./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix053.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix053.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/mix053.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix053.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:36:37,550 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:36:37,632 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:36:37,637 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:36:37,638 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:36:37,657 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:36:37,658 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:36:37,658 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:36:37,659 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:36:37,659 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:36:37,660 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:36:37,660 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:36:37,661 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:36:37,661 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:36:37,662 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:36:37,662 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:36:37,662 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:36:37,663 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:36:37,663 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:36:37,663 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:36:37,664 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:36:37,664 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:36:37,665 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:36:37,665 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:36:37,665 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:36:37,665 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:36:37,666 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:36:37,666 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:36:37,666 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:36:37,667 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:36:37,667 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:36:37,667 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:36:37,668 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:36:37,668 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:36:37,668 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:36:37,669 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:36:37,669 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:36:37,669 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:36:37,670 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:36:37,670 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:36:37,670 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:36:37,671 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:36:37,671 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:36:37,671 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:36:37,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:36:37,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:36:37,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:36:37,995 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:36:37,996 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:36:37,997 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix053.opt.i [2024-06-27 20:36:39,159 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:36:39,402 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:36:39,403 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix053.opt.i [2024-06-27 20:36:39,423 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc1b2a987/4a0b9c452f3f4696878e4e4e4613c53f/FLAG087a520df [2024-06-27 20:36:39,438 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc1b2a987/4a0b9c452f3f4696878e4e4e4613c53f [2024-06-27 20:36:39,440 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:36:39,442 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:36:39,442 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix053.opt.yml/witness.yml [2024-06-27 20:36:39,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:36:39,667 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:36:39,668 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:36:39,668 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:36:39,673 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:36:39,674 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:36:39" (1/2) ... [2024-06-27 20:36:39,675 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1665bd64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:36:39, skipping insertion in model container [2024-06-27 20:36:39,675 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:36:39" (1/2) ... [2024-06-27 20:36:39,677 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@69a92faf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:36:39, skipping insertion in model container [2024-06-27 20:36:39,677 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:36:39" (2/2) ... [2024-06-27 20:36:39,677 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1665bd64 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:36:39, skipping insertion in model container [2024-06-27 20:36:39,678 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:36:39" (2/2) ... [2024-06-27 20:36:39,678 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:36:39,797 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:36:39,799 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((! multithreaded || z$flush_delayed == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0) [2024-06-27 20:36:39,799 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ((((((((((((((((((((! multithreaded || z$flush_delayed == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0) [2024-06-27 20:36:39,799 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ((((((((((((((((((((! multithreaded || z$flush_delayed == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0) [2024-06-27 20:36:39,799 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] ((((((((((((((((((((! multithreaded || z$flush_delayed == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0) [2024-06-27 20:36:39,800 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:36:39,800 INFO L106 edCorrectnessWitness]: ghost_update [L845-L845] multithreaded = 1; [2024-06-27 20:36:39,848 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:36:40,256 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:36:40,265 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:36:40,454 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:36:40,488 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:36:40,489 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:36:40 WrapperNode [2024-06-27 20:36:40,489 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:36:40,490 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:36:40,490 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:36:40,490 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:36:40,497 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 27.06 08:36:40" (1/1) ... [2024-06-27 20:36:40,533 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 27.06 08:36:40" (1/1) ... [2024-06-27 20:36:40,563 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 137 [2024-06-27 20:36:40,563 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:36:40,564 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:36:40,564 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:36:40,564 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:36:40,593 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:36:40" (1/1) ... [2024-06-27 20:36:40,593 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:36:40" (1/1) ... [2024-06-27 20:36:40,597 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:36:40" (1/1) ... [2024-06-27 20:36:40,621 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]. [2024-06-27 20:36:40,625 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:36:40" (1/1) ... [2024-06-27 20:36:40,625 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:36:40" (1/1) ... [2024-06-27 20:36:40,672 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:36:40" (1/1) ... [2024-06-27 20:36:40,682 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:36:40" (1/1) ... [2024-06-27 20:36:40,685 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:36:40" (1/1) ... [2024-06-27 20:36:40,686 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:36:40" (1/1) ... [2024-06-27 20:36:40,689 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:36:40,700 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:36:40,701 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:36:40,701 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:36:40,702 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:36:40" (1/1) ... [2024-06-27 20:36:40,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:36:40,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:36:40,735 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) [2024-06-27 20:36:40,760 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 [2024-06-27 20:36:40,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:36:40,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:36:40,780 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:36:40,780 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:36:40,782 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:36:40,782 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:36:40,782 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:36:40,782 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:36:40,782 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 20:36:40,782 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 20:36:40,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:36:40,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:36:40,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:36:40,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:36:40,785 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:36:40,948 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:36:40,951 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:36:41,344 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:36:41,344 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:36:41,535 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:36:41,535 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:36:41,536 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:36:41 BoogieIcfgContainer [2024-06-27 20:36:41,536 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:36:41,539 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:36:41,539 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:36:41,542 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:36:41,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:36:39" (1/4) ... [2024-06-27 20:36:41,543 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561bb546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:36:41, skipping insertion in model container [2024-06-27 20:36:41,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:36:39" (2/4) ... [2024-06-27 20:36:41,544 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561bb546 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:36:41, skipping insertion in model container [2024-06-27 20:36:41,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:36:40" (3/4) ... [2024-06-27 20:36:41,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561bb546 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:36:41, skipping insertion in model container [2024-06-27 20:36:41,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:36:41" (4/4) ... [2024-06-27 20:36:41,546 INFO L112 eAbstractionObserver]: Analyzing ICFG mix053.opt.i [2024-06-27 20:36:41,562 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:36:41,563 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 20:36:41,563 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:36:41,616 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:36:41,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 118 flow [2024-06-27 20:36:41,725 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2024-06-27 20:36:41,725 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:36:41,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:36:41,727 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 118 flow [2024-06-27 20:36:41,731 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 41 transitions, 94 flow [2024-06-27 20:36:41,747 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:36:41,754 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;@54a23bf7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:36:41,754 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 20:36:41,758 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:36:41,759 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:36:41,759 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:36:41,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:41,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:36:41,760 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)] === [2024-06-27 20:36:41,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:41,766 INFO L85 PathProgramCache]: Analyzing trace with hash 372441680, now seen corresponding path program 1 times [2024-06-27 20:36:41,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:41,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402872119] [2024-06-27 20:36:41,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:41,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:41,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:42,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:42,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402872119] [2024-06-27 20:36:42,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402872119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:42,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:42,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:36:42,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712798115] [2024-06-27 20:36:42,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:42,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:36:42,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:42,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:36:42,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:36:43,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-27 20:36:43,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:43,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:43,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-27 20:36:43,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:44,357 INFO L124 PetriNetUnfolderBase]: 6742/9590 cut-off events. [2024-06-27 20:36:44,358 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2024-06-27 20:36:44,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19142 conditions, 9590 events. 6742/9590 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 52856 event pairs, 5078 based on Foata normal form. 1/9336 useless extension candidates. Maximal degree in co-relation 19129. Up to 9223 conditions per place. [2024-06-27 20:36:44,423 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 41 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-27 20:36:44,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 223 flow [2024-06-27 20:36:44,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:36:44,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:36:44,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-06-27 20:36:44,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6405228758169934 [2024-06-27 20:36:44,436 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 94 flow. Second operand 3 states and 98 transitions. [2024-06-27 20:36:44,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 223 flow [2024-06-27 20:36:44,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 216 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 20:36:44,442 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 129 flow [2024-06-27 20:36:44,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-27 20:36:44,447 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-06-27 20:36:44,447 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 129 flow [2024-06-27 20:36:44,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:44,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:44,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:44,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:36:44,448 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)] === [2024-06-27 20:36:44,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:44,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1435499765, now seen corresponding path program 1 times [2024-06-27 20:36:44,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:44,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324081363] [2024-06-27 20:36:44,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:44,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:45,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:45,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324081363] [2024-06-27 20:36:45,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324081363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:45,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:45,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:36:45,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771576433] [2024-06-27 20:36:45,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:45,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:36:45,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:45,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:36:45,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:36:45,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-06-27 20:36:45,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:45,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:45,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-06-27 20:36:45,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:46,440 INFO L124 PetriNetUnfolderBase]: 7882/10901 cut-off events. [2024-06-27 20:36:46,441 INFO L125 PetriNetUnfolderBase]: For 2113/2113 co-relation queries the response was YES. [2024-06-27 20:36:46,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24939 conditions, 10901 events. 7882/10901 cut-off events. For 2113/2113 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 58033 event pairs, 5323 based on Foata normal form. 4/10853 useless extension candidates. Maximal degree in co-relation 24927. Up to 10713 conditions per place. [2024-06-27 20:36:46,524 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 52 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-27 20:36:46,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 317 flow [2024-06-27 20:36:46,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:36:46,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:36:46,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-27 20:36:46,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6127450980392157 [2024-06-27 20:36:46,529 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 129 flow. Second operand 4 states and 125 transitions. [2024-06-27 20:36:46,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 317 flow [2024-06-27 20:36:46,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:36:46,534 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 177 flow [2024-06-27 20:36:46,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-27 20:36:46,535 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-06-27 20:36:46,536 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 177 flow [2024-06-27 20:36:46,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:46,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:46,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:46,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:36:46,540 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)] === [2024-06-27 20:36:46,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:46,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1550820863, now seen corresponding path program 1 times [2024-06-27 20:36:46,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:46,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854106665] [2024-06-27 20:36:46,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:46,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:47,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:47,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854106665] [2024-06-27 20:36:47,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854106665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:47,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:47,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:36:47,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277067687] [2024-06-27 20:36:47,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:47,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:36:47,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:47,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:36:47,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:36:47,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-06-27 20:36:47,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:47,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:47,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-06-27 20:36:47,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:48,764 INFO L124 PetriNetUnfolderBase]: 7900/10989 cut-off events. [2024-06-27 20:36:48,764 INFO L125 PetriNetUnfolderBase]: For 6160/6160 co-relation queries the response was YES. [2024-06-27 20:36:48,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28019 conditions, 10989 events. 7900/10989 cut-off events. For 6160/6160 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 59132 event pairs, 4142 based on Foata normal form. 7/10978 useless extension candidates. Maximal degree in co-relation 28005. Up to 10634 conditions per place. [2024-06-27 20:36:48,836 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 70 selfloop transitions, 21 changer transitions 0/99 dead transitions. [2024-06-27 20:36:48,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 99 transitions, 533 flow [2024-06-27 20:36:48,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:36:48,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:36:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-06-27 20:36:48,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6431372549019608 [2024-06-27 20:36:48,842 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 177 flow. Second operand 5 states and 164 transitions. [2024-06-27 20:36:48,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 99 transitions, 533 flow [2024-06-27 20:36:48,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 99 transitions, 514 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 20:36:48,850 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 308 flow [2024-06-27 20:36:48,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-06-27 20:36:48,851 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-27 20:36:48,851 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 308 flow [2024-06-27 20:36:48,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:48,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:48,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:48,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:36:48,852 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)] === [2024-06-27 20:36:48,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:48,853 INFO L85 PathProgramCache]: Analyzing trace with hash -9414076, now seen corresponding path program 1 times [2024-06-27 20:36:48,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:48,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338868816] [2024-06-27 20:36:48,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:48,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:48,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:49,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:49,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338868816] [2024-06-27 20:36:49,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338868816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:49,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:49,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:36:49,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15092236] [2024-06-27 20:36:49,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:49,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:36:49,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:49,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:36:49,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:36:49,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-06-27 20:36:49,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 308 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:49,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:49,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-06-27 20:36:49,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:51,012 INFO L124 PetriNetUnfolderBase]: 7929/11036 cut-off events. [2024-06-27 20:36:51,012 INFO L125 PetriNetUnfolderBase]: For 14683/14688 co-relation queries the response was YES. [2024-06-27 20:36:51,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32942 conditions, 11036 events. 7929/11036 cut-off events. For 14683/14688 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 59549 event pairs, 3337 based on Foata normal form. 18/11036 useless extension candidates. Maximal degree in co-relation 32925. Up to 10599 conditions per place. [2024-06-27 20:36:51,087 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 77 selfloop transitions, 25 changer transitions 0/110 dead transitions. [2024-06-27 20:36:51,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 110 transitions, 678 flow [2024-06-27 20:36:51,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:36:51,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:36:51,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-27 20:36:51,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6209150326797386 [2024-06-27 20:36:51,090 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 308 flow. Second operand 6 states and 190 transitions. [2024-06-27 20:36:51,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 110 transitions, 678 flow [2024-06-27 20:36:51,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 110 transitions, 666 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-27 20:36:51,101 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 385 flow [2024-06-27 20:36:51,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=385, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-06-27 20:36:51,103 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2024-06-27 20:36:51,103 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 385 flow [2024-06-27 20:36:51,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:51,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:51,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:51,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:36:51,104 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)] === [2024-06-27 20:36:51,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:51,105 INFO L85 PathProgramCache]: Analyzing trace with hash -586491835, now seen corresponding path program 1 times [2024-06-27 20:36:51,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:51,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928368951] [2024-06-27 20:36:51,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:51,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:51,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:51,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928368951] [2024-06-27 20:36:51,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928368951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:51,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:51,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:36:51,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935335508] [2024-06-27 20:36:51,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:51,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:36:51,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:51,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:36:51,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:36:51,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-27 20:36:51,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 385 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:51,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:51,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-27 20:36:51,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:53,100 INFO L124 PetriNetUnfolderBase]: 6770/9678 cut-off events. [2024-06-27 20:36:53,101 INFO L125 PetriNetUnfolderBase]: For 18698/18698 co-relation queries the response was YES. [2024-06-27 20:36:53,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31444 conditions, 9678 events. 6770/9678 cut-off events. For 18698/18698 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 53991 event pairs, 3368 based on Foata normal form. 3/9620 useless extension candidates. Maximal degree in co-relation 31423. Up to 9250 conditions per place. [2024-06-27 20:36:53,186 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 65 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2024-06-27 20:36:53,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 579 flow [2024-06-27 20:36:53,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:36:53,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:36:53,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-27 20:36:53,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2024-06-27 20:36:53,192 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 385 flow. Second operand 5 states and 130 transitions. [2024-06-27 20:36:53,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 579 flow [2024-06-27 20:36:53,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 510 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:36:53,206 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 347 flow [2024-06-27 20:36:53,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-27 20:36:53,211 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2024-06-27 20:36:53,211 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 347 flow [2024-06-27 20:36:53,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:53,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:53,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:53,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:36:53,212 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)] === [2024-06-27 20:36:53,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:53,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1007863547, now seen corresponding path program 1 times [2024-06-27 20:36:53,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:53,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226964236] [2024-06-27 20:36:53,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:53,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:53,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:54,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:54,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226964236] [2024-06-27 20:36:54,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226964236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:54,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:54,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:36:54,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913409740] [2024-06-27 20:36:54,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:54,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:36:54,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:54,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:36:54,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:36:54,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-27 20:36:54,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:54,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:54,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-27 20:36:54,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:55,249 INFO L124 PetriNetUnfolderBase]: 6803/9900 cut-off events. [2024-06-27 20:36:55,250 INFO L125 PetriNetUnfolderBase]: For 21782/21782 co-relation queries the response was YES. [2024-06-27 20:36:55,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32154 conditions, 9900 events. 6803/9900 cut-off events. For 21782/21782 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 56210 event pairs, 3202 based on Foata normal form. 7/9897 useless extension candidates. Maximal degree in co-relation 32131. Up to 9164 conditions per place. [2024-06-27 20:36:55,325 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 81 selfloop transitions, 22 changer transitions 0/111 dead transitions. [2024-06-27 20:36:55,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 111 transitions, 753 flow [2024-06-27 20:36:55,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:36:55,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:36:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-27 20:36:55,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5424836601307189 [2024-06-27 20:36:55,327 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 347 flow. Second operand 6 states and 166 transitions. [2024-06-27 20:36:55,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 111 transitions, 753 flow [2024-06-27 20:36:55,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 111 transitions, 724 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 20:36:55,341 INFO L231 Difference]: Finished difference. Result has 71 places, 80 transitions, 492 flow [2024-06-27 20:36:55,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=492, PETRI_PLACES=71, PETRI_TRANSITIONS=80} [2024-06-27 20:36:55,342 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2024-06-27 20:36:55,342 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 80 transitions, 492 flow [2024-06-27 20:36:55,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:55,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:55,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:55,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:36:55,343 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)] === [2024-06-27 20:36:55,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:55,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1184719806, now seen corresponding path program 1 times [2024-06-27 20:36:55,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:55,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150444288] [2024-06-27 20:36:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:55,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:56,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:56,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150444288] [2024-06-27 20:36:56,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150444288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:56,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:56,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:36:56,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813042362] [2024-06-27 20:36:56,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:56,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:36:56,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:56,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:36:56,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:36:56,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 20:36:56,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 80 transitions, 492 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:56,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:56,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 20:36:56,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:57,385 INFO L124 PetriNetUnfolderBase]: 7966/11091 cut-off events. [2024-06-27 20:36:57,386 INFO L125 PetriNetUnfolderBase]: For 39120/39130 co-relation queries the response was YES. [2024-06-27 20:36:57,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41355 conditions, 11091 events. 7966/11091 cut-off events. For 39120/39130 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 59496 event pairs, 3875 based on Foata normal form. 14/11093 useless extension candidates. Maximal degree in co-relation 41330. Up to 10721 conditions per place. [2024-06-27 20:36:57,467 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 82 selfloop transitions, 25 changer transitions 0/114 dead transitions. [2024-06-27 20:36:57,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 114 transitions, 849 flow [2024-06-27 20:36:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:36:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:36:57,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-27 20:36:57,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228758169934641 [2024-06-27 20:36:57,469 INFO L175 Difference]: Start difference. First operand has 71 places, 80 transitions, 492 flow. Second operand 6 states and 160 transitions. [2024-06-27 20:36:57,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 114 transitions, 849 flow [2024-06-27 20:36:57,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 114 transitions, 825 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-27 20:36:57,503 INFO L231 Difference]: Finished difference. Result has 76 places, 84 transitions, 564 flow [2024-06-27 20:36:57,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=564, PETRI_PLACES=76, PETRI_TRANSITIONS=84} [2024-06-27 20:36:57,505 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 22 predicate places. [2024-06-27 20:36:57,505 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 84 transitions, 564 flow [2024-06-27 20:36:57,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:57,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:57,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:57,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:36:57,506 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)] === [2024-06-27 20:36:57,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:57,507 INFO L85 PathProgramCache]: Analyzing trace with hash -977916636, now seen corresponding path program 2 times [2024-06-27 20:36:57,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:57,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742431516] [2024-06-27 20:36:57,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:57,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:58,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:58,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:58,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742431516] [2024-06-27 20:36:58,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742431516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:58,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:58,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:36:58,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28656784] [2024-06-27 20:36:58,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:58,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:36:58,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:58,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:36:58,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:36:58,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 20:36:58,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 84 transitions, 564 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:58,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:58,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 20:36:58,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:59,612 INFO L124 PetriNetUnfolderBase]: 7942/11043 cut-off events. [2024-06-27 20:36:59,613 INFO L125 PetriNetUnfolderBase]: For 43574/43574 co-relation queries the response was YES. [2024-06-27 20:36:59,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41698 conditions, 11043 events. 7942/11043 cut-off events. For 43574/43574 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 59047 event pairs, 3895 based on Foata normal form. 3/11029 useless extension candidates. Maximal degree in co-relation 41670. Up to 10691 conditions per place. [2024-06-27 20:36:59,693 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 75 selfloop transitions, 26 changer transitions 0/108 dead transitions. [2024-06-27 20:36:59,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 108 transitions, 828 flow [2024-06-27 20:36:59,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:36:59,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:36:59,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-27 20:36:59,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5065359477124183 [2024-06-27 20:36:59,695 INFO L175 Difference]: Start difference. First operand has 76 places, 84 transitions, 564 flow. Second operand 6 states and 155 transitions. [2024-06-27 20:36:59,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 108 transitions, 828 flow [2024-06-27 20:36:59,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 108 transitions, 785 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 20:36:59,738 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 584 flow [2024-06-27 20:36:59,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=521, 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=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=584, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-27 20:36:59,739 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 25 predicate places. [2024-06-27 20:36:59,740 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 584 flow [2024-06-27 20:36:59,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:59,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:59,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:59,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:36:59,740 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)] === [2024-06-27 20:36:59,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:59,741 INFO L85 PathProgramCache]: Analyzing trace with hash -161430010, now seen corresponding path program 1 times [2024-06-27 20:36:59,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:59,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715614476] [2024-06-27 20:36:59,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:59,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:00,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:00,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715614476] [2024-06-27 20:37:00,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715614476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:00,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:00,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:37:00,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977583440] [2024-06-27 20:37:00,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:00,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:37:00,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:00,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:37:00,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:37:00,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 20:37:00,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 584 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:00,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:00,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 20:37:00,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:01,945 INFO L124 PetriNetUnfolderBase]: 8752/12216 cut-off events. [2024-06-27 20:37:01,946 INFO L125 PetriNetUnfolderBase]: For 56130/56134 co-relation queries the response was YES. [2024-06-27 20:37:01,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47340 conditions, 12216 events. 8752/12216 cut-off events. For 56130/56134 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 65899 event pairs, 3183 based on Foata normal form. 15/12217 useless extension candidates. Maximal degree in co-relation 47311. Up to 10613 conditions per place. [2024-06-27 20:37:02,033 INFO L140 encePairwiseOnDemand]: 34/51 looper letters, 126 selfloop transitions, 59 changer transitions 0/192 dead transitions. [2024-06-27 20:37:02,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 192 transitions, 1678 flow [2024-06-27 20:37:02,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:02,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:02,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-27 20:37:02,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571078431372549 [2024-06-27 20:37:02,036 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 584 flow. Second operand 8 states and 233 transitions. [2024-06-27 20:37:02,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 192 transitions, 1678 flow [2024-06-27 20:37:02,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 192 transitions, 1515 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:37:02,095 INFO L231 Difference]: Finished difference. Result has 84 places, 120 transitions, 935 flow [2024-06-27 20:37:02,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=935, PETRI_PLACES=84, PETRI_TRANSITIONS=120} [2024-06-27 20:37:02,096 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 30 predicate places. [2024-06-27 20:37:02,097 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 120 transitions, 935 flow [2024-06-27 20:37:02,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:02,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:02,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:02,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:37:02,098 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)] === [2024-06-27 20:37:02,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:02,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1928392582, now seen corresponding path program 2 times [2024-06-27 20:37:02,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:02,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504223408] [2024-06-27 20:37:02,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:02,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:02,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:02,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:02,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504223408] [2024-06-27 20:37:02,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504223408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:02,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:02,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:37:02,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267767286] [2024-06-27 20:37:02,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:02,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:37:02,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:02,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:37:02,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:37:03,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 20:37:03,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 120 transitions, 935 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:03,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:03,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 20:37:03,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:04,750 INFO L124 PetriNetUnfolderBase]: 9368/13179 cut-off events. [2024-06-27 20:37:04,750 INFO L125 PetriNetUnfolderBase]: For 83908/83918 co-relation queries the response was YES. [2024-06-27 20:37:04,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58873 conditions, 13179 events. 9368/13179 cut-off events. For 83908/83918 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 72785 event pairs, 3460 based on Foata normal form. 31/13196 useless extension candidates. Maximal degree in co-relation 58840. Up to 11015 conditions per place. [2024-06-27 20:37:04,825 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 104 selfloop transitions, 81 changer transitions 0/192 dead transitions. [2024-06-27 20:37:04,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 192 transitions, 1817 flow [2024-06-27 20:37:04,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:37:04,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:37:04,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 20:37:04,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5602240896358543 [2024-06-27 20:37:04,827 INFO L175 Difference]: Start difference. First operand has 84 places, 120 transitions, 935 flow. Second operand 7 states and 200 transitions. [2024-06-27 20:37:04,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 192 transitions, 1817 flow [2024-06-27 20:37:04,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 192 transitions, 1723 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-27 20:37:04,898 INFO L231 Difference]: Finished difference. Result has 91 places, 141 transitions, 1308 flow [2024-06-27 20:37:04,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1308, PETRI_PLACES=91, PETRI_TRANSITIONS=141} [2024-06-27 20:37:04,899 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 37 predicate places. [2024-06-27 20:37:04,899 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 141 transitions, 1308 flow [2024-06-27 20:37:04,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:04,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:04,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:04,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:37:04,903 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)] === [2024-06-27 20:37:04,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:04,903 INFO L85 PathProgramCache]: Analyzing trace with hash -250406590, now seen corresponding path program 3 times [2024-06-27 20:37:04,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:04,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108817296] [2024-06-27 20:37:04,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:04,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:05,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:05,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108817296] [2024-06-27 20:37:05,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108817296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:05,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:05,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:37:05,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051503253] [2024-06-27 20:37:05,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:05,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:37:05,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:05,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:37:05,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:37:05,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 20:37:05,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 141 transitions, 1308 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:05,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:05,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 20:37:05,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:07,557 INFO L124 PetriNetUnfolderBase]: 9562/13465 cut-off events. [2024-06-27 20:37:07,557 INFO L125 PetriNetUnfolderBase]: For 111335/111353 co-relation queries the response was YES. [2024-06-27 20:37:07,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66379 conditions, 13465 events. 9562/13465 cut-off events. For 111335/111353 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 74515 event pairs, 3451 based on Foata normal form. 21/13456 useless extension candidates. Maximal degree in co-relation 66342. Up to 11127 conditions per place. [2024-06-27 20:37:07,647 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 101 selfloop transitions, 108 changer transitions 0/216 dead transitions. [2024-06-27 20:37:07,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 216 transitions, 2360 flow [2024-06-27 20:37:07,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:37:07,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:37:07,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-27 20:37:07,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574229691876751 [2024-06-27 20:37:07,649 INFO L175 Difference]: Start difference. First operand has 91 places, 141 transitions, 1308 flow. Second operand 7 states and 199 transitions. [2024-06-27 20:37:07,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 216 transitions, 2360 flow [2024-06-27 20:37:07,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 216 transitions, 2227 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 20:37:07,767 INFO L231 Difference]: Finished difference. Result has 97 places, 166 transitions, 1802 flow [2024-06-27 20:37:07,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1802, PETRI_PLACES=97, PETRI_TRANSITIONS=166} [2024-06-27 20:37:07,768 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 43 predicate places. [2024-06-27 20:37:07,768 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 166 transitions, 1802 flow [2024-06-27 20:37:07,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:07,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:07,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:07,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:37:07,768 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)] === [2024-06-27 20:37:07,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:07,769 INFO L85 PathProgramCache]: Analyzing trace with hash 2105524102, now seen corresponding path program 4 times [2024-06-27 20:37:07,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:07,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977050754] [2024-06-27 20:37:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:07,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:08,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:08,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977050754] [2024-06-27 20:37:08,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977050754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:08,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:08,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:37:08,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892870145] [2024-06-27 20:37:08,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:08,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:37:08,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:08,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:37:08,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:37:08,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 20:37:08,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 166 transitions, 1802 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:08,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:08,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 20:37:08,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:10,212 INFO L124 PetriNetUnfolderBase]: 9538/13436 cut-off events. [2024-06-27 20:37:10,212 INFO L125 PetriNetUnfolderBase]: For 139498/139510 co-relation queries the response was YES. [2024-06-27 20:37:10,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70798 conditions, 13436 events. 9538/13436 cut-off events. For 139498/139510 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 74300 event pairs, 3538 based on Foata normal form. 17/13424 useless extension candidates. Maximal degree in co-relation 70758. Up to 11120 conditions per place. [2024-06-27 20:37:10,322 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 107 selfloop transitions, 100 changer transitions 0/214 dead transitions. [2024-06-27 20:37:10,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 214 transitions, 2552 flow [2024-06-27 20:37:10,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:37:10,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:37:10,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-27 20:37:10,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5518207282913166 [2024-06-27 20:37:10,324 INFO L175 Difference]: Start difference. First operand has 97 places, 166 transitions, 1802 flow. Second operand 7 states and 197 transitions. [2024-06-27 20:37:10,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 214 transitions, 2552 flow [2024-06-27 20:37:10,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 214 transitions, 2458 flow, removed 46 selfloop flow, removed 1 redundant places. [2024-06-27 20:37:10,546 INFO L231 Difference]: Finished difference. Result has 103 places, 166 transitions, 1928 flow [2024-06-27 20:37:10,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1712, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1928, PETRI_PLACES=103, PETRI_TRANSITIONS=166} [2024-06-27 20:37:10,547 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2024-06-27 20:37:10,547 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 166 transitions, 1928 flow [2024-06-27 20:37:10,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:10,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:10,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:10,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:37:10,548 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:37:10,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:10,549 INFO L85 PathProgramCache]: Analyzing trace with hash 2105770180, now seen corresponding path program 1 times [2024-06-27 20:37:10,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:10,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646357918] [2024-06-27 20:37:10,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:10,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:11,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:11,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646357918] [2024-06-27 20:37:11,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646357918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:11,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:11,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:37:11,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768726511] [2024-06-27 20:37:11,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:11,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:37:11,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:11,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:37:11,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:37:11,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-27 20:37:11,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 166 transitions, 1928 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:11,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:11,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-27 20:37:11,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:13,190 INFO L124 PetriNetUnfolderBase]: 8534/12463 cut-off events. [2024-06-27 20:37:13,190 INFO L125 PetriNetUnfolderBase]: For 127378/127380 co-relation queries the response was YES. [2024-06-27 20:37:13,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64929 conditions, 12463 events. 8534/12463 cut-off events. For 127378/127380 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 72295 event pairs, 3099 based on Foata normal form. 26/12479 useless extension candidates. Maximal degree in co-relation 64886. Up to 11286 conditions per place. [2024-06-27 20:37:13,273 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 179 selfloop transitions, 25 changer transitions 0/212 dead transitions. [2024-06-27 20:37:13,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 212 transitions, 2602 flow [2024-06-27 20:37:13,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:37:13,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:37:13,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-27 20:37:13,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5462184873949579 [2024-06-27 20:37:13,276 INFO L175 Difference]: Start difference. First operand has 103 places, 166 transitions, 1928 flow. Second operand 7 states and 195 transitions. [2024-06-27 20:37:13,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 212 transitions, 2602 flow [2024-06-27 20:37:13,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 212 transitions, 2371 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:37:13,412 INFO L231 Difference]: Finished difference. Result has 104 places, 169 transitions, 1804 flow [2024-06-27 20:37:13,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1697, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1804, PETRI_PLACES=104, PETRI_TRANSITIONS=169} [2024-06-27 20:37:13,413 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 50 predicate places. [2024-06-27 20:37:13,413 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 169 transitions, 1804 flow [2024-06-27 20:37:13,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:13,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:13,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:13,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:37:13,414 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:37:13,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:13,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1721707586, now seen corresponding path program 1 times [2024-06-27 20:37:13,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:13,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17668206] [2024-06-27 20:37:13,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:13,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:13,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:13,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17668206] [2024-06-27 20:37:13,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17668206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:13,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:13,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:37:13,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904798511] [2024-06-27 20:37:13,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:13,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:37:13,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:13,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:37:13,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:37:14,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-27 20:37:14,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 169 transitions, 1804 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:14,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:14,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-27 20:37:14,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:15,530 INFO L124 PetriNetUnfolderBase]: 8520/12447 cut-off events. [2024-06-27 20:37:15,531 INFO L125 PetriNetUnfolderBase]: For 131390/131392 co-relation queries the response was YES. [2024-06-27 20:37:15,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64927 conditions, 12447 events. 8520/12447 cut-off events. For 131390/131392 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 72117 event pairs, 3221 based on Foata normal form. 4/12449 useless extension candidates. Maximal degree in co-relation 64884. Up to 11577 conditions per place. [2024-06-27 20:37:15,656 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 166 selfloop transitions, 10 changer transitions 0/184 dead transitions. [2024-06-27 20:37:15,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 184 transitions, 2202 flow [2024-06-27 20:37:15,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:37:15,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:37:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-27 20:37:15,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4980392156862745 [2024-06-27 20:37:15,658 INFO L175 Difference]: Start difference. First operand has 104 places, 169 transitions, 1804 flow. Second operand 5 states and 127 transitions. [2024-06-27 20:37:15,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 184 transitions, 2202 flow [2024-06-27 20:37:15,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 184 transitions, 2119 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 20:37:15,799 INFO L231 Difference]: Finished difference. Result has 104 places, 169 transitions, 1750 flow [2024-06-27 20:37:15,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1750, PETRI_PLACES=104, PETRI_TRANSITIONS=169} [2024-06-27 20:37:15,800 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 50 predicate places. [2024-06-27 20:37:15,800 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 169 transitions, 1750 flow [2024-06-27 20:37:15,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:15,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:15,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:15,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:37:15,801 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)] === [2024-06-27 20:37:15,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:15,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1955356944, now seen corresponding path program 1 times [2024-06-27 20:37:15,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:15,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103433867] [2024-06-27 20:37:15,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:15,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:16,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:16,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103433867] [2024-06-27 20:37:16,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103433867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:16,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:16,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:37:16,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863592831] [2024-06-27 20:37:16,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:16,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:37:16,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:16,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:37:16,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:37:16,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 20:37:16,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 169 transitions, 1750 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:16,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:16,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 20:37:16,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:18,589 INFO L124 PetriNetUnfolderBase]: 9798/13856 cut-off events. [2024-06-27 20:37:18,590 INFO L125 PetriNetUnfolderBase]: For 166205/166221 co-relation queries the response was YES. [2024-06-27 20:37:18,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73332 conditions, 13856 events. 9798/13856 cut-off events. For 166205/166221 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 77439 event pairs, 3598 based on Foata normal form. 27/13872 useless extension candidates. Maximal degree in co-relation 73288. Up to 11444 conditions per place. [2024-06-27 20:37:18,713 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 118 selfloop transitions, 112 changer transitions 0/237 dead transitions. [2024-06-27 20:37:18,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 237 transitions, 2804 flow [2024-06-27 20:37:18,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:37:18,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:37:18,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 20:37:18,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658263305322129 [2024-06-27 20:37:18,717 INFO L175 Difference]: Start difference. First operand has 104 places, 169 transitions, 1750 flow. Second operand 7 states and 202 transitions. [2024-06-27 20:37:18,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 237 transitions, 2804 flow [2024-06-27 20:37:18,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 237 transitions, 2771 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 20:37:18,877 INFO L231 Difference]: Finished difference. Result has 108 places, 185 transitions, 2213 flow [2024-06-27 20:37:18,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1717, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2213, PETRI_PLACES=108, PETRI_TRANSITIONS=185} [2024-06-27 20:37:18,878 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 54 predicate places. [2024-06-27 20:37:18,878 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 185 transitions, 2213 flow [2024-06-27 20:37:18,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:18,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:18,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:18,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:37:18,878 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)] === [2024-06-27 20:37:18,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:18,879 INFO L85 PathProgramCache]: Analyzing trace with hash -349371384, now seen corresponding path program 2 times [2024-06-27 20:37:18,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:18,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57826162] [2024-06-27 20:37:18,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:18,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:19,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:19,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57826162] [2024-06-27 20:37:19,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57826162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:19,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:19,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:37:19,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045420721] [2024-06-27 20:37:19,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:19,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:37:19,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:19,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:37:19,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:37:19,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 20:37:19,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 185 transitions, 2213 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:19,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:19,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 20:37:19,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:21,621 INFO L124 PetriNetUnfolderBase]: 9920/14066 cut-off events. [2024-06-27 20:37:21,621 INFO L125 PetriNetUnfolderBase]: For 197033/197063 co-relation queries the response was YES. [2024-06-27 20:37:21,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78866 conditions, 14066 events. 9920/14066 cut-off events. For 197033/197063 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 79251 event pairs, 3524 based on Foata normal form. 39/14094 useless extension candidates. Maximal degree in co-relation 78821. Up to 11556 conditions per place. [2024-06-27 20:37:21,752 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 117 selfloop transitions, 117 changer transitions 0/241 dead transitions. [2024-06-27 20:37:21,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 241 transitions, 3139 flow [2024-06-27 20:37:21,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:37:21,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:37:21,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-27 20:37:21,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2024-06-27 20:37:21,754 INFO L175 Difference]: Start difference. First operand has 108 places, 185 transitions, 2213 flow. Second operand 7 states and 196 transitions. [2024-06-27 20:37:21,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 241 transitions, 3139 flow [2024-06-27 20:37:21,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 241 transitions, 2982 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 20:37:21,991 INFO L231 Difference]: Finished difference. Result has 112 places, 194 transitions, 2450 flow [2024-06-27 20:37:21,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2064, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2450, PETRI_PLACES=112, PETRI_TRANSITIONS=194} [2024-06-27 20:37:21,992 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 58 predicate places. [2024-06-27 20:37:21,992 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 194 transitions, 2450 flow [2024-06-27 20:37:21,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:21,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:21,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:21,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:37:21,993 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)] === [2024-06-27 20:37:21,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:21,993 INFO L85 PathProgramCache]: Analyzing trace with hash 827331020, now seen corresponding path program 3 times [2024-06-27 20:37:21,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:21,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117632823] [2024-06-27 20:37:21,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:21,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:22,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:22,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117632823] [2024-06-27 20:37:22,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117632823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:22,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:22,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:37:22,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695878638] [2024-06-27 20:37:22,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:22,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:37:22,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:22,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:37:22,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:37:22,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 20:37:22,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 194 transitions, 2450 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:22,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:22,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 20:37:22,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:24,685 INFO L124 PetriNetUnfolderBase]: 9966/14121 cut-off events. [2024-06-27 20:37:24,686 INFO L125 PetriNetUnfolderBase]: For 223038/223134 co-relation queries the response was YES. [2024-06-27 20:37:24,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80933 conditions, 14121 events. 9966/14121 cut-off events. For 223038/223134 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 79545 event pairs, 3520 based on Foata normal form. 71/14131 useless extension candidates. Maximal degree in co-relation 80887. Up to 11604 conditions per place. [2024-06-27 20:37:24,797 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 113 selfloop transitions, 124 changer transitions 0/244 dead transitions. [2024-06-27 20:37:24,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 244 transitions, 3276 flow [2024-06-27 20:37:24,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:37:24,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:37:24,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-27 20:37:24,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5322128851540616 [2024-06-27 20:37:24,799 INFO L175 Difference]: Start difference. First operand has 112 places, 194 transitions, 2450 flow. Second operand 7 states and 190 transitions. [2024-06-27 20:37:24,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 244 transitions, 3276 flow [2024-06-27 20:37:25,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 244 transitions, 3070 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 20:37:25,105 INFO L231 Difference]: Finished difference. Result has 115 places, 203 transitions, 2660 flow [2024-06-27 20:37:25,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2252, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2660, PETRI_PLACES=115, PETRI_TRANSITIONS=203} [2024-06-27 20:37:25,106 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 61 predicate places. [2024-06-27 20:37:25,106 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 203 transitions, 2660 flow [2024-06-27 20:37:25,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:25,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:25,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:25,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:37:25,107 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)] === [2024-06-27 20:37:25,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:25,107 INFO L85 PathProgramCache]: Analyzing trace with hash 37077409, now seen corresponding path program 1 times [2024-06-27 20:37:25,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:25,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209757654] [2024-06-27 20:37:25,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:25,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:25,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:25,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:25,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209757654] [2024-06-27 20:37:25,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209757654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:25,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:25,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:37:25,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26409716] [2024-06-27 20:37:25,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:25,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:37:25,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:25,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:37:25,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:37:26,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 20:37:26,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 203 transitions, 2660 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:26,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:26,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 20:37:26,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:27,837 INFO L124 PetriNetUnfolderBase]: 10002/14184 cut-off events. [2024-06-27 20:37:27,837 INFO L125 PetriNetUnfolderBase]: For 245705/245741 co-relation queries the response was YES. [2024-06-27 20:37:27,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82706 conditions, 14184 events. 10002/14184 cut-off events. For 245705/245741 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 80102 event pairs, 2882 based on Foata normal form. 38/14219 useless extension candidates. Maximal degree in co-relation 82659. Up to 13166 conditions per place. [2024-06-27 20:37:27,969 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 201 selfloop transitions, 41 changer transitions 0/249 dead transitions. [2024-06-27 20:37:27,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 249 transitions, 3482 flow [2024-06-27 20:37:27,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:37:27,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:37:27,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 20:37:27,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5154061624649859 [2024-06-27 20:37:27,971 INFO L175 Difference]: Start difference. First operand has 115 places, 203 transitions, 2660 flow. Second operand 7 states and 184 transitions. [2024-06-27 20:37:27,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 249 transitions, 3482 flow [2024-06-27 20:37:28,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 249 transitions, 3270 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 20:37:28,304 INFO L231 Difference]: Finished difference. Result has 118 places, 209 transitions, 2658 flow [2024-06-27 20:37:28,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2448, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2658, PETRI_PLACES=118, PETRI_TRANSITIONS=209} [2024-06-27 20:37:28,305 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 64 predicate places. [2024-06-27 20:37:28,305 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 209 transitions, 2658 flow [2024-06-27 20:37:28,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:28,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:28,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:28,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:37:28,306 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)] === [2024-06-27 20:37:28,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:28,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1938920809, now seen corresponding path program 2 times [2024-06-27 20:37:28,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:28,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698598436] [2024-06-27 20:37:28,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:28,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:29,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:29,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698598436] [2024-06-27 20:37:29,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698598436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:29,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:29,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:37:29,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490086024] [2024-06-27 20:37:29,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:29,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:37:29,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:29,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:37:29,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:37:29,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 20:37:29,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 209 transitions, 2658 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:29,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:29,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 20:37:29,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:31,084 INFO L124 PetriNetUnfolderBase]: 9987/14142 cut-off events. [2024-06-27 20:37:31,084 INFO L125 PetriNetUnfolderBase]: For 267841/267861 co-relation queries the response was YES. [2024-06-27 20:37:31,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82983 conditions, 14142 events. 9987/14142 cut-off events. For 267841/267861 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 79330 event pairs, 3463 based on Foata normal form. 22/14157 useless extension candidates. Maximal degree in co-relation 82934. Up to 13281 conditions per place. [2024-06-27 20:37:31,195 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 200 selfloop transitions, 40 changer transitions 0/247 dead transitions. [2024-06-27 20:37:31,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 247 transitions, 3268 flow [2024-06-27 20:37:31,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:37:31,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:37:31,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 20:37:31,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070028011204482 [2024-06-27 20:37:31,196 INFO L175 Difference]: Start difference. First operand has 118 places, 209 transitions, 2658 flow. Second operand 7 states and 181 transitions. [2024-06-27 20:37:31,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 247 transitions, 3268 flow [2024-06-27 20:37:31,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 247 transitions, 3140 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-27 20:37:31,581 INFO L231 Difference]: Finished difference. Result has 122 places, 209 transitions, 2622 flow [2024-06-27 20:37:31,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2530, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2622, PETRI_PLACES=122, PETRI_TRANSITIONS=209} [2024-06-27 20:37:31,581 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 68 predicate places. [2024-06-27 20:37:31,581 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 209 transitions, 2622 flow [2024-06-27 20:37:31,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:31,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:31,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:31,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:37:31,582 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)] === [2024-06-27 20:37:31,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:31,583 INFO L85 PathProgramCache]: Analyzing trace with hash -518870003, now seen corresponding path program 1 times [2024-06-27 20:37:31,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:31,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581596794] [2024-06-27 20:37:31,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:31,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:32,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:32,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:32,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581596794] [2024-06-27 20:37:32,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581596794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:32,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:32,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:37:32,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004461488] [2024-06-27 20:37:32,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:32,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:37:32,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:32,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:37:32,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:37:32,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 20:37:32,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 209 transitions, 2622 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:32,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:32,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 20:37:32,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:34,646 INFO L124 PetriNetUnfolderBase]: 10795/15405 cut-off events. [2024-06-27 20:37:34,646 INFO L125 PetriNetUnfolderBase]: For 319850/319864 co-relation queries the response was YES. [2024-06-27 20:37:34,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89337 conditions, 15405 events. 10795/15405 cut-off events. For 319850/319864 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 89222 event pairs, 3407 based on Foata normal form. 127/15521 useless extension candidates. Maximal degree in co-relation 89286. Up to 11689 conditions per place. [2024-06-27 20:37:35,027 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 134 selfloop transitions, 132 changer transitions 0/273 dead transitions. [2024-06-27 20:37:35,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 273 transitions, 3638 flow [2024-06-27 20:37:35,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:35,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:35,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-27 20:37:35,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612745098039216 [2024-06-27 20:37:35,029 INFO L175 Difference]: Start difference. First operand has 122 places, 209 transitions, 2622 flow. Second operand 8 states and 229 transitions. [2024-06-27 20:37:35,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 273 transitions, 3638 flow [2024-06-27 20:37:35,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 273 transitions, 3546 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:37:35,340 INFO L231 Difference]: Finished difference. Result has 124 places, 212 transitions, 2878 flow [2024-06-27 20:37:35,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2530, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2878, PETRI_PLACES=124, PETRI_TRANSITIONS=212} [2024-06-27 20:37:35,341 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 70 predicate places. [2024-06-27 20:37:35,341 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 212 transitions, 2878 flow [2024-06-27 20:37:35,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:35,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:35,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:35,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:37:35,341 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:37:35,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:35,342 INFO L85 PathProgramCache]: Analyzing trace with hash 605115235, now seen corresponding path program 1 times [2024-06-27 20:37:35,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:35,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060822402] [2024-06-27 20:37:35,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:35,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:36,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:36,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060822402] [2024-06-27 20:37:36,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060822402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:36,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:36,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:37:36,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081693047] [2024-06-27 20:37:36,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:36,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:37:36,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:36,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:37:36,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:37:36,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 20:37:36,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 212 transitions, 2878 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:36,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:36,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 20:37:36,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:37,957 INFO L124 PetriNetUnfolderBase]: 10841/15405 cut-off events. [2024-06-27 20:37:37,957 INFO L125 PetriNetUnfolderBase]: For 334093/334103 co-relation queries the response was YES. [2024-06-27 20:37:38,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94030 conditions, 15405 events. 10841/15405 cut-off events. For 334093/334103 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 88184 event pairs, 3692 based on Foata normal form. 18/15418 useless extension candidates. Maximal degree in co-relation 93978. Up to 14681 conditions per place. [2024-06-27 20:37:38,123 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 215 selfloop transitions, 29 changer transitions 0/251 dead transitions. [2024-06-27 20:37:38,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 251 transitions, 3687 flow [2024-06-27 20:37:38,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:37:38,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:37:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-27 20:37:38,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2024-06-27 20:37:38,124 INFO L175 Difference]: Start difference. First operand has 124 places, 212 transitions, 2878 flow. Second operand 6 states and 156 transitions. [2024-06-27 20:37:38,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 251 transitions, 3687 flow [2024-06-27 20:37:38,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 251 transitions, 3377 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 20:37:38,757 INFO L231 Difference]: Finished difference. Result has 124 places, 219 transitions, 2773 flow [2024-06-27 20:37:38,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2580, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2773, PETRI_PLACES=124, PETRI_TRANSITIONS=219} [2024-06-27 20:37:38,757 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 70 predicate places. [2024-06-27 20:37:38,757 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 219 transitions, 2773 flow [2024-06-27 20:37:38,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:38,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:38,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:38,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:37:38,758 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)] === [2024-06-27 20:37:38,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:38,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1869705783, now seen corresponding path program 2 times [2024-06-27 20:37:38,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:38,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601578462] [2024-06-27 20:37:38,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:38,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:39,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:39,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601578462] [2024-06-27 20:37:39,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601578462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:39,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:39,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:37:39,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223391303] [2024-06-27 20:37:39,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:39,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:37:39,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:39,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:37:39,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:37:39,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 20:37:39,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 219 transitions, 2773 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:39,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:39,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 20:37:39,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:41,758 INFO L124 PetriNetUnfolderBase]: 11038/15730 cut-off events. [2024-06-27 20:37:41,758 INFO L125 PetriNetUnfolderBase]: For 347023/347045 co-relation queries the response was YES. [2024-06-27 20:37:41,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92949 conditions, 15730 events. 11038/15730 cut-off events. For 347023/347045 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 90911 event pairs, 3440 based on Foata normal form. 38/15728 useless extension candidates. Maximal degree in co-relation 92896. Up to 12932 conditions per place. [2024-06-27 20:37:41,936 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 124 selfloop transitions, 147 changer transitions 0/278 dead transitions. [2024-06-27 20:37:41,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 278 transitions, 3735 flow [2024-06-27 20:37:41,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:41,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:41,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-27 20:37:41,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5465686274509803 [2024-06-27 20:37:41,937 INFO L175 Difference]: Start difference. First operand has 124 places, 219 transitions, 2773 flow. Second operand 8 states and 223 transitions. [2024-06-27 20:37:41,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 278 transitions, 3735 flow [2024-06-27 20:37:42,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 278 transitions, 3407 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 20:37:42,518 INFO L231 Difference]: Finished difference. Result has 126 places, 222 transitions, 2824 flow [2024-06-27 20:37:42,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2445, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2824, PETRI_PLACES=126, PETRI_TRANSITIONS=222} [2024-06-27 20:37:42,519 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 72 predicate places. [2024-06-27 20:37:42,519 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 222 transitions, 2824 flow [2024-06-27 20:37:42,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:42,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:42,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:42,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:37:42,519 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)] === [2024-06-27 20:37:42,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:42,520 INFO L85 PathProgramCache]: Analyzing trace with hash 479095557, now seen corresponding path program 3 times [2024-06-27 20:37:42,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:42,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775901060] [2024-06-27 20:37:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:42,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:43,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:43,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775901060] [2024-06-27 20:37:43,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775901060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:43,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:43,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:37:43,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795235980] [2024-06-27 20:37:43,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:43,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:37:43,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:43,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:37:43,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:37:43,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 20:37:43,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 222 transitions, 2824 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:43,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:43,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 20:37:43,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:45,676 INFO L124 PetriNetUnfolderBase]: 11235/16010 cut-off events. [2024-06-27 20:37:45,677 INFO L125 PetriNetUnfolderBase]: For 374034/374050 co-relation queries the response was YES. [2024-06-27 20:37:45,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98207 conditions, 16010 events. 11235/16010 cut-off events. For 374034/374050 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 92747 event pairs, 3539 based on Foata normal form. 30/15999 useless extension candidates. Maximal degree in co-relation 98154. Up to 13203 conditions per place. [2024-06-27 20:37:45,851 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 136 selfloop transitions, 139 changer transitions 0/282 dead transitions. [2024-06-27 20:37:45,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 282 transitions, 3896 flow [2024-06-27 20:37:45,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:45,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:45,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-27 20:37:45,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2024-06-27 20:37:45,852 INFO L175 Difference]: Start difference. First operand has 126 places, 222 transitions, 2824 flow. Second operand 8 states and 224 transitions. [2024-06-27 20:37:45,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 282 transitions, 3896 flow [2024-06-27 20:37:46,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 282 transitions, 3553 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:37:46,474 INFO L231 Difference]: Finished difference. Result has 128 places, 225 transitions, 2850 flow [2024-06-27 20:37:46,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2481, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2850, PETRI_PLACES=128, PETRI_TRANSITIONS=225} [2024-06-27 20:37:46,475 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 74 predicate places. [2024-06-27 20:37:46,475 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 225 transitions, 2850 flow [2024-06-27 20:37:46,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:46,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:46,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:46,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:37:46,475 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:37:46,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:46,476 INFO L85 PathProgramCache]: Analyzing trace with hash 715567587, now seen corresponding path program 4 times [2024-06-27 20:37:46,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:46,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325394196] [2024-06-27 20:37:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:46,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:46,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:47,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:47,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325394196] [2024-06-27 20:37:47,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325394196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:47,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:47,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:37:47,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13327123] [2024-06-27 20:37:47,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:47,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:37:47,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:47,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:37:47,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:37:47,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 20:37:47,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 225 transitions, 2850 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:47,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:47,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 20:37:47,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:49,449 INFO L124 PetriNetUnfolderBase]: 11381/16226 cut-off events. [2024-06-27 20:37:49,450 INFO L125 PetriNetUnfolderBase]: For 404435/404459 co-relation queries the response was YES. [2024-06-27 20:37:49,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100586 conditions, 16226 events. 11381/16226 cut-off events. For 404435/404459 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 94313 event pairs, 3142 based on Foata normal form. 38/16223 useless extension candidates. Maximal degree in co-relation 100532. Up to 11653 conditions per place. [2024-06-27 20:37:49,616 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 124 selfloop transitions, 158 changer transitions 0/289 dead transitions. [2024-06-27 20:37:49,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 289 transitions, 3878 flow [2024-06-27 20:37:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:49,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:49,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-27 20:37:49,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5588235294117647 [2024-06-27 20:37:49,617 INFO L175 Difference]: Start difference. First operand has 128 places, 225 transitions, 2850 flow. Second operand 8 states and 228 transitions. [2024-06-27 20:37:49,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 289 transitions, 3878 flow [2024-06-27 20:37:50,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 289 transitions, 3545 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 20:37:50,221 INFO L231 Difference]: Finished difference. Result has 130 places, 228 transitions, 2927 flow [2024-06-27 20:37:50,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2517, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2927, PETRI_PLACES=130, PETRI_TRANSITIONS=228} [2024-06-27 20:37:50,222 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 76 predicate places. [2024-06-27 20:37:50,222 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 228 transitions, 2927 flow [2024-06-27 20:37:50,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:50,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:50,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:50,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:37:50,223 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:37:50,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:50,223 INFO L85 PathProgramCache]: Analyzing trace with hash 998630049, now seen corresponding path program 2 times [2024-06-27 20:37:50,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:50,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874402624] [2024-06-27 20:37:50,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:50,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:50,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:50,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874402624] [2024-06-27 20:37:50,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874402624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:50,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:50,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:37:50,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950174105] [2024-06-27 20:37:50,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:50,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:37:50,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:50,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:37:50,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:37:50,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 20:37:50,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 228 transitions, 2927 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:50,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:50,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 20:37:50,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:53,064 INFO L124 PetriNetUnfolderBase]: 11359/16208 cut-off events. [2024-06-27 20:37:53,064 INFO L125 PetriNetUnfolderBase]: For 421316/421344 co-relation queries the response was YES. [2024-06-27 20:37:53,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102316 conditions, 16208 events. 11359/16208 cut-off events. For 421316/421344 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 94510 event pairs, 3812 based on Foata normal form. 26/16228 useless extension candidates. Maximal degree in co-relation 102261. Up to 15438 conditions per place. [2024-06-27 20:37:53,223 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 216 selfloop transitions, 29 changer transitions 0/252 dead transitions. [2024-06-27 20:37:53,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 252 transitions, 3503 flow [2024-06-27 20:37:53,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:37:53,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:37:53,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 20:37:53,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2024-06-27 20:37:53,224 INFO L175 Difference]: Start difference. First operand has 130 places, 228 transitions, 2927 flow. Second operand 6 states and 147 transitions. [2024-06-27 20:37:53,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 252 transitions, 3503 flow [2024-06-27 20:37:53,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 252 transitions, 3099 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 20:37:53,749 INFO L231 Difference]: Finished difference. Result has 130 places, 228 transitions, 2593 flow [2024-06-27 20:37:53,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2523, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2593, PETRI_PLACES=130, PETRI_TRANSITIONS=228} [2024-06-27 20:37:53,749 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 76 predicate places. [2024-06-27 20:37:53,749 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 228 transitions, 2593 flow [2024-06-27 20:37:53,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:53,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:53,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:53,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:37:53,750 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:37:53,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:53,750 INFO L85 PathProgramCache]: Analyzing trace with hash 162646911, now seen corresponding path program 1 times [2024-06-27 20:37:53,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:53,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462512818] [2024-06-27 20:37:53,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:53,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:54,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:54,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462512818] [2024-06-27 20:37:54,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462512818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:54,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:54,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:37:54,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149830384] [2024-06-27 20:37:54,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:54,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:37:54,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:54,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:37:54,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:37:54,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-27 20:37:54,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 228 transitions, 2593 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:54,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:54,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-27 20:37:54,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:56,758 INFO L124 PetriNetUnfolderBase]: 10227/14957 cut-off events. [2024-06-27 20:37:56,758 INFO L125 PetriNetUnfolderBase]: For 364450/364452 co-relation queries the response was YES. [2024-06-27 20:37:56,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89705 conditions, 14957 events. 10227/14957 cut-off events. For 364450/364452 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 89776 event pairs, 3356 based on Foata normal form. 8/14956 useless extension candidates. Maximal degree in co-relation 89649. Up to 13898 conditions per place. [2024-06-27 20:37:56,925 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 225 selfloop transitions, 25 changer transitions 0/258 dead transitions. [2024-06-27 20:37:56,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 258 transitions, 3321 flow [2024-06-27 20:37:56,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:37:56,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:37:56,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-27 20:37:56,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228758169934641 [2024-06-27 20:37:56,926 INFO L175 Difference]: Start difference. First operand has 130 places, 228 transitions, 2593 flow. Second operand 6 states and 160 transitions. [2024-06-27 20:37:56,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 258 transitions, 3321 flow [2024-06-27 20:37:57,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 258 transitions, 3240 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 20:37:57,529 INFO L231 Difference]: Finished difference. Result has 131 places, 232 transitions, 2627 flow [2024-06-27 20:37:57,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2512, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2627, PETRI_PLACES=131, PETRI_TRANSITIONS=232} [2024-06-27 20:37:57,530 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 77 predicate places. [2024-06-27 20:37:57,530 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 232 transitions, 2627 flow [2024-06-27 20:37:57,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:57,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:57,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:57,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:37:57,531 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:37:57,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:57,531 INFO L85 PathProgramCache]: Analyzing trace with hash 998636001, now seen corresponding path program 2 times [2024-06-27 20:37:57,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:57,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702020726] [2024-06-27 20:37:57,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:57,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:58,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:58,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702020726] [2024-06-27 20:37:58,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702020726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:58,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:58,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:37:58,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914751155] [2024-06-27 20:37:58,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:58,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:37:58,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:58,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:37:58,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:37:58,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-27 20:37:58,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 232 transitions, 2627 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:58,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:58,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-27 20:37:58,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:00,100 INFO L124 PetriNetUnfolderBase]: 10075/14685 cut-off events. [2024-06-27 20:38:00,100 INFO L125 PetriNetUnfolderBase]: For 378883/378889 co-relation queries the response was YES. [2024-06-27 20:38:00,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89355 conditions, 14685 events. 10075/14685 cut-off events. For 378883/378889 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 87209 event pairs, 3276 based on Foata normal form. 5/14681 useless extension candidates. Maximal degree in co-relation 89298. Up to 13682 conditions per place. [2024-06-27 20:38:00,250 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 219 selfloop transitions, 26 changer transitions 0/253 dead transitions. [2024-06-27 20:38:00,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 253 transitions, 3179 flow [2024-06-27 20:38:00,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:38:00,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:38:00,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-27 20:38:00,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2024-06-27 20:38:00,251 INFO L175 Difference]: Start difference. First operand has 131 places, 232 transitions, 2627 flow. Second operand 6 states and 156 transitions. [2024-06-27 20:38:00,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 253 transitions, 3179 flow [2024-06-27 20:38:00,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 253 transitions, 3124 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 20:38:00,802 INFO L231 Difference]: Finished difference. Result has 134 places, 232 transitions, 2633 flow [2024-06-27 20:38:00,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2572, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2633, PETRI_PLACES=134, PETRI_TRANSITIONS=232} [2024-06-27 20:38:00,802 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 80 predicate places. [2024-06-27 20:38:00,802 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 232 transitions, 2633 flow [2024-06-27 20:38:00,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:00,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:00,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:00,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:38:00,803 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)] === [2024-06-27 20:38:00,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:00,804 INFO L85 PathProgramCache]: Analyzing trace with hash -111561921, now seen corresponding path program 1 times [2024-06-27 20:38:00,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:00,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212373212] [2024-06-27 20:38:00,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:00,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:38:01,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:01,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212373212] [2024-06-27 20:38:01,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212373212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:01,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:01,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:38:01,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443812896] [2024-06-27 20:38:01,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:01,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:38:01,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:01,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:38:01,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:38:01,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 20:38:01,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 232 transitions, 2633 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:01,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:01,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 20:38:01,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:04,176 INFO L124 PetriNetUnfolderBase]: 13480/19548 cut-off events. [2024-06-27 20:38:04,176 INFO L125 PetriNetUnfolderBase]: For 616772/616778 co-relation queries the response was YES. [2024-06-27 20:38:04,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122623 conditions, 19548 events. 13480/19548 cut-off events. For 616772/616778 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 121717 event pairs, 3452 based on Foata normal form. 91/19626 useless extension candidates. Maximal degree in co-relation 122565. Up to 10646 conditions per place. [2024-06-27 20:38:04,400 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 174 selfloop transitions, 132 changer transitions 0/313 dead transitions. [2024-06-27 20:38:04,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 313 transitions, 4093 flow [2024-06-27 20:38:04,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:38:04,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:38:04,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-27 20:38:04,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 20:38:04,402 INFO L175 Difference]: Start difference. First operand has 134 places, 232 transitions, 2633 flow. Second operand 8 states and 238 transitions. [2024-06-27 20:38:04,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 313 transitions, 4093 flow [2024-06-27 20:38:05,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 313 transitions, 4001 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 20:38:05,180 INFO L231 Difference]: Finished difference. Result has 137 places, 240 transitions, 3095 flow [2024-06-27 20:38:05,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2541, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3095, PETRI_PLACES=137, PETRI_TRANSITIONS=240} [2024-06-27 20:38:05,181 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 83 predicate places. [2024-06-27 20:38:05,181 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 240 transitions, 3095 flow [2024-06-27 20:38:05,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:05,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:05,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:05,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:38:05,182 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)] === [2024-06-27 20:38:05,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:05,182 INFO L85 PathProgramCache]: Analyzing trace with hash -22996161, now seen corresponding path program 2 times [2024-06-27 20:38:05,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:05,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458935434] [2024-06-27 20:38:05,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:05,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:38:06,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:06,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458935434] [2024-06-27 20:38:06,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458935434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:06,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:06,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:38:06,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860169139] [2024-06-27 20:38:06,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:06,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:38:06,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:06,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:38:06,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:38:06,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 20:38:06,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 240 transitions, 3095 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:06,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:06,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 20:38:06,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:09,756 INFO L124 PetriNetUnfolderBase]: 15028/21971 cut-off events. [2024-06-27 20:38:09,756 INFO L125 PetriNetUnfolderBase]: For 766571/766577 co-relation queries the response was YES. [2024-06-27 20:38:09,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145313 conditions, 21971 events. 15028/21971 cut-off events. For 766571/766577 co-relation queries the response was YES. Maximal size of possible extension queue 941. Compared 142123 event pairs, 4836 based on Foata normal form. 91/22048 useless extension candidates. Maximal degree in co-relation 145253. Up to 15581 conditions per place. [2024-06-27 20:38:09,949 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 162 selfloop transitions, 142 changer transitions 0/311 dead transitions. [2024-06-27 20:38:09,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 311 transitions, 4409 flow [2024-06-27 20:38:09,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:38:09,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:38:09,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-27 20:38:09,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571078431372549 [2024-06-27 20:38:09,951 INFO L175 Difference]: Start difference. First operand has 137 places, 240 transitions, 3095 flow. Second operand 8 states and 233 transitions. [2024-06-27 20:38:09,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 311 transitions, 4409 flow [2024-06-27 20:38:11,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 311 transitions, 4200 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-27 20:38:11,394 INFO L231 Difference]: Finished difference. Result has 143 places, 246 transitions, 3380 flow [2024-06-27 20:38:11,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2886, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3380, PETRI_PLACES=143, PETRI_TRANSITIONS=246} [2024-06-27 20:38:11,395 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 89 predicate places. [2024-06-27 20:38:11,395 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 246 transitions, 3380 flow [2024-06-27 20:38:11,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:11,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:11,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:11,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:38:11,396 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:38:11,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:11,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1917358073, now seen corresponding path program 1 times [2024-06-27 20:38:11,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:11,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225327483] [2024-06-27 20:38:11,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:11,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:38:12,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:12,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225327483] [2024-06-27 20:38:12,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225327483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:12,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:12,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:38:12,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101683860] [2024-06-27 20:38:12,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:12,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:38:12,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:12,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:38:12,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:38:12,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 20:38:12,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 246 transitions, 3380 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:12,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:12,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 20:38:12,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:15,973 INFO L124 PetriNetUnfolderBase]: 15220/22351 cut-off events. [2024-06-27 20:38:15,973 INFO L125 PetriNetUnfolderBase]: For 803066/803088 co-relation queries the response was YES. [2024-06-27 20:38:16,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151241 conditions, 22351 events. 15220/22351 cut-off events. For 803066/803088 co-relation queries the response was YES. Maximal size of possible extension queue 947. Compared 145801 event pairs, 5125 based on Foata normal form. 43/22380 useless extension candidates. Maximal degree in co-relation 151178. Up to 19055 conditions per place. [2024-06-27 20:38:16,201 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 146 selfloop transitions, 148 changer transitions 0/301 dead transitions. [2024-06-27 20:38:16,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 301 transitions, 4534 flow [2024-06-27 20:38:16,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:38:16,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:38:16,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-27 20:38:16,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2024-06-27 20:38:16,202 INFO L175 Difference]: Start difference. First operand has 143 places, 246 transitions, 3380 flow. Second operand 7 states and 196 transitions. [2024-06-27 20:38:16,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 301 transitions, 4534 flow [2024-06-27 20:38:17,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 301 transitions, 4158 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-27 20:38:17,619 INFO L231 Difference]: Finished difference. Result has 145 places, 257 transitions, 3515 flow [2024-06-27 20:38:17,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3024, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3515, PETRI_PLACES=145, PETRI_TRANSITIONS=257} [2024-06-27 20:38:17,620 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 91 predicate places. [2024-06-27 20:38:17,620 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 257 transitions, 3515 flow [2024-06-27 20:38:17,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:17,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:17,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:17,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:38:17,621 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:38:17,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:17,622 INFO L85 PathProgramCache]: Analyzing trace with hash -743937187, now seen corresponding path program 3 times [2024-06-27 20:38:17,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:17,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209177599] [2024-06-27 20:38:17,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:17,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:38:18,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:18,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209177599] [2024-06-27 20:38:18,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209177599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:18,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:18,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:38:18,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276019781] [2024-06-27 20:38:18,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:18,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:38:18,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:18,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:38:18,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:38:18,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 20:38:18,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 257 transitions, 3515 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:18,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:18,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 20:38:18,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:22,691 INFO L124 PetriNetUnfolderBase]: 16535/24432 cut-off events. [2024-06-27 20:38:22,691 INFO L125 PetriNetUnfolderBase]: For 909993/910015 co-relation queries the response was YES. [2024-06-27 20:38:22,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163412 conditions, 24432 events. 16535/24432 cut-off events. For 909993/910015 co-relation queries the response was YES. Maximal size of possible extension queue 1061. Compared 163378 event pairs, 4821 based on Foata normal form. 97/24515 useless extension candidates. Maximal degree in co-relation 163348. Up to 18361 conditions per place. [2024-06-27 20:38:22,932 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 174 selfloop transitions, 151 changer transitions 0/332 dead transitions. [2024-06-27 20:38:22,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 332 transitions, 4973 flow [2024-06-27 20:38:22,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:38:22,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:38:22,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-27 20:38:22,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5784313725490197 [2024-06-27 20:38:22,934 INFO L175 Difference]: Start difference. First operand has 145 places, 257 transitions, 3515 flow. Second operand 8 states and 236 transitions. [2024-06-27 20:38:22,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 332 transitions, 4973 flow [2024-06-27 20:38:24,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 332 transitions, 4710 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 20:38:24,038 INFO L231 Difference]: Finished difference. Result has 150 places, 262 transitions, 3747 flow [2024-06-27 20:38:24,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3252, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3747, PETRI_PLACES=150, PETRI_TRANSITIONS=262} [2024-06-27 20:38:24,038 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 96 predicate places. [2024-06-27 20:38:24,038 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 262 transitions, 3747 flow [2024-06-27 20:38:24,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:24,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:24,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:24,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:38:24,039 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:38:24,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:24,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1089178077, now seen corresponding path program 4 times [2024-06-27 20:38:24,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:24,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879742725] [2024-06-27 20:38:24,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:24,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:38:24,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:24,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879742725] [2024-06-27 20:38:24,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879742725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:24,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:24,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:38:24,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605234387] [2024-06-27 20:38:24,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:24,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:38:24,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:24,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:38:24,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:38:25,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 20:38:25,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 262 transitions, 3747 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:25,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:25,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 20:38:25,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:29,511 INFO L124 PetriNetUnfolderBase]: 17146/25367 cut-off events. [2024-06-27 20:38:29,511 INFO L125 PetriNetUnfolderBase]: For 1004603/1004625 co-relation queries the response was YES. [2024-06-27 20:38:29,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172377 conditions, 25367 events. 17146/25367 cut-off events. For 1004603/1004625 co-relation queries the response was YES. Maximal size of possible extension queue 1116. Compared 171216 event pairs, 5895 based on Foata normal form. 111/25464 useless extension candidates. Maximal degree in co-relation 172311. Up to 21044 conditions per place. [2024-06-27 20:38:29,762 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 170 selfloop transitions, 149 changer transitions 0/326 dead transitions. [2024-06-27 20:38:29,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 326 transitions, 4915 flow [2024-06-27 20:38:29,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:38:29,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:38:29,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-27 20:38:29,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5588235294117647 [2024-06-27 20:38:29,764 INFO L175 Difference]: Start difference. First operand has 150 places, 262 transitions, 3747 flow. Second operand 8 states and 228 transitions. [2024-06-27 20:38:29,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 326 transitions, 4915 flow [2024-06-27 20:38:31,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 326 transitions, 4674 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 20:38:31,231 INFO L231 Difference]: Finished difference. Result has 154 places, 264 transitions, 3900 flow [2024-06-27 20:38:31,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3508, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3900, PETRI_PLACES=154, PETRI_TRANSITIONS=264} [2024-06-27 20:38:31,232 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 100 predicate places. [2024-06-27 20:38:31,232 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 264 transitions, 3900 flow [2024-06-27 20:38:31,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:31,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:31,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:31,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:38:31,233 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:38:31,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:31,233 INFO L85 PathProgramCache]: Analyzing trace with hash -583613271, now seen corresponding path program 5 times [2024-06-27 20:38:31,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:31,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308214923] [2024-06-27 20:38:31,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:31,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:38:32,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:32,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308214923] [2024-06-27 20:38:32,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308214923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:32,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:32,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:38:32,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906904144] [2024-06-27 20:38:32,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:32,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:38:32,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:32,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:38:32,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:38:32,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 20:38:32,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 264 transitions, 3900 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:32,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:32,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 20:38:32,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand