./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix051_tso.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix051_tso.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix051_tso.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix051_tso.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 21:14:30,301 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:14:30,338 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:14:30,342 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:14:30,342 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:14:30,366 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:14:30,366 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:14:30,367 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:14:30,367 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:14:30,367 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:14:30,368 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:14:30,374 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:14:30,375 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:14:30,375 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:14:30,376 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:14:30,376 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:14:30,376 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:14:30,377 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:14:30,377 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:14:30,377 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:14:30,378 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:14:30,378 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:14:30,378 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:14:30,378 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:14:30,379 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:14:30,379 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:14:30,379 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:14:30,379 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:14:30,380 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:14:30,380 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:14:30,380 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:14:30,380 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:14:30,381 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:14:30,381 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:14:30,381 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:14:30,381 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:14:30,382 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:14:30,382 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:14:30,382 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:14:30,382 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:14:30,383 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:14:30,383 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:14:30,383 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:14:30,383 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:14:30,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:14:30,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:14:30,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:14:30,587 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:14:30,587 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:14:30,588 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix051_tso.oepc.i [2024-06-21 21:14:31,675 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:14:31,903 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:14:31,904 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix051_tso.oepc.i [2024-06-21 21:14:31,914 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02beb11dc/f9fa1f42b528482c921132b6f8c70b28/FLAGfa54d4223 [2024-06-21 21:14:31,923 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02beb11dc/f9fa1f42b528482c921132b6f8c70b28 [2024-06-21 21:14:31,925 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:14:31,929 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:14:31,937 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix051_tso.oepc.yml/witness.yml [2024-06-21 21:14:32,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:14:32,085 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:14:32,087 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:14:32,087 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:14:32,091 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:14:32,091 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:14:31" (1/2) ... [2024-06-21 21:14:32,092 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54696def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:14:32, skipping insertion in model container [2024-06-21 21:14:32,092 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:14:31" (1/2) ... [2024-06-21 21:14:32,093 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@61a0a3f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:14:32, skipping insertion in model container [2024-06-21 21:14:32,094 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:14:32" (2/2) ... [2024-06-21 21:14:32,094 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54696def and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:32, skipping insertion in model container [2024-06-21 21:14:32,094 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:14:32" (2/2) ... [2024-06-21 21:14:32,094 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:14:32,288 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:14:32,289 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || x$r_buff0_thd4 == (_Bool)0) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff0_thd4 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$r_buff1_thd4 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-21 21:14:32,290 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((! multithreaded || x$r_buff0_thd4 == (_Bool)0) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff0_thd4 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$r_buff1_thd4 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-21 21:14:32,290 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((((! multithreaded || x$r_buff0_thd4 == (_Bool)0) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff0_thd4 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$r_buff1_thd4 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-21 21:14:32,290 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((! multithreaded || x$r_buff0_thd4 == (_Bool)0) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff0_thd4 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$r_buff1_thd4 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-21 21:14:32,290 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:14:32,290 INFO L106 edCorrectnessWitness]: ghost_update [L849-L849] multithreaded = 1; [2024-06-21 21:14:32,311 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:14:32,693 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:14:32,706 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:14:32,834 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:14:32,872 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:14:32,872 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:32 WrapperNode [2024-06-21 21:14:32,872 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:14:32,873 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:14:32,873 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:14:32,873 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:14:32,878 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 21.06 09:14:32" (1/1) ... [2024-06-21 21:14:32,891 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 21.06 09:14:32" (1/1) ... [2024-06-21 21:14:32,939 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 157 [2024-06-21 21:14:32,939 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:14:32,940 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:14:32,940 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:14:32,940 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:14:32,949 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:32" (1/1) ... [2024-06-21 21:14:32,949 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:32" (1/1) ... [2024-06-21 21:14:32,968 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:32" (1/1) ... [2024-06-21 21:14:32,988 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]. [2024-06-21 21:14:32,988 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:32" (1/1) ... [2024-06-21 21:14:32,988 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:32" (1/1) ... [2024-06-21 21:14:32,997 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:32" (1/1) ... [2024-06-21 21:14:33,002 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:32" (1/1) ... [2024-06-21 21:14:33,004 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:32" (1/1) ... [2024-06-21 21:14:33,005 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:32" (1/1) ... [2024-06-21 21:14:33,008 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:14:33,009 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:14:33,009 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:14:33,009 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:14:33,010 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:32" (1/1) ... [2024-06-21 21:14:33,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:14:33,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:14:33,084 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) [2024-06-21 21:14:33,125 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 [2024-06-21 21:14:33,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:14:33,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:14:33,146 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:14:33,146 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:14:33,147 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:14:33,147 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:14:33,147 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:14:33,147 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:14:33,147 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 21:14:33,147 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 21:14:33,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:14:33,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:14:33,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:14:33,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:14:33,150 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:14:33,248 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:14:33,250 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:14:33,618 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:14:33,618 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:14:33,758 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:14:33,758 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:14:33,758 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:14:33 BoogieIcfgContainer [2024-06-21 21:14:33,758 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:14:33,760 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:14:33,761 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:14:33,763 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:14:33,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:14:31" (1/4) ... [2024-06-21 21:14:33,764 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22fb9f2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:14:33, skipping insertion in model container [2024-06-21 21:14:33,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:14:32" (2/4) ... [2024-06-21 21:14:33,764 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22fb9f2f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:14:33, skipping insertion in model container [2024-06-21 21:14:33,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:32" (3/4) ... [2024-06-21 21:14:33,764 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22fb9f2f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:14:33, skipping insertion in model container [2024-06-21 21:14:33,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:14:33" (4/4) ... [2024-06-21 21:14:33,765 INFO L112 eAbstractionObserver]: Analyzing ICFG mix051_tso.oepc.i [2024-06-21 21:14:33,777 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:14:33,777 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 21:14:33,778 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:14:33,825 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:14:33,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 21:14:33,882 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2024-06-21 21:14:33,882 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:14:33,883 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 87 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. [2024-06-21 21:14:33,884 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 21:14:33,886 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 41 transitions, 94 flow [2024-06-21 21:14:33,897 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:14:33,902 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;@bf5b088, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:14:33,902 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 21:14:33,905 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:14:33,905 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:14:33,905 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:14:33,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:33,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:14:33,906 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)] === [2024-06-21 21:14:33,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:33,910 INFO L85 PathProgramCache]: Analyzing trace with hash 400202035, now seen corresponding path program 1 times [2024-06-21 21:14:33,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:33,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850532465] [2024-06-21 21:14:33,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:33,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:34,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:34,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850532465] [2024-06-21 21:14:34,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850532465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:34,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:34,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:14:34,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137044465] [2024-06-21 21:14:34,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:34,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:14:34,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:34,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:14:34,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:14:35,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 21:14:35,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:35,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:35,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 21:14:35,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:36,254 INFO L124 PetriNetUnfolderBase]: 8192/11588 cut-off events. [2024-06-21 21:14:36,254 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2024-06-21 21:14:36,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23151 conditions, 11588 events. 8192/11588 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 63990 event pairs, 6310 based on Foata normal form. 1/11373 useless extension candidates. Maximal degree in co-relation 23138. Up to 11172 conditions per place. [2024-06-21 21:14:36,326 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 42 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-21 21:14:36,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 225 flow [2024-06-21 21:14:36,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:14:36,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:14:36,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-21 21:14:36,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2024-06-21 21:14:36,338 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 94 flow. Second operand 3 states and 93 transitions. [2024-06-21 21:14:36,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 225 flow [2024-06-21 21:14:36,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 218 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 21:14:36,347 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 129 flow [2024-06-21 21:14:36,349 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} [2024-06-21 21:14:36,352 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-06-21 21:14:36,352 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 129 flow [2024-06-21 21:14:36,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:36,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:36,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:36,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:14:36,354 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)] === [2024-06-21 21:14:36,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:36,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1952851310, now seen corresponding path program 1 times [2024-06-21 21:14:36,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:36,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272486743] [2024-06-21 21:14:36,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:36,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:36,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:36,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272486743] [2024-06-21 21:14:36,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272486743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:36,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:36,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:14:36,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174682733] [2024-06-21 21:14:36,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:36,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:14:36,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:36,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:14:36,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:14:36,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:14:36,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:36,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:36,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:14:36,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:38,248 INFO L124 PetriNetUnfolderBase]: 9577/13187 cut-off events. [2024-06-21 21:14:38,248 INFO L125 PetriNetUnfolderBase]: For 2471/2471 co-relation queries the response was YES. [2024-06-21 21:14:38,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30036 conditions, 13187 events. 9577/13187 cut-off events. For 2471/2471 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 70148 event pairs, 6775 based on Foata normal form. 4/13158 useless extension candidates. Maximal degree in co-relation 30024. Up to 12982 conditions per place. [2024-06-21 21:14:38,328 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 53 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-21 21:14:38,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 319 flow [2024-06-21 21:14:38,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:14:38,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:14:38,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-06-21 21:14:38,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5784313725490197 [2024-06-21 21:14:38,330 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 129 flow. Second operand 4 states and 118 transitions. [2024-06-21 21:14:38,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 319 flow [2024-06-21 21:14:38,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:14:38,332 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 177 flow [2024-06-21 21:14:38,333 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} [2024-06-21 21:14:38,333 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-06-21 21:14:38,333 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 177 flow [2024-06-21 21:14:38,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:38,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:38,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:38,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:14:38,334 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)] === [2024-06-21 21:14:38,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:38,335 INFO L85 PathProgramCache]: Analyzing trace with hash -408846852, now seen corresponding path program 1 times [2024-06-21 21:14:38,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:38,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361586878] [2024-06-21 21:14:38,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:38,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:39,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:39,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361586878] [2024-06-21 21:14:39,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361586878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:39,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:39,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:14:39,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506362267] [2024-06-21 21:14:39,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:39,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:14:39,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:39,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:14:39,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:14:39,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:14:39,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:39,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:39,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:14:39,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:40,304 INFO L124 PetriNetUnfolderBase]: 9557/13165 cut-off events. [2024-06-21 21:14:40,304 INFO L125 PetriNetUnfolderBase]: For 7067/7067 co-relation queries the response was YES. [2024-06-21 21:14:40,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33389 conditions, 13165 events. 9557/13165 cut-off events. For 7067/7067 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 70104 event pairs, 5407 based on Foata normal form. 8/13140 useless extension candidates. Maximal degree in co-relation 33375. Up to 12912 conditions per place. [2024-06-21 21:14:40,357 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 64 selfloop transitions, 13 changer transitions 0/84 dead transitions. [2024-06-21 21:14:40,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 84 transitions, 431 flow [2024-06-21 21:14:40,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:14:40,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:14:40,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-21 21:14:40,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725490196078431 [2024-06-21 21:14:40,359 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 177 flow. Second operand 5 states and 146 transitions. [2024-06-21 21:14:40,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 84 transitions, 431 flow [2024-06-21 21:14:40,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 84 transitions, 412 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 21:14:40,362 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 225 flow [2024-06-21 21:14:40,363 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=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=225, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2024-06-21 21:14:40,363 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 5 predicate places. [2024-06-21 21:14:40,363 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 225 flow [2024-06-21 21:14:40,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:40,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:40,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:40,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:14:40,364 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)] === [2024-06-21 21:14:40,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:40,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1202062927, now seen corresponding path program 1 times [2024-06-21 21:14:40,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:40,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568418976] [2024-06-21 21:14:40,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:40,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:41,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:41,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568418976] [2024-06-21 21:14:41,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568418976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:41,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:41,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:14:41,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572340043] [2024-06-21 21:14:41,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:41,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:14:41,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:41,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:14:41,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:14:41,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:14:41,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 225 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:41,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:41,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:14:41,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:42,912 INFO L124 PetriNetUnfolderBase]: 9541/13143 cut-off events. [2024-06-21 21:14:42,913 INFO L125 PetriNetUnfolderBase]: For 13690/13690 co-relation queries the response was YES. [2024-06-21 21:14:42,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36701 conditions, 13143 events. 9541/13143 cut-off events. For 13690/13690 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 69902 event pairs, 4602 based on Foata normal form. 8/13118 useless extension candidates. Maximal degree in co-relation 36686. Up to 12846 conditions per place. [2024-06-21 21:14:42,967 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 71 selfloop transitions, 16 changer transitions 0/94 dead transitions. [2024-06-21 21:14:42,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 94 transitions, 515 flow [2024-06-21 21:14:42,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:14:42,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:14:42,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-21 21:14:42,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5522875816993464 [2024-06-21 21:14:42,969 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 225 flow. Second operand 6 states and 169 transitions. [2024-06-21 21:14:42,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 94 transitions, 515 flow [2024-06-21 21:14:42,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 94 transitions, 482 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 21:14:42,973 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 256 flow [2024-06-21 21:14:42,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-21 21:14:42,974 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-21 21:14:42,974 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 256 flow [2024-06-21 21:14:42,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:42,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:42,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:42,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:14:42,975 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)] === [2024-06-21 21:14:42,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:42,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1198197421, now seen corresponding path program 1 times [2024-06-21 21:14:42,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:42,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562449955] [2024-06-21 21:14:42,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:42,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:43,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:43,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562449955] [2024-06-21 21:14:43,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562449955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:43,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:43,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:14:43,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279380674] [2024-06-21 21:14:43,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:43,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:14:43,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:43,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:14:43,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:14:43,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 21:14:43,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 256 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 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) [2024-06-21 21:14:43,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:43,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 21:14:43,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:44,652 INFO L124 PetriNetUnfolderBase]: 8137/11567 cut-off events. [2024-06-21 21:14:44,652 INFO L125 PetriNetUnfolderBase]: For 18131/18131 co-relation queries the response was YES. [2024-06-21 21:14:44,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34439 conditions, 11567 events. 8137/11567 cut-off events. For 18131/18131 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 64197 event pairs, 4690 based on Foata normal form. 3/11567 useless extension candidates. Maximal degree in co-relation 34422. Up to 11079 conditions per place. [2024-06-21 21:14:44,705 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 58 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-21 21:14:44,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 77 transitions, 474 flow [2024-06-21 21:14:44,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:14:44,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:14:44,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-21 21:14:44,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43790849673202614 [2024-06-21 21:14:44,706 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 256 flow. Second operand 6 states and 134 transitions. [2024-06-21 21:14:44,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 77 transitions, 474 flow [2024-06-21 21:14:44,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 77 transitions, 426 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 21:14:44,712 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 292 flow [2024-06-21 21:14:44,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=292, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-21 21:14:44,712 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 10 predicate places. [2024-06-21 21:14:44,712 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 292 flow [2024-06-21 21:14:44,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 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) [2024-06-21 21:14:44,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:44,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:44,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:14:44,713 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)] === [2024-06-21 21:14:44,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:44,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1430906450, now seen corresponding path program 1 times [2024-06-21 21:14:44,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:44,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266608913] [2024-06-21 21:14:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:44,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:45,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:45,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266608913] [2024-06-21 21:14:45,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266608913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:45,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:45,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:14:45,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165435114] [2024-06-21 21:14:45,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:45,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:14:45,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:45,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:14:45,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:14:45,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:14:45,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 292 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:45,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:45,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:14:45,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:46,823 INFO L124 PetriNetUnfolderBase]: 9577/13226 cut-off events. [2024-06-21 21:14:46,823 INFO L125 PetriNetUnfolderBase]: For 31032/31032 co-relation queries the response was YES. [2024-06-21 21:14:46,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42846 conditions, 13226 events. 9577/13226 cut-off events. For 31032/31032 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 70244 event pairs, 5495 based on Foata normal form. 3/13224 useless extension candidates. Maximal degree in co-relation 42826. Up to 12957 conditions per place. [2024-06-21 21:14:46,910 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 68 selfloop transitions, 21 changer transitions 0/95 dead transitions. [2024-06-21 21:14:46,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 95 transitions, 594 flow [2024-06-21 21:14:46,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:14:46,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:14:46,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-21 21:14:46,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2024-06-21 21:14:46,912 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 292 flow. Second operand 7 states and 154 transitions. [2024-06-21 21:14:46,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 95 transitions, 594 flow [2024-06-21 21:14:46,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 95 transitions, 559 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 21:14:46,918 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 384 flow [2024-06-21 21:14:46,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=384, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2024-06-21 21:14:46,919 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2024-06-21 21:14:46,919 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 384 flow [2024-06-21 21:14:46,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:46,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:46,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:46,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:14:46,920 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)] === [2024-06-21 21:14:46,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:46,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1458761810, now seen corresponding path program 2 times [2024-06-21 21:14:46,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:46,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140878238] [2024-06-21 21:14:46,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:46,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:47,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:47,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140878238] [2024-06-21 21:14:47,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140878238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:47,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:47,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:14:47,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976533025] [2024-06-21 21:14:47,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:47,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:14:47,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:47,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:14:47,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:14:47,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:14:47,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 384 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:47,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:47,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:14:47,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:48,823 INFO L124 PetriNetUnfolderBase]: 9599/13284 cut-off events. [2024-06-21 21:14:48,823 INFO L125 PetriNetUnfolderBase]: For 42177/42189 co-relation queries the response was YES. [2024-06-21 21:14:48,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46398 conditions, 13284 events. 9599/13284 cut-off events. For 42177/42189 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 70736 event pairs, 5475 based on Foata normal form. 11/13288 useless extension candidates. Maximal degree in co-relation 46376. Up to 12939 conditions per place. [2024-06-21 21:14:48,903 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 69 selfloop transitions, 30 changer transitions 0/105 dead transitions. [2024-06-21 21:14:48,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 105 transitions, 764 flow [2024-06-21 21:14:48,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:14:48,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:14:48,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 21:14:48,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-21 21:14:48,905 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 384 flow. Second operand 6 states and 144 transitions. [2024-06-21 21:14:48,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 105 transitions, 764 flow [2024-06-21 21:14:48,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 105 transitions, 720 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 21:14:48,913 INFO L231 Difference]: Finished difference. Result has 73 places, 79 transitions, 499 flow [2024-06-21 21:14:48,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=499, PETRI_PLACES=73, PETRI_TRANSITIONS=79} [2024-06-21 21:14:48,914 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 19 predicate places. [2024-06-21 21:14:48,914 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 79 transitions, 499 flow [2024-06-21 21:14:48,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:48,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:48,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:48,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:14:48,915 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)] === [2024-06-21 21:14:48,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:48,915 INFO L85 PathProgramCache]: Analyzing trace with hash 740447338, now seen corresponding path program 3 times [2024-06-21 21:14:48,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:48,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535068085] [2024-06-21 21:14:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:48,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:49,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:49,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:49,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535068085] [2024-06-21 21:14:49,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535068085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:49,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:49,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:14:49,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891405170] [2024-06-21 21:14:49,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:49,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:14:49,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:49,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:14:49,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:14:49,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:14:49,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 79 transitions, 499 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:49,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:49,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:14:49,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:50,989 INFO L124 PetriNetUnfolderBase]: 9626/13326 cut-off events. [2024-06-21 21:14:50,989 INFO L125 PetriNetUnfolderBase]: For 56374/56374 co-relation queries the response was YES. [2024-06-21 21:14:51,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49867 conditions, 13326 events. 9626/13326 cut-off events. For 56374/56374 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 70967 event pairs, 5466 based on Foata normal form. 3/13326 useless extension candidates. Maximal degree in co-relation 49843. Up to 13007 conditions per place. [2024-06-21 21:14:51,059 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 83 selfloop transitions, 31 changer transitions 0/120 dead transitions. [2024-06-21 21:14:51,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 120 transitions, 871 flow [2024-06-21 21:14:51,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:14:51,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:14:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 21:14:51,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46218487394957986 [2024-06-21 21:14:51,061 INFO L175 Difference]: Start difference. First operand has 73 places, 79 transitions, 499 flow. Second operand 7 states and 165 transitions. [2024-06-21 21:14:51,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 120 transitions, 871 flow [2024-06-21 21:14:51,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 120 transitions, 802 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-21 21:14:51,079 INFO L231 Difference]: Finished difference. Result has 79 places, 89 transitions, 590 flow [2024-06-21 21:14:51,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=590, PETRI_PLACES=79, PETRI_TRANSITIONS=89} [2024-06-21 21:14:51,081 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 25 predicate places. [2024-06-21 21:14:51,081 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 89 transitions, 590 flow [2024-06-21 21:14:51,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:51,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:51,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:51,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:14:51,082 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)] === [2024-06-21 21:14:51,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:51,082 INFO L85 PathProgramCache]: Analyzing trace with hash 416520844, now seen corresponding path program 1 times [2024-06-21 21:14:51,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:51,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088549180] [2024-06-21 21:14:51,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:51,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:51,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:51,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088549180] [2024-06-21 21:14:51,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088549180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:51,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:51,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:14:51,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868103528] [2024-06-21 21:14:51,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:51,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:14:51,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:51,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:14:51,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:14:52,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:14:52,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 89 transitions, 590 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:52,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:52,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:14:52,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:53,240 INFO L124 PetriNetUnfolderBase]: 10021/14135 cut-off events. [2024-06-21 21:14:53,240 INFO L125 PetriNetUnfolderBase]: For 63399/63399 co-relation queries the response was YES. [2024-06-21 21:14:53,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53252 conditions, 14135 events. 10021/14135 cut-off events. For 63399/63399 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 77882 event pairs, 5576 based on Foata normal form. 3/14135 useless extension candidates. Maximal degree in co-relation 53225. Up to 13574 conditions per place. [2024-06-21 21:14:53,330 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 102 selfloop transitions, 19 changer transitions 0/127 dead transitions. [2024-06-21 21:14:53,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 127 transitions, 987 flow [2024-06-21 21:14:53,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:14:53,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:14:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-21 21:14:53,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2024-06-21 21:14:53,333 INFO L175 Difference]: Start difference. First operand has 79 places, 89 transitions, 590 flow. Second operand 7 states and 161 transitions. [2024-06-21 21:14:53,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 127 transitions, 987 flow [2024-06-21 21:14:53,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 127 transitions, 907 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 21:14:53,366 INFO L231 Difference]: Finished difference. Result has 81 places, 97 transitions, 635 flow [2024-06-21 21:14:53,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=635, PETRI_PLACES=81, PETRI_TRANSITIONS=97} [2024-06-21 21:14:53,367 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 27 predicate places. [2024-06-21 21:14:53,367 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 97 transitions, 635 flow [2024-06-21 21:14:53,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:53,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:53,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:53,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:14:53,368 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)] === [2024-06-21 21:14:53,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:53,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1005558990, now seen corresponding path program 1 times [2024-06-21 21:14:53,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:53,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285119057] [2024-06-21 21:14:53,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:53,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:54,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:54,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285119057] [2024-06-21 21:14:54,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285119057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:54,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:54,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:14:54,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205012897] [2024-06-21 21:14:54,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:54,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:14:54,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:54,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:14:54,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:14:54,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:14:54,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 97 transitions, 635 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:54,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:54,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:14:54,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:55,691 INFO L124 PetriNetUnfolderBase]: 11525/15883 cut-off events. [2024-06-21 21:14:55,692 INFO L125 PetriNetUnfolderBase]: For 95717/95717 co-relation queries the response was YES. [2024-06-21 21:14:55,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65517 conditions, 15883 events. 11525/15883 cut-off events. For 95717/95717 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 85805 event pairs, 5497 based on Foata normal form. 6/15881 useless extension candidates. Maximal degree in co-relation 65489. Up to 15489 conditions per place. [2024-06-21 21:14:55,820 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 103 selfloop transitions, 32 changer transitions 0/142 dead transitions. [2024-06-21 21:14:55,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 142 transitions, 1083 flow [2024-06-21 21:14:55,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:14:55,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:14:55,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 21:14:55,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4733893557422969 [2024-06-21 21:14:55,822 INFO L175 Difference]: Start difference. First operand has 81 places, 97 transitions, 635 flow. Second operand 7 states and 169 transitions. [2024-06-21 21:14:55,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 142 transitions, 1083 flow [2024-06-21 21:14:55,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 142 transitions, 1020 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 21:14:55,850 INFO L231 Difference]: Finished difference. Result has 85 places, 105 transitions, 727 flow [2024-06-21 21:14:55,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=727, PETRI_PLACES=85, PETRI_TRANSITIONS=105} [2024-06-21 21:14:55,851 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 31 predicate places. [2024-06-21 21:14:55,851 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 105 transitions, 727 flow [2024-06-21 21:14:55,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:55,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:55,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:55,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:14:55,852 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)] === [2024-06-21 21:14:55,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:55,852 INFO L85 PathProgramCache]: Analyzing trace with hash 20570064, now seen corresponding path program 2 times [2024-06-21 21:14:55,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:55,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735983862] [2024-06-21 21:14:55,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:55,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:56,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:56,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735983862] [2024-06-21 21:14:56,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735983862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:56,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:56,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:14:56,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923766321] [2024-06-21 21:14:56,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:56,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:14:56,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:56,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:14:56,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:14:56,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:14:56,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 105 transitions, 727 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:56,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:56,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:14:56,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:58,247 INFO L124 PetriNetUnfolderBase]: 11752/16218 cut-off events. [2024-06-21 21:14:58,248 INFO L125 PetriNetUnfolderBase]: For 121953/121953 co-relation queries the response was YES. [2024-06-21 21:14:58,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72475 conditions, 16218 events. 11752/16218 cut-off events. For 121953/121953 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 87577 event pairs, 5097 based on Foata normal form. 12/16227 useless extension candidates. Maximal degree in co-relation 72445. Up to 15561 conditions per place. [2024-06-21 21:14:58,367 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 102 selfloop transitions, 45 changer transitions 0/154 dead transitions. [2024-06-21 21:14:58,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 154 transitions, 1327 flow [2024-06-21 21:14:58,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:14:58,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:14:58,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 21:14:58,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48739495798319327 [2024-06-21 21:14:58,369 INFO L175 Difference]: Start difference. First operand has 85 places, 105 transitions, 727 flow. Second operand 7 states and 174 transitions. [2024-06-21 21:14:58,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 154 transitions, 1327 flow [2024-06-21 21:14:58,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 154 transitions, 1256 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 21:14:58,413 INFO L231 Difference]: Finished difference. Result has 90 places, 115 transitions, 914 flow [2024-06-21 21:14:58,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=914, PETRI_PLACES=90, PETRI_TRANSITIONS=115} [2024-06-21 21:14:58,413 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 36 predicate places. [2024-06-21 21:14:58,413 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 115 transitions, 914 flow [2024-06-21 21:14:58,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:58,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:58,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:58,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:14:58,414 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)] === [2024-06-21 21:14:58,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:58,415 INFO L85 PathProgramCache]: Analyzing trace with hash -2023023252, now seen corresponding path program 3 times [2024-06-21 21:14:58,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:58,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414862014] [2024-06-21 21:14:58,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:58,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:59,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:59,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:59,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414862014] [2024-06-21 21:14:59,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414862014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:59,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:59,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:14:59,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513186374] [2024-06-21 21:14:59,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:59,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:14:59,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:59,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:14:59,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:14:59,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:14:59,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 115 transitions, 914 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:59,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:59,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:14:59,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:00,936 INFO L124 PetriNetUnfolderBase]: 11769/16223 cut-off events. [2024-06-21 21:15:00,936 INFO L125 PetriNetUnfolderBase]: For 154626/154638 co-relation queries the response was YES. [2024-06-21 21:15:01,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78412 conditions, 16223 events. 11769/16223 cut-off events. For 154626/154638 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 87729 event pairs, 4839 based on Foata normal form. 26/16236 useless extension candidates. Maximal degree in co-relation 78380. Up to 15353 conditions per place. [2024-06-21 21:15:01,093 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 98 selfloop transitions, 61 changer transitions 0/166 dead transitions. [2024-06-21 21:15:01,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 166 transitions, 1636 flow [2024-06-21 21:15:01,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:01,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:01,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 21:15:01,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014005602240896 [2024-06-21 21:15:01,095 INFO L175 Difference]: Start difference. First operand has 90 places, 115 transitions, 914 flow. Second operand 7 states and 179 transitions. [2024-06-21 21:15:01,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 166 transitions, 1636 flow [2024-06-21 21:15:01,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 166 transitions, 1560 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 21:15:01,154 INFO L231 Difference]: Finished difference. Result has 95 places, 125 transitions, 1135 flow [2024-06-21 21:15:01,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1135, PETRI_PLACES=95, PETRI_TRANSITIONS=125} [2024-06-21 21:15:01,155 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 41 predicate places. [2024-06-21 21:15:01,155 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 125 transitions, 1135 flow [2024-06-21 21:15:01,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:01,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:01,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:01,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:15:01,155 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)] === [2024-06-21 21:15:01,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:01,156 INFO L85 PathProgramCache]: Analyzing trace with hash -828061236, now seen corresponding path program 1 times [2024-06-21 21:15:01,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:01,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609552515] [2024-06-21 21:15:01,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:01,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:01,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:02,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:02,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609552515] [2024-06-21 21:15:02,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609552515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:02,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:02,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:02,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331362202] [2024-06-21 21:15:02,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:02,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:02,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:02,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:02,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:02,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:15:02,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 125 transitions, 1135 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 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) [2024-06-21 21:15:02,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:02,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:15:02,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:03,826 INFO L124 PetriNetUnfolderBase]: 10413/14597 cut-off events. [2024-06-21 21:15:03,826 INFO L125 PetriNetUnfolderBase]: For 154458/154458 co-relation queries the response was YES. [2024-06-21 21:15:03,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73462 conditions, 14597 events. 10413/14597 cut-off events. For 154458/154458 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 79813 event pairs, 4459 based on Foata normal form. 6/14600 useless extension candidates. Maximal degree in co-relation 73427. Up to 14081 conditions per place. [2024-06-21 21:15:03,949 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 138 selfloop transitions, 22 changer transitions 0/166 dead transitions. [2024-06-21 21:15:03,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 166 transitions, 1629 flow [2024-06-21 21:15:03,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:03,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:03,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 21:15:03,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485294117647059 [2024-06-21 21:15:03,951 INFO L175 Difference]: Start difference. First operand has 95 places, 125 transitions, 1135 flow. Second operand 8 states and 183 transitions. [2024-06-21 21:15:03,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 166 transitions, 1629 flow [2024-06-21 21:15:04,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 166 transitions, 1460 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-21 21:15:04,050 INFO L231 Difference]: Finished difference. Result has 99 places, 128 transitions, 1082 flow [2024-06-21 21:15:04,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1082, PETRI_PLACES=99, PETRI_TRANSITIONS=128} [2024-06-21 21:15:04,051 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 45 predicate places. [2024-06-21 21:15:04,051 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 128 transitions, 1082 flow [2024-06-21 21:15:04,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 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) [2024-06-21 21:15:04,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:04,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:04,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:15:04,052 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)] === [2024-06-21 21:15:04,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:04,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1349759235, now seen corresponding path program 1 times [2024-06-21 21:15:04,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:04,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988278187] [2024-06-21 21:15:04,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:04,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:04,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:04,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988278187] [2024-06-21 21:15:04,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988278187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:04,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:04,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:15:04,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874799622] [2024-06-21 21:15:04,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:04,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:15:04,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:04,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:15:04,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:15:04,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:15:04,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 128 transitions, 1082 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:04,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:04,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:15:04,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:06,319 INFO L124 PetriNetUnfolderBase]: 10399/14835 cut-off events. [2024-06-21 21:15:06,320 INFO L125 PetriNetUnfolderBase]: For 158415/158415 co-relation queries the response was YES. [2024-06-21 21:15:06,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73050 conditions, 14835 events. 10399/14835 cut-off events. For 158415/158415 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 82680 event pairs, 4533 based on Foata normal form. 4/14836 useless extension candidates. Maximal degree in co-relation 73014. Up to 14120 conditions per place. [2024-06-21 21:15:06,421 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 129 selfloop transitions, 11 changer transitions 0/146 dead transitions. [2024-06-21 21:15:06,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 146 transitions, 1450 flow [2024-06-21 21:15:06,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:15:06,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:15:06,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-21 21:15:06,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470588235294118 [2024-06-21 21:15:06,422 INFO L175 Difference]: Start difference. First operand has 99 places, 128 transitions, 1082 flow. Second operand 5 states and 114 transitions. [2024-06-21 21:15:06,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 146 transitions, 1450 flow [2024-06-21 21:15:06,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 146 transitions, 1364 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 21:15:06,496 INFO L231 Difference]: Finished difference. Result has 98 places, 132 transitions, 1081 flow [2024-06-21 21:15:06,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1081, PETRI_PLACES=98, PETRI_TRANSITIONS=132} [2024-06-21 21:15:06,497 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 44 predicate places. [2024-06-21 21:15:06,497 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 132 transitions, 1081 flow [2024-06-21 21:15:06,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:06,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:06,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:06,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:15:06,498 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)] === [2024-06-21 21:15:06,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:06,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1107646903, now seen corresponding path program 1 times [2024-06-21 21:15:06,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:06,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188910866] [2024-06-21 21:15:06,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:06,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:07,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:07,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188910866] [2024-06-21 21:15:07,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188910866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:07,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:07,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:07,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721935420] [2024-06-21 21:15:07,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:07,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:07,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:07,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:07,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:07,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:15:07,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 132 transitions, 1081 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 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) [2024-06-21 21:15:07,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:07,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:15:07,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:09,517 INFO L124 PetriNetUnfolderBase]: 11681/16099 cut-off events. [2024-06-21 21:15:09,518 INFO L125 PetriNetUnfolderBase]: For 214068/214068 co-relation queries the response was YES. [2024-06-21 21:15:09,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86641 conditions, 16099 events. 11681/16099 cut-off events. For 214068/214068 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 87242 event pairs, 5068 based on Foata normal form. 3/16099 useless extension candidates. Maximal degree in co-relation 86604. Up to 15695 conditions per place. [2024-06-21 21:15:09,626 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 130 selfloop transitions, 35 changer transitions 0/172 dead transitions. [2024-06-21 21:15:09,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 172 transitions, 1594 flow [2024-06-21 21:15:09,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:09,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:09,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 21:15:09,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4733893557422969 [2024-06-21 21:15:09,628 INFO L175 Difference]: Start difference. First operand has 98 places, 132 transitions, 1081 flow. Second operand 7 states and 169 transitions. [2024-06-21 21:15:09,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 172 transitions, 1594 flow [2024-06-21 21:15:09,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 172 transitions, 1539 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 21:15:09,704 INFO L231 Difference]: Finished difference. Result has 102 places, 136 transitions, 1189 flow [2024-06-21 21:15:09,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1189, PETRI_PLACES=102, PETRI_TRANSITIONS=136} [2024-06-21 21:15:09,705 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 48 predicate places. [2024-06-21 21:15:09,705 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 136 transitions, 1189 flow [2024-06-21 21:15:09,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 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) [2024-06-21 21:15:09,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:09,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:09,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:15:09,706 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)] === [2024-06-21 21:15:09,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:09,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1103831671, now seen corresponding path program 1 times [2024-06-21 21:15:09,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:09,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603128980] [2024-06-21 21:15:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:09,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:10,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:10,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603128980] [2024-06-21 21:15:10,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603128980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:10,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:10,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:10,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189958790] [2024-06-21 21:15:10,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:10,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:10,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:10,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:10,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:10,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-21 21:15:10,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 136 transitions, 1189 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:10,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:10,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-21 21:15:10,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:12,757 INFO L124 PetriNetUnfolderBase]: 12405/17023 cut-off events. [2024-06-21 21:15:12,757 INFO L125 PetriNetUnfolderBase]: For 231290/231290 co-relation queries the response was YES. [2024-06-21 21:15:12,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90619 conditions, 17023 events. 12405/17023 cut-off events. For 231290/231290 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 89756 event pairs, 4981 based on Foata normal form. 9/17023 useless extension candidates. Maximal degree in co-relation 90581. Up to 16363 conditions per place. [2024-06-21 21:15:12,890 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 146 selfloop transitions, 70 changer transitions 0/221 dead transitions. [2024-06-21 21:15:12,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 221 transitions, 2238 flow [2024-06-21 21:15:12,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:15:12,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:15:12,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-21 21:15:12,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4400871459694989 [2024-06-21 21:15:12,893 INFO L175 Difference]: Start difference. First operand has 102 places, 136 transitions, 1189 flow. Second operand 9 states and 202 transitions. [2024-06-21 21:15:12,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 221 transitions, 2238 flow [2024-06-21 21:15:13,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 221 transitions, 2028 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-21 21:15:13,007 INFO L231 Difference]: Finished difference. Result has 109 places, 176 transitions, 1668 flow [2024-06-21 21:15:13,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1668, PETRI_PLACES=109, PETRI_TRANSITIONS=176} [2024-06-21 21:15:13,007 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 55 predicate places. [2024-06-21 21:15:13,007 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 176 transitions, 1668 flow [2024-06-21 21:15:13,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:13,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:13,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:13,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:15:13,008 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)] === [2024-06-21 21:15:13,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:13,008 INFO L85 PathProgramCache]: Analyzing trace with hash 836980651, now seen corresponding path program 2 times [2024-06-21 21:15:13,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:13,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873387827] [2024-06-21 21:15:13,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:13,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:14,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:14,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873387827] [2024-06-21 21:15:14,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873387827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:14,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:14,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:14,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079645545] [2024-06-21 21:15:14,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:14,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:14,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:14,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:14,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:14,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-21 21:15:14,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 176 transitions, 1668 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:14,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:14,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-21 21:15:14,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:16,093 INFO L124 PetriNetUnfolderBase]: 12537/17209 cut-off events. [2024-06-21 21:15:16,094 INFO L125 PetriNetUnfolderBase]: For 253196/253208 co-relation queries the response was YES. [2024-06-21 21:15:16,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93918 conditions, 17209 events. 12537/17209 cut-off events. For 253196/253208 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 90534 event pairs, 5000 based on Foata normal form. 17/17209 useless extension candidates. Maximal degree in co-relation 93876. Up to 16188 conditions per place. [2024-06-21 21:15:16,207 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 129 selfloop transitions, 105 changer transitions 0/239 dead transitions. [2024-06-21 21:15:16,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 239 transitions, 2446 flow [2024-06-21 21:15:16,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:15:16,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:15:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-21 21:15:16,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:15:16,209 INFO L175 Difference]: Start difference. First operand has 109 places, 176 transitions, 1668 flow. Second operand 9 states and 204 transitions. [2024-06-21 21:15:16,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 239 transitions, 2446 flow [2024-06-21 21:15:16,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 239 transitions, 2386 flow, removed 29 selfloop flow, removed 1 redundant places. [2024-06-21 21:15:16,337 INFO L231 Difference]: Finished difference. Result has 119 places, 195 transitions, 2084 flow [2024-06-21 21:15:16,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1608, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2084, PETRI_PLACES=119, PETRI_TRANSITIONS=195} [2024-06-21 21:15:16,338 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 65 predicate places. [2024-06-21 21:15:16,338 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 195 transitions, 2084 flow [2024-06-21 21:15:16,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:16,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:16,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:16,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:15:16,339 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)] === [2024-06-21 21:15:16,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:16,339 INFO L85 PathProgramCache]: Analyzing trace with hash 99896713, now seen corresponding path program 3 times [2024-06-21 21:15:16,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:16,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291188748] [2024-06-21 21:15:16,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:16,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:17,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:17,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291188748] [2024-06-21 21:15:17,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291188748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:17,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:17,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:17,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877302556] [2024-06-21 21:15:17,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:17,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:17,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:17,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:17,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:17,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-21 21:15:17,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 195 transitions, 2084 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:17,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:17,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-21 21:15:17,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:19,600 INFO L124 PetriNetUnfolderBase]: 12516/17169 cut-off events. [2024-06-21 21:15:19,601 INFO L125 PetriNetUnfolderBase]: For 276621/276645 co-relation queries the response was YES. [2024-06-21 21:15:19,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96807 conditions, 17169 events. 12516/17169 cut-off events. For 276621/276645 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 90261 event pairs, 4986 based on Foata normal form. 19/17179 useless extension candidates. Maximal degree in co-relation 96760. Up to 16667 conditions per place. [2024-06-21 21:15:19,735 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 181 selfloop transitions, 80 changer transitions 0/266 dead transitions. [2024-06-21 21:15:19,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 266 transitions, 3180 flow [2024-06-21 21:15:19,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:15:19,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:15:19,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-21 21:15:19,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:15:19,750 INFO L175 Difference]: Start difference. First operand has 119 places, 195 transitions, 2084 flow. Second operand 9 states and 204 transitions. [2024-06-21 21:15:19,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 266 transitions, 3180 flow [2024-06-21 21:15:19,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 266 transitions, 3050 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-21 21:15:19,906 INFO L231 Difference]: Finished difference. Result has 127 places, 219 transitions, 2529 flow [2024-06-21 21:15:19,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1996, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2529, PETRI_PLACES=127, PETRI_TRANSITIONS=219} [2024-06-21 21:15:19,906 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 73 predicate places. [2024-06-21 21:15:19,907 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 219 transitions, 2529 flow [2024-06-21 21:15:19,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:19,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:19,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:19,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:15:19,907 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)] === [2024-06-21 21:15:19,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:19,908 INFO L85 PathProgramCache]: Analyzing trace with hash -535770197, now seen corresponding path program 4 times [2024-06-21 21:15:19,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:19,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045499031] [2024-06-21 21:15:19,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:19,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:20,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:20,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045499031] [2024-06-21 21:15:20,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045499031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:20,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:20,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:20,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046189707] [2024-06-21 21:15:20,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:20,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:20,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:20,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:20,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:20,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-21 21:15:20,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 219 transitions, 2529 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:20,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:20,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-21 21:15:20,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:23,219 INFO L124 PetriNetUnfolderBase]: 12747/17483 cut-off events. [2024-06-21 21:15:23,219 INFO L125 PetriNetUnfolderBase]: For 300377/300377 co-relation queries the response was YES. [2024-06-21 21:15:23,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101081 conditions, 17483 events. 12747/17483 cut-off events. For 300377/300377 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 91941 event pairs, 4962 based on Foata normal form. 9/17489 useless extension candidates. Maximal degree in co-relation 101030. Up to 16636 conditions per place. [2024-06-21 21:15:23,348 INFO L140 encePairwiseOnDemand]: 34/51 looper letters, 197 selfloop transitions, 116 changer transitions 0/318 dead transitions. [2024-06-21 21:15:23,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 318 transitions, 3909 flow [2024-06-21 21:15:23,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:15:23,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:15:23,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-21 21:15:23,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4596949891067538 [2024-06-21 21:15:23,350 INFO L175 Difference]: Start difference. First operand has 127 places, 219 transitions, 2529 flow. Second operand 9 states and 211 transitions. [2024-06-21 21:15:23,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 318 transitions, 3909 flow [2024-06-21 21:15:23,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 318 transitions, 3691 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-21 21:15:23,685 INFO L231 Difference]: Finished difference. Result has 136 places, 269 transitions, 3323 flow [2024-06-21 21:15:23,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2317, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3323, PETRI_PLACES=136, PETRI_TRANSITIONS=269} [2024-06-21 21:15:23,686 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 82 predicate places. [2024-06-21 21:15:23,686 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 269 transitions, 3323 flow [2024-06-21 21:15:23,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:23,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:23,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:23,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:15:23,686 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)] === [2024-06-21 21:15:23,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:23,687 INFO L85 PathProgramCache]: Analyzing trace with hash 466379785, now seen corresponding path program 1 times [2024-06-21 21:15:23,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:23,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187709542] [2024-06-21 21:15:23,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:23,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:24,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:24,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187709542] [2024-06-21 21:15:24,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187709542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:24,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:24,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:15:24,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165148182] [2024-06-21 21:15:24,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:24,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:15:24,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:24,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:15:24,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:15:24,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:15:24,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 269 transitions, 3323 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 21:15:24,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:24,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:15:24,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:27,293 INFO L124 PetriNetUnfolderBase]: 12229/16969 cut-off events. [2024-06-21 21:15:27,293 INFO L125 PetriNetUnfolderBase]: For 326487/326585 co-relation queries the response was YES. [2024-06-21 21:15:27,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101224 conditions, 16969 events. 12229/16969 cut-off events. For 326487/326585 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 92539 event pairs, 3976 based on Foata normal form. 76/17017 useless extension candidates. Maximal degree in co-relation 101169. Up to 16349 conditions per place. [2024-06-21 21:15:27,445 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 252 selfloop transitions, 48 changer transitions 0/315 dead transitions. [2024-06-21 21:15:27,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 315 transitions, 4141 flow [2024-06-21 21:15:27,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:27,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:27,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 21:15:27,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46568627450980393 [2024-06-21 21:15:27,447 INFO L175 Difference]: Start difference. First operand has 136 places, 269 transitions, 3323 flow. Second operand 8 states and 190 transitions. [2024-06-21 21:15:27,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 315 transitions, 4141 flow [2024-06-21 21:15:27,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 315 transitions, 3804 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 21:15:27,792 INFO L231 Difference]: Finished difference. Result has 138 places, 272 transitions, 3184 flow [2024-06-21 21:15:27,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3006, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3184, PETRI_PLACES=138, PETRI_TRANSITIONS=272} [2024-06-21 21:15:27,793 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 84 predicate places. [2024-06-21 21:15:27,793 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 272 transitions, 3184 flow [2024-06-21 21:15:27,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 21:15:27,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:27,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:27,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:15:27,793 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:27,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:27,794 INFO L85 PathProgramCache]: Analyzing trace with hash 466440235, now seen corresponding path program 2 times [2024-06-21 21:15:27,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:27,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077972282] [2024-06-21 21:15:27,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:27,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:29,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:29,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:29,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077972282] [2024-06-21 21:15:29,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077972282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:29,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:29,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:15:29,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18221278] [2024-06-21 21:15:29,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:29,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:15:29,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:29,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:15:29,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:15:29,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:15:29,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 272 transitions, 3184 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 21:15:29,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:29,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:15:29,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:31,446 INFO L124 PetriNetUnfolderBase]: 12279/17056 cut-off events. [2024-06-21 21:15:31,446 INFO L125 PetriNetUnfolderBase]: For 362828/362880 co-relation queries the response was YES. [2024-06-21 21:15:31,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104401 conditions, 17056 events. 12279/17056 cut-off events. For 362828/362880 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 93223 event pairs, 4462 based on Foata normal form. 12/17017 useless extension candidates. Maximal degree in co-relation 104346. Up to 16255 conditions per place. [2024-06-21 21:15:31,612 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 216 selfloop transitions, 87 changer transitions 0/318 dead transitions. [2024-06-21 21:15:31,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 318 transitions, 3996 flow [2024-06-21 21:15:31,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:31,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:31,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 21:15:31,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681372549019608 [2024-06-21 21:15:31,614 INFO L175 Difference]: Start difference. First operand has 138 places, 272 transitions, 3184 flow. Second operand 8 states and 191 transitions. [2024-06-21 21:15:31,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 318 transitions, 3996 flow [2024-06-21 21:15:32,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 318 transitions, 3844 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 21:15:32,060 INFO L231 Difference]: Finished difference. Result has 140 places, 275 transitions, 3305 flow [2024-06-21 21:15:32,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3032, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3305, PETRI_PLACES=140, PETRI_TRANSITIONS=275} [2024-06-21 21:15:32,061 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 86 predicate places. [2024-06-21 21:15:32,061 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 275 transitions, 3305 flow [2024-06-21 21:15:32,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 21:15:32,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:32,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:32,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:15:32,061 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)] === [2024-06-21 21:15:32,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:32,062 INFO L85 PathProgramCache]: Analyzing trace with hash 140773011, now seen corresponding path program 3 times [2024-06-21 21:15:32,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:32,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886953905] [2024-06-21 21:15:32,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:32,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:33,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:33,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886953905] [2024-06-21 21:15:33,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886953905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:33,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:33,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:15:33,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879562604] [2024-06-21 21:15:33,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:33,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:15:33,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:33,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:15:33,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:15:33,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:15:33,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 275 transitions, 3305 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 21:15:33,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:33,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:15:33,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:35,929 INFO L124 PetriNetUnfolderBase]: 12507/17373 cut-off events. [2024-06-21 21:15:35,930 INFO L125 PetriNetUnfolderBase]: For 422030/422082 co-relation queries the response was YES. [2024-06-21 21:15:36,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109973 conditions, 17373 events. 12507/17373 cut-off events. For 422030/422082 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 94823 event pairs, 4485 based on Foata normal form. 42/17369 useless extension candidates. Maximal degree in co-relation 109917. Up to 16017 conditions per place. [2024-06-21 21:15:36,081 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 165 selfloop transitions, 144 changer transitions 0/324 dead transitions. [2024-06-21 21:15:36,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 324 transitions, 4153 flow [2024-06-21 21:15:36,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:36,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:36,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 21:15:36,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48284313725490197 [2024-06-21 21:15:36,083 INFO L175 Difference]: Start difference. First operand has 140 places, 275 transitions, 3305 flow. Second operand 8 states and 197 transitions. [2024-06-21 21:15:36,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 324 transitions, 4153 flow [2024-06-21 21:15:36,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 324 transitions, 3928 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 21:15:36,452 INFO L231 Difference]: Finished difference. Result has 142 places, 278 transitions, 3469 flow [2024-06-21 21:15:36,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3080, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3469, PETRI_PLACES=142, PETRI_TRANSITIONS=278} [2024-06-21 21:15:36,452 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 88 predicate places. [2024-06-21 21:15:36,453 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 278 transitions, 3469 flow [2024-06-21 21:15:36,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 21:15:36,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:36,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:36,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:15:36,453 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)] === [2024-06-21 21:15:36,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:36,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1706790647, now seen corresponding path program 1 times [2024-06-21 21:15:36,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:36,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482475016] [2024-06-21 21:15:36,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:36,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:37,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:37,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:37,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482475016] [2024-06-21 21:15:37,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482475016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:37,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:37,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:15:37,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969450936] [2024-06-21 21:15:37,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:37,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:15:37,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:37,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:15:37,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:15:38,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-21 21:15:38,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 278 transitions, 3469 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:38,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:38,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-21 21:15:38,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:40,790 INFO L124 PetriNetUnfolderBase]: 13163/18104 cut-off events. [2024-06-21 21:15:40,791 INFO L125 PetriNetUnfolderBase]: For 455385/455397 co-relation queries the response was YES. [2024-06-21 21:15:40,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116074 conditions, 18104 events. 13163/18104 cut-off events. For 455385/455397 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 96091 event pairs, 4731 based on Foata normal form. 14/18108 useless extension candidates. Maximal degree in co-relation 116017. Up to 17716 conditions per place. [2024-06-21 21:15:40,945 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 273 selfloop transitions, 48 changer transitions 0/326 dead transitions. [2024-06-21 21:15:40,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 326 transitions, 4325 flow [2024-06-21 21:15:40,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:15:40,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:15:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-21 21:15:40,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4137254901960784 [2024-06-21 21:15:40,947 INFO L175 Difference]: Start difference. First operand has 142 places, 278 transitions, 3469 flow. Second operand 10 states and 211 transitions. [2024-06-21 21:15:40,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 326 transitions, 4325 flow [2024-06-21 21:15:41,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 326 transitions, 3994 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 21:15:41,550 INFO L231 Difference]: Finished difference. Result has 146 places, 281 transitions, 3325 flow [2024-06-21 21:15:41,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3138, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3325, PETRI_PLACES=146, PETRI_TRANSITIONS=281} [2024-06-21 21:15:41,551 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 92 predicate places. [2024-06-21 21:15:41,551 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 281 transitions, 3325 flow [2024-06-21 21:15:41,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:41,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:41,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:41,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:15:41,551 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:41,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:41,552 INFO L85 PathProgramCache]: Analyzing trace with hash -936461668, now seen corresponding path program 1 times [2024-06-21 21:15:41,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:41,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278170564] [2024-06-21 21:15:41,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:41,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:42,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:42,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278170564] [2024-06-21 21:15:42,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278170564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:42,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:42,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:15:42,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958417559] [2024-06-21 21:15:42,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:42,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:15:42,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:42,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:15:42,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:15:42,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-21 21:15:42,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 281 transitions, 3325 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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) [2024-06-21 21:15:42,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:42,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-21 21:15:42,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:45,127 INFO L124 PetriNetUnfolderBase]: 13195/18165 cut-off events. [2024-06-21 21:15:45,127 INFO L125 PetriNetUnfolderBase]: For 484766/484766 co-relation queries the response was YES. [2024-06-21 21:15:45,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117700 conditions, 18165 events. 13195/18165 cut-off events. For 484766/484766 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 96581 event pairs, 4760 based on Foata normal form. 4/18163 useless extension candidates. Maximal degree in co-relation 117642. Up to 17797 conditions per place. [2024-06-21 21:15:45,285 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 280 selfloop transitions, 31 changer transitions 0/316 dead transitions. [2024-06-21 21:15:45,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 316 transitions, 4245 flow [2024-06-21 21:15:45,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:15:45,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:15:45,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 21:15:45,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45751633986928103 [2024-06-21 21:15:45,286 INFO L175 Difference]: Start difference. First operand has 146 places, 281 transitions, 3325 flow. Second operand 6 states and 140 transitions. [2024-06-21 21:15:45,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 316 transitions, 4245 flow [2024-06-21 21:15:45,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 316 transitions, 4100 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 21:15:45,781 INFO L231 Difference]: Finished difference. Result has 146 places, 289 transitions, 3389 flow [2024-06-21 21:15:45,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3180, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3389, PETRI_PLACES=146, PETRI_TRANSITIONS=289} [2024-06-21 21:15:45,781 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 92 predicate places. [2024-06-21 21:15:45,782 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 289 transitions, 3389 flow [2024-06-21 21:15:45,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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) [2024-06-21 21:15:45,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:45,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:45,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:15:45,782 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:45,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:45,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1434343411, now seen corresponding path program 2 times [2024-06-21 21:15:45,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:45,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94915374] [2024-06-21 21:15:45,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:45,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:46,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:46,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94915374] [2024-06-21 21:15:46,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94915374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:46,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:46,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:15:46,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147185189] [2024-06-21 21:15:46,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:46,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:15:46,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:46,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:15:46,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:15:47,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-21 21:15:47,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 289 transitions, 3389 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:47,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:47,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-21 21:15:47,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:49,717 INFO L124 PetriNetUnfolderBase]: 13395/18454 cut-off events. [2024-06-21 21:15:49,717 INFO L125 PetriNetUnfolderBase]: For 542636/542648 co-relation queries the response was YES. [2024-06-21 21:15:49,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123285 conditions, 18454 events. 13395/18454 cut-off events. For 542636/542648 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 98289 event pairs, 4727 based on Foata normal form. 44/18477 useless extension candidates. Maximal degree in co-relation 123226. Up to 17050 conditions per place. [2024-06-21 21:15:49,870 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 190 selfloop transitions, 150 changer transitions 0/345 dead transitions. [2024-06-21 21:15:49,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 345 transitions, 4329 flow [2024-06-21 21:15:49,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:15:49,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:15:49,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-21 21:15:49,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684095860566449 [2024-06-21 21:15:49,871 INFO L175 Difference]: Start difference. First operand has 146 places, 289 transitions, 3389 flow. Second operand 9 states and 215 transitions. [2024-06-21 21:15:49,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 345 transitions, 4329 flow [2024-06-21 21:15:50,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 345 transitions, 4258 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-21 21:15:50,310 INFO L231 Difference]: Finished difference. Result has 153 places, 292 transitions, 3720 flow [2024-06-21 21:15:50,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3318, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3720, PETRI_PLACES=153, PETRI_TRANSITIONS=292} [2024-06-21 21:15:50,311 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 99 predicate places. [2024-06-21 21:15:50,311 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 292 transitions, 3720 flow [2024-06-21 21:15:50,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:50,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:50,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:50,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:15:50,311 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:50,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:50,312 INFO L85 PathProgramCache]: Analyzing trace with hash 176412849, now seen corresponding path program 4 times [2024-06-21 21:15:50,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:50,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909471319] [2024-06-21 21:15:50,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:50,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:51,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:51,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909471319] [2024-06-21 21:15:51,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909471319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:51,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:51,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:15:51,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893476412] [2024-06-21 21:15:51,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:51,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:15:51,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:51,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:15:51,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:15:51,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:15:51,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 292 transitions, 3720 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 21:15:51,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:51,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:15:51,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:54,561 INFO L124 PetriNetUnfolderBase]: 12929/18002 cut-off events. [2024-06-21 21:15:54,561 INFO L125 PetriNetUnfolderBase]: For 607528/607577 co-relation queries the response was YES. [2024-06-21 21:15:54,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126124 conditions, 18002 events. 12929/18002 cut-off events. For 607528/607577 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 98958 event pairs, 4477 based on Foata normal form. 50/17988 useless extension candidates. Maximal degree in co-relation 126063. Up to 16324 conditions per place. [2024-06-21 21:15:54,718 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 151 selfloop transitions, 177 changer transitions 0/343 dead transitions. [2024-06-21 21:15:54,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 343 transitions, 4772 flow [2024-06-21 21:15:54,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:54,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:54,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 21:15:54,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4950980392156863 [2024-06-21 21:15:54,722 INFO L175 Difference]: Start difference. First operand has 153 places, 292 transitions, 3720 flow. Second operand 8 states and 202 transitions. [2024-06-21 21:15:54,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 343 transitions, 4772 flow [2024-06-21 21:15:55,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 343 transitions, 4416 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 21:15:55,255 INFO L231 Difference]: Finished difference. Result has 154 places, 295 transitions, 3831 flow [2024-06-21 21:15:55,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3364, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3831, PETRI_PLACES=154, PETRI_TRANSITIONS=295} [2024-06-21 21:15:55,255 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 100 predicate places. [2024-06-21 21:15:55,256 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 295 transitions, 3831 flow [2024-06-21 21:15:55,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 21:15:55,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:55,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:55,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:15:55,256 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:55,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:55,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1197871381, now seen corresponding path program 3 times [2024-06-21 21:15:55,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:55,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013480554] [2024-06-21 21:15:55,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:55,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:56,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:56,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013480554] [2024-06-21 21:15:56,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013480554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:56,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:56,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:15:56,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859238020] [2024-06-21 21:15:56,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:56,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:15:56,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:56,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:15:56,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:15:56,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-21 21:15:56,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 295 transitions, 3831 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:56,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:56,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-21 21:15:56,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:59,736 INFO L124 PetriNetUnfolderBase]: 13798/19063 cut-off events. [2024-06-21 21:15:59,736 INFO L125 PetriNetUnfolderBase]: For 651498/651510 co-relation queries the response was YES. [2024-06-21 21:15:59,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134423 conditions, 19063 events. 13798/19063 cut-off events. For 651498/651510 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 102388 event pairs, 4286 based on Foata normal form. 14/19056 useless extension candidates. Maximal degree in co-relation 134361. Up to 16858 conditions per place. [2024-06-21 21:15:59,908 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 153 selfloop transitions, 205 changer transitions 0/363 dead transitions. [2024-06-21 21:15:59,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 363 transitions, 5256 flow [2024-06-21 21:15:59,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:15:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:15:59,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-21 21:15:59,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793028322440087 [2024-06-21 21:15:59,910 INFO L175 Difference]: Start difference. First operand has 154 places, 295 transitions, 3831 flow. Second operand 9 states and 220 transitions. [2024-06-21 21:15:59,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 363 transitions, 5256 flow [2024-06-21 21:16:00,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 363 transitions, 4834 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 21:16:00,565 INFO L231 Difference]: Finished difference. Result has 157 places, 304 transitions, 4054 flow [2024-06-21 21:16:00,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3414, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4054, PETRI_PLACES=157, PETRI_TRANSITIONS=304} [2024-06-21 21:16:00,565 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 103 predicate places. [2024-06-21 21:16:00,566 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 304 transitions, 4054 flow [2024-06-21 21:16:00,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:00,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:00,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:00,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:16:00,566 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)] === [2024-06-21 21:16:00,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:00,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1501540995, now seen corresponding path program 4 times [2024-06-21 21:16:00,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:00,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153753726] [2024-06-21 21:16:00,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:00,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:01,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:01,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153753726] [2024-06-21 21:16:01,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153753726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:01,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:01,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:16:01,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538531656] [2024-06-21 21:16:01,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:01,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:16:01,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:01,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:16:01,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:16:02,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-21 21:16:02,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 304 transitions, 4054 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:02,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:02,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-21 21:16:02,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand