./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix051_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/mix051_tso.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix051_tso.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix051_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-cde23df-m [2024-06-14 12:35:18,009 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:35:18,057 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:35:18,060 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:35:18,061 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:35:18,074 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:35:18,075 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:35:18,075 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:35:18,075 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:35:18,076 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:35:18,076 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:35:18,076 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:35:18,077 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:35:18,077 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:35:18,077 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:35:18,078 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:35:18,078 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:35:18,078 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:35:18,079 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:35:18,079 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:35:18,079 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:35:18,079 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:35:18,080 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:35:18,080 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:35:18,080 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:35:18,081 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:35:18,081 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:35:18,081 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:35:18,081 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:35:18,082 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:35:18,082 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:35:18,082 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:35:18,082 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:35:18,083 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:35:18,083 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:35:18,083 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:35:18,083 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:35:18,084 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:35:18,084 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:35:18,084 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:35:18,084 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:35:18,085 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:35:18,085 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:35:18,085 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:35:18,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:35:18,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:35:18,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:35:18,335 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:35:18,335 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:35:18,336 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix051_tso.oepc.i [2024-06-14 12:35:19,408 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:35:19,633 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:35:19,634 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix051_tso.oepc.i [2024-06-14 12:35:19,653 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d049653db/d2cd76ce5e2c471c9118fb5ff255f26f/FLAG0e814ea13 [2024-06-14 12:35:19,664 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d049653db/d2cd76ce5e2c471c9118fb5ff255f26f [2024-06-14 12:35:19,666 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:35:19,667 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:35:19,667 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix051_tso.oepc.yml/witness.yml [2024-06-14 12:35:19,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:35:19,838 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:35:19,839 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:35:19,839 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:35:19,843 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:35:19,844 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:35:19" (1/2) ... [2024-06-14 12:35:19,845 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41536c6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:19, skipping insertion in model container [2024-06-14 12:35:19,845 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:35:19" (1/2) ... [2024-06-14 12:35:19,846 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6d8ada3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:19, skipping insertion in model container [2024-06-14 12:35:19,847 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:35:19" (2/2) ... [2024-06-14 12:35:19,847 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41536c6f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:19, skipping insertion in model container [2024-06-14 12:35:19,847 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:35:19" (2/2) ... [2024-06-14 12:35:19,848 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:35:20,004 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:35:20,006 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((((! 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 && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_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 || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) [2024-06-14 12:35:20,006 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_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))) [2024-06-14 12:35:20,006 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((! 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 && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_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 || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) [2024-06-14 12:35:20,006 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_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))) [2024-06-14 12:35:20,006 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:35:20,007 INFO L106 edCorrectnessWitness]: ghost_update [L849-L849] multithreaded = 1; [2024-06-14 12:35:20,035 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:35:20,367 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:35:20,380 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:35:20,506 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:35:20,554 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:35:20,558 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:20 WrapperNode [2024-06-14 12:35:20,558 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:35:20,559 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:35:20,559 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:35:20,559 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:35:20,565 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 14.06 12:35:20" (1/1) ... [2024-06-14 12:35:20,579 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 14.06 12:35:20" (1/1) ... [2024-06-14 12:35:20,616 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 157 [2024-06-14 12:35:20,616 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:35:20,628 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:35:20,628 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:35:20,628 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:35:20,637 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:20" (1/1) ... [2024-06-14 12:35:20,637 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:20" (1/1) ... [2024-06-14 12:35:20,640 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:20" (1/1) ... [2024-06-14 12:35:20,655 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 12:35:20,655 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:20" (1/1) ... [2024-06-14 12:35:20,655 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:20" (1/1) ... [2024-06-14 12:35:20,665 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:20" (1/1) ... [2024-06-14 12:35:20,666 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:20" (1/1) ... [2024-06-14 12:35:20,669 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:20" (1/1) ... [2024-06-14 12:35:20,670 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:20" (1/1) ... [2024-06-14 12:35:20,674 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:35:20,674 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:35:20,674 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:35:20,674 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:35:20,675 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:20" (1/1) ... [2024-06-14 12:35:20,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:35:20,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:35:20,713 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 12:35:20,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 12:35:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:35:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:35:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:35:20,742 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:35:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:35:20,743 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:35:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:35:20,743 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:35:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 12:35:20,743 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 12:35:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:35:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:35:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:35:20,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:35:20,745 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:35:20,842 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:35:20,844 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:35:21,207 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:35:21,207 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:35:21,392 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:35:21,392 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:35:21,392 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:35:21 BoogieIcfgContainer [2024-06-14 12:35:21,393 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:35:21,394 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:35:21,394 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:35:21,397 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:35:21,397 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:35:19" (1/4) ... [2024-06-14 12:35:21,397 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f87597c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:35:21, skipping insertion in model container [2024-06-14 12:35:21,397 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:35:19" (2/4) ... [2024-06-14 12:35:21,398 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f87597c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:35:21, skipping insertion in model container [2024-06-14 12:35:21,398 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:20" (3/4) ... [2024-06-14 12:35:21,398 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f87597c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:35:21, skipping insertion in model container [2024-06-14 12:35:21,398 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:35:21" (4/4) ... [2024-06-14 12:35:21,399 INFO L112 eAbstractionObserver]: Analyzing ICFG mix051_tso.oepc.i [2024-06-14 12:35:21,413 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:35:21,414 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 12:35:21,414 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:35:21,451 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:35:21,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-14 12:35:21,512 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-14 12:35:21,512 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:35:21,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:35:21,516 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-14 12:35:21,520 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-14 12:35:21,533 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:35:21,540 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;@744c04bb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:35:21,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 12:35:21,546 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:35:21,546 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:35:21,546 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:35:21,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:21,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:35:21,547 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:21,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:21,553 INFO L85 PathProgramCache]: Analyzing trace with hash -472909073, now seen corresponding path program 1 times [2024-06-14 12:35:21,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:21,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749479187] [2024-06-14 12:35:21,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:21,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:22,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:22,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:22,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749479187] [2024-06-14 12:35:22,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749479187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:22,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:22,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:35:22,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978507062] [2024-06-14 12:35:22,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:22,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:35:22,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:22,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:35:22,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:35:22,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:35:22,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:22,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:22,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:35:22,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:24,267 INFO L124 PetriNetUnfolderBase]: 8192/11589 cut-off events. [2024-06-14 12:35:24,267 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-06-14 12:35:24,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23154 conditions, 11589 events. 8192/11589 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 63957 event pairs, 6310 based on Foata normal form. 1/11375 useless extension candidates. Maximal degree in co-relation 23138. Up to 11172 conditions per place. [2024-06-14 12:35:24,334 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 44 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-14 12:35:24,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 231 flow [2024-06-14 12:35:24,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:35:24,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:35:24,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-06-14 12:35:24,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-14 12:35:24,345 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 92 transitions. [2024-06-14 12:35:24,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 231 flow [2024-06-14 12:35:24,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 224 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:24,353 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-14 12:35:24,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-14 12:35:24,357 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-14 12:35:24,357 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-14 12:35:24,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:24,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:24,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:24,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:35:24,358 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:24,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:24,359 INFO L85 PathProgramCache]: Analyzing trace with hash 800965838, now seen corresponding path program 1 times [2024-06-14 12:35:24,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:24,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252090941] [2024-06-14 12:35:24,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:24,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:25,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:25,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252090941] [2024-06-14 12:35:25,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252090941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:25,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:25,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:35:25,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648978154] [2024-06-14 12:35:25,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:25,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:35:25,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:25,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:35:25,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:35:25,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-14 12:35:25,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:25,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:25,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-14 12:35:25,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:26,659 INFO L124 PetriNetUnfolderBase]: 9577/13188 cut-off events. [2024-06-14 12:35:26,659 INFO L125 PetriNetUnfolderBase]: For 2471/2471 co-relation queries the response was YES. [2024-06-14 12:35:26,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30039 conditions, 13188 events. 9577/13188 cut-off events. For 2471/2471 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 69972 event pairs, 6775 based on Foata normal form. 4/13160 useless extension candidates. Maximal degree in co-relation 30024. Up to 12982 conditions per place. [2024-06-14 12:35:26,732 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 55 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-14 12:35:26,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 325 flow [2024-06-14 12:35:26,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:35:26,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:35:26,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-06-14 12:35:26,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2024-06-14 12:35:26,735 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 116 transitions. [2024-06-14 12:35:26,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 325 flow [2024-06-14 12:35:26,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:35:26,739 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-14 12:35:26,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-14 12:35:26,741 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-14 12:35:26,741 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-14 12:35:26,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:26,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:26,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:26,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:35:26,744 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:26,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:26,748 INFO L85 PathProgramCache]: Analyzing trace with hash -939861124, now seen corresponding path program 1 times [2024-06-14 12:35:26,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:26,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710115517] [2024-06-14 12:35:26,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:26,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:27,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:27,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710115517] [2024-06-14 12:35:27,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710115517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:27,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:27,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:35:27,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024295945] [2024-06-14 12:35:27,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:27,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:35:27,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:27,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:35:27,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:35:27,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-14 12:35:27,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 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) [2024-06-14 12:35:27,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:27,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-14 12:35:27,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:28,711 INFO L124 PetriNetUnfolderBase]: 9557/13166 cut-off events. [2024-06-14 12:35:28,711 INFO L125 PetriNetUnfolderBase]: For 7067/7067 co-relation queries the response was YES. [2024-06-14 12:35:28,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33392 conditions, 13166 events. 9557/13166 cut-off events. For 7067/7067 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 69885 event pairs, 5407 based on Foata normal form. 8/13142 useless extension candidates. Maximal degree in co-relation 33375. Up to 12912 conditions per place. [2024-06-14 12:35:28,779 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 66 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2024-06-14 12:35:28,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 85 transitions, 437 flow [2024-06-14 12:35:28,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:35:28,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:35:28,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-14 12:35:28,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-14 12:35:28,781 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 5 states and 143 transitions. [2024-06-14 12:35:28,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 85 transitions, 437 flow [2024-06-14 12:35:28,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 418 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 12:35:28,785 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 227 flow [2024-06-14 12:35:28,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=227, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-06-14 12:35:28,786 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2024-06-14 12:35:28,786 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 227 flow [2024-06-14 12:35:28,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 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) [2024-06-14 12:35:28,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:28,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:28,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:35:28,787 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:28,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:28,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1263353413, now seen corresponding path program 1 times [2024-06-14 12:35:28,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:28,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682773136] [2024-06-14 12:35:28,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:28,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:30,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:30,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682773136] [2024-06-14 12:35:30,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682773136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:30,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:30,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:35:30,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297728629] [2024-06-14 12:35:30,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:30,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:35:30,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:30,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:35:30,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:35:30,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-14 12:35:30,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 227 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:30,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:30,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-14 12:35:30,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:31,507 INFO L124 PetriNetUnfolderBase]: 9541/13144 cut-off events. [2024-06-14 12:35:31,508 INFO L125 PetriNetUnfolderBase]: For 13690/13690 co-relation queries the response was YES. [2024-06-14 12:35:31,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36704 conditions, 13144 events. 9541/13144 cut-off events. For 13690/13690 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 69718 event pairs, 4602 based on Foata normal form. 8/13120 useless extension candidates. Maximal degree in co-relation 36686. Up to 12846 conditions per place. [2024-06-14 12:35:31,562 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 73 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-06-14 12:35:31,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 95 transitions, 521 flow [2024-06-14 12:35:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:35:31,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:35:31,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-14 12:35:31,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288461538461539 [2024-06-14 12:35:31,564 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 227 flow. Second operand 6 states and 165 transitions. [2024-06-14 12:35:31,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 95 transitions, 521 flow [2024-06-14 12:35:31,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 95 transitions, 488 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 12:35:31,568 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 258 flow [2024-06-14 12:35:31,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-06-14 12:35:31,569 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-14 12:35:31,569 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 258 flow [2024-06-14 12:35:31,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:31,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:31,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:31,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:35:31,570 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:31,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:31,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1937332911, now seen corresponding path program 1 times [2024-06-14 12:35:31,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:31,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603836354] [2024-06-14 12:35:31,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:31,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:32,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:32,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603836354] [2024-06-14 12:35:32,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603836354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:32,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:32,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:35:32,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40646091] [2024-06-14 12:35:32,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:32,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:35:32,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:32,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:35:32,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:35:32,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-14 12:35:32,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 258 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:32,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:32,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-14 12:35:32,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:33,468 INFO L124 PetriNetUnfolderBase]: 8137/11568 cut-off events. [2024-06-14 12:35:33,468 INFO L125 PetriNetUnfolderBase]: For 18131/18131 co-relation queries the response was YES. [2024-06-14 12:35:33,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34441 conditions, 11568 events. 8137/11568 cut-off events. For 18131/18131 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 64134 event pairs, 4690 based on Foata normal form. 3/11569 useless extension candidates. Maximal degree in co-relation 34422. Up to 11079 conditions per place. [2024-06-14 12:35:33,523 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 60 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2024-06-14 12:35:33,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 77 transitions, 468 flow [2024-06-14 12:35:33,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:35:33,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:35:33,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-14 12:35:33,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-06-14 12:35:33,525 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 258 flow. Second operand 5 states and 122 transitions. [2024-06-14 12:35:33,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 77 transitions, 468 flow [2024-06-14 12:35:33,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 77 transitions, 422 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:33,530 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 277 flow [2024-06-14 12:35:33,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=277, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-06-14 12:35:33,531 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 8 predicate places. [2024-06-14 12:35:33,531 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 277 flow [2024-06-14 12:35:33,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:33,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:33,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:33,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:35:33,532 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:33,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:33,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1163821838, now seen corresponding path program 1 times [2024-06-14 12:35:33,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:33,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618897775] [2024-06-14 12:35:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:33,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:33,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:34,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:34,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618897775] [2024-06-14 12:35:34,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618897775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:34,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:34,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:35:34,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466938152] [2024-06-14 12:35:34,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:34,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:35:34,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:34,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:35:34,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:35:34,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:35:34,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 277 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:34,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:34,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:35:34,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:35,689 INFO L124 PetriNetUnfolderBase]: 9554/13192 cut-off events. [2024-06-14 12:35:35,689 INFO L125 PetriNetUnfolderBase]: For 30986/30986 co-relation queries the response was YES. [2024-06-14 12:35:35,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42732 conditions, 13192 events. 9554/13192 cut-off events. For 30986/30986 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 70087 event pairs, 5494 based on Foata normal form. 3/13193 useless extension candidates. Maximal degree in co-relation 42711. Up to 12933 conditions per place. [2024-06-14 12:35:35,757 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 71 selfloop transitions, 14 changer transitions 0/91 dead transitions. [2024-06-14 12:35:35,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 91 transitions, 549 flow [2024-06-14 12:35:35,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:35:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:35:35,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 12:35:35,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-14 12:35:35,759 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 277 flow. Second operand 6 states and 143 transitions. [2024-06-14 12:35:35,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 91 transitions, 549 flow [2024-06-14 12:35:35,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 516 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 12:35:35,764 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 323 flow [2024-06-14 12:35:35,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=323, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-14 12:35:35,765 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2024-06-14 12:35:35,765 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 323 flow [2024-06-14 12:35:35,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:35,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:35,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:35,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:35:35,766 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:35,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:35,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1169535758, now seen corresponding path program 2 times [2024-06-14 12:35:35,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:35,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947683271] [2024-06-14 12:35:35,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:35,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:36,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:36,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947683271] [2024-06-14 12:35:36,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947683271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:36,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:36,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:35:36,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502864629] [2024-06-14 12:35:36,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:36,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:35:36,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:36,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:35:36,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:35:36,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:35:36,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 323 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:36,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:36,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:35:36,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:38,019 INFO L124 PetriNetUnfolderBase]: 9545/13201 cut-off events. [2024-06-14 12:35:38,019 INFO L125 PetriNetUnfolderBase]: For 41920/41934 co-relation queries the response was YES. [2024-06-14 12:35:38,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46034 conditions, 13201 events. 9545/13201 cut-off events. For 41920/41934 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 70334 event pairs, 5476 based on Foata normal form. 15/13213 useless extension candidates. Maximal degree in co-relation 46012. Up to 12891 conditions per place. [2024-06-14 12:35:38,086 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 65 selfloop transitions, 21 changer transitions 0/92 dead transitions. [2024-06-14 12:35:38,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 597 flow [2024-06-14 12:35:38,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:35:38,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:35:38,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 12:35:38,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2024-06-14 12:35:38,087 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 323 flow. Second operand 6 states and 142 transitions. [2024-06-14 12:35:38,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 597 flow [2024-06-14 12:35:38,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 92 transitions, 550 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:38,094 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 377 flow [2024-06-14 12:35:38,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=377, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-14 12:35:38,095 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-14 12:35:38,095 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 377 flow [2024-06-14 12:35:38,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:38,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:38,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:38,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:35:38,096 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:38,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:38,096 INFO L85 PathProgramCache]: Analyzing trace with hash 2056123854, now seen corresponding path program 1 times [2024-06-14 12:35:38,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:38,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819633976] [2024-06-14 12:35:38,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:38,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:39,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:39,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:39,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819633976] [2024-06-14 12:35:39,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819633976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:39,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:39,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:35:39,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836044795] [2024-06-14 12:35:39,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:39,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:35:39,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:39,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:35:39,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:35:39,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:35:39,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 377 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:39,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:39,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:35:39,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:41,051 INFO L124 PetriNetUnfolderBase]: 9900/13961 cut-off events. [2024-06-14 12:35:41,051 INFO L125 PetriNetUnfolderBase]: For 54652/54652 co-relation queries the response was YES. [2024-06-14 12:35:41,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51107 conditions, 13961 events. 9900/13961 cut-off events. For 54652/54652 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 77090 event pairs, 5554 based on Foata normal form. 3/13962 useless extension candidates. Maximal degree in co-relation 51084. Up to 13410 conditions per place. [2024-06-14 12:35:41,141 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 83 selfloop transitions, 18 changer transitions 0/107 dead transitions. [2024-06-14 12:35:41,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 107 transitions, 720 flow [2024-06-14 12:35:41,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:35:41,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:35:41,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 12:35:41,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44505494505494503 [2024-06-14 12:35:41,143 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 377 flow. Second operand 7 states and 162 transitions. [2024-06-14 12:35:41,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 107 transitions, 720 flow [2024-06-14 12:35:41,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 107 transitions, 646 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:41,155 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 426 flow [2024-06-14 12:35:41,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=426, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2024-06-14 12:35:41,155 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 17 predicate places. [2024-06-14 12:35:41,156 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 426 flow [2024-06-14 12:35:41,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:41,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:41,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:41,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:35:41,156 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:41,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:41,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1718619564, now seen corresponding path program 1 times [2024-06-14 12:35:41,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:41,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797122523] [2024-06-14 12:35:41,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:41,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:42,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:42,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:42,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797122523] [2024-06-14 12:35:42,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797122523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:42,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:42,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:35:42,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669405129] [2024-06-14 12:35:42,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:42,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:35:42,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:42,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:35:42,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:35:42,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:35:42,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 426 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:42,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:42,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:35:42,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:43,792 INFO L124 PetriNetUnfolderBase]: 11376/15649 cut-off events. [2024-06-14 12:35:43,793 INFO L125 PetriNetUnfolderBase]: For 83502/83502 co-relation queries the response was YES. [2024-06-14 12:35:43,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62899 conditions, 15649 events. 11376/15649 cut-off events. For 83502/83502 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 84417 event pairs, 5611 based on Foata normal form. 6/15653 useless extension candidates. Maximal degree in co-relation 62874. Up to 15319 conditions per place. [2024-06-14 12:35:43,891 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 93 selfloop transitions, 22 changer transitions 0/122 dead transitions. [2024-06-14 12:35:43,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 122 transitions, 816 flow [2024-06-14 12:35:43,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:35:43,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:35:43,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 12:35:43,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-14 12:35:43,892 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 426 flow. Second operand 7 states and 170 transitions. [2024-06-14 12:35:43,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 122 transitions, 816 flow [2024-06-14 12:35:43,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 122 transitions, 755 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:43,907 INFO L231 Difference]: Finished difference. Result has 76 places, 84 transitions, 497 flow [2024-06-14 12:35:43,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=497, PETRI_PLACES=76, PETRI_TRANSITIONS=84} [2024-06-14 12:35:43,908 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-14 12:35:43,908 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 84 transitions, 497 flow [2024-06-14 12:35:43,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:43,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:43,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:43,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:35:43,909 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:43,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:43,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1889441964, now seen corresponding path program 2 times [2024-06-14 12:35:43,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:43,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799084680] [2024-06-14 12:35:43,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:43,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:44,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:44,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799084680] [2024-06-14 12:35:44,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799084680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:44,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:44,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:35:44,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909189133] [2024-06-14 12:35:44,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:44,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:35:44,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:44,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:35:44,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:35:44,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:35:44,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 84 transitions, 497 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:44,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:44,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:35:44,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:46,655 INFO L124 PetriNetUnfolderBase]: 11600/15945 cut-off events. [2024-06-14 12:35:46,656 INFO L125 PetriNetUnfolderBase]: For 109157/109157 co-relation queries the response was YES. [2024-06-14 12:35:46,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69621 conditions, 15945 events. 11600/15945 cut-off events. For 109157/109157 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 86006 event pairs, 5423 based on Foata normal form. 12/15955 useless extension candidates. Maximal degree in co-relation 69594. Up to 15434 conditions per place. [2024-06-14 12:35:46,782 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 95 selfloop transitions, 32 changer transitions 0/134 dead transitions. [2024-06-14 12:35:46,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 134 transitions, 1035 flow [2024-06-14 12:35:46,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:35:46,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:35:46,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 12:35:46,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-14 12:35:46,785 INFO L175 Difference]: Start difference. First operand has 76 places, 84 transitions, 497 flow. Second operand 7 states and 175 transitions. [2024-06-14 12:35:46,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 134 transitions, 1035 flow [2024-06-14 12:35:46,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 134 transitions, 971 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 12:35:46,807 INFO L231 Difference]: Finished difference. Result has 81 places, 94 transitions, 655 flow [2024-06-14 12:35:46,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=655, PETRI_PLACES=81, PETRI_TRANSITIONS=94} [2024-06-14 12:35:46,808 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 26 predicate places. [2024-06-14 12:35:46,808 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 94 transitions, 655 flow [2024-06-14 12:35:46,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:46,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:46,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:46,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:35:46,809 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:46,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:46,809 INFO L85 PathProgramCache]: Analyzing trace with hash -684915058, now seen corresponding path program 3 times [2024-06-14 12:35:46,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:46,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014891042] [2024-06-14 12:35:46,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:46,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:47,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:47,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014891042] [2024-06-14 12:35:47,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014891042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:47,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:47,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:35:47,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341142353] [2024-06-14 12:35:47,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:47,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:35:47,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:47,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:35:47,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:35:47,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:35:47,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 94 transitions, 655 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:47,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:47,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:35:47,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:49,519 INFO L124 PetriNetUnfolderBase]: 11638/16014 cut-off events. [2024-06-14 12:35:49,520 INFO L125 PetriNetUnfolderBase]: For 139330/139378 co-relation queries the response was YES. [2024-06-14 12:35:49,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75780 conditions, 16014 events. 11638/16014 cut-off events. For 139330/139378 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 86630 event pairs, 5132 based on Foata normal form. 30/16039 useless extension candidates. Maximal degree in co-relation 75751. Up to 15296 conditions per place. [2024-06-14 12:35:49,632 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 87 selfloop transitions, 51 changer transitions 0/145 dead transitions. [2024-06-14 12:35:49,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 145 transitions, 1305 flow [2024-06-14 12:35:49,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:35:49,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:35:49,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 12:35:49,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2024-06-14 12:35:49,634 INFO L175 Difference]: Start difference. First operand has 81 places, 94 transitions, 655 flow. Second operand 7 states and 180 transitions. [2024-06-14 12:35:49,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 145 transitions, 1305 flow [2024-06-14 12:35:49,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 145 transitions, 1237 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-14 12:35:49,672 INFO L231 Difference]: Finished difference. Result has 86 places, 104 transitions, 864 flow [2024-06-14 12:35:49,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=864, PETRI_PLACES=86, PETRI_TRANSITIONS=104} [2024-06-14 12:35:49,673 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-14 12:35:49,673 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 104 transitions, 864 flow [2024-06-14 12:35:49,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:49,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:49,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:49,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:35:49,674 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:49,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:49,674 INFO L85 PathProgramCache]: Analyzing trace with hash -684668794, now seen corresponding path program 1 times [2024-06-14 12:35:49,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:49,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771523077] [2024-06-14 12:35:49,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:49,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:50,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:50,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771523077] [2024-06-14 12:35:50,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771523077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:50,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:50,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:50,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477153694] [2024-06-14 12:35:50,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:50,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:50,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:50,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:50,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:50,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:35:50,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 104 transitions, 864 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:50,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:50,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:35:50,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:52,826 INFO L124 PetriNetUnfolderBase]: 10292/14423 cut-off events. [2024-06-14 12:35:52,826 INFO L125 PetriNetUnfolderBase]: For 140064/140064 co-relation queries the response was YES. [2024-06-14 12:35:52,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70998 conditions, 14423 events. 10292/14423 cut-off events. For 140064/140064 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 79125 event pairs, 4437 based on Foata normal form. 6/14427 useless extension candidates. Maximal degree in co-relation 70966. Up to 13917 conditions per place. [2024-06-14 12:35:52,947 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 119 selfloop transitions, 21 changer transitions 0/146 dead transitions. [2024-06-14 12:35:52,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 146 transitions, 1300 flow [2024-06-14 12:35:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:52,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:52,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-14 12:35:52,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-14 12:35:52,965 INFO L175 Difference]: Start difference. First operand has 86 places, 104 transitions, 864 flow. Second operand 8 states and 184 transitions. [2024-06-14 12:35:52,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 146 transitions, 1300 flow [2024-06-14 12:35:53,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 146 transitions, 1151 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:53,038 INFO L231 Difference]: Finished difference. Result has 90 places, 107 transitions, 829 flow [2024-06-14 12:35:53,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=719, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=829, PETRI_PLACES=90, PETRI_TRANSITIONS=107} [2024-06-14 12:35:53,038 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 35 predicate places. [2024-06-14 12:35:53,038 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 107 transitions, 829 flow [2024-06-14 12:35:53,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:53,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:53,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:53,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:35:53,039 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:53,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:53,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1344837816, now seen corresponding path program 1 times [2024-06-14 12:35:53,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:53,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930760377] [2024-06-14 12:35:53,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:53,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:53,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:53,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930760377] [2024-06-14 12:35:53,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930760377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:53,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:53,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:35:53,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378463786] [2024-06-14 12:35:53,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:53,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:35:53,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:53,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:35:53,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:35:54,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:35:54,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 107 transitions, 829 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:54,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:54,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:35:54,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:55,679 INFO L124 PetriNetUnfolderBase]: 10278/14661 cut-off events. [2024-06-14 12:35:55,679 INFO L125 PetriNetUnfolderBase]: For 144069/144069 co-relation queries the response was YES. [2024-06-14 12:35:55,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70646 conditions, 14661 events. 10278/14661 cut-off events. For 144069/144069 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 81833 event pairs, 4511 based on Foata normal form. 4/14663 useless extension candidates. Maximal degree in co-relation 70613. Up to 13956 conditions per place. [2024-06-14 12:35:55,795 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 110 selfloop transitions, 10 changer transitions 0/126 dead transitions. [2024-06-14 12:35:55,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 126 transitions, 1153 flow [2024-06-14 12:35:55,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:35:55,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:35:55,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-14 12:35:55,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-14 12:35:55,797 INFO L175 Difference]: Start difference. First operand has 90 places, 107 transitions, 829 flow. Second operand 5 states and 115 transitions. [2024-06-14 12:35:55,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 126 transitions, 1153 flow [2024-06-14 12:35:55,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 126 transitions, 1069 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 12:35:55,850 INFO L231 Difference]: Finished difference. Result has 89 places, 111 transitions, 828 flow [2024-06-14 12:35:55,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=828, PETRI_PLACES=89, PETRI_TRANSITIONS=111} [2024-06-14 12:35:55,851 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 34 predicate places. [2024-06-14 12:35:55,851 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 111 transitions, 828 flow [2024-06-14 12:35:55,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:55,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:55,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:55,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:35:55,852 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:55,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:55,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1737509677, now seen corresponding path program 1 times [2024-06-14 12:35:55,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:55,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258080698] [2024-06-14 12:35:55,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:55,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:57,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:57,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:57,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258080698] [2024-06-14 12:35:57,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258080698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:57,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:57,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:57,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850350386] [2024-06-14 12:35:57,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:57,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:57,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:57,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:57,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:57,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:35:57,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 111 transitions, 828 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:57,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:57,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:35:57,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:59,120 INFO L124 PetriNetUnfolderBase]: 11650/16041 cut-off events. [2024-06-14 12:35:59,121 INFO L125 PetriNetUnfolderBase]: For 197902/197934 co-relation queries the response was YES. [2024-06-14 12:35:59,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84634 conditions, 16041 events. 11650/16041 cut-off events. For 197902/197934 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 86815 event pairs, 4883 based on Foata normal form. 11/16050 useless extension candidates. Maximal degree in co-relation 84600. Up to 15679 conditions per place. [2024-06-14 12:35:59,257 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 121 selfloop transitions, 25 changer transitions 0/153 dead transitions. [2024-06-14 12:35:59,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 153 transitions, 1289 flow [2024-06-14 12:35:59,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:35:59,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:35:59,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 12:35:59,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-14 12:35:59,259 INFO L175 Difference]: Start difference. First operand has 89 places, 111 transitions, 828 flow. Second operand 7 states and 170 transitions. [2024-06-14 12:35:59,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 153 transitions, 1289 flow [2024-06-14 12:35:59,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 153 transitions, 1236 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 12:35:59,315 INFO L231 Difference]: Finished difference. Result has 93 places, 115 transitions, 918 flow [2024-06-14 12:35:59,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=918, PETRI_PLACES=93, PETRI_TRANSITIONS=115} [2024-06-14 12:35:59,316 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 38 predicate places. [2024-06-14 12:35:59,316 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 115 transitions, 918 flow [2024-06-14 12:35:59,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:59,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:59,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:59,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:35:59,317 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:59,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:59,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1741324909, now seen corresponding path program 1 times [2024-06-14 12:35:59,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:59,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515509456] [2024-06-14 12:35:59,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:59,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:00,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:00,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515509456] [2024-06-14 12:36:00,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515509456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:00,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:00,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:00,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835722555] [2024-06-14 12:36:00,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:00,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:00,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:00,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:00,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:00,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-14 12:36:00,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 115 transitions, 918 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:00,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:00,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-14 12:36:00,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:02,229 INFO L124 PetriNetUnfolderBase]: 11913/16329 cut-off events. [2024-06-14 12:36:02,229 INFO L125 PetriNetUnfolderBase]: For 209352/209352 co-relation queries the response was YES. [2024-06-14 12:36:02,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85171 conditions, 16329 events. 11913/16329 cut-off events. For 209352/209352 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 86151 event pairs, 4938 based on Foata normal form. 9/16336 useless extension candidates. Maximal degree in co-relation 85136. Up to 15784 conditions per place. [2024-06-14 12:36:02,367 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 122 selfloop transitions, 48 changer transitions 0/175 dead transitions. [2024-06-14 12:36:02,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 175 transitions, 1526 flow [2024-06-14 12:36:02,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:02,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:02,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 12:36:02,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-14 12:36:02,369 INFO L175 Difference]: Start difference. First operand has 93 places, 115 transitions, 918 flow. Second operand 8 states and 188 transitions. [2024-06-14 12:36:02,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 175 transitions, 1526 flow [2024-06-14 12:36:02,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 175 transitions, 1376 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:02,461 INFO L231 Difference]: Finished difference. Result has 97 places, 130 transitions, 1044 flow [2024-06-14 12:36:02,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1044, PETRI_PLACES=97, PETRI_TRANSITIONS=130} [2024-06-14 12:36:02,462 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2024-06-14 12:36:02,462 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 130 transitions, 1044 flow [2024-06-14 12:36:02,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:02,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:02,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:02,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:36:02,463 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:02,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:02,463 INFO L85 PathProgramCache]: Analyzing trace with hash 250095149, now seen corresponding path program 2 times [2024-06-14 12:36:02,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:02,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499807605] [2024-06-14 12:36:02,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:02,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:03,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:03,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499807605] [2024-06-14 12:36:03,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499807605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:03,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:03,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:03,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072693304] [2024-06-14 12:36:03,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:03,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:03,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:03,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:03,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:03,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-14 12:36:03,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 130 transitions, 1044 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:03,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:03,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-14 12:36:03,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:05,499 INFO L124 PetriNetUnfolderBase]: 11935/16366 cut-off events. [2024-06-14 12:36:05,500 INFO L125 PetriNetUnfolderBase]: For 228341/228357 co-relation queries the response was YES. [2024-06-14 12:36:05,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87370 conditions, 16366 events. 11935/16366 cut-off events. For 228341/228357 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 86422 event pairs, 4957 based on Foata normal form. 13/16374 useless extension candidates. Maximal degree in co-relation 87333. Up to 15575 conditions per place. [2024-06-14 12:36:05,652 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 105 selfloop transitions, 79 changer transitions 0/189 dead transitions. [2024-06-14 12:36:05,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 189 transitions, 1747 flow [2024-06-14 12:36:05,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:05,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:05,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 12:36:05,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-14 12:36:05,654 INFO L175 Difference]: Start difference. First operand has 97 places, 130 transitions, 1044 flow. Second operand 8 states and 192 transitions. [2024-06-14 12:36:05,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 189 transitions, 1747 flow [2024-06-14 12:36:05,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 189 transitions, 1672 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 12:36:05,760 INFO L231 Difference]: Finished difference. Result has 102 places, 143 transitions, 1287 flow [2024-06-14 12:36:05,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1287, PETRI_PLACES=102, PETRI_TRANSITIONS=143} [2024-06-14 12:36:05,760 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 47 predicate places. [2024-06-14 12:36:05,761 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 143 transitions, 1287 flow [2024-06-14 12:36:05,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:05,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:05,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:05,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:36:05,761 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:05,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:05,762 INFO L85 PathProgramCache]: Analyzing trace with hash 902282403, now seen corresponding path program 3 times [2024-06-14 12:36:05,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:05,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940050277] [2024-06-14 12:36:05,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:05,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:06,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:06,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940050277] [2024-06-14 12:36:06,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940050277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:06,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:06,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:06,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629018612] [2024-06-14 12:36:06,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:06,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:06,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:06,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:06,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:07,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-14 12:36:07,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 143 transitions, 1287 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:07,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:07,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-14 12:36:07,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:08,962 INFO L124 PetriNetUnfolderBase]: 12067/16546 cut-off events. [2024-06-14 12:36:08,962 INFO L125 PetriNetUnfolderBase]: For 250996/251012 co-relation queries the response was YES. [2024-06-14 12:36:09,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90899 conditions, 16546 events. 12067/16546 cut-off events. For 250996/251012 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 87316 event pairs, 4957 based on Foata normal form. 19/16560 useless extension candidates. Maximal degree in co-relation 90859. Up to 15837 conditions per place. [2024-06-14 12:36:09,095 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 121 selfloop transitions, 74 changer transitions 0/200 dead transitions. [2024-06-14 12:36:09,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 200 transitions, 1951 flow [2024-06-14 12:36:09,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:09,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:09,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 12:36:09,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567307692307692 [2024-06-14 12:36:09,097 INFO L175 Difference]: Start difference. First operand has 102 places, 143 transitions, 1287 flow. Second operand 8 states and 190 transitions. [2024-06-14 12:36:09,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 200 transitions, 1951 flow [2024-06-14 12:36:09,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 200 transitions, 1887 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-14 12:36:09,220 INFO L231 Difference]: Finished difference. Result has 108 places, 155 transitions, 1531 flow [2024-06-14 12:36:09,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1531, PETRI_PLACES=108, PETRI_TRANSITIONS=155} [2024-06-14 12:36:09,221 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2024-06-14 12:36:09,221 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 155 transitions, 1531 flow [2024-06-14 12:36:09,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:09,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:09,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:09,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:36:09,221 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:09,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:09,222 INFO L85 PathProgramCache]: Analyzing trace with hash 242476589, now seen corresponding path program 4 times [2024-06-14 12:36:09,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:09,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102507345] [2024-06-14 12:36:09,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:09,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:10,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:10,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102507345] [2024-06-14 12:36:10,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102507345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:10,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:10,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:10,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866963063] [2024-06-14 12:36:10,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:10,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:10,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:10,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:10,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:10,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-14 12:36:10,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 155 transitions, 1531 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:10,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:10,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-14 12:36:10,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:12,459 INFO L124 PetriNetUnfolderBase]: 12046/16512 cut-off events. [2024-06-14 12:36:12,459 INFO L125 PetriNetUnfolderBase]: For 266688/266704 co-relation queries the response was YES. [2024-06-14 12:36:12,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91239 conditions, 16512 events. 12046/16512 cut-off events. For 266688/266704 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 86991 event pairs, 4964 based on Foata normal form. 17/16526 useless extension candidates. Maximal degree in co-relation 91197. Up to 16167 conditions per place. [2024-06-14 12:36:12,604 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 157 selfloop transitions, 37 changer transitions 0/199 dead transitions. [2024-06-14 12:36:12,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 199 transitions, 2111 flow [2024-06-14 12:36:12,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:12,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:12,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-14 12:36:12,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43509615384615385 [2024-06-14 12:36:12,606 INFO L175 Difference]: Start difference. First operand has 108 places, 155 transitions, 1531 flow. Second operand 8 states and 181 transitions. [2024-06-14 12:36:12,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 199 transitions, 2111 flow [2024-06-14 12:36:12,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 199 transitions, 1920 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:12,792 INFO L231 Difference]: Finished difference. Result has 112 places, 160 transitions, 1528 flow [2024-06-14 12:36:12,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1528, PETRI_PLACES=112, PETRI_TRANSITIONS=160} [2024-06-14 12:36:12,792 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 57 predicate places. [2024-06-14 12:36:12,792 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 160 transitions, 1528 flow [2024-06-14 12:36:12,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:12,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:12,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:12,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:36:12,793 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:12,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:12,793 INFO L85 PathProgramCache]: Analyzing trace with hash -776089109, now seen corresponding path program 1 times [2024-06-14 12:36:12,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:12,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427484666] [2024-06-14 12:36:12,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:12,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:14,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:14,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427484666] [2024-06-14 12:36:14,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427484666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:14,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:14,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:14,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192459820] [2024-06-14 12:36:14,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:14,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:14,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:14,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:14,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:14,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:36:14,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 160 transitions, 1528 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:14,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:14,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:36:14,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:16,177 INFO L124 PetriNetUnfolderBase]: 11711/16236 cut-off events. [2024-06-14 12:36:16,178 INFO L125 PetriNetUnfolderBase]: For 292458/292466 co-relation queries the response was YES. [2024-06-14 12:36:16,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92562 conditions, 16236 events. 11711/16236 cut-off events. For 292458/292466 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 88482 event pairs, 4782 based on Foata normal form. 14/16248 useless extension candidates. Maximal degree in co-relation 92518. Up to 15728 conditions per place. [2024-06-14 12:36:16,631 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 186 selfloop transitions, 43 changer transitions 0/239 dead transitions. [2024-06-14 12:36:16,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 239 transitions, 2401 flow [2024-06-14 12:36:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:16,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:16,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-14 12:36:16,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636752136752137 [2024-06-14 12:36:16,633 INFO L175 Difference]: Start difference. First operand has 112 places, 160 transitions, 1528 flow. Second operand 9 states and 217 transitions. [2024-06-14 12:36:16,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 239 transitions, 2401 flow [2024-06-14 12:36:16,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 239 transitions, 2270 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:16,808 INFO L231 Difference]: Finished difference. Result has 119 places, 187 transitions, 1816 flow [2024-06-14 12:36:16,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1405, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1816, PETRI_PLACES=119, PETRI_TRANSITIONS=187} [2024-06-14 12:36:16,809 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2024-06-14 12:36:16,809 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 187 transitions, 1816 flow [2024-06-14 12:36:16,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:16,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:16,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:16,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:36:16,810 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:16,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:16,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1971834325, now seen corresponding path program 2 times [2024-06-14 12:36:16,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:16,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853265948] [2024-06-14 12:36:16,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:16,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:18,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:18,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853265948] [2024-06-14 12:36:18,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853265948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:18,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:18,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:18,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192705550] [2024-06-14 12:36:18,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:18,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:18,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:18,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:18,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:18,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:36:18,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 187 transitions, 1816 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:18,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:18,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:36:18,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:20,450 INFO L124 PetriNetUnfolderBase]: 11770/16339 cut-off events. [2024-06-14 12:36:20,451 INFO L125 PetriNetUnfolderBase]: For 330059/330083 co-relation queries the response was YES. [2024-06-14 12:36:20,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97006 conditions, 16339 events. 11770/16339 cut-off events. For 330059/330083 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 89026 event pairs, 3937 based on Foata normal form. 22/16344 useless extension candidates. Maximal degree in co-relation 96958. Up to 15720 conditions per place. [2024-06-14 12:36:20,598 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 180 selfloop transitions, 47 changer transitions 0/237 dead transitions. [2024-06-14 12:36:20,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 237 transitions, 2496 flow [2024-06-14 12:36:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:20,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:20,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 12:36:20,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45913461538461536 [2024-06-14 12:36:20,601 INFO L175 Difference]: Start difference. First operand has 119 places, 187 transitions, 1816 flow. Second operand 8 states and 191 transitions. [2024-06-14 12:36:20,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 237 transitions, 2496 flow [2024-06-14 12:36:20,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 237 transitions, 2394 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 12:36:20,853 INFO L231 Difference]: Finished difference. Result has 124 places, 190 transitions, 1900 flow [2024-06-14 12:36:20,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1714, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1900, PETRI_PLACES=124, PETRI_TRANSITIONS=190} [2024-06-14 12:36:20,853 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2024-06-14 12:36:20,853 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 190 transitions, 1900 flow [2024-06-14 12:36:20,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:20,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:20,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:20,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:36:20,854 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:20,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:20,854 INFO L85 PathProgramCache]: Analyzing trace with hash 424278825, now seen corresponding path program 3 times [2024-06-14 12:36:20,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:20,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923945184] [2024-06-14 12:36:20,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:20,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:22,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:22,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:22,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923945184] [2024-06-14 12:36:22,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923945184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:22,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:22,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:22,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477205507] [2024-06-14 12:36:22,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:22,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:22,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:22,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:22,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:22,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:36:22,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 190 transitions, 1900 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:22,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:22,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:36:22,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:24,531 INFO L124 PetriNetUnfolderBase]: 11834/16432 cut-off events. [2024-06-14 12:36:24,531 INFO L125 PetriNetUnfolderBase]: For 373757/373781 co-relation queries the response was YES. [2024-06-14 12:36:24,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100852 conditions, 16432 events. 11834/16432 cut-off events. For 373757/373781 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 89856 event pairs, 4464 based on Foata normal form. 28/16438 useless extension candidates. Maximal degree in co-relation 100803. Up to 15816 conditions per place. [2024-06-14 12:36:24,687 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 178 selfloop transitions, 52 changer transitions 0/240 dead transitions. [2024-06-14 12:36:24,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 240 transitions, 2594 flow [2024-06-14 12:36:24,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:24,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:24,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 12:36:24,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-14 12:36:24,690 INFO L175 Difference]: Start difference. First operand has 124 places, 190 transitions, 1900 flow. Second operand 8 states and 192 transitions. [2024-06-14 12:36:24,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 240 transitions, 2594 flow [2024-06-14 12:36:25,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 240 transitions, 2430 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-14 12:36:25,007 INFO L231 Difference]: Finished difference. Result has 126 places, 193 transitions, 1937 flow [2024-06-14 12:36:25,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1742, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1937, PETRI_PLACES=126, PETRI_TRANSITIONS=193} [2024-06-14 12:36:25,007 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2024-06-14 12:36:25,007 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 193 transitions, 1937 flow [2024-06-14 12:36:25,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:25,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:25,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:25,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:36:25,008 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:25,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:25,009 INFO L85 PathProgramCache]: Analyzing trace with hash 429047493, now seen corresponding path program 1 times [2024-06-14 12:36:25,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:25,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875072566] [2024-06-14 12:36:25,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:25,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:26,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:26,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875072566] [2024-06-14 12:36:26,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875072566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:26,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:26,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:26,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137145870] [2024-06-14 12:36:26,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:26,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:26,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:26,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:26,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:26,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-14 12:36:26,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 193 transitions, 1937 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:26,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:26,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-14 12:36:26,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:28,746 INFO L124 PetriNetUnfolderBase]: 12450/17098 cut-off events. [2024-06-14 12:36:28,747 INFO L125 PetriNetUnfolderBase]: For 371192/371208 co-relation queries the response was YES. [2024-06-14 12:36:28,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101451 conditions, 17098 events. 12450/17098 cut-off events. For 371192/371208 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 90416 event pairs, 4672 based on Foata normal form. 22/17113 useless extension candidates. Maximal degree in co-relation 101401. Up to 16775 conditions per place. [2024-06-14 12:36:28,905 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 218 selfloop transitions, 29 changer transitions 0/252 dead transitions. [2024-06-14 12:36:28,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 252 transitions, 2711 flow [2024-06-14 12:36:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:28,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:28,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-14 12:36:28,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42948717948717946 [2024-06-14 12:36:28,914 INFO L175 Difference]: Start difference. First operand has 126 places, 193 transitions, 1937 flow. Second operand 9 states and 201 transitions. [2024-06-14 12:36:28,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 252 transitions, 2711 flow [2024-06-14 12:36:29,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 252 transitions, 2548 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 12:36:29,222 INFO L231 Difference]: Finished difference. Result has 131 places, 201 transitions, 1979 flow [2024-06-14 12:36:29,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1979, PETRI_PLACES=131, PETRI_TRANSITIONS=201} [2024-06-14 12:36:29,223 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 76 predicate places. [2024-06-14 12:36:29,223 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 201 transitions, 1979 flow [2024-06-14 12:36:29,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:29,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:29,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:29,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:36:29,223 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:29,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:29,224 INFO L85 PathProgramCache]: Analyzing trace with hash 428862795, now seen corresponding path program 4 times [2024-06-14 12:36:29,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:29,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913463864] [2024-06-14 12:36:29,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:29,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:30,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:30,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913463864] [2024-06-14 12:36:30,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913463864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:30,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:30,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:30,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487113841] [2024-06-14 12:36:30,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:30,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:30,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:30,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:30,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:30,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:36:30,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 201 transitions, 1979 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:30,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:30,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:36:30,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:33,782 INFO L124 PetriNetUnfolderBase]: 12106/16851 cut-off events. [2024-06-14 12:36:33,782 INFO L125 PetriNetUnfolderBase]: For 430701/430721 co-relation queries the response was YES. [2024-06-14 12:36:33,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106049 conditions, 16851 events. 12106/16851 cut-off events. For 430701/430721 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 92599 event pairs, 4469 based on Foata normal form. 54/16888 useless extension candidates. Maximal degree in co-relation 105996. Up to 15858 conditions per place. [2024-06-14 12:36:33,949 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 167 selfloop transitions, 73 changer transitions 0/251 dead transitions. [2024-06-14 12:36:33,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 251 transitions, 2697 flow [2024-06-14 12:36:33,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:33,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:33,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 12:36:33,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47596153846153844 [2024-06-14 12:36:33,951 INFO L175 Difference]: Start difference. First operand has 131 places, 201 transitions, 1979 flow. Second operand 8 states and 198 transitions. [2024-06-14 12:36:33,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 251 transitions, 2697 flow [2024-06-14 12:36:34,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 251 transitions, 2586 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:34,493 INFO L231 Difference]: Finished difference. Result has 134 places, 204 transitions, 2115 flow [2024-06-14 12:36:34,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1868, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2115, PETRI_PLACES=134, PETRI_TRANSITIONS=204} [2024-06-14 12:36:34,494 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 79 predicate places. [2024-06-14 12:36:34,494 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 204 transitions, 2115 flow [2024-06-14 12:36:34,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:34,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:34,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:34,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:36:34,495 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:34,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:34,495 INFO L85 PathProgramCache]: Analyzing trace with hash -407393065, now seen corresponding path program 1 times [2024-06-14 12:36:34,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:34,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410605966] [2024-06-14 12:36:34,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:34,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:35,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:35,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410605966] [2024-06-14 12:36:35,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410605966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:35,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:35,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:36:35,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368488842] [2024-06-14 12:36:35,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:35,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:36:35,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:35,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:36:35,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:36:35,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-14 12:36:35,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 204 transitions, 2115 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:35,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:35,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-14 12:36:35,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:38,228 INFO L124 PetriNetUnfolderBase]: 12718/17491 cut-off events. [2024-06-14 12:36:38,229 INFO L125 PetriNetUnfolderBase]: For 460033/460049 co-relation queries the response was YES. [2024-06-14 12:36:38,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109964 conditions, 17491 events. 12718/17491 cut-off events. For 460033/460049 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 92842 event pairs, 4676 based on Foata normal form. 20/17508 useless extension candidates. Maximal degree in co-relation 109910. Up to 17178 conditions per place. [2024-06-14 12:36:38,360 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 213 selfloop transitions, 25 changer transitions 0/243 dead transitions. [2024-06-14 12:36:38,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 243 transitions, 2907 flow [2024-06-14 12:36:38,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:36:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:36:38,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 12:36:38,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-14 12:36:38,361 INFO L175 Difference]: Start difference. First operand has 134 places, 204 transitions, 2115 flow. Second operand 6 states and 141 transitions. [2024-06-14 12:36:38,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 243 transitions, 2907 flow [2024-06-14 12:36:38,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 243 transitions, 2710 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:36:38,747 INFO L231 Difference]: Finished difference. Result has 134 places, 212 transitions, 2114 flow [2024-06-14 12:36:38,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1918, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2114, PETRI_PLACES=134, PETRI_TRANSITIONS=212} [2024-06-14 12:36:38,748 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 79 predicate places. [2024-06-14 12:36:38,748 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 212 transitions, 2114 flow [2024-06-14 12:36:38,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:38,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:38,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:38,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:36:38,748 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:38,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:38,749 INFO L85 PathProgramCache]: Analyzing trace with hash 872651429, now seen corresponding path program 2 times [2024-06-14 12:36:38,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:38,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060788861] [2024-06-14 12:36:38,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:38,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:40,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:40,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060788861] [2024-06-14 12:36:40,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060788861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:40,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:40,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:40,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139316324] [2024-06-14 12:36:40,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:40,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:40,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:40,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:40,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:40,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-14 12:36:40,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 212 transitions, 2114 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:40,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:40,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-14 12:36:40,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:42,726 INFO L124 PetriNetUnfolderBase]: 12754/17555 cut-off events. [2024-06-14 12:36:42,726 INFO L125 PetriNetUnfolderBase]: For 489242/489275 co-relation queries the response was YES. [2024-06-14 12:36:42,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112656 conditions, 17555 events. 12754/17555 cut-off events. For 489242/489275 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 93206 event pairs, 4703 based on Foata normal form. 29/17574 useless extension candidates. Maximal degree in co-relation 112601. Up to 16522 conditions per place. [2024-06-14 12:36:43,004 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 144 selfloop transitions, 119 changer transitions 0/268 dead transitions. [2024-06-14 12:36:43,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 268 transitions, 3029 flow [2024-06-14 12:36:43,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:43,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:43,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-14 12:36:43,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2024-06-14 12:36:43,009 INFO L175 Difference]: Start difference. First operand has 134 places, 212 transitions, 2114 flow. Second operand 9 states and 213 transitions. [2024-06-14 12:36:43,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 268 transitions, 3029 flow [2024-06-14 12:36:43,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 268 transitions, 2959 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-14 12:36:43,386 INFO L231 Difference]: Finished difference. Result has 141 places, 215 transitions, 2382 flow [2024-06-14 12:36:43,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2044, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2382, PETRI_PLACES=141, PETRI_TRANSITIONS=215} [2024-06-14 12:36:43,386 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 86 predicate places. [2024-06-14 12:36:43,386 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 215 transitions, 2382 flow [2024-06-14 12:36:43,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:43,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:43,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:43,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:36:43,387 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:43,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:43,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1102636709, now seen corresponding path program 3 times [2024-06-14 12:36:43,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:43,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116698350] [2024-06-14 12:36:43,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:43,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:44,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:44,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116698350] [2024-06-14 12:36:44,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116698350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:44,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:44,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:44,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772021144] [2024-06-14 12:36:44,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:44,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:44,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:44,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:44,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:45,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-14 12:36:45,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 215 transitions, 2382 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:45,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:45,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-14 12:36:45,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:47,845 INFO L124 PetriNetUnfolderBase]: 12790/17600 cut-off events. [2024-06-14 12:36:47,845 INFO L125 PetriNetUnfolderBase]: For 537283/537321 co-relation queries the response was YES. [2024-06-14 12:36:47,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116789 conditions, 17600 events. 12790/17600 cut-off events. For 537283/537321 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 93408 event pairs, 4506 based on Foata normal form. 38/17634 useless extension candidates. Maximal degree in co-relation 116732. Up to 16989 conditions per place. [2024-06-14 12:36:48,010 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 200 selfloop transitions, 73 changer transitions 0/278 dead transitions. [2024-06-14 12:36:48,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 278 transitions, 3460 flow [2024-06-14 12:36:48,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:48,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:48,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-14 12:36:48,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44017094017094016 [2024-06-14 12:36:48,012 INFO L175 Difference]: Start difference. First operand has 141 places, 215 transitions, 2382 flow. Second operand 9 states and 206 transitions. [2024-06-14 12:36:48,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 278 transitions, 3460 flow [2024-06-14 12:36:48,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 278 transitions, 3142 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-14 12:36:48,425 INFO L231 Difference]: Finished difference. Result has 144 places, 225 transitions, 2477 flow [2024-06-14 12:36:48,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2070, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2477, PETRI_PLACES=144, PETRI_TRANSITIONS=225} [2024-06-14 12:36:48,425 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 89 predicate places. [2024-06-14 12:36:48,425 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 225 transitions, 2477 flow [2024-06-14 12:36:48,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:48,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:48,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:48,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:36:48,426 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:48,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:48,426 INFO L85 PathProgramCache]: Analyzing trace with hash -845258011, now seen corresponding path program 4 times [2024-06-14 12:36:48,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:48,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42048612] [2024-06-14 12:36:48,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:48,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:49,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:49,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42048612] [2024-06-14 12:36:49,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42048612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:49,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:49,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:49,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70331834] [2024-06-14 12:36:49,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:49,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:49,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:49,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:49,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:49,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-14 12:36:49,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 225 transitions, 2477 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:49,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:49,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-14 12:36:49,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:52,536 INFO L124 PetriNetUnfolderBase]: 12826/17652 cut-off events. [2024-06-14 12:36:52,536 INFO L125 PetriNetUnfolderBase]: For 584189/584227 co-relation queries the response was YES. [2024-06-14 12:36:52,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119708 conditions, 17652 events. 12826/17652 cut-off events. For 584189/584227 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 93834 event pairs, 4712 based on Foata normal form. 38/17686 useless extension candidates. Maximal degree in co-relation 119649. Up to 17246 conditions per place. [2024-06-14 12:36:52,813 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 225 selfloop transitions, 47 changer transitions 0/277 dead transitions. [2024-06-14 12:36:52,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 277 transitions, 3279 flow [2024-06-14 12:36:52,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:52,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:52,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-14 12:36:52,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42948717948717946 [2024-06-14 12:36:52,815 INFO L175 Difference]: Start difference. First operand has 144 places, 225 transitions, 2477 flow. Second operand 9 states and 201 transitions. [2024-06-14 12:36:52,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 277 transitions, 3279 flow [2024-06-14 12:36:53,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 277 transitions, 3157 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-14 12:36:53,252 INFO L231 Difference]: Finished difference. Result has 151 places, 228 transitions, 2561 flow [2024-06-14 12:36:53,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2367, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2561, PETRI_PLACES=151, PETRI_TRANSITIONS=228} [2024-06-14 12:36:53,253 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 96 predicate places. [2024-06-14 12:36:53,253 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 228 transitions, 2561 flow [2024-06-14 12:36:53,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:53,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:53,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:53,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:36:53,253 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:53,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:53,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1073343859, now seen corresponding path program 5 times [2024-06-14 12:36:53,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:53,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038665992] [2024-06-14 12:36:53,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:53,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:54,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:54,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038665992] [2024-06-14 12:36:54,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038665992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:54,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:54,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:54,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509486430] [2024-06-14 12:36:54,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:54,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:54,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:54,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:54,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:54,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:36:54,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 228 transitions, 2561 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:54,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:54,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:36:54,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:57,580 INFO L124 PetriNetUnfolderBase]: 12236/17041 cut-off events. [2024-06-14 12:36:57,580 INFO L125 PetriNetUnfolderBase]: For 618879/618920 co-relation queries the response was YES. [2024-06-14 12:36:57,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120004 conditions, 17041 events. 12236/17041 cut-off events. For 618879/618920 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 93799 event pairs, 4475 based on Foata normal form. 35/17051 useless extension candidates. Maximal degree in co-relation 119943. Up to 16204 conditions per place. [2024-06-14 12:36:57,742 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 171 selfloop transitions, 90 changer transitions 0/272 dead transitions. [2024-06-14 12:36:57,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 272 transitions, 3311 flow [2024-06-14 12:36:57,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:57,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:57,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 12:36:57,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45913461538461536 [2024-06-14 12:36:57,744 INFO L175 Difference]: Start difference. First operand has 151 places, 228 transitions, 2561 flow. Second operand 8 states and 191 transitions. [2024-06-14 12:36:57,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 272 transitions, 3311 flow [2024-06-14 12:36:58,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 272 transitions, 3118 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-14 12:36:58,246 INFO L231 Difference]: Finished difference. Result has 152 places, 231 transitions, 2664 flow [2024-06-14 12:36:58,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2368, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2664, PETRI_PLACES=152, PETRI_TRANSITIONS=231} [2024-06-14 12:36:58,246 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 97 predicate places. [2024-06-14 12:36:58,247 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 231 transitions, 2664 flow [2024-06-14 12:36:58,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:58,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:58,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:58,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:36:58,247 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:58,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:58,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1073338899, now seen corresponding path program 1 times [2024-06-14 12:36:58,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:58,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458463627] [2024-06-14 12:36:58,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:58,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat