnfolderBase]: 3231/4812 cut-off events. [2024-06-20 15:49:22,851 INFO L125 PetriNetUnfolderBase]: For 368119/368125 co-relation queries the response was YES. [2024-06-20 15:49:22,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40462 conditions, 4812 events. 3231/4812 cut-off events. For 368119/368125 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 23854 event pairs, 706 based on Foata normal form. 10/4819 useless extension candidates. Maximal degree in co-relation 40379. Up to 4604 conditions per place. [2024-06-20 15:49:22,898 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 234 selfloop transitions, 35 changer transitions 0/272 dead transitions. [2024-06-20 15:49:22,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 272 transitions, 3486 flow [2024-06-20 15:49:22,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:49:22,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:49:22,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-20 15:49:22,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-20 15:49:22,900 INFO L175 Difference]: Start difference. First operand has 184 places, 224 transitions, 2543 flow. Second operand 10 states and 167 transitions. [2024-06-20 15:49:22,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 272 transitions, 3486 flow [2024-06-20 15:49:23,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 272 transitions, 3327 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-20 15:49:23,263 INFO L231 Difference]: Finished difference. Result has 188 places, 231 transitions, 2571 flow [2024-06-20 15:49:23,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2384, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2571, PETRI_PLACES=188, PETRI_TRANSITIONS=231} [2024-06-20 15:49:23,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-20 15:49:23,264 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 231 transitions, 2571 flow [2024-06-20 15:49:23,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:23,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:23,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:23,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 15:49:23,264 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:49:23,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:23,264 INFO L85 PathProgramCache]: Analyzing trace with hash -550877161, now seen corresponding path program 4 times [2024-06-20 15:49:23,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:23,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884927143] [2024-06-20 15:49:23,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:23,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:26,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:26,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884927143] [2024-06-20 15:49:26,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884927143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:26,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:26,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:49:26,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936520264] [2024-06-20 15:49:26,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:26,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:49:26,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:26,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:49:26,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:49:26,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:49:26,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 231 transitions, 2571 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:26,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:26,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:49:26,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:28,117 INFO L124 PetriNetUnfolderBase]: 3221/4798 cut-off events. [2024-06-20 15:49:28,117 INFO L125 PetriNetUnfolderBase]: For 374433/374439 co-relation queries the response was YES. [2024-06-20 15:49:28,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40427 conditions, 4798 events. 3221/4798 cut-off events. For 374433/374439 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 23807 event pairs, 711 based on Foata normal form. 10/4805 useless extension candidates. Maximal degree in co-relation 40342. Up to 4646 conditions per place. [2024-06-20 15:49:28,163 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 240 selfloop transitions, 31 changer transitions 0/274 dead transitions. [2024-06-20 15:49:28,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 274 transitions, 3285 flow [2024-06-20 15:49:28,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:49:28,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:49:28,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-20 15:49:28,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-20 15:49:28,165 INFO L175 Difference]: Start difference. First operand has 188 places, 231 transitions, 2571 flow. Second operand 10 states and 162 transitions. [2024-06-20 15:49:28,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 274 transitions, 3285 flow [2024-06-20 15:49:28,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 274 transitions, 3115 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-20 15:49:28,577 INFO L231 Difference]: Finished difference. Result has 191 places, 235 transitions, 2519 flow [2024-06-20 15:49:28,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2409, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2519, PETRI_PLACES=191, PETRI_TRANSITIONS=235} [2024-06-20 15:49:28,578 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-20 15:49:28,578 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 235 transitions, 2519 flow [2024-06-20 15:49:28,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:28,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:28,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:28,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 15:49:28,579 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:49:28,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:28,579 INFO L85 PathProgramCache]: Analyzing trace with hash 231660654, now seen corresponding path program 1 times [2024-06-20 15:49:28,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:28,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548815] [2024-06-20 15:49:28,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:28,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:30,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:30,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:30,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548815] [2024-06-20 15:49:30,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:30,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:30,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:49:30,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673054604] [2024-06-20 15:49:30,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:30,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:49:30,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:30,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:49:30,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:49:30,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:49:30,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 235 transitions, 2519 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:30,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:30,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:49:30,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:31,974 INFO L124 PetriNetUnfolderBase]: 3226/4805 cut-off events. [2024-06-20 15:49:31,974 INFO L125 PetriNetUnfolderBase]: For 383597/383603 co-relation queries the response was YES. [2024-06-20 15:49:31,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40521 conditions, 4805 events. 3226/4805 cut-off events. For 383597/383603 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 23780 event pairs, 725 based on Foata normal form. 7/4809 useless extension candidates. Maximal degree in co-relation 40435. Up to 4759 conditions per place. [2024-06-20 15:49:32,018 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 235 selfloop transitions, 17 changer transitions 0/255 dead transitions. [2024-06-20 15:49:32,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 255 transitions, 3125 flow [2024-06-20 15:49:32,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:49:32,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:49:32,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-20 15:49:32,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-20 15:49:32,020 INFO L175 Difference]: Start difference. First operand has 191 places, 235 transitions, 2519 flow. Second operand 7 states and 107 transitions. [2024-06-20 15:49:32,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 255 transitions, 3125 flow [2024-06-20 15:49:32,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 255 transitions, 3079 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 15:49:32,383 INFO L231 Difference]: Finished difference. Result has 192 places, 238 transitions, 2565 flow [2024-06-20 15:49:32,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2473, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2565, PETRI_PLACES=192, PETRI_TRANSITIONS=238} [2024-06-20 15:49:32,384 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-20 15:49:32,384 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 238 transitions, 2565 flow [2024-06-20 15:49:32,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:32,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:32,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:32,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 15:49:32,385 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:49:32,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:32,385 INFO L85 PathProgramCache]: Analyzing trace with hash 141981123, now seen corresponding path program 2 times [2024-06-20 15:49:32,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:32,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719049144] [2024-06-20 15:49:32,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:32,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:34,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:34,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719049144] [2024-06-20 15:49:34,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719049144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:34,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:34,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:49:34,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461882144] [2024-06-20 15:49:34,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:34,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:49:34,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:34,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:49:34,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:49:34,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:49:34,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 238 transitions, 2565 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:34,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:34,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:49:34,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:35,540 INFO L124 PetriNetUnfolderBase]: 3236/4820 cut-off events. [2024-06-20 15:49:35,540 INFO L125 PetriNetUnfolderBase]: For 397662/397662 co-relation queries the response was YES. [2024-06-20 15:49:35,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41249 conditions, 4820 events. 3236/4820 cut-off events. For 397662/397662 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 23872 event pairs, 729 based on Foata normal form. 2/4819 useless extension candidates. Maximal degree in co-relation 41161. Up to 4693 conditions per place. [2024-06-20 15:49:35,584 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 225 selfloop transitions, 30 changer transitions 0/258 dead transitions. [2024-06-20 15:49:35,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 258 transitions, 3181 flow [2024-06-20 15:49:35,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:49:35,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:49:35,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-20 15:49:35,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 15:49:35,585 INFO L175 Difference]: Start difference. First operand has 192 places, 238 transitions, 2565 flow. Second operand 7 states and 112 transitions. [2024-06-20 15:49:35,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 258 transitions, 3181 flow [2024-06-20 15:49:36,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 258 transitions, 3111 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 15:49:36,040 INFO L231 Difference]: Finished difference. Result has 194 places, 241 transitions, 2621 flow [2024-06-20 15:49:36,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2495, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2621, PETRI_PLACES=194, PETRI_TRANSITIONS=241} [2024-06-20 15:49:36,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-20 15:49:36,040 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 241 transitions, 2621 flow [2024-06-20 15:49:36,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:36,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:36,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:36,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 15:49:36,041 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:49:36,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:36,041 INFO L85 PathProgramCache]: Analyzing trace with hash 629188967, now seen corresponding path program 7 times [2024-06-20 15:49:36,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:36,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648435167] [2024-06-20 15:49:36,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:36,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:38,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:38,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:38,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648435167] [2024-06-20 15:49:38,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648435167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:38,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:38,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:49:38,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739160457] [2024-06-20 15:49:38,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:38,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:49:38,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:38,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:49:38,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:49:38,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:49:38,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 241 transitions, 2621 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:38,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:38,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:49:38,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:40,202 INFO L124 PetriNetUnfolderBase]: 3345/4999 cut-off events. [2024-06-20 15:49:40,202 INFO L125 PetriNetUnfolderBase]: For 452462/452486 co-relation queries the response was YES. [2024-06-20 15:49:40,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43422 conditions, 4999 events. 3345/4999 cut-off events. For 452462/452486 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 25115 event pairs, 740 based on Foata normal form. 44/5036 useless extension candidates. Maximal degree in co-relation 43333. Up to 4303 conditions per place. [2024-06-20 15:49:40,250 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 206 selfloop transitions, 78 changer transitions 0/287 dead transitions. [2024-06-20 15:49:40,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 287 transitions, 3831 flow [2024-06-20 15:49:40,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:49:40,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:49:40,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 15:49:40,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 15:49:40,252 INFO L175 Difference]: Start difference. First operand has 194 places, 241 transitions, 2621 flow. Second operand 9 states and 162 transitions. [2024-06-20 15:49:40,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 287 transitions, 3831 flow [2024-06-20 15:49:40,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 287 transitions, 3727 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 15:49:40,619 INFO L231 Difference]: Finished difference. Result has 198 places, 243 transitions, 2775 flow [2024-06-20 15:49:40,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2517, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2775, PETRI_PLACES=198, PETRI_TRANSITIONS=243} [2024-06-20 15:49:40,620 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-20 15:49:40,620 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 243 transitions, 2775 flow [2024-06-20 15:49:40,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:40,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:40,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:40,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 15:49:40,621 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:49:40,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:40,621 INFO L85 PathProgramCache]: Analyzing trace with hash 629396729, now seen corresponding path program 5 times [2024-06-20 15:49:40,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:40,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809051102] [2024-06-20 15:49:40,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:40,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:43,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:43,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809051102] [2024-06-20 15:49:43,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809051102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:43,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:43,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:49:43,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514657860] [2024-06-20 15:49:43,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:43,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:49:43,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:43,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:49:43,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:49:43,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:49:43,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 243 transitions, 2775 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:43,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:43,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:49:43,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:45,804 INFO L124 PetriNetUnfolderBase]: 3465/5173 cut-off events. [2024-06-20 15:49:45,805 INFO L125 PetriNetUnfolderBase]: For 449940/449964 co-relation queries the response was YES. [2024-06-20 15:49:45,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45525 conditions, 5173 events. 3465/5173 cut-off events. For 449940/449964 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 26178 event pairs, 738 based on Foata normal form. 20/5186 useless extension candidates. Maximal degree in co-relation 45435. Up to 4552 conditions per place. [2024-06-20 15:49:45,856 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 214 selfloop transitions, 85 changer transitions 0/302 dead transitions. [2024-06-20 15:49:45,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 302 transitions, 4324 flow [2024-06-20 15:49:45,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:49:45,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:49:45,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-20 15:49:45,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-20 15:49:45,859 INFO L175 Difference]: Start difference. First operand has 198 places, 243 transitions, 2775 flow. Second operand 10 states and 176 transitions. [2024-06-20 15:49:45,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 302 transitions, 4324 flow [2024-06-20 15:49:46,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 302 transitions, 4085 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-20 15:49:46,263 INFO L231 Difference]: Finished difference. Result has 203 places, 256 transitions, 2965 flow [2024-06-20 15:49:46,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2559, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2965, PETRI_PLACES=203, PETRI_TRANSITIONS=256} [2024-06-20 15:49:46,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-20 15:49:46,263 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 256 transitions, 2965 flow [2024-06-20 15:49:46,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:46,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:46,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:46,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 15:49:46,264 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:49:46,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:46,264 INFO L85 PathProgramCache]: Analyzing trace with hash 629404448, now seen corresponding path program 2 times [2024-06-20 15:49:46,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:46,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925628493] [2024-06-20 15:49:46,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:46,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:49,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:49,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:49,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925628493] [2024-06-20 15:49:49,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925628493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:49,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:49,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:49:49,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642510285] [2024-06-20 15:49:49,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:49,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:49:49,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:49,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:49:49,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:49:49,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:49:49,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 256 transitions, 2965 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:49,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:49,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:49:49,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:51,556 INFO L124 PetriNetUnfolderBase]: 3482/5200 cut-off events. [2024-06-20 15:49:51,556 INFO L125 PetriNetUnfolderBase]: For 457322/457346 co-relation queries the response was YES. [2024-06-20 15:49:51,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45822 conditions, 5200 events. 3482/5200 cut-off events. For 457322/457346 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 26286 event pairs, 765 based on Foata normal form. 20/5213 useless extension candidates. Maximal degree in co-relation 45729. Up to 5021 conditions per place. [2024-06-20 15:49:51,613 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 242 selfloop transitions, 47 changer transitions 0/292 dead transitions. [2024-06-20 15:49:51,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 292 transitions, 3739 flow [2024-06-20 15:49:51,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:49:51,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:49:51,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-20 15:49:51,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-20 15:49:51,615 INFO L175 Difference]: Start difference. First operand has 203 places, 256 transitions, 2965 flow. Second operand 10 states and 158 transitions. [2024-06-20 15:49:51,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 292 transitions, 3739 flow [2024-06-20 15:49:52,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 292 transitions, 3550 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 15:49:52,109 INFO L231 Difference]: Finished difference. Result has 208 places, 258 transitions, 2969 flow [2024-06-20 15:49:52,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2776, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2969, PETRI_PLACES=208, PETRI_TRANSITIONS=258} [2024-06-20 15:49:52,110 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-20 15:49:52,110 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 258 transitions, 2969 flow [2024-06-20 15:49:52,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:52,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:52,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:52,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 15:49:52,119 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:49:52,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:52,119 INFO L85 PathProgramCache]: Analyzing trace with hash 629194919, now seen corresponding path program 6 times [2024-06-20 15:49:52,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:52,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171794839] [2024-06-20 15:49:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:52,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:55,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:55,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171794839] [2024-06-20 15:49:55,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171794839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:55,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:55,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:49:55,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168461387] [2024-06-20 15:49:55,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:55,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:49:55,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:55,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:49:55,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:49:55,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:49:55,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 258 transitions, 2969 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:55,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:55,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:49:55,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:57,066 INFO L124 PetriNetUnfolderBase]: 3472/5186 cut-off events. [2024-06-20 15:49:57,066 INFO L125 PetriNetUnfolderBase]: For 469146/469170 co-relation queries the response was YES. [2024-06-20 15:49:57,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45607 conditions, 5186 events. 3472/5186 cut-off events. For 469146/469170 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 26330 event pairs, 747 based on Foata normal form. 20/5199 useless extension candidates. Maximal degree in co-relation 45513. Up to 4829 conditions per place. [2024-06-20 15:49:57,119 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 239 selfloop transitions, 61 changer transitions 0/303 dead transitions. [2024-06-20 15:49:57,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 303 transitions, 3762 flow [2024-06-20 15:49:57,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:49:57,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:49:57,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-20 15:49:57,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-20 15:49:57,124 INFO L175 Difference]: Start difference. First operand has 208 places, 258 transitions, 2969 flow. Second operand 10 states and 164 transitions. [2024-06-20 15:49:57,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 303 transitions, 3762 flow [2024-06-20 15:49:57,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 303 transitions, 3527 flow, removed 65 selfloop flow, removed 8 redundant places. [2024-06-20 15:49:57,657 INFO L231 Difference]: Finished difference. Result has 212 places, 265 transitions, 2970 flow [2024-06-20 15:49:57,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2734, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2970, PETRI_PLACES=212, PETRI_TRANSITIONS=265} [2024-06-20 15:49:57,658 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-20 15:49:57,658 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 265 transitions, 2970 flow [2024-06-20 15:49:57,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:57,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:57,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:57,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 15:49:57,659 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:49:57,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:57,659 INFO L85 PathProgramCache]: Analyzing trace with hash 885904958, now seen corresponding path program 3 times [2024-06-20 15:49:57,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:57,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309634130] [2024-06-20 15:49:57,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:57,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:01,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:01,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309634130] [2024-06-20 15:50:01,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309634130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:01,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:01,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:50:01,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292687495] [2024-06-20 15:50:01,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:01,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:50:01,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:01,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:50:01,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:50:01,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:50:01,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 265 transitions, 2970 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:01,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:01,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:50:01,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:03,282 INFO L124 PetriNetUnfolderBase]: 3489/5213 cut-off events. [2024-06-20 15:50:03,282 INFO L125 PetriNetUnfolderBase]: For 483575/483599 co-relation queries the response was YES. [2024-06-20 15:50:03,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46190 conditions, 5213 events. 3489/5213 cut-off events. For 483575/483599 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 26374 event pairs, 787 based on Foata normal form. 20/5226 useless extension candidates. Maximal degree in co-relation 46093. Up to 5034 conditions per place. [2024-06-20 15:50:03,338 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 249 selfloop transitions, 49 changer transitions 0/301 dead transitions. [2024-06-20 15:50:03,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 301 transitions, 3766 flow [2024-06-20 15:50:03,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:50:03,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:50:03,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-20 15:50:03,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738095238095238 [2024-06-20 15:50:03,340 INFO L175 Difference]: Start difference. First operand has 212 places, 265 transitions, 2970 flow. Second operand 10 states and 157 transitions. [2024-06-20 15:50:03,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 301 transitions, 3766 flow [2024-06-20 15:50:03,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 301 transitions, 3665 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 15:50:03,799 INFO L231 Difference]: Finished difference. Result has 216 places, 267 transitions, 3070 flow [2024-06-20 15:50:03,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2869, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3070, PETRI_PLACES=216, PETRI_TRANSITIONS=267} [2024-06-20 15:50:03,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-20 15:50:03,800 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 267 transitions, 3070 flow [2024-06-20 15:50:03,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:03,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:03,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:03,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 15:50:03,801 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:50:03,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:03,801 INFO L85 PathProgramCache]: Analyzing trace with hash 885897239, now seen corresponding path program 7 times [2024-06-20 15:50:03,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:03,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009657486] [2024-06-20 15:50:03,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:03,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:06,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:06,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009657486] [2024-06-20 15:50:06,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009657486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:06,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:06,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:50:06,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652622676] [2024-06-20 15:50:06,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:06,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:50:06,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:06,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:50:06,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:50:06,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:50:06,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 267 transitions, 3070 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:06,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:06,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:50:06,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:08,580 INFO L124 PetriNetUnfolderBase]: 3479/5199 cut-off events. [2024-06-20 15:50:08,580 INFO L125 PetriNetUnfolderBase]: For 496106/496130 co-relation queries the response was YES. [2024-06-20 15:50:08,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46242 conditions, 5199 events. 3479/5199 cut-off events. For 496106/496130 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 26359 event pairs, 738 based on Foata normal form. 20/5212 useless extension candidates. Maximal degree in co-relation 46144. Up to 4590 conditions per place. [2024-06-20 15:50:08,632 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 208 selfloop transitions, 100 changer transitions 0/311 dead transitions. [2024-06-20 15:50:08,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 311 transitions, 4068 flow [2024-06-20 15:50:08,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:50:08,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:50:08,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-20 15:50:08,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 15:50:08,634 INFO L175 Difference]: Start difference. First operand has 216 places, 267 transitions, 3070 flow. Second operand 10 states and 168 transitions. [2024-06-20 15:50:08,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 311 transitions, 4068 flow [2024-06-20 15:50:09,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 311 transitions, 3843 flow, removed 65 selfloop flow, removed 8 redundant places. [2024-06-20 15:50:09,087 INFO L231 Difference]: Finished difference. Result has 219 places, 272 transitions, 3125 flow [2024-06-20 15:50:09,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2845, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3125, PETRI_PLACES=219, PETRI_TRANSITIONS=272} [2024-06-20 15:50:09,088 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-20 15:50:09,088 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 272 transitions, 3125 flow [2024-06-20 15:50:09,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:09,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:09,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:09,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 15:50:09,092 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:50:09,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:09,094 INFO L85 PathProgramCache]: Analyzing trace with hash 895428158, now seen corresponding path program 4 times [2024-06-20 15:50:09,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:09,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507413268] [2024-06-20 15:50:09,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:09,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:12,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:12,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507413268] [2024-06-20 15:50:12,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507413268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:12,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:12,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:50:12,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278964945] [2024-06-20 15:50:12,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:12,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:50:12,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:12,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:50:12,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:50:12,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:50:12,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 272 transitions, 3125 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:12,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:12,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:50:12,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:13,832 INFO L124 PetriNetUnfolderBase]: 3496/5226 cut-off events. [2024-06-20 15:50:13,832 INFO L125 PetriNetUnfolderBase]: For 513048/513072 co-relation queries the response was YES. [2024-06-20 15:50:13,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47116 conditions, 5226 events. 3496/5226 cut-off events. For 513048/513072 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 26561 event pairs, 744 based on Foata normal form. 20/5239 useless extension candidates. Maximal degree in co-relation 47016. Up to 4896 conditions per place. [2024-06-20 15:50:13,884 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 238 selfloop transitions, 72 changer transitions 0/313 dead transitions. [2024-06-20 15:50:13,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 313 transitions, 4261 flow [2024-06-20 15:50:13,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:50:13,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:50:13,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-20 15:50:13,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-20 15:50:13,886 INFO L175 Difference]: Start difference. First operand has 219 places, 272 transitions, 3125 flow. Second operand 10 states and 161 transitions. [2024-06-20 15:50:13,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 313 transitions, 4261 flow [2024-06-20 15:50:14,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 313 transitions, 4026 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-20 15:50:14,374 INFO L231 Difference]: Finished difference. Result has 220 places, 276 transitions, 3237 flow [2024-06-20 15:50:14,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2890, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3237, PETRI_PLACES=220, PETRI_TRANSITIONS=276} [2024-06-20 15:50:14,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-20 15:50:14,375 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 276 transitions, 3237 flow [2024-06-20 15:50:14,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:14,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:14,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:14,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 15:50:14,375 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:50:14,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:14,376 INFO L85 PathProgramCache]: Analyzing trace with hash 886164428, now seen corresponding path program 5 times [2024-06-20 15:50:14,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:14,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678595108] [2024-06-20 15:50:14,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:14,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:17,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:17,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678595108] [2024-06-20 15:50:17,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678595108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:17,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:17,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:50:17,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399448778] [2024-06-20 15:50:17,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:17,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:50:17,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:17,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:50:17,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:50:17,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:50:17,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 276 transitions, 3237 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:17,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:17,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:50:17,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:19,525 INFO L124 PetriNetUnfolderBase]: 3513/5253 cut-off events. [2024-06-20 15:50:19,525 INFO L125 PetriNetUnfolderBase]: For 533061/533085 co-relation queries the response was YES. [2024-06-20 15:50:19,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47307 conditions, 5253 events. 3513/5253 cut-off events. For 533061/533085 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 26761 event pairs, 780 based on Foata normal form. 20/5266 useless extension candidates. Maximal degree in co-relation 47208. Up to 5029 conditions per place. [2024-06-20 15:50:19,580 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 246 selfloop transitions, 63 changer transitions 0/312 dead transitions. [2024-06-20 15:50:19,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 312 transitions, 4063 flow [2024-06-20 15:50:19,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:50:19,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:50:19,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-20 15:50:19,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-20 15:50:19,582 INFO L175 Difference]: Start difference. First operand has 220 places, 276 transitions, 3237 flow. Second operand 10 states and 158 transitions. [2024-06-20 15:50:19,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 312 transitions, 4063 flow [2024-06-20 15:50:20,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 312 transitions, 3871 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-20 15:50:20,169 INFO L231 Difference]: Finished difference. Result has 224 places, 278 transitions, 3282 flow [2024-06-20 15:50:20,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3057, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3282, PETRI_PLACES=224, PETRI_TRANSITIONS=278} [2024-06-20 15:50:20,170 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-20 15:50:20,170 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 278 transitions, 3282 flow [2024-06-20 15:50:20,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:20,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:20,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:20,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 15:50:20,171 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:50:20,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:20,171 INFO L85 PathProgramCache]: Analyzing trace with hash -2146285917, now seen corresponding path program 8 times [2024-06-20 15:50:20,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:20,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65317077] [2024-06-20 15:50:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:20,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:23,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:23,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:23,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65317077] [2024-06-20 15:50:23,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65317077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:23,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:23,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:50:23,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732348395] [2024-06-20 15:50:23,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:23,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:50:23,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:23,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:50:23,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:50:23,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:50:23,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 278 transitions, 3282 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:23,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:23,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:50:23,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:24,652 INFO L124 PetriNetUnfolderBase]: 3547/5310 cut-off events. [2024-06-20 15:50:24,652 INFO L125 PetriNetUnfolderBase]: For 557387/557402 co-relation queries the response was YES. [2024-06-20 15:50:24,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48023 conditions, 5310 events. 3547/5310 cut-off events. For 557387/557402 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 27108 event pairs, 754 based on Foata normal form. 14/5311 useless extension candidates. Maximal degree in co-relation 47922. Up to 4990 conditions per place. [2024-06-20 15:50:24,709 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 262 selfloop transitions, 48 changer transitions 0/313 dead transitions. [2024-06-20 15:50:24,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 313 transitions, 4122 flow [2024-06-20 15:50:24,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:50:24,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:50:24,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 15:50:24,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-20 15:50:24,711 INFO L175 Difference]: Start difference. First operand has 224 places, 278 transitions, 3282 flow. Second operand 9 states and 149 transitions. [2024-06-20 15:50:24,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 313 transitions, 4122 flow [2024-06-20 15:50:25,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 313 transitions, 3919 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-20 15:50:25,236 INFO L231 Difference]: Finished difference. Result has 225 places, 280 transitions, 3286 flow [2024-06-20 15:50:25,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3079, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3286, PETRI_PLACES=225, PETRI_TRANSITIONS=280} [2024-06-20 15:50:25,237 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-20 15:50:25,237 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 280 transitions, 3286 flow [2024-06-20 15:50:25,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:25,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:25,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:25,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 15:50:25,238 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:50:25,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:25,238 INFO L85 PathProgramCache]: Analyzing trace with hash -2146135815, now seen corresponding path program 8 times [2024-06-20 15:50:25,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:25,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740846503] [2024-06-20 15:50:25,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:25,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:28,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:28,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740846503] [2024-06-20 15:50:28,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740846503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:28,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:28,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:50:28,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631780226] [2024-06-20 15:50:28,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:28,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:50:28,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:28,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:50:28,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:50:28,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:50:28,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 280 transitions, 3286 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:28,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:28,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:50:28,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:30,167 INFO L124 PetriNetUnfolderBase]: 3537/5296 cut-off events. [2024-06-20 15:50:30,167 INFO L125 PetriNetUnfolderBase]: For 561992/562007 co-relation queries the response was YES. [2024-06-20 15:50:30,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47926 conditions, 5296 events. 3537/5296 cut-off events. For 561992/562007 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 27091 event pairs, 740 based on Foata normal form. 10/5293 useless extension candidates. Maximal degree in co-relation 47824. Up to 4999 conditions per place. [2024-06-20 15:50:30,224 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 264 selfloop transitions, 52 changer transitions 0/319 dead transitions. [2024-06-20 15:50:30,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 319 transitions, 4059 flow [2024-06-20 15:50:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:50:30,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:50:30,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-20 15:50:30,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-20 15:50:30,225 INFO L175 Difference]: Start difference. First operand has 225 places, 280 transitions, 3286 flow. Second operand 10 states and 163 transitions. [2024-06-20 15:50:30,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 319 transitions, 4059 flow [2024-06-20 15:50:31,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 319 transitions, 3867 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-20 15:50:31,037 INFO L231 Difference]: Finished difference. Result has 229 places, 283 transitions, 3239 flow [2024-06-20 15:50:31,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3097, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3239, PETRI_PLACES=229, PETRI_TRANSITIONS=283} [2024-06-20 15:50:31,038 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-20 15:50:31,038 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 283 transitions, 3239 flow [2024-06-20 15:50:31,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:31,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:31,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:31,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 15:50:31,039 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:50:31,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:31,039 INFO L85 PathProgramCache]: Analyzing trace with hash -2140779387, now seen corresponding path program 9 times [2024-06-20 15:50:31,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:31,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363413695] [2024-06-20 15:50:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:31,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:33,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:33,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363413695] [2024-06-20 15:50:33,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363413695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:33,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:33,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:50:33,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165016874] [2024-06-20 15:50:33,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:33,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:50:33,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:33,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:50:33,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:50:33,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:50:33,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 283 transitions, 3239 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:33,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:33,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:50:33,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:35,440 INFO L124 PetriNetUnfolderBase]: 3646/5472 cut-off events. [2024-06-20 15:50:35,441 INFO L125 PetriNetUnfolderBase]: For 628519/628543 co-relation queries the response was YES. [2024-06-20 15:50:35,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49763 conditions, 5472 events. 3646/5472 cut-off events. For 628519/628543 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 28269 event pairs, 786 based on Foata normal form. 44/5509 useless extension candidates. Maximal degree in co-relation 49659. Up to 5115 conditions per place. [2024-06-20 15:50:35,495 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 282 selfloop transitions, 39 changer transitions 0/324 dead transitions. [2024-06-20 15:50:35,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 324 transitions, 4367 flow [2024-06-20 15:50:35,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:50:35,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:50:35,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 15:50:35,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-20 15:50:35,510 INFO L175 Difference]: Start difference. First operand has 229 places, 283 transitions, 3239 flow. Second operand 9 states and 155 transitions. [2024-06-20 15:50:35,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 324 transitions, 4367 flow [2024-06-20 15:50:36,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 324 transitions, 4113 flow, removed 33 selfloop flow, removed 10 redundant places. [2024-06-20 15:50:36,231 INFO L231 Difference]: Finished difference. Result has 228 places, 285 transitions, 3181 flow [2024-06-20 15:50:36,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2985, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3181, PETRI_PLACES=228, PETRI_TRANSITIONS=285} [2024-06-20 15:50:36,231 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-20 15:50:36,231 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 285 transitions, 3181 flow [2024-06-20 15:50:36,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:36,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:36,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:36,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 15:50:36,232 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:50:36,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:36,232 INFO L85 PathProgramCache]: Analyzing trace with hash -2146289637, now seen corresponding path program 10 times [2024-06-20 15:50:36,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:36,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561374312] [2024-06-20 15:50:36,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:36,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:39,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:39,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561374312] [2024-06-20 15:50:39,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561374312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:39,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:39,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:50:39,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071858802] [2024-06-20 15:50:39,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:39,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:50:39,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:39,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:50:39,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:50:39,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:50:39,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 285 transitions, 3181 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:39,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:39,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:50:39,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:40,728 INFO L124 PetriNetUnfolderBase]: 3630/5451 cut-off events. [2024-06-20 15:50:40,728 INFO L125 PetriNetUnfolderBase]: For 603196/603211 co-relation queries the response was YES. [2024-06-20 15:50:40,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49064 conditions, 5451 events. 3630/5451 cut-off events. For 603196/603211 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 28191 event pairs, 756 based on Foata normal form. 14/5452 useless extension candidates. Maximal degree in co-relation 48961. Up to 5159 conditions per place. [2024-06-20 15:50:40,790 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 269 selfloop transitions, 47 changer transitions 0/319 dead transitions. [2024-06-20 15:50:40,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 319 transitions, 4029 flow [2024-06-20 15:50:40,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:50:40,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:50:40,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 15:50:40,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 15:50:40,793 INFO L175 Difference]: Start difference. First operand has 228 places, 285 transitions, 3181 flow. Second operand 9 states and 147 transitions. [2024-06-20 15:50:40,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 319 transitions, 4029 flow [2024-06-20 15:50:41,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 319 transitions, 3879 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-20 15:50:41,487 INFO L231 Difference]: Finished difference. Result has 230 places, 287 transitions, 3244 flow [2024-06-20 15:50:41,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3031, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3244, PETRI_PLACES=230, PETRI_TRANSITIONS=287} [2024-06-20 15:50:41,489 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-20 15:50:41,490 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 287 transitions, 3244 flow [2024-06-20 15:50:41,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:41,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:41,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:41,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 15:50:41,490 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:50:41,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:41,491 INFO L85 PathProgramCache]: Analyzing trace with hash -2140773435, now seen corresponding path program 9 times [2024-06-20 15:50:41,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:41,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898874825] [2024-06-20 15:50:41,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:41,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:44,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:44,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898874825] [2024-06-20 15:50:44,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898874825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:44,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:44,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:50:44,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766106770] [2024-06-20 15:50:44,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:44,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:50:44,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:44,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:50:44,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:50:44,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:50:44,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 287 transitions, 3244 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:44,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:44,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:50:44,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:46,363 INFO L124 PetriNetUnfolderBase]: 3674/5512 cut-off events. [2024-06-20 15:50:46,363 INFO L125 PetriNetUnfolderBase]: For 599787/599811 co-relation queries the response was YES. [2024-06-20 15:50:46,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49065 conditions, 5512 events. 3674/5512 cut-off events. For 599787/599811 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 28493 event pairs, 778 based on Foata normal form. 20/5525 useless extension candidates. Maximal degree in co-relation 48961. Up to 5285 conditions per place. [2024-06-20 15:50:46,422 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 285 selfloop transitions, 44 changer transitions 0/332 dead transitions. [2024-06-20 15:50:46,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 332 transitions, 4353 flow [2024-06-20 15:50:46,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:50:46,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:50:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-20 15:50:46,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-20 15:50:46,424 INFO L175 Difference]: Start difference. First operand has 230 places, 287 transitions, 3244 flow. Second operand 10 states and 166 transitions. [2024-06-20 15:50:46,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 332 transitions, 4353 flow [2024-06-20 15:50:47,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 332 transitions, 4158 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-20 15:50:47,072 INFO L231 Difference]: Finished difference. Result has 233 places, 293 transitions, 3236 flow [2024-06-20 15:50:47,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3049, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3236, PETRI_PLACES=233, PETRI_TRANSITIONS=293} [2024-06-20 15:50:47,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-20 15:50:47,079 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 293 transitions, 3236 flow [2024-06-20 15:50:47,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:47,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:47,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:47,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 15:50:47,080 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:50:47,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:47,080 INFO L85 PathProgramCache]: Analyzing trace with hash -2140571625, now seen corresponding path program 10 times [2024-06-20 15:50:47,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:47,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549629096] [2024-06-20 15:50:47,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:47,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:50,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:50,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:50,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549629096] [2024-06-20 15:50:50,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549629096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:50,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:50,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:50:50,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229186499] [2024-06-20 15:50:50,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:50,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:50:50,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:50,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:50:50,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:50:50,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:50:50,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 293 transitions, 3236 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:50,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:50,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:50:50,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:52,112 INFO L124 PetriNetUnfolderBase]: 3664/5498 cut-off events. [2024-06-20 15:50:52,112 INFO L125 PetriNetUnfolderBase]: For 603068/603092 co-relation queries the response was YES. [2024-06-20 15:50:52,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48579 conditions, 5498 events. 3664/5498 cut-off events. For 603068/603092 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 28409 event pairs, 778 based on Foata normal form. 20/5511 useless extension candidates. Maximal degree in co-relation 48474. Up to 5277 conditions per place. [2024-06-20 15:50:52,172 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 284 selfloop transitions, 43 changer transitions 0/330 dead transitions. [2024-06-20 15:50:52,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 330 transitions, 4012 flow [2024-06-20 15:50:52,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:50:52,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:50:52,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-20 15:50:52,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-20 15:50:52,173 INFO L175 Difference]: Start difference. First operand has 233 places, 293 transitions, 3236 flow. Second operand 10 states and 163 transitions. [2024-06-20 15:50:52,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 330 transitions, 4012 flow [2024-06-20 15:50:52,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 330 transitions, 3826 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-20 15:50:52,852 INFO L231 Difference]: Finished difference. Result has 235 places, 293 transitions, 3144 flow [2024-06-20 15:50:52,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3050, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3144, PETRI_PLACES=235, PETRI_TRANSITIONS=293} [2024-06-20 15:50:52,852 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-20 15:50:52,852 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 293 transitions, 3144 flow [2024-06-20 15:50:52,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:52,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:52,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:52,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 15:50:52,853 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:50:52,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:52,853 INFO L85 PathProgramCache]: Analyzing trace with hash -2140563906, now seen corresponding path program 6 times [2024-06-20 15:50:52,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:52,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418083080] [2024-06-20 15:50:52,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:52,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:55,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:55,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418083080] [2024-06-20 15:50:55,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418083080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:55,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:55,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:50:55,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967517695] [2024-06-20 15:50:55,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:55,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:50:55,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:55,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:50:55,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:50:56,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:50:56,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 293 transitions, 3144 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:56,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:56,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:50:56,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:57,777 INFO L124 PetriNetUnfolderBase]: 3656/5486 cut-off events. [2024-06-20 15:50:57,777 INFO L125 PetriNetUnfolderBase]: For 611373/611397 co-relation queries the response was YES. [2024-06-20 15:50:57,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48229 conditions, 5486 events. 3656/5486 cut-off events. For 611373/611397 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 28357 event pairs, 796 based on Foata normal form. 20/5499 useless extension candidates. Maximal degree in co-relation 48124. Up to 5370 conditions per place. [2024-06-20 15:50:57,833 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 294 selfloop transitions, 30 changer transitions 0/327 dead transitions. [2024-06-20 15:50:57,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 327 transitions, 3900 flow [2024-06-20 15:50:57,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:50:57,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:50:57,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-20 15:50:57,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-20 15:50:57,835 INFO L175 Difference]: Start difference. First operand has 235 places, 293 transitions, 3144 flow. Second operand 10 states and 155 transitions. [2024-06-20 15:50:57,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 327 transitions, 3900 flow [2024-06-20 15:50:58,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 327 transitions, 3730 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-20 15:50:58,553 INFO L231 Difference]: Finished difference. Result has 236 places, 293 transitions, 3041 flow [2024-06-20 15:50:58,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2974, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3041, PETRI_PLACES=236, PETRI_TRANSITIONS=293} [2024-06-20 15:50:58,553 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-20 15:50:58,553 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 293 transitions, 3041 flow [2024-06-20 15:50:58,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:58,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:58,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:58,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 15:50:58,554 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:50:58,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:58,555 INFO L85 PathProgramCache]: Analyzing trace with hash 526211956, now seen corresponding path program 2 times [2024-06-20 15:50:58,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:58,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216269726] [2024-06-20 15:50:58,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:58,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:00,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:00,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216269726] [2024-06-20 15:51:00,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216269726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:00,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:00,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:51:00,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178762658] [2024-06-20 15:51:00,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:00,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:51:00,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:00,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:51:00,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:51:00,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:51:00,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 293 transitions, 3041 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:00,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:00,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:51:00,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:02,091 INFO L124 PetriNetUnfolderBase]: 3661/5493 cut-off events. [2024-06-20 15:51:02,092 INFO L125 PetriNetUnfolderBase]: For 620659/620683 co-relation queries the response was YES. [2024-06-20 15:51:02,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48238 conditions, 5493 events. 3661/5493 cut-off events. For 620659/620683 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 28290 event pairs, 796 based on Foata normal form. 17/5503 useless extension candidates. Maximal degree in co-relation 48135. Up to 5430 conditions per place. [2024-06-20 15:51:02,155 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 282 selfloop transitions, 29 changer transitions 0/314 dead transitions. [2024-06-20 15:51:02,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 314 transitions, 3965 flow [2024-06-20 15:51:02,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:51:02,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:51:02,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-20 15:51:02,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-20 15:51:02,157 INFO L175 Difference]: Start difference. First operand has 236 places, 293 transitions, 3041 flow. Second operand 7 states and 105 transitions. [2024-06-20 15:51:02,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 314 transitions, 3965 flow [2024-06-20 15:51:02,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 314 transitions, 3794 flow, removed 15 selfloop flow, removed 12 redundant places. [2024-06-20 15:51:02,909 INFO L231 Difference]: Finished difference. Result has 232 places, 301 transitions, 3083 flow [2024-06-20 15:51:02,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2870, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3083, PETRI_PLACES=232, PETRI_TRANSITIONS=301} [2024-06-20 15:51:02,909 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-20 15:51:02,909 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 301 transitions, 3083 flow [2024-06-20 15:51:02,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:02,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:02,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:02,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 15:51:02,910 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:02,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:02,910 INFO L85 PathProgramCache]: Analyzing trace with hash -337270969, now seen corresponding path program 3 times [2024-06-20 15:51:02,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:02,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644877896] [2024-06-20 15:51:02,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:02,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:04,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:04,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644877896] [2024-06-20 15:51:04,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644877896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:04,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:04,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:51:04,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104563966] [2024-06-20 15:51:04,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:04,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:51:04,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:04,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:51:04,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:51:04,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:51:04,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 301 transitions, 3083 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:04,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:04,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:51:04,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:06,176 INFO L124 PetriNetUnfolderBase]: 3655/5488 cut-off events. [2024-06-20 15:51:06,177 INFO L125 PetriNetUnfolderBase]: For 637068/637083 co-relation queries the response was YES. [2024-06-20 15:51:06,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48437 conditions, 5488 events. 3655/5488 cut-off events. For 637068/637083 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 28289 event pairs, 811 based on Foata normal form. 8/5483 useless extension candidates. Maximal degree in co-relation 48333. Up to 5346 conditions per place. [2024-06-20 15:51:06,236 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 276 selfloop transitions, 37 changer transitions 0/316 dead transitions. [2024-06-20 15:51:06,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 316 transitions, 3807 flow [2024-06-20 15:51:06,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:51:06,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:51:06,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-20 15:51:06,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-20 15:51:06,237 INFO L175 Difference]: Start difference. First operand has 232 places, 301 transitions, 3083 flow. Second operand 7 states and 108 transitions. [2024-06-20 15:51:06,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 316 transitions, 3807 flow [2024-06-20 15:51:07,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 316 transitions, 3723 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-20 15:51:07,047 INFO L231 Difference]: Finished difference. Result has 236 places, 304 transitions, 3147 flow [2024-06-20 15:51:07,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2999, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3147, PETRI_PLACES=236, PETRI_TRANSITIONS=304} [2024-06-20 15:51:07,048 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-20 15:51:07,048 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 304 transitions, 3147 flow [2024-06-20 15:51:07,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:07,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:07,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:07,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 15:51:07,049 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:07,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:07,049 INFO L85 PathProgramCache]: Analyzing trace with hash -337270566, now seen corresponding path program 3 times [2024-06-20 15:51:07,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:07,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403694507] [2024-06-20 15:51:07,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:07,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:09,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:09,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403694507] [2024-06-20 15:51:09,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403694507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:09,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:09,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:51:09,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549164033] [2024-06-20 15:51:09,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:09,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:51:09,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:09,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:51:09,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:51:09,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:51:09,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 304 transitions, 3147 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:09,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:09,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:51:09,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:10,569 INFO L124 PetriNetUnfolderBase]: 3652/5481 cut-off events. [2024-06-20 15:51:10,569 INFO L125 PetriNetUnfolderBase]: For 648822/648846 co-relation queries the response was YES. [2024-06-20 15:51:10,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49002 conditions, 5481 events. 3652/5481 cut-off events. For 648822/648846 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 28244 event pairs, 795 based on Foata normal form. 17/5491 useless extension candidates. Maximal degree in co-relation 48896. Up to 5428 conditions per place. [2024-06-20 15:51:10,632 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 292 selfloop transitions, 22 changer transitions 0/317 dead transitions. [2024-06-20 15:51:10,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 317 transitions, 3822 flow [2024-06-20 15:51:10,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:51:10,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:51:10,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-20 15:51:10,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35034013605442177 [2024-06-20 15:51:10,633 INFO L175 Difference]: Start difference. First operand has 236 places, 304 transitions, 3147 flow. Second operand 7 states and 103 transitions. [2024-06-20 15:51:10,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 317 transitions, 3822 flow [2024-06-20 15:51:11,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 317 transitions, 3658 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-20 15:51:11,518 INFO L231 Difference]: Finished difference. Result has 238 places, 305 transitions, 3042 flow [2024-06-20 15:51:11,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3042, PETRI_PLACES=238, PETRI_TRANSITIONS=305} [2024-06-20 15:51:11,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-20 15:51:11,519 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 305 transitions, 3042 flow [2024-06-20 15:51:11,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:11,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:11,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:11,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 15:51:11,519 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:11,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:11,520 INFO L85 PathProgramCache]: Analyzing trace with hash 403608509, now seen corresponding path program 1 times [2024-06-20 15:51:11,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:11,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828685082] [2024-06-20 15:51:11,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:11,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:13,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:13,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:13,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828685082] [2024-06-20 15:51:13,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828685082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:13,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:13,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:51:13,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220231243] [2024-06-20 15:51:13,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:13,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:51:13,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:13,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:51:13,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:51:13,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 15:51:13,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 305 transitions, 3042 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:13,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:13,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 15:51:13,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:15,164 INFO L124 PetriNetUnfolderBase]: 3496/5332 cut-off events. [2024-06-20 15:51:15,165 INFO L125 PetriNetUnfolderBase]: For 667795/667795 co-relation queries the response was YES. [2024-06-20 15:51:15,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48042 conditions, 5332 events. 3496/5332 cut-off events. For 667795/667795 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 28129 event pairs, 756 based on Foata normal form. 3/5332 useless extension candidates. Maximal degree in co-relation 47935. Up to 5157 conditions per place. [2024-06-20 15:51:15,219 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 304 selfloop transitions, 14 changer transitions 0/326 dead transitions. [2024-06-20 15:51:15,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 326 transitions, 3822 flow [2024-06-20 15:51:15,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:51:15,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:51:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 15:51:15,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-20 15:51:15,221 INFO L175 Difference]: Start difference. First operand has 238 places, 305 transitions, 3042 flow. Second operand 7 states and 115 transitions. [2024-06-20 15:51:15,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 326 transitions, 3822 flow [2024-06-20 15:51:15,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 326 transitions, 3774 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 15:51:15,783 INFO L231 Difference]: Finished difference. Result has 240 places, 308 transitions, 3078 flow [2024-06-20 15:51:15,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2994, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3078, PETRI_PLACES=240, PETRI_TRANSITIONS=308} [2024-06-20 15:51:15,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-20 15:51:15,784 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 308 transitions, 3078 flow [2024-06-20 15:51:15,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:15,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:15,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:15,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 15:51:15,784 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:15,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:15,785 INFO L85 PathProgramCache]: Analyzing trace with hash 518599348, now seen corresponding path program 1 times [2024-06-20 15:51:15,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:15,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653564309] [2024-06-20 15:51:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:15,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:17,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:17,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653564309] [2024-06-20 15:51:17,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653564309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:17,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:17,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:51:17,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098119617] [2024-06-20 15:51:17,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:17,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:51:17,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:17,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:51:17,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:51:17,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 15:51:17,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 308 transitions, 3078 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:17,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:17,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 15:51:17,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:19,325 INFO L124 PetriNetUnfolderBase]: 3511/5353 cut-off events. [2024-06-20 15:51:19,325 INFO L125 PetriNetUnfolderBase]: For 685569/685569 co-relation queries the response was YES. [2024-06-20 15:51:19,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48818 conditions, 5353 events. 3511/5353 cut-off events. For 685569/685569 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 28235 event pairs, 756 based on Foata normal form. 3/5353 useless extension candidates. Maximal degree in co-relation 48710. Up to 5185 conditions per place. [2024-06-20 15:51:19,384 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 303 selfloop transitions, 14 changer transitions 0/325 dead transitions. [2024-06-20 15:51:19,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 325 transitions, 3802 flow [2024-06-20 15:51:19,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:51:19,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:51:19,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-20 15:51:19,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-20 15:51:19,386 INFO L175 Difference]: Start difference. First operand has 240 places, 308 transitions, 3078 flow. Second operand 7 states and 111 transitions. [2024-06-20 15:51:19,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 325 transitions, 3802 flow [2024-06-20 15:51:19,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 325 transitions, 3740 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 15:51:19,916 INFO L231 Difference]: Finished difference. Result has 242 places, 311 transitions, 3106 flow [2024-06-20 15:51:19,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3016, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3106, PETRI_PLACES=242, PETRI_TRANSITIONS=311} [2024-06-20 15:51:19,916 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-20 15:51:19,917 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 311 transitions, 3106 flow [2024-06-20 15:51:19,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:19,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:19,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:19,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 15:51:19,917 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:19,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:19,917 INFO L85 PathProgramCache]: Analyzing trace with hash 518599131, now seen corresponding path program 2 times [2024-06-20 15:51:19,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:19,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971009523] [2024-06-20 15:51:19,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:19,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:22,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:22,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:22,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971009523] [2024-06-20 15:51:22,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971009523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:22,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:22,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:51:22,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936994313] [2024-06-20 15:51:22,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:22,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:51:22,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:22,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:51:22,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:51:22,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 15:51:22,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 311 transitions, 3106 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:22,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:22,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 15:51:22,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:23,507 INFO L124 PetriNetUnfolderBase]: 3526/5374 cut-off events. [2024-06-20 15:51:23,508 INFO L125 PetriNetUnfolderBase]: For 701512/701512 co-relation queries the response was YES. [2024-06-20 15:51:23,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49504 conditions, 5374 events. 3526/5374 cut-off events. For 701512/701512 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 28348 event pairs, 756 based on Foata normal form. 3/5374 useless extension candidates. Maximal degree in co-relation 49395. Up to 5203 conditions per place. [2024-06-20 15:51:23,568 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 307 selfloop transitions, 14 changer transitions 0/329 dead transitions. [2024-06-20 15:51:23,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 329 transitions, 3890 flow [2024-06-20 15:51:23,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:51:23,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:51:23,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-20 15:51:23,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 15:51:23,570 INFO L175 Difference]: Start difference. First operand has 242 places, 311 transitions, 3106 flow. Second operand 7 states and 112 transitions. [2024-06-20 15:51:23,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 329 transitions, 3890 flow [2024-06-20 15:51:24,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 329 transitions, 3822 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 15:51:24,170 INFO L231 Difference]: Finished difference. Result has 244 places, 314 transitions, 3130 flow [2024-06-20 15:51:24,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3038, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3130, PETRI_PLACES=244, PETRI_TRANSITIONS=314} [2024-06-20 15:51:24,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-20 15:51:24,171 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 314 transitions, 3130 flow [2024-06-20 15:51:24,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:24,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:24,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:24,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 15:51:24,171 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:24,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:24,172 INFO L85 PathProgramCache]: Analyzing trace with hash 526217908, now seen corresponding path program 2 times [2024-06-20 15:51:24,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:24,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557427274] [2024-06-20 15:51:24,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:24,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:26,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:26,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557427274] [2024-06-20 15:51:26,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557427274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:26,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:26,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:51:26,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834903389] [2024-06-20 15:51:26,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:26,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:51:26,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:26,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:51:26,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:51:26,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 15:51:26,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 314 transitions, 3130 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:26,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:26,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 15:51:26,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:27,725 INFO L124 PetriNetUnfolderBase]: 3536/5390 cut-off events. [2024-06-20 15:51:27,725 INFO L125 PetriNetUnfolderBase]: For 720038/720038 co-relation queries the response was YES. [2024-06-20 15:51:27,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50176 conditions, 5390 events. 3536/5390 cut-off events. For 720038/720038 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 28418 event pairs, 754 based on Foata normal form. 3/5390 useless extension candidates. Maximal degree in co-relation 50066. Up to 5223 conditions per place. [2024-06-20 15:51:27,781 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 307 selfloop transitions, 16 changer transitions 0/331 dead transitions. [2024-06-20 15:51:27,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 331 transitions, 3878 flow [2024-06-20 15:51:27,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:51:27,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:51:27,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-20 15:51:27,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-20 15:51:27,783 INFO L175 Difference]: Start difference. First operand has 244 places, 314 transitions, 3130 flow. Second operand 7 states and 108 transitions. [2024-06-20 15:51:27,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 331 transitions, 3878 flow [2024-06-20 15:51:28,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 331 transitions, 3808 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 15:51:28,588 INFO L231 Difference]: Finished difference. Result has 247 places, 320 transitions, 3189 flow [2024-06-20 15:51:28,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3060, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3189, PETRI_PLACES=247, PETRI_TRANSITIONS=320} [2024-06-20 15:51:28,588 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-20 15:51:28,588 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 320 transitions, 3189 flow [2024-06-20 15:51:28,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:28,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:28,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:28,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 15:51:28,589 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:28,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:28,589 INFO L85 PathProgramCache]: Analyzing trace with hash 525950781, now seen corresponding path program 3 times [2024-06-20 15:51:28,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:28,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120082478] [2024-06-20 15:51:28,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:28,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:30,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:30,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120082478] [2024-06-20 15:51:30,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120082478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:30,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:30,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:51:30,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848877997] [2024-06-20 15:51:30,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:30,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:51:30,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:30,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:51:30,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:51:30,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 15:51:30,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 320 transitions, 3189 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:30,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:30,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 15:51:30,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:32,264 INFO L124 PetriNetUnfolderBase]: 3543/5400 cut-off events. [2024-06-20 15:51:32,264 INFO L125 PetriNetUnfolderBase]: For 733457/733457 co-relation queries the response was YES. [2024-06-20 15:51:32,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50833 conditions, 5400 events. 3543/5400 cut-off events. For 733457/733457 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 28452 event pairs, 754 based on Foata normal form. 3/5400 useless extension candidates. Maximal degree in co-relation 50721. Up to 5233 conditions per place. [2024-06-20 15:51:32,321 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 313 selfloop transitions, 14 changer transitions 0/335 dead transitions. [2024-06-20 15:51:32,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 335 transitions, 3983 flow [2024-06-20 15:51:32,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:51:32,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:51:32,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-20 15:51:32,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-20 15:51:32,323 INFO L175 Difference]: Start difference. First operand has 247 places, 320 transitions, 3189 flow. Second operand 7 states and 109 transitions. [2024-06-20 15:51:32,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 335 transitions, 3983 flow [2024-06-20 15:51:33,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 335 transitions, 3910 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 15:51:33,012 INFO L231 Difference]: Finished difference. Result has 250 places, 323 transitions, 3216 flow [2024-06-20 15:51:33,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3116, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3216, PETRI_PLACES=250, PETRI_TRANSITIONS=323} [2024-06-20 15:51:33,013 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-20 15:51:33,013 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 323 transitions, 3216 flow [2024-06-20 15:51:33,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:33,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:33,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:33,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 15:51:33,014 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:33,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:33,014 INFO L85 PathProgramCache]: Analyzing trace with hash 525950998, now seen corresponding path program 3 times [2024-06-20 15:51:33,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:33,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920121575] [2024-06-20 15:51:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:33,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:35,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:35,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920121575] [2024-06-20 15:51:35,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920121575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:35,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:35,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:51:35,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148587425] [2024-06-20 15:51:35,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:35,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:51:35,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:35,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:51:35,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:51:35,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 15:51:35,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 323 transitions, 3216 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:35,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:35,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 15:51:35,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:36,746 INFO L124 PetriNetUnfolderBase]: 3542/5399 cut-off events. [2024-06-20 15:51:36,746 INFO L125 PetriNetUnfolderBase]: For 746063/746063 co-relation queries the response was YES. [2024-06-20 15:51:36,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51150 conditions, 5399 events. 3542/5399 cut-off events. For 746063/746063 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 28523 event pairs, 753 based on Foata normal form. 3/5399 useless extension candidates. Maximal degree in co-relation 51037. Up to 5236 conditions per place. [2024-06-20 15:51:36,909 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 315 selfloop transitions, 14 changer transitions 0/337 dead transitions. [2024-06-20 15:51:36,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 337 transitions, 3972 flow [2024-06-20 15:51:36,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:51:36,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:51:36,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-20 15:51:36,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-20 15:51:36,911 INFO L175 Difference]: Start difference. First operand has 250 places, 323 transitions, 3216 flow. Second operand 7 states and 108 transitions. [2024-06-20 15:51:36,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 337 transitions, 3972 flow [2024-06-20 15:51:37,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 337 transitions, 3894 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-20 15:51:37,455 INFO L231 Difference]: Finished difference. Result has 252 places, 326 transitions, 3244 flow [2024-06-20 15:51:37,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3138, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3244, PETRI_PLACES=252, PETRI_TRANSITIONS=326} [2024-06-20 15:51:37,456 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-20 15:51:37,456 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 326 transitions, 3244 flow [2024-06-20 15:51:37,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:37,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:37,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:37,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 15:51:37,457 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:37,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:37,458 INFO L85 PathProgramCache]: Analyzing trace with hash 418625512, now seen corresponding path program 1 times [2024-06-20 15:51:37,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:37,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099613923] [2024-06-20 15:51:37,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:37,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:40,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:40,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:40,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099613923] [2024-06-20 15:51:40,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099613923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:40,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:40,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:51:40,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720289076] [2024-06-20 15:51:40,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:40,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:51:40,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:40,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:51:40,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:51:40,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:51:40,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 326 transitions, 3244 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:51:40,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:40,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:51:40,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:42,638 INFO L124 PetriNetUnfolderBase]: 3713/5566 cut-off events. [2024-06-20 15:51:42,639 INFO L125 PetriNetUnfolderBase]: For 756169/756175 co-relation queries the response was YES. [2024-06-20 15:51:42,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52772 conditions, 5566 events. 3713/5566 cut-off events. For 756169/756175 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 28671 event pairs, 742 based on Foata normal form. 8/5571 useless extension candidates. Maximal degree in co-relation 52658. Up to 5304 conditions per place. [2024-06-20 15:51:42,699 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 317 selfloop transitions, 50 changer transitions 0/370 dead transitions. [2024-06-20 15:51:42,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 370 transitions, 4144 flow [2024-06-20 15:51:42,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:51:42,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:51:42,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-20 15:51:42,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-20 15:51:42,700 INFO L175 Difference]: Start difference. First operand has 252 places, 326 transitions, 3244 flow. Second operand 10 states and 164 transitions. [2024-06-20 15:51:42,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 370 transitions, 4144 flow [2024-06-20 15:51:43,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 370 transitions, 4040 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-20 15:51:43,218 INFO L231 Difference]: Finished difference. Result has 258 places, 329 transitions, 3295 flow [2024-06-20 15:51:43,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3140, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3295, PETRI_PLACES=258, PETRI_TRANSITIONS=329} [2024-06-20 15:51:43,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-20 15:51:43,218 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 329 transitions, 3295 flow [2024-06-20 15:51:43,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:51:43,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:43,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:43,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 15:51:43,219 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:43,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:43,219 INFO L85 PathProgramCache]: Analyzing trace with hash -472621874, now seen corresponding path program 1 times [2024-06-20 15:51:43,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:43,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592365281] [2024-06-20 15:51:43,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:43,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:46,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:46,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592365281] [2024-06-20 15:51:46,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592365281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:46,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:46,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:51:46,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306208869] [2024-06-20 15:51:46,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:46,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:51:46,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:46,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:51:46,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:51:46,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:51:46,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 329 transitions, 3295 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:51:46,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:46,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:51:46,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:48,724 INFO L124 PetriNetUnfolderBase]: 3805/5718 cut-off events. [2024-06-20 15:51:48,725 INFO L125 PetriNetUnfolderBase]: For 829767/829773 co-relation queries the response was YES. [2024-06-20 15:51:48,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54550 conditions, 5718 events. 3805/5718 cut-off events. For 829767/829773 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29781 event pairs, 747 based on Foata normal form. 26/5741 useless extension candidates. Maximal degree in co-relation 54434. Up to 5359 conditions per place. [2024-06-20 15:51:48,793 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 336 selfloop transitions, 43 changer transitions 0/382 dead transitions. [2024-06-20 15:51:48,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 382 transitions, 4325 flow [2024-06-20 15:51:48,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:51:48,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:51:48,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-20 15:51:48,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-20 15:51:48,795 INFO L175 Difference]: Start difference. First operand has 258 places, 329 transitions, 3295 flow. Second operand 11 states and 182 transitions. [2024-06-20 15:51:48,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 382 transitions, 4325 flow [2024-06-20 15:51:49,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 382 transitions, 4083 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-20 15:51:49,736 INFO L231 Difference]: Finished difference. Result has 260 places, 332 transitions, 3237 flow [2024-06-20 15:51:49,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3053, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3237, PETRI_PLACES=260, PETRI_TRANSITIONS=332} [2024-06-20 15:51:49,736 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-20 15:51:49,737 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 332 transitions, 3237 flow [2024-06-20 15:51:49,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:51:49,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:49,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:49,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 15:51:49,737 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:49,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:49,737 INFO L85 PathProgramCache]: Analyzing trace with hash -559850596, now seen corresponding path program 1 times [2024-06-20 15:51:49,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:49,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893959426] [2024-06-20 15:51:49,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:49,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:51,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:51,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893959426] [2024-06-20 15:51:51,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893959426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:51,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:51,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:51:51,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496133919] [2024-06-20 15:51:51,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:51,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:51:51,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:51,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:51:51,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:51:52,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:51:52,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 332 transitions, 3237 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:52,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:52,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:51:52,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:53,528 INFO L124 PetriNetUnfolderBase]: 3815/5732 cut-off events. [2024-06-20 15:51:53,528 INFO L125 PetriNetUnfolderBase]: For 787395/787401 co-relation queries the response was YES. [2024-06-20 15:51:53,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54301 conditions, 5732 events. 3815/5732 cut-off events. For 787395/787401 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29841 event pairs, 781 based on Foata normal form. 8/5737 useless extension candidates. Maximal degree in co-relation 54185. Up to 5609 conditions per place. [2024-06-20 15:51:53,593 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 328 selfloop transitions, 29 changer transitions 0/360 dead transitions. [2024-06-20 15:51:53,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 360 transitions, 4089 flow [2024-06-20 15:51:53,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:51:53,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:51:53,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 15:51:53,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-20 15:51:53,595 INFO L175 Difference]: Start difference. First operand has 260 places, 332 transitions, 3237 flow. Second operand 8 states and 127 transitions. [2024-06-20 15:51:53,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 360 transitions, 4089 flow [2024-06-20 15:51:54,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 360 transitions, 3957 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-20 15:51:54,317 INFO L231 Difference]: Finished difference. Result has 259 places, 335 transitions, 3231 flow [2024-06-20 15:51:54,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3105, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3231, PETRI_PLACES=259, PETRI_TRANSITIONS=335} [2024-06-20 15:51:54,317 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-20 15:51:54,318 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 335 transitions, 3231 flow [2024-06-20 15:51:54,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:54,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:54,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:54,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 15:51:54,318 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:54,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:54,318 INFO L85 PathProgramCache]: Analyzing trace with hash -387256082, now seen corresponding path program 1 times [2024-06-20 15:51:54,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:54,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310984118] [2024-06-20 15:51:54,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:54,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:56,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:56,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310984118] [2024-06-20 15:51:56,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310984118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:56,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:56,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:51:56,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055133510] [2024-06-20 15:51:56,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:56,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:51:56,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:56,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:51:56,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:51:56,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:51:56,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 335 transitions, 3231 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:56,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:56,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:51:56,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:57,620 INFO L124 PetriNetUnfolderBase]: 3820/5739 cut-off events. [2024-06-20 15:51:57,621 INFO L125 PetriNetUnfolderBase]: For 793684/793690 co-relation queries the response was YES. [2024-06-20 15:51:57,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54415 conditions, 5739 events. 3820/5739 cut-off events. For 793684/793690 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 29912 event pairs, 780 based on Foata normal form. 7/5743 useless extension candidates. Maximal degree in co-relation 54298. Up to 5684 conditions per place. [2024-06-20 15:51:57,692 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 338 selfloop transitions, 17 changer transitions 0/358 dead transitions. [2024-06-20 15:51:57,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 358 transitions, 4097 flow [2024-06-20 15:51:57,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:51:57,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:51:57,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-20 15:51:57,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-20 15:51:57,693 INFO L175 Difference]: Start difference. First operand has 259 places, 335 transitions, 3231 flow. Second operand 7 states and 110 transitions. [2024-06-20 15:51:57,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 358 transitions, 4097 flow [2024-06-20 15:51:58,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 358 transitions, 3993 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 15:51:58,440 INFO L231 Difference]: Finished difference. Result has 260 places, 338 transitions, 3263 flow [2024-06-20 15:51:58,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3127, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3263, PETRI_PLACES=260, PETRI_TRANSITIONS=338} [2024-06-20 15:51:58,441 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-20 15:51:58,441 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 338 transitions, 3263 flow [2024-06-20 15:51:58,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:58,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:58,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:58,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 15:51:58,442 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:58,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:58,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1096773990, now seen corresponding path program 2 times [2024-06-20 15:51:58,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:58,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703004704] [2024-06-20 15:51:58,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:58,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:00,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:00,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703004704] [2024-06-20 15:52:00,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703004704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:00,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:00,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:52:00,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832515870] [2024-06-20 15:52:00,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:00,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:52:00,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:00,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:52:00,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:52:00,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:52:00,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 338 transitions, 3263 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:00,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:00,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:52:00,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:01,687 INFO L124 PetriNetUnfolderBase]: 3825/5746 cut-off events. [2024-06-20 15:52:01,688 INFO L125 PetriNetUnfolderBase]: For 813328/813334 co-relation queries the response was YES. [2024-06-20 15:52:01,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54976 conditions, 5746 events. 3825/5746 cut-off events. For 813328/813334 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 29942 event pairs, 780 based on Foata normal form. 7/5750 useless extension candidates. Maximal degree in co-relation 54858. Up to 5700 conditions per place. [2024-06-20 15:52:01,757 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 338 selfloop transitions, 17 changer transitions 0/358 dead transitions. [2024-06-20 15:52:01,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 358 transitions, 4125 flow [2024-06-20 15:52:01,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:52:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:52:01,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-20 15:52:01,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-20 15:52:01,758 INFO L175 Difference]: Start difference. First operand has 260 places, 338 transitions, 3263 flow. Second operand 7 states and 107 transitions. [2024-06-20 15:52:01,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 358 transitions, 4125 flow [2024-06-20 15:52:02,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 358 transitions, 4011 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-20 15:52:02,607 INFO L231 Difference]: Finished difference. Result has 262 places, 341 transitions, 3291 flow [2024-06-20 15:52:02,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3149, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3291, PETRI_PLACES=262, PETRI_TRANSITIONS=341} [2024-06-20 15:52:02,608 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-20 15:52:02,608 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 341 transitions, 3291 flow [2024-06-20 15:52:02,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:02,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:02,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:02,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 15:52:02,609 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:52:02,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:02,609 INFO L85 PathProgramCache]: Analyzing trace with hash -2058582612, now seen corresponding path program 2 times [2024-06-20 15:52:02,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:02,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751138413] [2024-06-20 15:52:02,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:02,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:05,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:05,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:05,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751138413] [2024-06-20 15:52:05,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751138413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:05,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:05,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:52:05,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204001016] [2024-06-20 15:52:05,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:05,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:52:05,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:05,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:52:05,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:52:05,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:52:05,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 341 transitions, 3291 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:52:05,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:05,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:52:05,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:07,885 INFO L124 PetriNetUnfolderBase]: 3917/5899 cut-off events. [2024-06-20 15:52:07,885 INFO L125 PetriNetUnfolderBase]: For 890801/890801 co-relation queries the response was YES. [2024-06-20 15:52:07,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56747 conditions, 5899 events. 3917/5899 cut-off events. For 890801/890801 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 31058 event pairs, 759 based on Foata normal form. 20/5916 useless extension candidates. Maximal degree in co-relation 56628. Up to 5503 conditions per place. [2024-06-20 15:52:07,957 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 336 selfloop transitions, 47 changer transitions 0/386 dead transitions. [2024-06-20 15:52:07,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 386 transitions, 4303 flow [2024-06-20 15:52:07,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:52:07,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:52:07,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-20 15:52:07,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 15:52:07,959 INFO L175 Difference]: Start difference. First operand has 262 places, 341 transitions, 3291 flow. Second operand 10 states and 168 transitions. [2024-06-20 15:52:07,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 386 transitions, 4303 flow [2024-06-20 15:52:08,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 386 transitions, 4183 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-20 15:52:08,964 INFO L231 Difference]: Finished difference. Result has 267 places, 344 transitions, 3365 flow [2024-06-20 15:52:08,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3171, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3365, PETRI_PLACES=267, PETRI_TRANSITIONS=344} [2024-06-20 15:52:08,965 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-20 15:52:08,965 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 344 transitions, 3365 flow [2024-06-20 15:52:08,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:52:08,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:08,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:08,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 15:52:08,966 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:52:08,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:08,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1892348832, now seen corresponding path program 3 times [2024-06-20 15:52:08,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:08,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223357795] [2024-06-20 15:52:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:08,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:08,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:12,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:12,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:12,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223357795] [2024-06-20 15:52:12,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223357795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:12,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:12,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:52:12,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978277449] [2024-06-20 15:52:12,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:12,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:52:12,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:12,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:52:12,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:52:12,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:52:12,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 344 transitions, 3365 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:52:12,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:12,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:52:12,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:14,090 INFO L124 PetriNetUnfolderBase]: 4009/6050 cut-off events. [2024-06-20 15:52:14,090 INFO L125 PetriNetUnfolderBase]: For 926680/926686 co-relation queries the response was YES. [2024-06-20 15:52:14,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58536 conditions, 6050 events. 4009/6050 cut-off events. For 926680/926686 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 32181 event pairs, 805 based on Foata normal form. 26/6073 useless extension candidates. Maximal degree in co-relation 58416. Up to 5710 conditions per place. [2024-06-20 15:52:14,155 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 350 selfloop transitions, 42 changer transitions 0/395 dead transitions. [2024-06-20 15:52:14,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 395 transitions, 4443 flow [2024-06-20 15:52:14,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:52:14,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:52:14,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-20 15:52:14,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-20 15:52:14,158 INFO L175 Difference]: Start difference. First operand has 267 places, 344 transitions, 3365 flow. Second operand 11 states and 183 transitions. [2024-06-20 15:52:14,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 395 transitions, 4443 flow [2024-06-20 15:52:14,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 395 transitions, 4301 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-20 15:52:14,998 INFO L231 Difference]: Finished difference. Result has 270 places, 347 transitions, 3431 flow [2024-06-20 15:52:14,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3223, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3431, PETRI_PLACES=270, PETRI_TRANSITIONS=347} [2024-06-20 15:52:14,998 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-20 15:52:14,999 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 347 transitions, 3431 flow [2024-06-20 15:52:14,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:52:14,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:14,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:14,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 15:52:14,999 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:52:14,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:15,000 INFO L85 PathProgramCache]: Analyzing trace with hash 102917522, now seen corresponding path program 4 times [2024-06-20 15:52:15,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:15,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716123889] [2024-06-20 15:52:15,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:15,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:17,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:17,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716123889] [2024-06-20 15:52:17,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716123889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:17,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:17,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:52:17,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915293072] [2024-06-20 15:52:17,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:17,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:52:17,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:17,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:52:17,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:52:17,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:52:17,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 347 transitions, 3431 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:17,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:17,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:52:17,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:19,871 INFO L124 PetriNetUnfolderBase]: 4195/6356 cut-off events. [2024-06-20 15:52:19,871 INFO L125 PetriNetUnfolderBase]: For 1004259/1004265 co-relation queries the response was YES. [2024-06-20 15:52:19,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62700 conditions, 6356 events. 4195/6356 cut-off events. For 1004259/1004265 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 34365 event pairs, 831 based on Foata normal form. 22/6375 useless extension candidates. Maximal degree in co-relation 62579. Up to 5582 conditions per place. [2024-06-20 15:52:19,942 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 354 selfloop transitions, 42 changer transitions 0/399 dead transitions. [2024-06-20 15:52:19,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 399 transitions, 4901 flow [2024-06-20 15:52:19,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:52:19,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:52:19,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-20 15:52:19,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 15:52:19,944 INFO L175 Difference]: Start difference. First operand has 270 places, 347 transitions, 3431 flow. Second operand 10 states and 170 transitions. [2024-06-20 15:52:19,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 399 transitions, 4901 flow [2024-06-20 15:52:20,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 399 transitions, 4767 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-20 15:52:20,691 INFO L231 Difference]: Finished difference. Result has 272 places, 350 transitions, 3590 flow [2024-06-20 15:52:20,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3297, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3590, PETRI_PLACES=272, PETRI_TRANSITIONS=350} [2024-06-20 15:52:20,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-20 15:52:20,692 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 350 transitions, 3590 flow [2024-06-20 15:52:20,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:20,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:20,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:20,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 15:52:20,692 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:52:20,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:20,692 INFO L85 PathProgramCache]: Analyzing trace with hash 102678512, now seen corresponding path program 5 times [2024-06-20 15:52:20,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:20,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373664624] [2024-06-20 15:52:20,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:20,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:23,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:23,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373664624] [2024-06-20 15:52:23,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373664624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:23,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:23,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:52:23,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555462031] [2024-06-20 15:52:23,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:23,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:52:23,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:23,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:52:23,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:52:23,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:52:23,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 350 transitions, 3590 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:52:23,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:23,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:52:23,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:26,018 INFO L124 PetriNetUnfolderBase]: 4220/6403 cut-off events. [2024-06-20 15:52:26,018 INFO L125 PetriNetUnfolderBase]: For 1013623/1013629 co-relation queries the response was YES. [2024-06-20 15:52:26,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62512 conditions, 6403 events. 4220/6403 cut-off events. For 1013623/1013629 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 34815 event pairs, 859 based on Foata normal form. 26/6426 useless extension candidates. Maximal degree in co-relation 62389. Up to 5943 conditions per place. [2024-06-20 15:52:26,096 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 356 selfloop transitions, 41 changer transitions 0/400 dead transitions. [2024-06-20 15:52:26,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 400 transitions, 4663 flow [2024-06-20 15:52:26,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:52:26,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:52:26,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-20 15:52:26,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-20 15:52:26,098 INFO L175 Difference]: Start difference. First operand has 272 places, 350 transitions, 3590 flow. Second operand 11 states and 182 transitions. [2024-06-20 15:52:26,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 400 transitions, 4663 flow [2024-06-20 15:52:27,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 400 transitions, 4511 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:27,011 INFO L231 Difference]: Finished difference. Result has 277 places, 352 transitions, 3629 flow [2024-06-20 15:52:27,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3440, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3629, PETRI_PLACES=277, PETRI_TRANSITIONS=352} [2024-06-20 15:52:27,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-20 15:52:27,012 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 352 transitions, 3629 flow [2024-06-20 15:52:27,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:52:27,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:27,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:27,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 15:52:27,013 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:52:27,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:27,013 INFO L85 PathProgramCache]: Analyzing trace with hash 106449110, now seen corresponding path program 2 times [2024-06-20 15:52:27,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:27,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362568816] [2024-06-20 15:52:27,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:27,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:27,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:29,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:29,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:29,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362568816] [2024-06-20 15:52:29,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362568816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:29,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:29,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:29,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752424242] [2024-06-20 15:52:29,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:29,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:29,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:29,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:29,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:29,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:52:29,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 352 transitions, 3629 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:29,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:29,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:52:29,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:30,961 INFO L124 PetriNetUnfolderBase]: 4230/6418 cut-off events. [2024-06-20 15:52:30,961 INFO L125 PetriNetUnfolderBase]: For 980293/980293 co-relation queries the response was YES. [2024-06-20 15:52:31,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62605 conditions, 6418 events. 4230/6418 cut-off events. For 980293/980293 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 34923 event pairs, 901 based on Foata normal form. 2/6417 useless extension candidates. Maximal degree in co-relation 62480. Up to 6283 conditions per place. [2024-06-20 15:52:31,041 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 338 selfloop transitions, 33 changer transitions 0/374 dead transitions. [2024-06-20 15:52:31,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 374 transitions, 4491 flow [2024-06-20 15:52:31,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:31,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:31,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-20 15:52:31,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-20 15:52:31,042 INFO L175 Difference]: Start difference. First operand has 277 places, 352 transitions, 3629 flow. Second operand 8 states and 124 transitions. [2024-06-20 15:52:31,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 374 transitions, 4491 flow [2024-06-20 15:52:31,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 374 transitions, 4347 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-20 15:52:31,988 INFO L231 Difference]: Finished difference. Result has 276 places, 355 transitions, 3625 flow [2024-06-20 15:52:31,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3485, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3625, PETRI_PLACES=276, PETRI_TRANSITIONS=355} [2024-06-20 15:52:31,989 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-20 15:52:31,989 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 355 transitions, 3625 flow [2024-06-20 15:52:31,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:31,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:31,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:31,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 15:52:31,990 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:52:31,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:31,990 INFO L85 PathProgramCache]: Analyzing trace with hash 106461634, now seen corresponding path program 1 times [2024-06-20 15:52:31,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:31,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543193372] [2024-06-20 15:52:31,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:31,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:34,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:34,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:34,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543193372] [2024-06-20 15:52:34,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543193372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:34,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:34,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:34,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336140582] [2024-06-20 15:52:34,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:34,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:34,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:34,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:34,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:34,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:52:34,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 355 transitions, 3625 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:34,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:34,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:52:34,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:36,128 INFO L124 PetriNetUnfolderBase]: 4235/6424 cut-off events. [2024-06-20 15:52:36,128 INFO L125 PetriNetUnfolderBase]: For 983948/983954 co-relation queries the response was YES. [2024-06-20 15:52:36,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62688 conditions, 6424 events. 4235/6424 cut-off events. For 983948/983954 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 34927 event pairs, 898 based on Foata normal form. 7/6428 useless extension candidates. Maximal degree in co-relation 62562. Up to 6375 conditions per place. [2024-06-20 15:52:36,207 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 353 selfloop transitions, 20 changer transitions 0/376 dead transitions. [2024-06-20 15:52:36,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 376 transitions, 4503 flow [2024-06-20 15:52:36,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:36,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:36,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-20 15:52:36,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-06-20 15:52:36,209 INFO L175 Difference]: Start difference. First operand has 276 places, 355 transitions, 3625 flow. Second operand 8 states and 118 transitions. [2024-06-20 15:52:36,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 376 transitions, 4503 flow [2024-06-20 15:52:37,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 376 transitions, 4385 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:37,305 INFO L231 Difference]: Finished difference. Result has 278 places, 358 transitions, 3633 flow [2024-06-20 15:52:37,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3507, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3633, PETRI_PLACES=278, PETRI_TRANSITIONS=358} [2024-06-20 15:52:37,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-20 15:52:37,306 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 358 transitions, 3633 flow [2024-06-20 15:52:37,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:37,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:37,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:37,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 15:52:37,306 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:52:37,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:37,307 INFO L85 PathProgramCache]: Analyzing trace with hash -387010438, now seen corresponding path program 3 times [2024-06-20 15:52:37,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:37,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864588807] [2024-06-20 15:52:37,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:37,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:39,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:39,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864588807] [2024-06-20 15:52:39,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864588807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:39,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:39,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:39,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018543634] [2024-06-20 15:52:39,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:39,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:39,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:39,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:39,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:39,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:52:39,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 358 transitions, 3633 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:39,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:39,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:52:39,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:41,401 INFO L124 PetriNetUnfolderBase]: 4245/6439 cut-off events. [2024-06-20 15:52:41,401 INFO L125 PetriNetUnfolderBase]: For 998630/998630 co-relation queries the response was YES. [2024-06-20 15:52:41,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63277 conditions, 6439 events. 4245/6439 cut-off events. For 998630/998630 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 34950 event pairs, 900 based on Foata normal form. 2/6438 useless extension candidates. Maximal degree in co-relation 63150. Up to 6287 conditions per place. [2024-06-20 15:52:41,475 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 336 selfloop transitions, 41 changer transitions 0/380 dead transitions. [2024-06-20 15:52:41,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 380 transitions, 4515 flow [2024-06-20 15:52:41,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:41,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:41,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-20 15:52:41,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-20 15:52:41,476 INFO L175 Difference]: Start difference. First operand has 278 places, 358 transitions, 3633 flow. Second operand 8 states and 125 transitions. [2024-06-20 15:52:41,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 380 transitions, 4515 flow [2024-06-20 15:52:42,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 380 transitions, 4411 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:42,655 INFO L231 Difference]: Finished difference. Result has 280 places, 361 transitions, 3693 flow [2024-06-20 15:52:42,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3529, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3693, PETRI_PLACES=280, PETRI_TRANSITIONS=361} [2024-06-20 15:52:42,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-20 15:52:42,656 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 361 transitions, 3693 flow [2024-06-20 15:52:42,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:42,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:42,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:42,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 15:52:42,657 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:52:42,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:42,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1295896290, now seen corresponding path program 3 times [2024-06-20 15:52:42,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:42,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305445729] [2024-06-20 15:52:42,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:42,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:44,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:44,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:44,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305445729] [2024-06-20 15:52:44,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305445729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:44,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:44,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:52:44,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978915988] [2024-06-20 15:52:44,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:44,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:52:44,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:44,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:52:44,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:52:44,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:52:44,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 361 transitions, 3693 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:44,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:44,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:52:44,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:46,062 INFO L124 PetriNetUnfolderBase]: 4250/6446 cut-off events. [2024-06-20 15:52:46,062 INFO L125 PetriNetUnfolderBase]: For 1016886/1016910 co-relation queries the response was YES. [2024-06-20 15:52:46,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64091 conditions, 6446 events. 4250/6446 cut-off events. For 1016886/1016910 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 35036 event pairs, 901 based on Foata normal form. 17/6456 useless extension candidates. Maximal degree in co-relation 63963. Up to 6372 conditions per place. [2024-06-20 15:52:46,133 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 357 selfloop transitions, 22 changer transitions 0/382 dead transitions. [2024-06-20 15:52:46,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 382 transitions, 4615 flow [2024-06-20 15:52:46,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:52:46,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:52:46,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-20 15:52:46,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-20 15:52:46,135 INFO L175 Difference]: Start difference. First operand has 280 places, 361 transitions, 3693 flow. Second operand 7 states and 109 transitions. [2024-06-20 15:52:46,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 382 transitions, 4615 flow [2024-06-20 15:52:47,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 382 transitions, 4473 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:47,240 INFO L231 Difference]: Finished difference. Result has 281 places, 364 transitions, 3711 flow [2024-06-20 15:52:47,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3551, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3711, PETRI_PLACES=281, PETRI_TRANSITIONS=364} [2024-06-20 15:52:47,240 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-20 15:52:47,241 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 364 transitions, 3711 flow [2024-06-20 15:52:47,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:47,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:47,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:47,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 15:52:47,241 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:52:47,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:47,242 INFO L85 PathProgramCache]: Analyzing trace with hash 757238338, now seen corresponding path program 4 times [2024-06-20 15:52:47,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:47,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268015148] [2024-06-20 15:52:47,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:47,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:49,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:49,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268015148] [2024-06-20 15:52:49,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268015148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:49,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:49,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:52:49,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913710754] [2024-06-20 15:52:49,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:49,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:52:49,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:49,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:52:49,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:52:49,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:52:49,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 364 transitions, 3711 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:49,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:49,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:52:49,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:50,646 INFO L124 PetriNetUnfolderBase]: 4255/6453 cut-off events. [2024-06-20 15:52:50,646 INFO L125 PetriNetUnfolderBase]: For 1038793/1038817 co-relation queries the response was YES. [2024-06-20 15:52:50,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64636 conditions, 6453 events. 4255/6453 cut-off events. For 1038793/1038817 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 35051 event pairs, 901 based on Foata normal form. 17/6463 useless extension candidates. Maximal degree in co-relation 64507. Up to 6370 conditions per place. [2024-06-20 15:52:50,735 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 349 selfloop transitions, 30 changer transitions 0/382 dead transitions. [2024-06-20 15:52:50,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 382 transitions, 4629 flow [2024-06-20 15:52:50,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:52:50,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:52:50,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-20 15:52:50,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-20 15:52:50,736 INFO L175 Difference]: Start difference. First operand has 281 places, 364 transitions, 3711 flow. Second operand 7 states and 107 transitions. [2024-06-20 15:52:50,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 382 transitions, 4629 flow [2024-06-20 15:52:51,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 382 transitions, 4491 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-20 15:52:51,877 INFO L231 Difference]: Finished difference. Result has 283 places, 367 transitions, 3755 flow [2024-06-20 15:52:51,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3573, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3755, PETRI_PLACES=283, PETRI_TRANSITIONS=367} [2024-06-20 15:52:51,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-20 15:52:51,878 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 367 transitions, 3755 flow [2024-06-20 15:52:51,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:51,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:51,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:51,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 15:52:51,878 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:52:51,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:51,879 INFO L85 PathProgramCache]: Analyzing trace with hash -875608892, now seen corresponding path program 5 times [2024-06-20 15:52:51,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:51,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843234430] [2024-06-20 15:52:51,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:51,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:53,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:53,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843234430] [2024-06-20 15:52:53,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843234430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:53,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:53,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:52:53,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688690510] [2024-06-20 15:52:53,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:53,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:52:53,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:53,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:52:53,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:52:53,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:52:53,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 367 transitions, 3755 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:53,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:53,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:52:53,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:55,360 INFO L124 PetriNetUnfolderBase]: 4260/6460 cut-off events. [2024-06-20 15:52:55,360 INFO L125 PetriNetUnfolderBase]: For 1061517/1061541 co-relation queries the response was YES. [2024-06-20 15:52:55,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65267 conditions, 6460 events. 4260/6460 cut-off events. For 1061517/1061541 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 35074 event pairs, 901 based on Foata normal form. 17/6470 useless extension candidates. Maximal degree in co-relation 65137. Up to 6407 conditions per place. [2024-06-20 15:52:55,437 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 357 selfloop transitions, 22 changer transitions 0/382 dead transitions. [2024-06-20 15:52:55,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 382 transitions, 4669 flow [2024-06-20 15:52:55,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:52:55,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:52:55,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-20 15:52:55,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35034013605442177 [2024-06-20 15:52:55,438 INFO L175 Difference]: Start difference. First operand has 283 places, 367 transitions, 3755 flow. Second operand 7 states and 103 transitions. [2024-06-20 15:52:55,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 382 transitions, 4669 flow [2024-06-20 15:52:56,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 382 transitions, 4509 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-20 15:52:56,766 INFO L231 Difference]: Finished difference. Result has 285 places, 370 transitions, 3767 flow [2024-06-20 15:52:56,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3595, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3767, PETRI_PLACES=285, PETRI_TRANSITIONS=370} [2024-06-20 15:52:56,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-20 15:52:56,766 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 370 transitions, 3767 flow [2024-06-20 15:52:56,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:56,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:56,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:56,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 15:52:56,767 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:52:56,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:56,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1859746338, now seen corresponding path program 6 times [2024-06-20 15:52:56,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:56,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909708902] [2024-06-20 15:52:56,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:56,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:56,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:58,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:58,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909708902] [2024-06-20 15:52:58,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909708902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:58,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:58,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:52:58,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385219527] [2024-06-20 15:52:58,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:58,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:52:58,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:58,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:52:58,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:52:58,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:52:58,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 370 transitions, 3767 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:58,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:58,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:52:58,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:00,332 INFO L124 PetriNetUnfolderBase]: 4257/6456 cut-off events. [2024-06-20 15:53:00,333 INFO L125 PetriNetUnfolderBase]: For 1079501/1079525 co-relation queries the response was YES. [2024-06-20 15:53:00,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65569 conditions, 6456 events. 4257/6456 cut-off events. For 1079501/1079525 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 35070 event pairs, 901 based on Foata normal form. 17/6466 useless extension candidates. Maximal degree in co-relation 65438. Up to 6394 conditions per place. [2024-06-20 15:53:00,407 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 352 selfloop transitions, 30 changer transitions 0/385 dead transitions. [2024-06-20 15:53:00,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 385 transitions, 4693 flow [2024-06-20 15:53:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:53:00,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:53:00,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-20 15:53:00,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35374149659863946 [2024-06-20 15:53:00,408 INFO L175 Difference]: Start difference. First operand has 285 places, 370 transitions, 3767 flow. Second operand 7 states and 104 transitions. [2024-06-20 15:53:00,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 385 transitions, 4693 flow [2024-06-20 15:53:01,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 385 transitions, 4543 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-20 15:53:01,749 INFO L231 Difference]: Finished difference. Result has 287 places, 373 transitions, 3811 flow [2024-06-20 15:53:01,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3617, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3811, PETRI_PLACES=287, PETRI_TRANSITIONS=373} [2024-06-20 15:53:01,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-20 15:53:01,750 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 373 transitions, 3811 flow [2024-06-20 15:53:01,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:01,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:01,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:01,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 15:53:01,751 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:53:01,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:01,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1793164790, now seen corresponding path program 6 times [2024-06-20 15:53:01,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:01,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288782609] [2024-06-20 15:53:01,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:01,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:05,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:05,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288782609] [2024-06-20 15:53:05,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288782609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:05,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:05,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:05,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492691712] [2024-06-20 15:53:05,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:05,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:05,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:05,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:05,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:05,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:53:05,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 373 transitions, 3811 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:53:05,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:05,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:53:05,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:07,354 INFO L124 PetriNetUnfolderBase]: 4349/6611 cut-off events. [2024-06-20 15:53:07,355 INFO L125 PetriNetUnfolderBase]: For 1171777/1171792 co-relation queries the response was YES. [2024-06-20 15:53:07,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67414 conditions, 6611 events. 4349/6611 cut-off events. For 1171777/1171792 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 36230 event pairs, 869 based on Foata normal form. 26/6624 useless extension candidates. Maximal degree in co-relation 67282. Up to 6176 conditions per place. [2024-06-20 15:53:07,444 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 359 selfloop transitions, 54 changer transitions 0/416 dead transitions. [2024-06-20 15:53:07,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 416 transitions, 4887 flow [2024-06-20 15:53:07,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:07,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-20 15:53:07,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-20 15:53:07,446 INFO L175 Difference]: Start difference. First operand has 287 places, 373 transitions, 3811 flow. Second operand 10 states and 167 transitions. [2024-06-20 15:53:07,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 416 transitions, 4887 flow [2024-06-20 15:53:08,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 416 transitions, 4715 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-20 15:53:08,927 INFO L231 Difference]: Finished difference. Result has 292 places, 376 transitions, 3853 flow [2024-06-20 15:53:08,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3639, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3853, PETRI_PLACES=292, PETRI_TRANSITIONS=376} [2024-06-20 15:53:08,928 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-20 15:53:08,928 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 376 transitions, 3853 flow [2024-06-20 15:53:08,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:53:08,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:08,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:08,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 15:53:08,929 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:53:08,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:08,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1620674900, now seen corresponding path program 7 times [2024-06-20 15:53:08,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:08,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727218681] [2024-06-20 15:53:08,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:08,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:12,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:12,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727218681] [2024-06-20 15:53:12,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727218681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:12,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:12,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:12,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303551602] [2024-06-20 15:53:12,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:12,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:12,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:12,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:12,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:12,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:53:12,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 376 transitions, 3853 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:53:12,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:12,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:53:12,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:14,797 INFO L124 PetriNetUnfolderBase]: 4441/6760 cut-off events. [2024-06-20 15:53:14,797 INFO L125 PetriNetUnfolderBase]: For 1212901/1212925 co-relation queries the response was YES. [2024-06-20 15:53:14,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69276 conditions, 6760 events. 4441/6760 cut-off events. For 1212901/1212925 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 37367 event pairs, 926 based on Foata normal form. 36/6789 useless extension candidates. Maximal degree in co-relation 69143. Up to 6451 conditions per place. [2024-06-20 15:53:14,882 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 383 selfloop transitions, 39 changer transitions 0/425 dead transitions. [2024-06-20 15:53:14,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 425 transitions, 4995 flow [2024-06-20 15:53:14,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:14,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:14,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-20 15:53:14,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3874458874458874 [2024-06-20 15:53:14,884 INFO L175 Difference]: Start difference. First operand has 292 places, 376 transitions, 3853 flow. Second operand 11 states and 179 transitions. [2024-06-20 15:53:14,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 425 transitions, 4995 flow [2024-06-20 15:53:16,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 425 transitions, 4833 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:16,254 INFO L231 Difference]: Finished difference. Result has 295 places, 379 transitions, 3899 flow [2024-06-20 15:53:16,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3691, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3899, PETRI_PLACES=295, PETRI_TRANSITIONS=379} [2024-06-20 15:53:16,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-20 15:53:16,255 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 379 transitions, 3899 flow [2024-06-20 15:53:16,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:53:16,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:16,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:16,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 15:53:16,255 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:53:16,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:16,256 INFO L85 PathProgramCache]: Analyzing trace with hash 326407134, now seen corresponding path program 8 times [2024-06-20 15:53:16,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:16,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485679045] [2024-06-20 15:53:16,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:16,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:18,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:18,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:18,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485679045] [2024-06-20 15:53:18,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485679045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:18,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:18,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:53:18,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351718466] [2024-06-20 15:53:18,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:18,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:53:18,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:18,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:53:18,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:53:19,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:53:19,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 379 transitions, 3899 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:19,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:19,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:53:19,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:20,937 INFO L124 PetriNetUnfolderBase]: 4702/7191 cut-off events. [2024-06-20 15:53:20,938 INFO L125 PetriNetUnfolderBase]: For 1306456/1306480 co-relation queries the response was YES. [2024-06-20 15:53:21,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74334 conditions, 7191 events. 4702/7191 cut-off events. For 1306456/1306480 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 40738 event pairs, 929 based on Foata normal form. 32/7216 useless extension candidates. Maximal degree in co-relation 74200. Up to 6100 conditions per place. [2024-06-20 15:53:21,033 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 319 selfloop transitions, 108 changer transitions 0/430 dead transitions. [2024-06-20 15:53:21,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 430 transitions, 5475 flow [2024-06-20 15:53:21,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:21,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:21,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-20 15:53:21,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-20 15:53:21,035 INFO L175 Difference]: Start difference. First operand has 295 places, 379 transitions, 3899 flow. Second operand 10 states and 174 transitions. [2024-06-20 15:53:21,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 430 transitions, 5475 flow [2024-06-20 15:53:22,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 430 transitions, 5315 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-20 15:53:22,773 INFO L231 Difference]: Finished difference. Result has 297 places, 382 transitions, 4173 flow [2024-06-20 15:53:22,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3739, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4173, PETRI_PLACES=297, PETRI_TRANSITIONS=382} [2024-06-20 15:53:22,774 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-20 15:53:22,774 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 382 transitions, 4173 flow [2024-06-20 15:53:22,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:22,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:22,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:22,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 15:53:22,775 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:53:22,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:22,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1932970606, now seen corresponding path program 9 times [2024-06-20 15:53:22,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:22,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491847518] [2024-06-20 15:53:22,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:22,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:25,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:25,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491847518] [2024-06-20 15:53:25,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491847518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:25,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:25,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:53:25,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107507210] [2024-06-20 15:53:25,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:25,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:53:25,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:25,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:53:25,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:53:25,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:53:25,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 382 transitions, 4173 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:25,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:25,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:53:25,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:28,069 INFO L124 PetriNetUnfolderBase]: 4888/7497 cut-off events. [2024-06-20 15:53:28,069 INFO L125 PetriNetUnfolderBase]: For 1415967/1415991 co-relation queries the response was YES. [2024-06-20 15:53:28,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79290 conditions, 7497 events. 4888/7497 cut-off events. For 1415967/1415991 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 43007 event pairs, 1041 based on Foata normal form. 32/7522 useless extension candidates. Maximal degree in co-relation 79154. Up to 6704 conditions per place. [2024-06-20 15:53:28,157 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 382 selfloop transitions, 47 changer transitions 0/432 dead transitions. [2024-06-20 15:53:28,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 432 transitions, 5761 flow [2024-06-20 15:53:28,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:28,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:28,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-20 15:53:28,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-20 15:53:28,159 INFO L175 Difference]: Start difference. First operand has 297 places, 382 transitions, 4173 flow. Second operand 10 states and 169 transitions. [2024-06-20 15:53:28,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 432 transitions, 5761 flow [2024-06-20 15:53:30,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 432 transitions, 5570 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 15:53:30,036 INFO L231 Difference]: Finished difference. Result has 302 places, 385 transitions, 4301 flow [2024-06-20 15:53:30,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3982, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4301, PETRI_PLACES=302, PETRI_TRANSITIONS=385} [2024-06-20 15:53:30,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-20 15:53:30,037 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 385 transitions, 4301 flow [2024-06-20 15:53:30,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:30,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:30,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:30,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 15:53:30,038 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:53:30,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:30,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1988470162, now seen corresponding path program 10 times [2024-06-20 15:53:30,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:30,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564420321] [2024-06-20 15:53:30,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:30,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:32,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:32,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:32,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564420321] [2024-06-20 15:53:32,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564420321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:32,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:32,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:53:32,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002076336] [2024-06-20 15:53:32,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:32,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:53:32,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:32,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:53:32,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:53:33,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:53:33,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 385 transitions, 4301 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:33,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:33,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:53:33,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:35,202 INFO L124 PetriNetUnfolderBase]: 5049/7764 cut-off events. [2024-06-20 15:53:35,202 INFO L125 PetriNetUnfolderBase]: For 1513982/1514006 co-relation queries the response was YES. [2024-06-20 15:53:35,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83437 conditions, 7764 events. 5049/7764 cut-off events. For 1513982/1514006 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 44929 event pairs, 962 based on Foata normal form. 32/7789 useless extension candidates. Maximal degree in co-relation 83298. Up to 4995 conditions per place. [2024-06-20 15:53:35,306 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 309 selfloop transitions, 125 changer transitions 0/437 dead transitions. [2024-06-20 15:53:35,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 437 transitions, 5917 flow [2024-06-20 15:53:35,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:35,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:35,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-20 15:53:35,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-20 15:53:35,308 INFO L175 Difference]: Start difference. First operand has 302 places, 385 transitions, 4301 flow. Second operand 10 states and 172 transitions. [2024-06-20 15:53:35,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 437 transitions, 5917 flow [2024-06-20 15:53:38,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 437 transitions, 5791 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-20 15:53:38,493 INFO L231 Difference]: Finished difference. Result has 307 places, 388 transitions, 4697 flow [2024-06-20 15:53:38,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4175, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4697, PETRI_PLACES=307, PETRI_TRANSITIONS=388} [2024-06-20 15:53:38,493 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-20 15:53:38,493 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 388 transitions, 4697 flow [2024-06-20 15:53:38,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:38,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:38,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:38,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 15:53:38,494 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:53:38,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:38,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1939465726, now seen corresponding path program 11 times [2024-06-20 15:53:38,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:38,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682638000] [2024-06-20 15:53:38,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:38,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:41,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:41,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682638000] [2024-06-20 15:53:41,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682638000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:41,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:41,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:41,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122544172] [2024-06-20 15:53:41,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:41,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:41,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:41,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:41,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:41,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:53:41,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 388 transitions, 4697 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:53:41,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:41,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:53:41,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:44,021 INFO L124 PetriNetUnfolderBase]: 5074/7811 cut-off events. [2024-06-20 15:53:44,021 INFO L125 PetriNetUnfolderBase]: For 1530473/1530497 co-relation queries the response was YES. [2024-06-20 15:53:44,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84142 conditions, 7811 events. 5074/7811 cut-off events. For 1530473/1530497 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 45664 event pairs, 1127 based on Foata normal form. 36/7840 useless extension candidates. Maximal degree in co-relation 84000. Up to 7452 conditions per place. [2024-06-20 15:53:44,123 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 387 selfloop transitions, 47 changer transitions 0/437 dead transitions. [2024-06-20 15:53:44,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 437 transitions, 5877 flow [2024-06-20 15:53:44,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:44,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:44,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-20 15:53:44,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-20 15:53:44,124 INFO L175 Difference]: Start difference. First operand has 307 places, 388 transitions, 4697 flow. Second operand 11 states and 182 transitions. [2024-06-20 15:53:44,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 437 transitions, 5877 flow [2024-06-20 15:53:46,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 437 transitions, 5677 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-20 15:53:46,544 INFO L231 Difference]: Finished difference. Result has 312 places, 391 transitions, 4735 flow [2024-06-20 15:53:46,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4497, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4735, PETRI_PLACES=312, PETRI_TRANSITIONS=391} [2024-06-20 15:53:46,544 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-20 15:53:46,544 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 391 transitions, 4735 flow [2024-06-20 15:53:46,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:53:46,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:46,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:46,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 15:53:46,545 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:53:46,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:46,545 INFO L85 PathProgramCache]: Analyzing trace with hash -222311312, now seen corresponding path program 12 times [2024-06-20 15:53:46,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:46,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258238622] [2024-06-20 15:53:46,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:46,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:50,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:50,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:50,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258238622] [2024-06-20 15:53:50,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258238622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:50,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:50,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:50,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045579689] [2024-06-20 15:53:50,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:50,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:50,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:50,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:50,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:50,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:53:50,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 391 transitions, 4735 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:53:50,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:50,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:53:50,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:52,660 INFO L124 PetriNetUnfolderBase]: 5149/7936 cut-off events. [2024-06-20 15:53:52,660 INFO L125 PetriNetUnfolderBase]: For 1560875/1560899 co-relation queries the response was YES. [2024-06-20 15:53:52,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85378 conditions, 7936 events. 5149/7936 cut-off events. For 1560875/1560899 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 46718 event pairs, 1137 based on Foata normal form. 36/7965 useless extension candidates. Maximal degree in co-relation 85234. Up to 7446 conditions per place. [2024-06-20 15:53:52,774 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 366 selfloop transitions, 69 changer transitions 0/438 dead transitions. [2024-06-20 15:53:52,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 438 transitions, 5880 flow [2024-06-20 15:53:52,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:52,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-20 15:53:52,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917748917748918 [2024-06-20 15:53:52,776 INFO L175 Difference]: Start difference. First operand has 312 places, 391 transitions, 4735 flow. Second operand 11 states and 181 transitions. [2024-06-20 15:53:52,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 438 transitions, 5880 flow [2024-06-20 15:53:55,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 438 transitions, 5728 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-20 15:53:55,908 INFO L231 Difference]: Finished difference. Result has 314 places, 392 transitions, 4821 flow [2024-06-20 15:53:55,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4583, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4821, PETRI_PLACES=314, PETRI_TRANSITIONS=392} [2024-06-20 15:53:55,908 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-20 15:53:55,909 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 392 transitions, 4821 flow [2024-06-20 15:53:55,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:53:55,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:55,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:55,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 15:53:55,909 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:53:55,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:55,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1741891522, now seen corresponding path program 13 times [2024-06-20 15:53:55,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:55,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930770103] [2024-06-20 15:53:55,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:55,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:59,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:59,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930770103] [2024-06-20 15:53:59,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930770103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:59,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:59,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:59,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612362014] [2024-06-20 15:53:59,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:59,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:59,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:59,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:59,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:59,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:53:59,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 392 transitions, 4821 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:53:59,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:59,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:53:59,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:02,356 INFO L124 PetriNetUnfolderBase]: 5174/7983 cut-off events. [2024-06-20 15:54:02,356 INFO L125 PetriNetUnfolderBase]: For 1559898/1559922 co-relation queries the response was YES. [2024-06-20 15:54:02,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85056 conditions, 7983 events. 5174/7983 cut-off events. For 1559898/1559922 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 47105 event pairs, 1094 based on Foata normal form. 36/8012 useless extension candidates. Maximal degree in co-relation 84911. Up to 7086 conditions per place. [2024-06-20 15:54:02,455 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 329 selfloop transitions, 108 changer transitions 0/440 dead transitions. [2024-06-20 15:54:02,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 440 transitions, 5975 flow [2024-06-20 15:54:02,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:02,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-20 15:54:02,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39826839826839827 [2024-06-20 15:54:02,457 INFO L175 Difference]: Start difference. First operand has 314 places, 392 transitions, 4821 flow. Second operand 11 states and 184 transitions. [2024-06-20 15:54:02,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 440 transitions, 5975 flow [2024-06-20 15:54:05,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 440 transitions, 5772 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-20 15:54:05,261 INFO L231 Difference]: Finished difference. Result has 316 places, 394 transitions, 4946 flow [2024-06-20 15:54:05,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4618, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4946, PETRI_PLACES=316, PETRI_TRANSITIONS=394} [2024-06-20 15:54:05,262 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-20 15:54:05,262 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 394 transitions, 4946 flow [2024-06-20 15:54:05,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:54:05,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:05,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:05,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 15:54:05,262 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:54:05,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:05,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1963536562, now seen corresponding path program 14 times [2024-06-20 15:54:05,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:05,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052349377] [2024-06-20 15:54:05,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:05,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:08,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:08,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052349377] [2024-06-20 15:54:08,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052349377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:08,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:08,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:54:08,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685658603] [2024-06-20 15:54:08,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:08,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:54:08,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:08,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:54:08,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:54:08,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:54:08,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 394 transitions, 4946 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:54:08,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:08,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:54:08,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:11,091 INFO L124 PetriNetUnfolderBase]: 5266/8135 cut-off events. [2024-06-20 15:54:11,091 INFO L125 PetriNetUnfolderBase]: For 1592437/1592461 co-relation queries the response was YES. [2024-06-20 15:54:11,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86568 conditions, 8135 events. 5266/8135 cut-off events. For 1592437/1592461 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 48356 event pairs, 1139 based on Foata normal form. 36/8164 useless extension candidates. Maximal degree in co-relation 86422. Up to 7228 conditions per place. [2024-06-20 15:54:11,202 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 339 selfloop transitions, 102 changer transitions 0/444 dead transitions. [2024-06-20 15:54:11,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 444 transitions, 6146 flow [2024-06-20 15:54:11,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:11,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:11,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-20 15:54:11,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-20 15:54:11,204 INFO L175 Difference]: Start difference. First operand has 316 places, 394 transitions, 4946 flow. Second operand 11 states and 188 transitions. [2024-06-20 15:54:11,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 444 transitions, 6146 flow [2024-06-20 15:54:14,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 444 transitions, 5878 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-20 15:54:14,562 INFO L231 Difference]: Finished difference. Result has 318 places, 396 transitions, 5017 flow [2024-06-20 15:54:14,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4678, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5017, PETRI_PLACES=318, PETRI_TRANSITIONS=396} [2024-06-20 15:54:14,563 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-20 15:54:14,563 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 396 transitions, 5017 flow [2024-06-20 15:54:14,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:54:14,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:14,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:14,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 15:54:14,564 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:54:14,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:14,564 INFO L85 PathProgramCache]: Analyzing trace with hash 96718524, now seen corresponding path program 15 times [2024-06-20 15:54:14,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:14,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339412785] [2024-06-20 15:54:14,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:14,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:17,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:17,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:17,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339412785] [2024-06-20 15:54:17,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339412785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:17,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:17,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:17,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722618718] [2024-06-20 15:54:17,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:17,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:17,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:17,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:17,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:17,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:54:17,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 396 transitions, 5017 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:17,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:17,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:54:17,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:19,788 INFO L124 PetriNetUnfolderBase]: 5274/8155 cut-off events. [2024-06-20 15:54:19,789 INFO L125 PetriNetUnfolderBase]: For 1573332/1573356 co-relation queries the response was YES. [2024-06-20 15:54:19,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85852 conditions, 8155 events. 5274/8155 cut-off events. For 1573332/1573356 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 48518 event pairs, 1121 based on Foata normal form. 32/8180 useless extension candidates. Maximal degree in co-relation 85705. Up to 6905 conditions per place. [2024-06-20 15:54:19,903 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 337 selfloop transitions, 105 changer transitions 0/445 dead transitions. [2024-06-20 15:54:19,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 445 transitions, 6554 flow [2024-06-20 15:54:19,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:54:19,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:54:19,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-20 15:54:19,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-20 15:54:19,905 INFO L175 Difference]: Start difference. First operand has 318 places, 396 transitions, 5017 flow. Second operand 10 states and 176 transitions. [2024-06-20 15:54:19,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 445 transitions, 6554 flow [2024-06-20 15:54:23,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 445 transitions, 6287 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-20 15:54:23,489 INFO L231 Difference]: Finished difference. Result has 319 places, 397 transitions, 5061 flow [2024-06-20 15:54:23,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4750, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5061, PETRI_PLACES=319, PETRI_TRANSITIONS=397} [2024-06-20 15:54:23,489 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-20 15:54:23,490 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 397 transitions, 5061 flow [2024-06-20 15:54:23,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:23,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:23,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:23,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 15:54:23,490 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:54:23,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:23,490 INFO L85 PathProgramCache]: Analyzing trace with hash -866821694, now seen corresponding path program 2 times [2024-06-20 15:54:23,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:23,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707493527] [2024-06-20 15:54:23,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:23,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:25,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:25,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707493527] [2024-06-20 15:54:25,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707493527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:25,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:25,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:25,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172867972] [2024-06-20 15:54:25,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:25,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:25,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:25,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:25,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:25,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:54:25,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 397 transitions, 5061 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:25,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:25,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:54:25,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:28,088 INFO L124 PetriNetUnfolderBase]: 5284/8170 cut-off events. [2024-06-20 15:54:28,089 INFO L125 PetriNetUnfolderBase]: For 1538090/1538090 co-relation queries the response was YES. [2024-06-20 15:54:28,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85756 conditions, 8170 events. 5284/8170 cut-off events. For 1538090/1538090 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 48600 event pairs, 1228 based on Foata normal form. 2/8169 useless extension candidates. Maximal degree in co-relation 85608. Up to 8130 conditions per place. [2024-06-20 15:54:28,193 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 390 selfloop transitions, 19 changer transitions 0/412 dead transitions. [2024-06-20 15:54:28,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 412 transitions, 6009 flow [2024-06-20 15:54:28,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:54:28,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:54:28,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-06-20 15:54:28,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3392857142857143 [2024-06-20 15:54:28,194 INFO L175 Difference]: Start difference. First operand has 319 places, 397 transitions, 5061 flow. Second operand 8 states and 114 transitions. [2024-06-20 15:54:28,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 412 transitions, 6009 flow [2024-06-20 15:54:32,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 412 transitions, 5513 flow, removed 42 selfloop flow, removed 12 redundant places. [2024-06-20 15:54:32,209 INFO L231 Difference]: Finished difference. Result has 315 places, 400 transitions, 4710 flow [2024-06-20 15:54:32,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4565, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4710, PETRI_PLACES=315, PETRI_TRANSITIONS=400} [2024-06-20 15:54:32,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-20 15:54:32,209 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 400 transitions, 4710 flow [2024-06-20 15:54:32,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:32,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:32,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:32,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 15:54:32,210 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:54:32,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:32,210 INFO L85 PathProgramCache]: Analyzing trace with hash -867297358, now seen corresponding path program 4 times [2024-06-20 15:54:32,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:32,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397090835] [2024-06-20 15:54:32,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:32,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:34,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:34,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:34,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397090835] [2024-06-20 15:54:34,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397090835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:34,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:34,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:34,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944268548] [2024-06-20 15:54:34,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:34,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:34,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:34,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:34,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:34,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:54:34,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 400 transitions, 4710 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:34,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:34,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:54:34,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:36,964 INFO L124 PetriNetUnfolderBase]: 5294/8186 cut-off events. [2024-06-20 15:54:36,964 INFO L125 PetriNetUnfolderBase]: For 1541089/1541104 co-relation queries the response was YES. [2024-06-20 15:54:37,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84272 conditions, 8186 events. 5294/8186 cut-off events. For 1541089/1541104 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 48694 event pairs, 1235 based on Foata normal form. 8/8181 useless extension candidates. Maximal degree in co-relation 84127. Up to 7991 conditions per place. [2024-06-20 15:54:37,075 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 358 selfloop transitions, 60 changer transitions 0/421 dead transitions. [2024-06-20 15:54:37,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 421 transitions, 5948 flow [2024-06-20 15:54:37,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:54:37,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:54:37,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-20 15:54:37,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-20 15:54:37,076 INFO L175 Difference]: Start difference. First operand has 315 places, 400 transitions, 4710 flow. Second operand 8 states and 123 transitions. [2024-06-20 15:54:37,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 421 transitions, 5948 flow [2024-06-20 15:54:40,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 421 transitions, 5797 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-20 15:54:40,522 INFO L231 Difference]: Finished difference. Result has 316 places, 406 transitions, 4847 flow [2024-06-20 15:54:40,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4559, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4847, PETRI_PLACES=316, PETRI_TRANSITIONS=406} [2024-06-20 15:54:40,529 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-20 15:54:40,529 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 406 transitions, 4847 flow [2024-06-20 15:54:40,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:40,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:40,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:40,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 15:54:40,530 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:54:40,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:40,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1851641760, now seen corresponding path program 3 times [2024-06-20 15:54:40,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:40,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772149375] [2024-06-20 15:54:40,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:40,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:42,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:42,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772149375] [2024-06-20 15:54:42,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772149375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:42,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:42,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:42,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516872277] [2024-06-20 15:54:42,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:42,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:42,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:42,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:42,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:43,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:54:43,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 406 transitions, 4847 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:43,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:43,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:54:43,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:45,201 INFO L124 PetriNetUnfolderBase]: 5299/8190 cut-off events. [2024-06-20 15:54:45,201 INFO L125 PetriNetUnfolderBase]: For 1566281/1566302 co-relation queries the response was YES. [2024-06-20 15:54:45,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85123 conditions, 8190 events. 5299/8190 cut-off events. For 1566281/1566302 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 48722 event pairs, 1221 based on Foata normal form. 15/8198 useless extension candidates. Maximal degree in co-relation 84978. Up to 8112 conditions per place. [2024-06-20 15:54:45,304 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 384 selfloop transitions, 42 changer transitions 0/429 dead transitions. [2024-06-20 15:54:45,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 429 transitions, 6157 flow [2024-06-20 15:54:45,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:54:45,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:54:45,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-20 15:54:45,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-06-20 15:54:45,305 INFO L175 Difference]: Start difference. First operand has 316 places, 406 transitions, 4847 flow. Second operand 8 states and 118 transitions. [2024-06-20 15:54:45,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 429 transitions, 6157 flow [2024-06-20 15:54:48,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 429 transitions, 6033 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-20 15:54:48,835 INFO L231 Difference]: Finished difference. Result has 321 places, 415 transitions, 5041 flow [2024-06-20 15:54:48,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4723, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5041, PETRI_PLACES=321, PETRI_TRANSITIONS=415} [2024-06-20 15:54:48,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-20 15:54:48,835 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 415 transitions, 5041 flow [2024-06-20 15:54:48,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:48,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:48,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:48,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 15:54:48,836 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:54:48,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:48,836 INFO L85 PathProgramCache]: Analyzing trace with hash -881106928, now seen corresponding path program 5 times [2024-06-20 15:54:48,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:48,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145629133] [2024-06-20 15:54:48,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:48,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:51,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:51,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:51,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145629133] [2024-06-20 15:54:51,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145629133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:51,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:51,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:51,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584524550] [2024-06-20 15:54:51,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:51,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:51,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:51,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:51,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:51,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:54:51,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 415 transitions, 5041 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:51,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:51,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:54:51,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:53,658 INFO L124 PetriNetUnfolderBase]: 5309/8207 cut-off events. [2024-06-20 15:54:53,659 INFO L125 PetriNetUnfolderBase]: For 1601193/1601205 co-relation queries the response was YES. [2024-06-20 15:54:53,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85848 conditions, 8207 events. 5309/8207 cut-off events. For 1601193/1601205 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 48820 event pairs, 1234 based on Foata normal form. 7/8201 useless extension candidates. Maximal degree in co-relation 85700. Up to 8045 conditions per place. [2024-06-20 15:54:53,757 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 386 selfloop transitions, 45 changer transitions 0/434 dead transitions. [2024-06-20 15:54:53,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 434 transitions, 6237 flow [2024-06-20 15:54:53,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:54:53,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:54:53,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-20 15:54:53,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-20 15:54:53,759 INFO L175 Difference]: Start difference. First operand has 321 places, 415 transitions, 5041 flow. Second operand 8 states and 124 transitions. [2024-06-20 15:54:53,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 434 transitions, 6237 flow [2024-06-20 15:54:57,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 434 transitions, 6109 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-20 15:54:57,088 INFO L231 Difference]: Finished difference. Result has 326 places, 418 transitions, 5089 flow [2024-06-20 15:54:57,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4913, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5089, PETRI_PLACES=326, PETRI_TRANSITIONS=418} [2024-06-20 15:54:57,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-20 15:54:57,089 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 418 transitions, 5089 flow [2024-06-20 15:54:57,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:57,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:57,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:57,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 15:54:57,089 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:54:57,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:57,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1865451330, now seen corresponding path program 4 times [2024-06-20 15:54:57,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:57,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233885595] [2024-06-20 15:54:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:57,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:59,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:59,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233885595] [2024-06-20 15:54:59,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233885595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:59,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:59,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:59,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364144498] [2024-06-20 15:54:59,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:59,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:59,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:59,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:59,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:59,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:54:59,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 418 transitions, 5089 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:59,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:59,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:54:59,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:01,619 INFO L124 PetriNetUnfolderBase]: 5311/8207 cut-off events. [2024-06-20 15:55:01,620 INFO L125 PetriNetUnfolderBase]: For 1622174/1622195 co-relation queries the response was YES. [2024-06-20 15:55:01,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86115 conditions, 8207 events. 5311/8207 cut-off events. For 1622174/1622195 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 48806 event pairs, 1223 based on Foata normal form. 16/8216 useless extension candidates. Maximal degree in co-relation 85965. Up to 8148 conditions per place. [2024-06-20 15:55:01,739 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 404 selfloop transitions, 27 changer transitions 0/434 dead transitions. [2024-06-20 15:55:01,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 434 transitions, 6099 flow [2024-06-20 15:55:01,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:55:01,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:55:01,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-20 15:55:01,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34226190476190477 [2024-06-20 15:55:01,740 INFO L175 Difference]: Start difference. First operand has 326 places, 418 transitions, 5089 flow. Second operand 8 states and 115 transitions. [2024-06-20 15:55:01,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 434 transitions, 6099 flow [2024-06-20 15:55:04,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 434 transitions, 5859 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-20 15:55:04,826 INFO L231 Difference]: Finished difference. Result has 328 places, 421 transitions, 5023 flow [2024-06-20 15:55:04,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4849, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5023, PETRI_PLACES=328, PETRI_TRANSITIONS=421} [2024-06-20 15:55:04,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-20 15:55:04,827 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 421 transitions, 5023 flow [2024-06-20 15:55:04,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:04,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:04,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:04,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 15:55:04,827 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:55:04,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:04,828 INFO L85 PathProgramCache]: Analyzing trace with hash -881119018, now seen corresponding path program 6 times [2024-06-20 15:55:04,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:04,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766652394] [2024-06-20 15:55:04,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:04,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:07,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:07,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766652394] [2024-06-20 15:55:07,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766652394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:07,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:07,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:55:07,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663223567] [2024-06-20 15:55:07,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:07,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:55:07,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:07,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:55:07,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:55:07,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:55:07,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 421 transitions, 5023 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:07,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:07,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:55:07,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:09,395 INFO L124 PetriNetUnfolderBase]: 5305/8202 cut-off events. [2024-06-20 15:55:09,395 INFO L125 PetriNetUnfolderBase]: For 1635821/1635833 co-relation queries the response was YES. [2024-06-20 15:55:09,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86156 conditions, 8202 events. 5305/8202 cut-off events. For 1635821/1635833 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 48787 event pairs, 1234 based on Foata normal form. 7/8196 useless extension candidates. Maximal degree in co-relation 86005. Up to 8052 conditions per place. [2024-06-20 15:55:09,525 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 392 selfloop transitions, 40 changer transitions 0/435 dead transitions. [2024-06-20 15:55:09,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 435 transitions, 5929 flow [2024-06-20 15:55:09,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:55:09,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:55:09,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-20 15:55:09,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-20 15:55:09,527 INFO L175 Difference]: Start difference. First operand has 328 places, 421 transitions, 5023 flow. Second operand 8 states and 120 transitions. [2024-06-20 15:55:09,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 435 transitions, 5929 flow [2024-06-20 15:55:13,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 435 transitions, 5713 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-06-20 15:55:13,473 INFO L231 Difference]: Finished difference. Result has 330 places, 421 transitions, 4893 flow [2024-06-20 15:55:13,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4807, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4893, PETRI_PLACES=330, PETRI_TRANSITIONS=421} [2024-06-20 15:55:13,474 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-20 15:55:13,474 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 421 transitions, 4893 flow [2024-06-20 15:55:13,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:13,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:13,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:13,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 15:55:13,475 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:55:13,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:13,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1303522786, now seen corresponding path program 1 times [2024-06-20 15:55:13,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:13,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800254007] [2024-06-20 15:55:13,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:13,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:16,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:16,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800254007] [2024-06-20 15:55:16,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800254007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:16,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:16,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:55:16,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386011373] [2024-06-20 15:55:16,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:16,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:55:16,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:16,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:55:16,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:55:16,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 15:55:16,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 421 transitions, 4893 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:16,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:16,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 15:55:16,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:18,631 INFO L124 PetriNetUnfolderBase]: 5134/8028 cut-off events. [2024-06-20 15:55:18,632 INFO L125 PetriNetUnfolderBase]: For 1648602/1648602 co-relation queries the response was YES. [2024-06-20 15:55:18,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84880 conditions, 8028 events. 5134/8028 cut-off events. For 1648602/1648602 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 48500 event pairs, 1186 based on Foata normal form. 1/8026 useless extension candidates. Maximal degree in co-relation 84728. Up to 7835 conditions per place. [2024-06-20 15:55:18,755 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 413 selfloop transitions, 17 changer transitions 0/444 dead transitions. [2024-06-20 15:55:18,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 444 transitions, 5917 flow [2024-06-20 15:55:18,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:55:18,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:55:18,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 15:55:18,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 15:55:18,757 INFO L175 Difference]: Start difference. First operand has 330 places, 421 transitions, 4893 flow. Second operand 8 states and 128 transitions. [2024-06-20 15:55:18,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 444 transitions, 5917 flow [2024-06-20 15:55:22,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 444 transitions, 5829 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:55:22,747 INFO L231 Difference]: Finished difference. Result has 331 places, 424 transitions, 4955 flow [2024-06-20 15:55:22,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4805, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4955, PETRI_PLACES=331, PETRI_TRANSITIONS=424} [2024-06-20 15:55:22,747 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-20 15:55:22,747 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 424 transitions, 4955 flow [2024-06-20 15:55:22,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:22,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:22,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:22,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 15:55:22,748 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:55:22,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:22,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1303642942, now seen corresponding path program 1 times [2024-06-20 15:55:22,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:22,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353619587] [2024-06-20 15:55:22,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:22,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:25,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:25,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353619587] [2024-06-20 15:55:25,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353619587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:25,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:25,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:55:25,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500208126] [2024-06-20 15:55:25,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:25,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:55:25,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:25,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:55:25,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:55:25,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 15:55:25,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 424 transitions, 4955 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:25,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:25,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 15:55:25,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:27,615 INFO L124 PetriNetUnfolderBase]: 5164/8076 cut-off events. [2024-06-20 15:55:27,615 INFO L125 PetriNetUnfolderBase]: For 1722581/1722581 co-relation queries the response was YES. [2024-06-20 15:55:27,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85849 conditions, 8076 events. 5164/8076 cut-off events. For 1722581/1722581 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 48902 event pairs, 1185 based on Foata normal form. 9/8082 useless extension candidates. Maximal degree in co-relation 85696. Up to 7858 conditions per place. [2024-06-20 15:55:27,738 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 417 selfloop transitions, 18 changer transitions 0/449 dead transitions. [2024-06-20 15:55:27,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 449 transitions, 6051 flow [2024-06-20 15:55:27,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:55:27,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:55:27,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 15:55:27,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 15:55:27,740 INFO L175 Difference]: Start difference. First operand has 331 places, 424 transitions, 4955 flow. Second operand 8 states and 130 transitions. [2024-06-20 15:55:27,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 449 transitions, 6051 flow [2024-06-20 15:55:32,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 449 transitions, 5923 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-20 15:55:32,038 INFO L231 Difference]: Finished difference. Result has 333 places, 428 transitions, 4952 flow [2024-06-20 15:55:32,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4827, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4952, PETRI_PLACES=333, PETRI_TRANSITIONS=428} [2024-06-20 15:55:32,038 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-20 15:55:32,039 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 428 transitions, 4952 flow [2024-06-20 15:55:32,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:32,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:32,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:32,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 15:55:32,039 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:55:32,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:32,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1308284572, now seen corresponding path program 2 times [2024-06-20 15:55:32,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:32,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324080940] [2024-06-20 15:55:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:32,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:34,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:34,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324080940] [2024-06-20 15:55:34,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324080940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:34,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:34,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:55:34,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107786462] [2024-06-20 15:55:34,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:34,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:55:34,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:34,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:55:34,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:55:34,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 15:55:34,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 428 transitions, 4952 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:34,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:34,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 15:55:34,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:36,956 INFO L124 PetriNetUnfolderBase]: 5192/8118 cut-off events. [2024-06-20 15:55:36,957 INFO L125 PetriNetUnfolderBase]: For 1756395/1756396 co-relation queries the response was YES. [2024-06-20 15:55:37,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87239 conditions, 8118 events. 5192/8118 cut-off events. For 1756395/1756396 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 49186 event pairs, 1191 based on Foata normal form. 9/8122 useless extension candidates. Maximal degree in co-relation 87085. Up to 7904 conditions per place. [2024-06-20 15:55:37,086 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 418 selfloop transitions, 18 changer transitions 0/450 dead transitions. [2024-06-20 15:55:37,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 450 transitions, 6050 flow [2024-06-20 15:55:37,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:55:37,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:55:37,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 15:55:37,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-20 15:55:37,088 INFO L175 Difference]: Start difference. First operand has 333 places, 428 transitions, 4952 flow. Second operand 8 states and 127 transitions. [2024-06-20 15:55:37,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 450 transitions, 6050 flow [2024-06-20 15:55:41,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 450 transitions, 5955 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-20 15:55:41,259 INFO L231 Difference]: Finished difference. Result has 335 places, 432 transitions, 4990 flow [2024-06-20 15:55:41,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4857, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4990, PETRI_PLACES=335, PETRI_TRANSITIONS=432} [2024-06-20 15:55:41,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-20 15:55:41,260 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 432 transitions, 4990 flow [2024-06-20 15:55:41,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:41,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:41,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:41,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 15:55:41,261 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:55:41,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:41,261 INFO L85 PathProgramCache]: Analyzing trace with hash 757252970, now seen corresponding path program 3 times [2024-06-20 15:55:41,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:41,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431227984] [2024-06-20 15:55:41,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:41,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:44,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:44,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431227984] [2024-06-20 15:55:44,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431227984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:44,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:44,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:55:44,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936881559] [2024-06-20 15:55:44,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:44,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:55:44,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:44,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:55:44,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:55:44,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 15:55:44,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 432 transitions, 4990 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:44,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:44,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 15:55:44,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:46,408 INFO L124 PetriNetUnfolderBase]: 5202/8130 cut-off events. [2024-06-20 15:55:46,408 INFO L125 PetriNetUnfolderBase]: For 1749219/1749226 co-relation queries the response was YES. [2024-06-20 15:55:46,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88130 conditions, 8130 events. 5202/8130 cut-off events. For 1749219/1749226 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 49280 event pairs, 1195 based on Foata normal form. 4/8130 useless extension candidates. Maximal degree in co-relation 87975. Up to 7935 conditions per place. [2024-06-20 15:55:46,527 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 420 selfloop transitions, 17 changer transitions 0/451 dead transitions. [2024-06-20 15:55:46,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 451 transitions, 5992 flow [2024-06-20 15:55:46,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:55:46,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:55:46,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-20 15:55:46,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-20 15:55:46,529 INFO L175 Difference]: Start difference. First operand has 335 places, 432 transitions, 4990 flow. Second operand 8 states and 124 transitions. [2024-06-20 15:55:46,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 451 transitions, 5992 flow [2024-06-20 15:55:50,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 451 transitions, 5889 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-20 15:55:50,956 INFO L231 Difference]: Finished difference. Result has 337 places, 435 transitions, 5005 flow [2024-06-20 15:55:50,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4887, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5005, PETRI_PLACES=337, PETRI_TRANSITIONS=435} [2024-06-20 15:55:50,956 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-20 15:55:50,956 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 435 transitions, 5005 flow [2024-06-20 15:55:50,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:50,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:50,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:50,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 15:55:50,957 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:55:50,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:50,957 INFO L85 PathProgramCache]: Analyzing trace with hash -867112660, now seen corresponding path program 4 times [2024-06-20 15:55:50,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:50,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565939445] [2024-06-20 15:55:50,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:50,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:53,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:53,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565939445] [2024-06-20 15:55:53,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565939445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:53,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:53,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:55:53,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272848067] [2024-06-20 15:55:53,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:53,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:55:53,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:53,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:55:53,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:55:54,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 15:55:54,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 435 transitions, 5005 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:54,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:54,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 15:55:54,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:56,243 INFO L124 PetriNetUnfolderBase]: 5214/8148 cut-off events. [2024-06-20 15:55:56,243 INFO L125 PetriNetUnfolderBase]: For 1773642/1773650 co-relation queries the response was YES. [2024-06-20 15:55:56,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88730 conditions, 8148 events. 5214/8148 cut-off events. For 1773642/1773650 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 49445 event pairs, 1195 based on Foata normal form. 3/8146 useless extension candidates. Maximal degree in co-relation 88574. Up to 7955 conditions per place. [2024-06-20 15:55:56,356 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 418 selfloop transitions, 19 changer transitions 0/451 dead transitions. [2024-06-20 15:55:56,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 451 transitions, 6003 flow [2024-06-20 15:55:56,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:55:56,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:55:56,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-20 15:55:56,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-20 15:55:56,357 INFO L175 Difference]: Start difference. First operand has 337 places, 435 transitions, 5005 flow. Second operand 8 states and 121 transitions. [2024-06-20 15:55:56,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 451 transitions, 6003 flow [2024-06-20 15:56:00,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 451 transitions, 5907 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-20 15:56:00,938 INFO L231 Difference]: Finished difference. Result has 339 places, 438 transitions, 5037 flow [2024-06-20 15:56:00,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4909, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5037, PETRI_PLACES=339, PETRI_TRANSITIONS=438} [2024-06-20 15:56:00,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-20 15:56:00,938 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 438 transitions, 5037 flow [2024-06-20 15:56:00,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:56:00,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:00,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:00,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 15:56:00,939 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:56:00,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:00,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1859738216, now seen corresponding path program 5 times [2024-06-20 15:56:00,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:00,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318914172] [2024-06-20 15:56:00,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:00,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:03,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:03,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318914172] [2024-06-20 15:56:03,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318914172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:03,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:03,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:56:03,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634991648] [2024-06-20 15:56:03,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:03,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:56:03,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:03,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:56:03,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:56:03,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 15:56:03,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 438 transitions, 5037 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:56:03,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:03,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 15:56:03,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:06,284 INFO L124 PetriNetUnfolderBase]: 5240/8186 cut-off events. [2024-06-20 15:56:06,284 INFO L125 PetriNetUnfolderBase]: For 1823865/1823873 co-relation queries the response was YES. [2024-06-20 15:56:06,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89752 conditions, 8186 events. 5240/8186 cut-off events. For 1823865/1823873 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 49619 event pairs, 1199 based on Foata normal form. 7/8187 useless extension candidates. Maximal degree in co-relation 89595. Up to 7989 conditions per place. [2024-06-20 15:56:06,409 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 426 selfloop transitions, 18 changer transitions 0/458 dead transitions. [2024-06-20 15:56:06,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 458 transitions, 6157 flow [2024-06-20 15:56:06,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:56:06,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:56:06,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-20 15:56:06,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3630952380952381 [2024-06-20 15:56:06,411 INFO L175 Difference]: Start difference. First operand has 339 places, 438 transitions, 5037 flow. Second operand 8 states and 122 transitions. [2024-06-20 15:56:06,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 458 transitions, 6157 flow [2024-06-20 15:56:10,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 458 transitions, 6051 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-20 15:56:10,568 INFO L231 Difference]: Finished difference. Result has 342 places, 445 transitions, 5162 flow [2024-06-20 15:56:10,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4931, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5162, PETRI_PLACES=342, PETRI_TRANSITIONS=445} [2024-06-20 15:56:10,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-20 15:56:10,569 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 445 transitions, 5162 flow [2024-06-20 15:56:10,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:56:10,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:10,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:10,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 15:56:10,569 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:56:10,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:10,570 INFO L85 PathProgramCache]: Analyzing trace with hash -875386870, now seen corresponding path program 6 times [2024-06-20 15:56:10,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:10,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959578900] [2024-06-20 15:56:10,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:10,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:13,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:13,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:13,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959578900] [2024-06-20 15:56:13,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959578900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:13,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:13,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:56:13,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209963729] [2024-06-20 15:56:13,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:13,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:56:13,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:13,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:56:13,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:56:13,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 15:56:13,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 445 transitions, 5162 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:56:13,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:13,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 15:56:13,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:15,840 INFO L124 PetriNetUnfolderBase]: 5228/8170 cut-off events. [2024-06-20 15:56:15,840 INFO L125 PetriNetUnfolderBase]: For 1815848/1815856 co-relation queries the response was YES. [2024-06-20 15:56:15,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90088 conditions, 8170 events. 5228/8170 cut-off events. For 1815848/1815856 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 49567 event pairs, 1195 based on Foata normal form. 2/8167 useless extension candidates. Maximal degree in co-relation 89929. Up to 7986 conditions per place. [2024-06-20 15:56:15,955 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 431 selfloop transitions, 17 changer transitions 0/462 dead transitions. [2024-06-20 15:56:15,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 462 transitions, 6178 flow [2024-06-20 15:56:15,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:56:15,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:56:15,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-20 15:56:15,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-20 15:56:15,956 INFO L175 Difference]: Start difference. First operand has 342 places, 445 transitions, 5162 flow. Second operand 8 states and 119 transitions. [2024-06-20 15:56:15,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 462 transitions, 6178 flow [2024-06-20 15:56:20,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 462 transitions, 6010 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-20 15:56:20,559 INFO L231 Difference]: Finished difference. Result has 347 places, 451 transitions, 5138 flow [2024-06-20 15:56:20,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4994, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5138, PETRI_PLACES=347, PETRI_TRANSITIONS=451} [2024-06-20 15:56:20,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-20 15:56:20,560 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 451 transitions, 5138 flow [2024-06-20 15:56:20,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:56:20,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:20,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:20,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 15:56:20,560 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:56:20,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:20,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1851149666, now seen corresponding path program 1 times [2024-06-20 15:56:20,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:20,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973813303] [2024-06-20 15:56:20,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:20,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:24,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:24,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973813303] [2024-06-20 15:56:24,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973813303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:24,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:24,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:56:24,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411102403] [2024-06-20 15:56:24,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:24,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:56:24,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:24,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:56:24,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:56:24,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:56:24,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 451 transitions, 5138 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:56:24,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:24,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:56:24,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:26,909 INFO L124 PetriNetUnfolderBase]: 5441/8391 cut-off events. [2024-06-20 15:56:26,909 INFO L125 PetriNetUnfolderBase]: For 1838952/1838952 co-relation queries the response was YES. [2024-06-20 15:56:26,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91929 conditions, 8391 events. 5441/8391 cut-off events. For 1838952/1838952 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 49841 event pairs, 1247 based on Foata normal form. 2/8390 useless extension candidates. Maximal degree in co-relation 91767. Up to 8353 conditions per place. [2024-06-20 15:56:27,033 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 444 selfloop transitions, 19 changer transitions 0/466 dead transitions. [2024-06-20 15:56:27,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 466 transitions, 6186 flow [2024-06-20 15:56:27,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:56:27,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:56:27,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-06-20 15:56:27,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3253968253968254 [2024-06-20 15:56:27,034 INFO L175 Difference]: Start difference. First operand has 347 places, 451 transitions, 5138 flow. Second operand 9 states and 123 transitions. [2024-06-20 15:56:27,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 466 transitions, 6186 flow [2024-06-20 15:56:31,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 466 transitions, 6098 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-20 15:56:31,468 INFO L231 Difference]: Finished difference. Result has 352 places, 453 transitions, 5185 flow [2024-06-20 15:56:31,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5050, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5185, PETRI_PLACES=352, PETRI_TRANSITIONS=453} [2024-06-20 15:56:31,469 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-20 15:56:31,469 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 453 transitions, 5185 flow [2024-06-20 15:56:31,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:56:31,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:31,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:31,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 15:56:31,469 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:56:31,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:31,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1137847496, now seen corresponding path program 1 times [2024-06-20 15:56:31,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:31,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837943519] [2024-06-20 15:56:31,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:31,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:35,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:35,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837943519] [2024-06-20 15:56:35,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837943519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:35,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:35,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:56:35,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430409061] [2024-06-20 15:56:35,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:35,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:56:35,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:35,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:56:35,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:56:35,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:56:35,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 453 transitions, 5185 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:56:35,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:35,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:56:35,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:38,107 INFO L124 PetriNetUnfolderBase]: 5482/8460 cut-off events. [2024-06-20 15:56:38,107 INFO L125 PetriNetUnfolderBase]: For 1917615/1917621 co-relation queries the response was YES. [2024-06-20 15:56:38,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93007 conditions, 8460 events. 5482/8460 cut-off events. For 1917615/1917621 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 50194 event pairs, 1011 based on Foata normal form. 18/8475 useless extension candidates. Maximal degree in co-relation 92843. Up to 8185 conditions per place. [2024-06-20 15:56:38,233 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 469 selfloop transitions, 32 changer transitions 0/504 dead transitions. [2024-06-20 15:56:38,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 504 transitions, 6463 flow [2024-06-20 15:56:38,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:56:38,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:56:38,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-20 15:56:38,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-06-20 15:56:38,235 INFO L175 Difference]: Start difference. First operand has 352 places, 453 transitions, 5185 flow. Second operand 11 states and 175 transitions. [2024-06-20 15:56:38,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 504 transitions, 6463 flow [2024-06-20 15:56:42,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 504 transitions, 6336 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-20 15:56:42,675 INFO L231 Difference]: Finished difference. Result has 357 places, 456 transitions, 5251 flow [2024-06-20 15:56:42,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5058, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5251, PETRI_PLACES=357, PETRI_TRANSITIONS=456} [2024-06-20 15:56:42,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-20 15:56:42,676 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 456 transitions, 5251 flow [2024-06-20 15:56:42,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:56:42,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:42,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:42,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 15:56:42,676 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:56:42,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:42,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1636706978, now seen corresponding path program 2 times [2024-06-20 15:56:42,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:42,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324075817] [2024-06-20 15:56:42,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:42,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:46,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:46,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324075817] [2024-06-20 15:56:46,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324075817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:46,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:46,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:56:46,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723371522] [2024-06-20 15:56:46,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:46,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:56:46,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:46,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:56:46,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:56:46,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:56:46,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 456 transitions, 5251 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:56:46,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:46,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:56:46,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:49,824 INFO L124 PetriNetUnfolderBase]: 5601/8661 cut-off events. [2024-06-20 15:56:49,825 INFO L125 PetriNetUnfolderBase]: For 2021054/2021060 co-relation queries the response was YES. [2024-06-20 15:56:49,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96574 conditions, 8661 events. 5601/8661 cut-off events. For 2021054/2021060 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 52034 event pairs, 1196 based on Foata normal form. 18/8676 useless extension candidates. Maximal degree in co-relation 96408. Up to 7980 conditions per place. [2024-06-20 15:56:49,962 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 454 selfloop transitions, 53 changer transitions 0/510 dead transitions. [2024-06-20 15:56:49,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 510 transitions, 7065 flow [2024-06-20 15:56:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:56:49,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:56:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-20 15:56:49,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-20 15:56:49,963 INFO L175 Difference]: Start difference. First operand has 357 places, 456 transitions, 5251 flow. Second operand 10 states and 173 transitions. [2024-06-20 15:56:49,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 510 transitions, 7065 flow [2024-06-20 15:56:55,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 510 transitions, 6901 flow, removed 52 selfloop flow, removed 8 redundant places. [2024-06-20 15:56:55,018 INFO L231 Difference]: Finished difference. Result has 360 places, 460 transitions, 5427 flow [2024-06-20 15:56:55,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5087, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5427, PETRI_PLACES=360, PETRI_TRANSITIONS=460} [2024-06-20 15:56:55,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-20 15:56:55,018 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 460 transitions, 5427 flow [2024-06-20 15:56:55,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:56:55,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:55,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:55,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 15:56:55,019 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:56:55,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:55,019 INFO L85 PathProgramCache]: Analyzing trace with hash 92490086, now seen corresponding path program 3 times [2024-06-20 15:56:55,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:55,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539946650] [2024-06-20 15:56:55,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:55,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:55,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:58,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:58,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:58,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539946650] [2024-06-20 15:56:58,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539946650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:58,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:58,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:56:58,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649512752] [2024-06-20 15:56:58,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:58,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:56:58,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:58,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:56:58,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:56:58,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:56:58,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 460 transitions, 5427 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:56:58,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:58,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:56:58,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:01,871 INFO L124 PetriNetUnfolderBase]: 5634/8720 cut-off events. [2024-06-20 15:57:01,871 INFO L125 PetriNetUnfolderBase]: For 2076890/2076896 co-relation queries the response was YES. [2024-06-20 15:57:01,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96819 conditions, 8720 events. 5634/8720 cut-off events. For 2076890/2076896 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 52552 event pairs, 1229 based on Foata normal form. 22/8739 useless extension candidates. Maximal degree in co-relation 96651. Up to 8246 conditions per place. [2024-06-20 15:57:02,013 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 456 selfloop transitions, 52 changer transitions 0/511 dead transitions. [2024-06-20 15:57:02,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 511 transitions, 6736 flow [2024-06-20 15:57:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:57:02,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:57:02,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-20 15:57:02,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917748917748918 [2024-06-20 15:57:02,015 INFO L175 Difference]: Start difference. First operand has 360 places, 460 transitions, 5427 flow. Second operand 11 states and 181 transitions. [2024-06-20 15:57:02,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 511 transitions, 6736 flow [2024-06-20 15:57:07,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 511 transitions, 6576 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-20 15:57:07,422 INFO L231 Difference]: Finished difference. Result has 365 places, 461 transitions, 5474 flow [2024-06-20 15:57:07,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5273, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5474, PETRI_PLACES=365, PETRI_TRANSITIONS=461} [2024-06-20 15:57:07,423 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-20 15:57:07,423 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 461 transitions, 5474 flow [2024-06-20 15:57:07,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:07,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:07,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:07,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 15:57:07,424 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:57:07,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:07,424 INFO L85 PathProgramCache]: Analyzing trace with hash -117915788, now seen corresponding path program 4 times [2024-06-20 15:57:07,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:07,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107614176] [2024-06-20 15:57:07,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:07,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:10,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:10,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:10,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107614176] [2024-06-20 15:57:10,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107614176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:10,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:10,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:57:10,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801956494] [2024-06-20 15:57:10,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:10,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:57:10,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:10,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:57:10,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:57:11,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:57:11,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 461 transitions, 5474 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:11,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:11,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:57:11,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:14,230 INFO L124 PetriNetUnfolderBase]: 5675/8791 cut-off events. [2024-06-20 15:57:14,230 INFO L125 PetriNetUnfolderBase]: For 2084071/2084077 co-relation queries the response was YES. [2024-06-20 15:57:14,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97517 conditions, 8791 events. 5675/8791 cut-off events. For 2084071/2084077 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 53173 event pairs, 1223 based on Foata normal form. 18/8806 useless extension candidates. Maximal degree in co-relation 97347. Up to 8492 conditions per place. [2024-06-20 15:57:14,360 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 470 selfloop transitions, 39 changer transitions 0/512 dead transitions. [2024-06-20 15:57:14,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 512 transitions, 6778 flow [2024-06-20 15:57:14,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:57:14,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:57:14,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-20 15:57:14,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 15:57:14,362 INFO L175 Difference]: Start difference. First operand has 365 places, 461 transitions, 5474 flow. Second operand 11 states and 176 transitions. [2024-06-20 15:57:14,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 512 transitions, 6778 flow [2024-06-20 15:57:20,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 512 transitions, 6618 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-20 15:57:20,581 INFO L231 Difference]: Finished difference. Result has 368 places, 464 transitions, 5529 flow [2024-06-20 15:57:20,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5314, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5529, PETRI_PLACES=368, PETRI_TRANSITIONS=464} [2024-06-20 15:57:20,581 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-20 15:57:20,581 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 464 transitions, 5529 flow [2024-06-20 15:57:20,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:20,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:20,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:20,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 15:57:20,582 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:57:20,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:20,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1614850616, now seen corresponding path program 5 times [2024-06-20 15:57:20,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:20,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257286945] [2024-06-20 15:57:20,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:20,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:24,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:24,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257286945] [2024-06-20 15:57:24,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257286945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:24,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:24,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:57:24,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139615767] [2024-06-20 15:57:24,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:24,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:57:24,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:24,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:57:24,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:57:24,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:57:24,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 464 transitions, 5529 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:24,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:24,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:57:24,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:27,450 INFO L124 PetriNetUnfolderBase]: 5655/8759 cut-off events. [2024-06-20 15:57:27,450 INFO L125 PetriNetUnfolderBase]: For 2060307/2060313 co-relation queries the response was YES. [2024-06-20 15:57:27,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95973 conditions, 8759 events. 5655/8759 cut-off events. For 2060307/2060313 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 52863 event pairs, 1230 based on Foata normal form. 18/8774 useless extension candidates. Maximal degree in co-relation 95801. Up to 8170 conditions per place. [2024-06-20 15:57:27,592 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 455 selfloop transitions, 53 changer transitions 0/511 dead transitions. [2024-06-20 15:57:27,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 511 transitions, 6746 flow [2024-06-20 15:57:27,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:57:27,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:57:27,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-20 15:57:27,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 15:57:27,594 INFO L175 Difference]: Start difference. First operand has 368 places, 464 transitions, 5529 flow. Second operand 10 states and 168 transitions. [2024-06-20 15:57:27,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 511 transitions, 6746 flow [2024-06-20 15:57:34,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 511 transitions, 6496 flow, removed 88 selfloop flow, removed 8 redundant places. [2024-06-20 15:57:34,298 INFO L231 Difference]: Finished difference. Result has 370 places, 465 transitions, 5411 flow [2024-06-20 15:57:34,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5279, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5411, PETRI_PLACES=370, PETRI_TRANSITIONS=465} [2024-06-20 15:57:34,299 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-20 15:57:34,299 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 465 transitions, 5411 flow [2024-06-20 15:57:34,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:34,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:34,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:34,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 15:57:34,299 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:57:34,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:34,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1317205120, now seen corresponding path program 1 times [2024-06-20 15:57:34,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:34,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000785448] [2024-06-20 15:57:34,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:34,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:36,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:36,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000785448] [2024-06-20 15:57:36,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000785448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:36,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:36,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:57:36,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887678822] [2024-06-20 15:57:36,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:36,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:57:36,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:36,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:57:36,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:57:36,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:57:36,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 465 transitions, 5411 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:36,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:36,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:57:36,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:38,844 INFO L124 PetriNetUnfolderBase]: 5665/8773 cut-off events. [2024-06-20 15:57:38,845 INFO L125 PetriNetUnfolderBase]: For 2026102/2026108 co-relation queries the response was YES. [2024-06-20 15:57:38,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95619 conditions, 8773 events. 5665/8773 cut-off events. For 2026102/2026108 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 53007 event pairs, 1227 based on Foata normal form. 8/8778 useless extension candidates. Maximal degree in co-relation 95446. Up to 8619 conditions per place. [2024-06-20 15:57:38,966 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 459 selfloop transitions, 34 changer transitions 0/496 dead transitions. [2024-06-20 15:57:38,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 496 transitions, 6601 flow [2024-06-20 15:57:38,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:57:38,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:57:38,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 15:57:38,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 15:57:38,968 INFO L175 Difference]: Start difference. First operand has 370 places, 465 transitions, 5411 flow. Second operand 8 states and 130 transitions. [2024-06-20 15:57:38,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 496 transitions, 6601 flow [2024-06-20 15:57:44,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 496 transitions, 6502 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 15:57:44,038 INFO L231 Difference]: Finished difference. Result has 370 places, 468 transitions, 5505 flow [2024-06-20 15:57:44,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5312, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5505, PETRI_PLACES=370, PETRI_TRANSITIONS=468} [2024-06-20 15:57:44,039 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-20 15:57:44,039 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 468 transitions, 5505 flow [2024-06-20 15:57:44,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:44,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:44,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:44,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 15:57:44,040 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:57:44,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:44,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1310538880, now seen corresponding path program 2 times [2024-06-20 15:57:44,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:44,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603775188] [2024-06-20 15:57:44,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:44,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:45,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:45,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603775188] [2024-06-20 15:57:45,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603775188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:45,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:45,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:57:45,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194786204] [2024-06-20 15:57:45,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:45,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:57:45,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:45,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:57:45,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:57:45,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:57:45,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 468 transitions, 5505 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:45,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:45,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:57:45,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:48,414 INFO L124 PetriNetUnfolderBase]: 5675/8787 cut-off events. [2024-06-20 15:57:48,415 INFO L125 PetriNetUnfolderBase]: For 2029124/2029130 co-relation queries the response was YES. [2024-06-20 15:57:48,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96261 conditions, 8787 events. 5675/8787 cut-off events. For 2029124/2029130 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 53092 event pairs, 1254 based on Foata normal form. 8/8792 useless extension candidates. Maximal degree in co-relation 96087. Up to 8673 conditions per place. [2024-06-20 15:57:48,567 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 464 selfloop transitions, 31 changer transitions 0/498 dead transitions. [2024-06-20 15:57:48,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 498 transitions, 6706 flow [2024-06-20 15:57:48,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:57:48,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:57:48,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 15:57:48,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 15:57:48,569 INFO L175 Difference]: Start difference. First operand has 370 places, 468 transitions, 5505 flow. Second operand 8 states and 126 transitions. [2024-06-20 15:57:48,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 498 transitions, 6706 flow [2024-06-20 15:57:55,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 498 transitions, 6537 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-20 15:57:55,223 INFO L231 Difference]: Finished difference. Result has 373 places, 474 transitions, 5555 flow [2024-06-20 15:57:55,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5336, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5555, PETRI_PLACES=373, PETRI_TRANSITIONS=474} [2024-06-20 15:57:55,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-20 15:57:55,223 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 474 transitions, 5555 flow [2024-06-20 15:57:55,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:55,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:55,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:55,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 15:57:55,224 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:57:55,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:55,224 INFO L85 PathProgramCache]: Analyzing trace with hash 562183350, now seen corresponding path program 1 times [2024-06-20 15:57:55,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:55,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887735449] [2024-06-20 15:57:55,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:55,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:57,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:57,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887735449] [2024-06-20 15:57:57,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887735449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:57,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:57,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:57:57,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955607104] [2024-06-20 15:57:57,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:57,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:57:57,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:57,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:57:57,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:57:57,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:57:57,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 474 transitions, 5555 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:57,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:57,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:57:57,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:00,248 INFO L124 PetriNetUnfolderBase]: 5683/8799 cut-off events. [2024-06-20 15:58:00,248 INFO L125 PetriNetUnfolderBase]: For 2065782/2065788 co-relation queries the response was YES. [2024-06-20 15:58:00,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97546 conditions, 8799 events. 5683/8799 cut-off events. For 2065782/2065788 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 52926 event pairs, 1103 based on Foata normal form. 8/8804 useless extension candidates. Maximal degree in co-relation 97370. Up to 8654 conditions per place. [2024-06-20 15:58:00,391 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 474 selfloop transitions, 27 changer transitions 0/504 dead transitions. [2024-06-20 15:58:00,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 504 transitions, 6733 flow [2024-06-20 15:58:00,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:58:00,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:58:00,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 15:58:00,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 15:58:00,393 INFO L175 Difference]: Start difference. First operand has 373 places, 474 transitions, 5555 flow. Second operand 8 states and 128 transitions. [2024-06-20 15:58:00,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 504 transitions, 6733 flow [2024-06-20 15:58:06,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 504 transitions, 6567 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-20 15:58:06,533 INFO L231 Difference]: Finished difference. Result has 376 places, 476 transitions, 5540 flow [2024-06-20 15:58:06,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5389, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5540, PETRI_PLACES=376, PETRI_TRANSITIONS=476} [2024-06-20 15:58:06,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 333 predicate places. [2024-06-20 15:58:06,534 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 476 transitions, 5540 flow [2024-06-20 15:58:06,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:06,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:06,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:06,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 15:58:06,535 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:06,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:06,535 INFO L85 PathProgramCache]: Analyzing trace with hash 562452120, now seen corresponding path program 2 times [2024-06-20 15:58:06,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:06,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275158306] [2024-06-20 15:58:06,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:06,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:08,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:08,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275158306] [2024-06-20 15:58:08,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275158306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:08,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:08,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:58:08,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704069953] [2024-06-20 15:58:08,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:08,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:58:08,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:08,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:58:08,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:58:09,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:58:09,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 476 transitions, 5540 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:09,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:09,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:58:09,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:11,710 INFO L124 PetriNetUnfolderBase]: 5691/8811 cut-off events. [2024-06-20 15:58:11,710 INFO L125 PetriNetUnfolderBase]: For 2095088/2095094 co-relation queries the response was YES. [2024-06-20 15:58:11,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97985 conditions, 8811 events. 5691/8811 cut-off events. For 2095088/2095094 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 53304 event pairs, 1258 based on Foata normal form. 8/8816 useless extension candidates. Maximal degree in co-relation 97808. Up to 8690 conditions per place. [2024-06-20 15:58:11,846 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 469 selfloop transitions, 30 changer transitions 0/502 dead transitions. [2024-06-20 15:58:11,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 502 transitions, 6706 flow [2024-06-20 15:58:11,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:58:11,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:58:11,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 15:58:11,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 15:58:11,847 INFO L175 Difference]: Start difference. First operand has 376 places, 476 transitions, 5540 flow. Second operand 8 states and 126 transitions. [2024-06-20 15:58:11,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 502 transitions, 6706 flow [2024-06-20 15:58:18,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 502 transitions, 6571 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-20 15:58:18,061 INFO L231 Difference]: Finished difference. Result has 378 places, 478 transitions, 5566 flow [2024-06-20 15:58:18,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5405, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5566, PETRI_PLACES=378, PETRI_TRANSITIONS=478} [2024-06-20 15:58:18,061 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-20 15:58:18,061 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 478 transitions, 5566 flow [2024-06-20 15:58:18,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:18,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:18,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:18,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 15:58:18,062 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:18,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:18,062 INFO L85 PathProgramCache]: Analyzing trace with hash 571718454, now seen corresponding path program 1 times [2024-06-20 15:58:18,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:18,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13237408] [2024-06-20 15:58:18,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:18,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:20,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:20,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13237408] [2024-06-20 15:58:20,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13237408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:20,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:20,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:58:20,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545078390] [2024-06-20 15:58:20,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:20,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:58:20,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:20,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:58:20,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:58:20,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:58:20,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 478 transitions, 5566 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:20,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:20,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:58:20,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:23,469 INFO L124 PetriNetUnfolderBase]: 5711/8839 cut-off events. [2024-06-20 15:58:23,470 INFO L125 PetriNetUnfolderBase]: For 2143702/2143708 co-relation queries the response was YES. [2024-06-20 15:58:23,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98634 conditions, 8839 events. 5711/8839 cut-off events. For 2143702/2143708 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 53448 event pairs, 1257 based on Foata normal form. 10/8846 useless extension candidates. Maximal degree in co-relation 98456. Up to 8700 conditions per place. [2024-06-20 15:58:23,607 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 471 selfloop transitions, 34 changer transitions 0/508 dead transitions. [2024-06-20 15:58:23,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 508 transitions, 6780 flow [2024-06-20 15:58:23,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:23,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-20 15:58:23,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-20 15:58:23,609 INFO L175 Difference]: Start difference. First operand has 378 places, 478 transitions, 5566 flow. Second operand 9 states and 140 transitions. [2024-06-20 15:58:23,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 508 transitions, 6780 flow [2024-06-20 15:58:29,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 508 transitions, 6635 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-20 15:58:29,199 INFO L231 Difference]: Finished difference. Result has 381 places, 481 transitions, 5609 flow [2024-06-20 15:58:29,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5421, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5609, PETRI_PLACES=381, PETRI_TRANSITIONS=481} [2024-06-20 15:58:29,200 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-20 15:58:29,200 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 481 transitions, 5609 flow [2024-06-20 15:58:29,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:29,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:29,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:29,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 15:58:29,201 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:29,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:29,201 INFO L85 PathProgramCache]: Analyzing trace with hash 680334456, now seen corresponding path program 3 times [2024-06-20 15:58:29,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:29,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227525500] [2024-06-20 15:58:29,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:29,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:31,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:31,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227525500] [2024-06-20 15:58:31,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227525500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:31,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:31,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:58:31,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303762717] [2024-06-20 15:58:31,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:31,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:58:31,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:31,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:58:31,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:58:31,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:58:31,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 481 transitions, 5609 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:31,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:31,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:58:31,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:33,908 INFO L124 PetriNetUnfolderBase]: 5721/8854 cut-off events. [2024-06-20 15:58:33,909 INFO L125 PetriNetUnfolderBase]: For 2161784/2161784 co-relation queries the response was YES. [2024-06-20 15:58:34,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99515 conditions, 8854 events. 5721/8854 cut-off events. For 2161784/2161784 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 53587 event pairs, 1209 based on Foata normal form. 2/8853 useless extension candidates. Maximal degree in co-relation 99336. Up to 8657 conditions per place. [2024-06-20 15:58:34,059 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 467 selfloop transitions, 39 changer transitions 0/509 dead transitions. [2024-06-20 15:58:34,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 509 transitions, 6835 flow [2024-06-20 15:58:34,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:58:34,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:58:34,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 15:58:34,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 15:58:34,061 INFO L175 Difference]: Start difference. First operand has 381 places, 481 transitions, 5609 flow. Second operand 8 states and 130 transitions. [2024-06-20 15:58:34,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 509 transitions, 6835 flow [2024-06-20 15:58:41,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 509 transitions, 6673 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-20 15:58:41,199 INFO L231 Difference]: Finished difference. Result has 382 places, 484 transitions, 5667 flow [2024-06-20 15:58:41,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5447, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5667, PETRI_PLACES=382, PETRI_TRANSITIONS=484} [2024-06-20 15:58:41,212 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-20 15:58:41,214 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 484 transitions, 5667 flow [2024-06-20 15:58:41,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:41,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:41,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:41,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 15:58:41,217 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:41,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:41,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1201735204, now seen corresponding path program 1 times [2024-06-20 15:58:41,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:41,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001137685] [2024-06-20 15:58:41,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:41,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:43,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:43,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001137685] [2024-06-20 15:58:43,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001137685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:43,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:43,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:58:43,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377629634] [2024-06-20 15:58:43,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:43,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:58:43,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:43,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:58:43,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:58:43,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:58:43,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 484 transitions, 5667 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:43,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:43,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:58:43,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:46,573 INFO L124 PetriNetUnfolderBase]: 5736/8874 cut-off events. [2024-06-20 15:58:46,574 INFO L125 PetriNetUnfolderBase]: For 2204920/2204926 co-relation queries the response was YES. [2024-06-20 15:58:46,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100487 conditions, 8874 events. 5736/8874 cut-off events. For 2204920/2204926 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 53710 event pairs, 1258 based on Foata normal form. 9/8880 useless extension candidates. Maximal degree in co-relation 100307. Up to 8804 conditions per place. [2024-06-20 15:58:46,707 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 490 selfloop transitions, 20 changer transitions 0/513 dead transitions. [2024-06-20 15:58:46,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 513 transitions, 6959 flow [2024-06-20 15:58:46,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:58:46,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:58:46,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 15:58:46,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 15:58:46,708 INFO L175 Difference]: Start difference. First operand has 382 places, 484 transitions, 5667 flow. Second operand 8 states and 126 transitions. [2024-06-20 15:58:46,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 513 transitions, 6959 flow [2024-06-20 15:58:52,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 513 transitions, 6761 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-20 15:58:52,500 INFO L231 Difference]: Finished difference. Result has 384 places, 487 transitions, 5641 flow [2024-06-20 15:58:52,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5469, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5641, PETRI_PLACES=384, PETRI_TRANSITIONS=487} [2024-06-20 15:58:52,502 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-20 15:58:52,503 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 487 transitions, 5641 flow [2024-06-20 15:58:52,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:52,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:52,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:52,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 15:58:52,505 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:52,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:52,505 INFO L85 PathProgramCache]: Analyzing trace with hash -66553190, now seen corresponding path program 2 times [2024-06-20 15:58:52,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:52,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683452610] [2024-06-20 15:58:52,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:52,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:54,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:54,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:54,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683452610] [2024-06-20 15:58:54,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683452610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:54,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:54,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:58:54,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284945778] [2024-06-20 15:58:54,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:54,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:58:54,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:54,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:58:54,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:58:54,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:58:54,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 487 transitions, 5641 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:54,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:54,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:58:54,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:58,046 INFO L124 PetriNetUnfolderBase]: 5746/8888 cut-off events. [2024-06-20 15:58:58,047 INFO L125 PetriNetUnfolderBase]: For 2234212/2234218 co-relation queries the response was YES. [2024-06-20 15:58:58,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101351 conditions, 8888 events. 5746/8888 cut-off events. For 2234212/2234218 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 53784 event pairs, 1258 based on Foata normal form. 8/8893 useless extension candidates. Maximal degree in co-relation 101170. Up to 8827 conditions per place. [2024-06-20 15:58:58,199 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 489 selfloop transitions, 20 changer transitions 0/512 dead transitions. [2024-06-20 15:58:58,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 512 transitions, 6907 flow [2024-06-20 15:58:58,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:58:58,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:58:58,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-20 15:58:58,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3630952380952381 [2024-06-20 15:58:58,201 INFO L175 Difference]: Start difference. First operand has 384 places, 487 transitions, 5641 flow. Second operand 8 states and 122 transitions. [2024-06-20 15:58:58,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 512 transitions, 6907 flow [2024-06-20 15:59:04,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 512 transitions, 6767 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-20 15:59:04,921 INFO L231 Difference]: Finished difference. Result has 386 places, 490 transitions, 5701 flow [2024-06-20 15:59:04,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5501, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5701, PETRI_PLACES=386, PETRI_TRANSITIONS=490} [2024-06-20 15:59:04,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-20 15:59:04,922 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 490 transitions, 5701 flow [2024-06-20 15:59:04,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:04,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:04,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:04,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 15:59:04,922 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:04,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:04,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1113693283, now seen corresponding path program 1 times [2024-06-20 15:59:04,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:04,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544532475] [2024-06-20 15:59:04,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:04,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:04,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:07,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:07,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:07,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544532475] [2024-06-20 15:59:07,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544532475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:07,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:07,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:07,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298880783] [2024-06-20 15:59:07,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:07,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:07,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:07,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:07,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:07,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:59:07,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 490 transitions, 5701 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:07,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:07,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:59:07,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:10,348 INFO L124 PetriNetUnfolderBase]: 5751/8895 cut-off events. [2024-06-20 15:59:10,348 INFO L125 PetriNetUnfolderBase]: For 2259431/2259437 co-relation queries the response was YES. [2024-06-20 15:59:10,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101796 conditions, 8895 events. 5751/8895 cut-off events. For 2259431/2259437 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 53827 event pairs, 1257 based on Foata normal form. 7/8899 useless extension candidates. Maximal degree in co-relation 101614. Up to 8837 conditions per place. [2024-06-20 15:59:10,603 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 491 selfloop transitions, 20 changer transitions 0/514 dead transitions. [2024-06-20 15:59:10,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 514 transitions, 6913 flow [2024-06-20 15:59:10,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:10,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:10,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-20 15:59:10,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-20 15:59:10,604 INFO L175 Difference]: Start difference. First operand has 386 places, 490 transitions, 5701 flow. Second operand 8 states and 121 transitions. [2024-06-20 15:59:10,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 514 transitions, 6913 flow [2024-06-20 15:59:16,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 514 transitions, 6735 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-20 15:59:16,382 INFO L231 Difference]: Finished difference. Result has 388 places, 493 transitions, 5697 flow [2024-06-20 15:59:16,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5523, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5697, PETRI_PLACES=388, PETRI_TRANSITIONS=493} [2024-06-20 15:59:16,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-20 15:59:16,383 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 493 transitions, 5697 flow [2024-06-20 15:59:16,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:16,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:16,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:16,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 15:59:16,383 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:16,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:16,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1501558332, now seen corresponding path program 4 times [2024-06-20 15:59:16,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:16,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115675939] [2024-06-20 15:59:16,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:16,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:18,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:18,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115675939] [2024-06-20 15:59:18,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115675939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:18,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:18,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:18,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459576690] [2024-06-20 15:59:18,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:18,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:18,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:18,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:18,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:18,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:59:18,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 493 transitions, 5697 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:18,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:18,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:59:18,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:21,763 INFO L124 PetriNetUnfolderBase]: 5769/8921 cut-off events. [2024-06-20 15:59:21,763 INFO L125 PetriNetUnfolderBase]: For 2307283/2307283 co-relation queries the response was YES. [2024-06-20 15:59:21,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102786 conditions, 8921 events. 5769/8921 cut-off events. For 2307283/2307283 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 53987 event pairs, 1206 based on Foata normal form. 2/8920 useless extension candidates. Maximal degree in co-relation 102603. Up to 8699 conditions per place. [2024-06-20 15:59:21,896 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 469 selfloop transitions, 50 changer transitions 0/522 dead transitions. [2024-06-20 15:59:21,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 522 transitions, 7349 flow [2024-06-20 15:59:21,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:21,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 15:59:21,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-20 15:59:21,898 INFO L175 Difference]: Start difference. First operand has 388 places, 493 transitions, 5697 flow. Second operand 8 states and 129 transitions. [2024-06-20 15:59:21,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 522 transitions, 7349 flow [2024-06-20 15:59:28,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 522 transitions, 7197 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-20 15:59:28,067 INFO L231 Difference]: Finished difference. Result has 390 places, 499 transitions, 5941 flow [2024-06-20 15:59:28,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5545, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5941, PETRI_PLACES=390, PETRI_TRANSITIONS=499} [2024-06-20 15:59:28,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-20 15:59:28,068 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 499 transitions, 5941 flow [2024-06-20 15:59:28,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:28,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:28,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:28,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 15:59:28,068 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:28,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:28,068 INFO L85 PathProgramCache]: Analyzing trace with hash 887583499, now seen corresponding path program 2 times [2024-06-20 15:59:28,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:28,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512818167] [2024-06-20 15:59:28,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:28,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:30,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:30,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512818167] [2024-06-20 15:59:30,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512818167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:30,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:30,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:30,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237858494] [2024-06-20 15:59:30,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:30,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:30,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:30,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:30,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:30,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:59:30,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 499 transitions, 5941 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:30,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:30,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:59:30,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:33,422 INFO L124 PetriNetUnfolderBase]: 5774/8927 cut-off events. [2024-06-20 15:59:33,422 INFO L125 PetriNetUnfolderBase]: For 2342120/2342126 co-relation queries the response was YES. [2024-06-20 15:59:33,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103732 conditions, 8927 events. 5774/8927 cut-off events. For 2342120/2342126 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 54036 event pairs, 1257 based on Foata normal form. 7/8931 useless extension candidates. Maximal degree in co-relation 103548. Up to 8878 conditions per place. [2024-06-20 15:59:33,562 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 497 selfloop transitions, 20 changer transitions 0/520 dead transitions. [2024-06-20 15:59:33,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 520 transitions, 7163 flow [2024-06-20 15:59:33,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:33,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:33,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-20 15:59:33,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-06-20 15:59:33,564 INFO L175 Difference]: Start difference. First operand has 390 places, 499 transitions, 5941 flow. Second operand 8 states and 118 transitions. [2024-06-20 15:59:33,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 520 transitions, 7163 flow [2024-06-20 15:59:41,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 520 transitions, 6975 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-20 15:59:41,078 INFO L231 Difference]: Finished difference. Result has 394 places, 502 transitions, 5935 flow [2024-06-20 15:59:41,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5753, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5935, PETRI_PLACES=394, PETRI_TRANSITIONS=502} [2024-06-20 15:59:41,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-20 15:59:41,079 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 502 transitions, 5935 flow [2024-06-20 15:59:41,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:41,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:41,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:41,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 15:59:41,079 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:41,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:41,080 INFO L85 PathProgramCache]: Analyzing trace with hash -995052190, now seen corresponding path program 5 times [2024-06-20 15:59:41,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:41,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126574165] [2024-06-20 15:59:41,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:41,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:43,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:43,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126574165] [2024-06-20 15:59:43,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126574165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:43,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:43,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:43,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931519963] [2024-06-20 15:59:43,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:43,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:43,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:43,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:43,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:43,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:59:43,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 502 transitions, 5935 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:43,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:43,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:59:43,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:46,279 INFO L124 PetriNetUnfolderBase]: 5784/8942 cut-off events. [2024-06-20 15:59:46,279 INFO L125 PetriNetUnfolderBase]: For 2384555/2384555 co-relation queries the response was YES. [2024-06-20 15:59:46,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104401 conditions, 8942 events. 5784/8942 cut-off events. For 2384555/2384555 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 54058 event pairs, 1264 based on Foata normal form. 2/8941 useless extension candidates. Maximal degree in co-relation 104215. Up to 8809 conditions per place. [2024-06-20 15:59:46,440 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 484 selfloop transitions, 38 changer transitions 0/525 dead transitions. [2024-06-20 15:59:46,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 525 transitions, 7198 flow [2024-06-20 15:59:46,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:46,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:46,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-20 15:59:46,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-20 15:59:46,441 INFO L175 Difference]: Start difference. First operand has 394 places, 502 transitions, 5935 flow. Second operand 8 states and 123 transitions. [2024-06-20 15:59:46,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 525 transitions, 7198 flow [2024-06-20 15:59:53,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 525 transitions, 7038 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-20 15:59:53,372 INFO L231 Difference]: Finished difference. Result has 397 places, 508 transitions, 6036 flow [2024-06-20 15:59:53,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5775, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6036, PETRI_PLACES=397, PETRI_TRANSITIONS=508} [2024-06-20 15:59:53,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-20 15:59:53,373 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 508 transitions, 6036 flow [2024-06-20 15:59:53,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:53,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:53,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:53,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 15:59:53,374 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:53,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:53,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1494206682, now seen corresponding path program 6 times [2024-06-20 15:59:53,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:53,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595016279] [2024-06-20 15:59:53,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:53,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:55,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:55,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595016279] [2024-06-20 15:59:55,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595016279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:55,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:55,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:55,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461167781] [2024-06-20 15:59:55,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:55,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:55,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:55,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:55,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:55,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 15:59:55,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 508 transitions, 6036 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:55,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:55,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 15:59:55,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:58,434 INFO L124 PetriNetUnfolderBase]: 5802/8967 cut-off events. [2024-06-20 15:59:58,434 INFO L125 PetriNetUnfolderBase]: For 2433960/2433960 co-relation queries the response was YES. [2024-06-20 15:59:58,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106311 conditions, 8967 events. 5802/8967 cut-off events. For 2433960/2433960 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 54263 event pairs, 1262 based on Foata normal form. 2/8966 useless extension candidates. Maximal degree in co-relation 106123. Up to 8813 conditions per place. [2024-06-20 15:59:58,578 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 482 selfloop transitions, 48 changer transitions 0/533 dead transitions. [2024-06-20 15:59:58,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 533 transitions, 7732 flow [2024-06-20 15:59:58,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:58,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:58,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 15:59:58,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 15:59:58,580 INFO L175 Difference]: Start difference. First operand has 397 places, 508 transitions, 6036 flow. Second operand 8 states and 126 transitions. [2024-06-20 15:59:58,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 533 transitions, 7732 flow [2024-06-20 16:00:05,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 533 transitions, 7535 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-06-20 16:00:05,663 INFO L231 Difference]: Finished difference. Result has 401 places, 514 transitions, 6259 flow [2024-06-20 16:00:05,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5839, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6259, PETRI_PLACES=401, PETRI_TRANSITIONS=514} [2024-06-20 16:00:05,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-20 16:00:05,664 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 514 transitions, 6259 flow [2024-06-20 16:00:05,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:05,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:05,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:05,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 16:00:05,664 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:05,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:05,665 INFO L85 PathProgramCache]: Analyzing trace with hash -994932034, now seen corresponding path program 3 times [2024-06-20 16:00:05,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:05,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386661403] [2024-06-20 16:00:05,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:05,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:07,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:07,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386661403] [2024-06-20 16:00:07,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386661403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:07,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:07,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:07,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077583714] [2024-06-20 16:00:07,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:07,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:07,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:07,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:07,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:08,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:00:08,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 514 transitions, 6259 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:08,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:08,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:00:08,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:10,919 INFO L124 PetriNetUnfolderBase]: 5812/8980 cut-off events. [2024-06-20 16:00:10,919 INFO L125 PetriNetUnfolderBase]: For 2475951/2475957 co-relation queries the response was YES. [2024-06-20 16:00:11,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107231 conditions, 8980 events. 5812/8980 cut-off events. For 2475951/2475957 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 54317 event pairs, 1258 based on Foata normal form. 8/8985 useless extension candidates. Maximal degree in co-relation 107042. Up to 8928 conditions per place. [2024-06-20 16:00:11,079 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 513 selfloop transitions, 20 changer transitions 0/536 dead transitions. [2024-06-20 16:00:11,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 536 transitions, 7579 flow [2024-06-20 16:00:11,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:11,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:11,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-20 16:00:11,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-20 16:00:11,081 INFO L175 Difference]: Start difference. First operand has 401 places, 514 transitions, 6259 flow. Second operand 8 states and 119 transitions. [2024-06-20 16:00:11,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 536 transitions, 7579 flow [2024-06-20 16:00:18,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 536 transitions, 7373 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-20 16:00:18,295 INFO L231 Difference]: Finished difference. Result has 405 places, 517 transitions, 6269 flow [2024-06-20 16:00:18,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6053, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6269, PETRI_PLACES=405, PETRI_TRANSITIONS=517} [2024-06-20 16:00:18,296 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-20 16:00:18,296 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 517 transitions, 6269 flow [2024-06-20 16:00:18,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:18,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:18,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:18,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 16:00:18,297 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:18,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:18,297 INFO L85 PathProgramCache]: Analyzing trace with hash -994931817, now seen corresponding path program 3 times [2024-06-20 16:00:18,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:18,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60452645] [2024-06-20 16:00:18,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:18,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15