./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/thin002_rmo.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/thin002_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/thin002_rmo.i ./goblint.2024-06-19_11-23-25.files/protection/thin002_rmo.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:36:41,074 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:36:41,130 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:36:41,133 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:36:41,133 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:36:41,153 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:36:41,154 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:36:41,154 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:36:41,155 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:36:41,155 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:36:41,155 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:36:41,155 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:36:41,156 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:36:41,156 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:36:41,156 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:36:41,157 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:36:41,157 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:36:41,157 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:36:41,157 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:36:41,158 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:36:41,158 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:36:41,158 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:36:41,158 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:36:41,159 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:36:41,159 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:36:41,159 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:36:41,159 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:36:41,160 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:36:41,160 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:36:41,160 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:36:41,160 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:36:41,161 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:36:41,161 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:36:41,161 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:36:41,161 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:36:41,161 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:36:41,161 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:36:41,162 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:36:41,162 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:36:41,162 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:36:41,162 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:36:41,172 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:36:41,172 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:36:41,173 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:36:41,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:36:41,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:36:41,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:36:41,404 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:36:41,404 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:36:41,405 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/thin002_rmo.i [2024-06-27 21:36:42,367 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:36:42,593 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:36:42,594 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_rmo.i [2024-06-27 21:36:42,606 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c70581e39/1f6542b57d144dc2812e89264dd0377e/FLAG5c68bc285 [2024-06-27 21:36:42,619 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c70581e39/1f6542b57d144dc2812e89264dd0377e [2024-06-27 21:36:42,621 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:36:42,622 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:36:42,622 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/thin002_rmo.yml/witness.yml [2024-06-27 21:36:42,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:36:42,828 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:36:42,829 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:36:42,830 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:36:42,833 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:36:42,834 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:36:42" (1/2) ... [2024-06-27 21:36:42,834 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c768db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:36:42, skipping insertion in model container [2024-06-27 21:36:42,834 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:36:42" (1/2) ... [2024-06-27 21:36:42,835 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@f687ce0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:36:42, skipping insertion in model container [2024-06-27 21:36:42,836 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:36:42" (2/2) ... [2024-06-27 21:36:42,836 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c768db2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:42, skipping insertion in model container [2024-06-27 21:36:42,836 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:36:42" (2/2) ... [2024-06-27 21:36:42,836 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:36:42,999 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:36:43,001 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] (((((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || a$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$w_buff1 == 0)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & a && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || a$w_buff0_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$w_buff0 == 0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 21:36:43,001 INFO L97 edCorrectnessWitness]: Location invariant before [L868-L868] (((((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || a$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$w_buff1 == 0)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & a && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || a$w_buff0_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$w_buff0 == 0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 21:36:43,001 INFO L97 edCorrectnessWitness]: Location invariant before [L865-L865] (((((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || a$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$w_buff1 == 0)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & a && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || a$w_buff0_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$w_buff0 == 0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 21:36:43,001 INFO L97 edCorrectnessWitness]: Location invariant before [L863-L863] (((((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || a$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$w_buff1 == 0)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & a && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || a$w_buff0_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$w_buff0 == 0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 21:36:43,001 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:36:43,002 INFO L106 edCorrectnessWitness]: ghost_update [L861-L861] multithreaded = 1; [2024-06-27 21:36:43,039 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:36:43,309 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:36:43,325 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:36:43,481 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:36:43,509 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:36:43,509 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:43 WrapperNode [2024-06-27 21:36:43,509 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:36:43,510 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:36:43,511 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:36:43,511 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:36:43,518 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:43" (1/1) ... [2024-06-27 21:36:43,534 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:43" (1/1) ... [2024-06-27 21:36:43,583 INFO L138 Inliner]: procedures = 176, calls = 81, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 200 [2024-06-27 21:36:43,583 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:36:43,584 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:36:43,584 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:36:43,584 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:36:43,592 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:43" (1/1) ... [2024-06-27 21:36:43,593 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:43" (1/1) ... [2024-06-27 21:36:43,596 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:43" (1/1) ... [2024-06-27 21:36:43,627 INFO L175 MemorySlicer]: Split 31 memory accesses to 2 slices as follows [2, 29]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-27 21:36:43,628 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:43" (1/1) ... [2024-06-27 21:36:43,628 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:43" (1/1) ... [2024-06-27 21:36:43,644 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:43" (1/1) ... [2024-06-27 21:36:43,646 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:43" (1/1) ... [2024-06-27 21:36:43,648 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:43" (1/1) ... [2024-06-27 21:36:43,650 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:43" (1/1) ... [2024-06-27 21:36:43,669 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:36:43,670 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:36:43,670 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:36:43,670 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:36:43,671 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:43" (1/1) ... [2024-06-27 21:36:43,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:36:43,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:36:43,696 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 21:36:43,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 21:36:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:36:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:36:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:36:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:36:43,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:36:43,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:36:43,750 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:36:43,750 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:36:43,750 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:36:43,751 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:36:43,751 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:36:43,751 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:36:43,751 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 21:36:43,752 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 21:36:43,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:36:43,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:36:43,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:36:43,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:36:43,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:36:43,755 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:36:43,947 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:36:43,962 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:36:44,416 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:36:44,416 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:36:44,713 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:36:44,714 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:36:44,715 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:36:44 BoogieIcfgContainer [2024-06-27 21:36:44,715 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:36:44,718 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:36:44,718 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:36:44,720 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:36:44,720 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:36:42" (1/4) ... [2024-06-27 21:36:44,721 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39047424 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:36:44, skipping insertion in model container [2024-06-27 21:36:44,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:36:42" (2/4) ... [2024-06-27 21:36:44,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39047424 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:36:44, skipping insertion in model container [2024-06-27 21:36:44,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:43" (3/4) ... [2024-06-27 21:36:44,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39047424 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:36:44, skipping insertion in model container [2024-06-27 21:36:44,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:36:44" (4/4) ... [2024-06-27 21:36:44,723 INFO L112 eAbstractionObserver]: Analyzing ICFG thin002_rmo.i [2024-06-27 21:36:44,738 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:36:44,738 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 21:36:44,738 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:36:44,816 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:36:44,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-27 21:36:44,877 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-27 21:36:44,877 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:36:44,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 0/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:36:44,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-27 21:36:44,882 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-27 21:36:44,891 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:36:44,895 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;@2f7cf439, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:36:44,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 21:36:44,898 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:36:44,899 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:36:44,899 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:36:44,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:44,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:36:44,900 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:36:44,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:44,903 INFO L85 PathProgramCache]: Analyzing trace with hash 622140855, now seen corresponding path program 1 times [2024-06-27 21:36:44,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:44,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245736710] [2024-06-27 21:36:44,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:44,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:47,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:47,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245736710] [2024-06-27 21:36:47,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245736710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:47,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:47,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:36:47,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048125216] [2024-06-27 21:36:47,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:47,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:36:47,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:47,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:36:47,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:36:47,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-27 21:36:47,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:47,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:47,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-27 21:36:47,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:48,399 INFO L124 PetriNetUnfolderBase]: 4406/6336 cut-off events. [2024-06-27 21:36:48,399 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2024-06-27 21:36:48,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12682 conditions, 6336 events. 4406/6336 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 34815 event pairs, 3188 based on Foata normal form. 1/6202 useless extension candidates. Maximal degree in co-relation 12669. Up to 6114 conditions per place. [2024-06-27 21:36:48,432 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 45 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-06-27 21:36:48,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 61 transitions, 243 flow [2024-06-27 21:36:48,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:36:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:36:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-06-27 21:36:48,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 21:36:48,443 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 99 transitions. [2024-06-27 21:36:48,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 61 transitions, 243 flow [2024-06-27 21:36:48,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 236 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:36:48,447 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-27 21:36:48,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-27 21:36:48,451 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-27 21:36:48,451 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-27 21:36:48,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:48,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:48,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:48,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:36:48,452 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:36:48,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:48,453 INFO L85 PathProgramCache]: Analyzing trace with hash 877421238, now seen corresponding path program 1 times [2024-06-27 21:36:48,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:48,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966332803] [2024-06-27 21:36:48,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:48,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:50,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:50,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966332803] [2024-06-27 21:36:50,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966332803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:50,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:50,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:36:50,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835894780] [2024-06-27 21:36:50,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:50,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:36:50,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:50,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:36:50,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:36:50,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-27 21:36:50,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:50,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:50,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-27 21:36:50,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:52,280 INFO L124 PetriNetUnfolderBase]: 4396/6307 cut-off events. [2024-06-27 21:36:52,281 INFO L125 PetriNetUnfolderBase]: For 1199/1210 co-relation queries the response was YES. [2024-06-27 21:36:52,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14561 conditions, 6307 events. 4396/6307 cut-off events. For 1199/1210 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 34038 event pairs, 2767 based on Foata normal form. 10/6312 useless extension candidates. Maximal degree in co-relation 14549. Up to 6073 conditions per place. [2024-06-27 21:36:52,315 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 58 selfloop transitions, 9 changer transitions 0/78 dead transitions. [2024-06-27 21:36:52,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 78 transitions, 347 flow [2024-06-27 21:36:52,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:36:52,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:36:52,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-27 21:36:52,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064814814814815 [2024-06-27 21:36:52,320 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 131 transitions. [2024-06-27 21:36:52,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 78 transitions, 347 flow [2024-06-27 21:36:52,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:36:52,328 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-27 21:36:52,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-27 21:36:52,329 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-27 21:36:52,329 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-27 21:36:52,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:52,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:52,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:52,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:36:52,330 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:36:52,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:52,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1430256302, now seen corresponding path program 1 times [2024-06-27 21:36:52,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:52,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916500193] [2024-06-27 21:36:52,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:52,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:54,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:54,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:54,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916500193] [2024-06-27 21:36:54,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916500193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:54,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:54,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:36:54,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694328660] [2024-06-27 21:36:54,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:54,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:36:54,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:54,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:36:54,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:36:54,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-27 21:36:54,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:54,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:54,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-27 21:36:54,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:56,562 INFO L124 PetriNetUnfolderBase]: 5573/7932 cut-off events. [2024-06-27 21:36:56,562 INFO L125 PetriNetUnfolderBase]: For 4121/4139 co-relation queries the response was YES. [2024-06-27 21:36:56,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20459 conditions, 7932 events. 5573/7932 cut-off events. For 4121/4139 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 42829 event pairs, 2919 based on Foata normal form. 16/7944 useless extension candidates. Maximal degree in co-relation 20445. Up to 7638 conditions per place. [2024-06-27 21:36:56,594 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 80 selfloop transitions, 13 changer transitions 0/103 dead transitions. [2024-06-27 21:36:56,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 103 transitions, 523 flow [2024-06-27 21:36:56,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:36:56,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:36:56,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-27 21:36:56,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-27 21:36:56,596 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 5 states and 159 transitions. [2024-06-27 21:36:56,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 103 transitions, 523 flow [2024-06-27 21:36:56,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 103 transitions, 492 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 21:36:56,599 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 279 flow [2024-06-27 21:36:56,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=279, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2024-06-27 21:36:56,600 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2024-06-27 21:36:56,600 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 279 flow [2024-06-27 21:36:56,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:56,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:56,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:56,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:36:56,601 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:36:56,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:56,601 INFO L85 PathProgramCache]: Analyzing trace with hash -770263667, now seen corresponding path program 1 times [2024-06-27 21:36:56,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:56,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700709768] [2024-06-27 21:36:56,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:56,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:59,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:59,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700709768] [2024-06-27 21:36:59,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700709768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:59,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:59,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:36:59,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170355503] [2024-06-27 21:36:59,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:59,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:36:59,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:59,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:36:59,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:36:59,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-27 21:36:59,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 279 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:59,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:59,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-27 21:36:59,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:00,875 INFO L124 PetriNetUnfolderBase]: 5557/7912 cut-off events. [2024-06-27 21:37:00,876 INFO L125 PetriNetUnfolderBase]: For 7471/7516 co-relation queries the response was YES. [2024-06-27 21:37:00,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22651 conditions, 7912 events. 5557/7912 cut-off events. For 7471/7516 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 42858 event pairs, 2329 based on Foata normal form. 32/7940 useless extension candidates. Maximal degree in co-relation 22634. Up to 7560 conditions per place. [2024-06-27 21:37:00,909 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 89 selfloop transitions, 16 changer transitions 0/115 dead transitions. [2024-06-27 21:37:00,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 115 transitions, 621 flow [2024-06-27 21:37:00,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:37:00,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:37:00,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 21:37:00,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5709876543209876 [2024-06-27 21:37:00,912 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 279 flow. Second operand 6 states and 185 transitions. [2024-06-27 21:37:00,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 115 transitions, 621 flow [2024-06-27 21:37:00,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 115 transitions, 613 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 21:37:00,916 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 331 flow [2024-06-27 21:37:00,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2024-06-27 21:37:00,917 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 12 predicate places. [2024-06-27 21:37:00,917 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 331 flow [2024-06-27 21:37:00,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:00,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:00,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:00,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:37:00,918 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:00,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:00,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1632367062, now seen corresponding path program 1 times [2024-06-27 21:37:00,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:00,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877401115] [2024-06-27 21:37:00,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:00,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:03,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:03,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877401115] [2024-06-27 21:37:03,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877401115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:03,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:03,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:37:03,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694082637] [2024-06-27 21:37:03,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:03,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:37:03,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:03,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:37:03,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:37:03,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:37:03,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:03,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:03,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:37:03,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:05,355 INFO L124 PetriNetUnfolderBase]: 6976/9833 cut-off events. [2024-06-27 21:37:05,355 INFO L125 PetriNetUnfolderBase]: For 14047/14073 co-relation queries the response was YES. [2024-06-27 21:37:05,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29910 conditions, 9833 events. 6976/9833 cut-off events. For 14047/14073 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 52942 event pairs, 3445 based on Foata normal form. 13/9840 useless extension candidates. Maximal degree in co-relation 29889. Up to 9532 conditions per place. [2024-06-27 21:37:05,398 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 79 selfloop transitions, 12 changer transitions 0/99 dead transitions. [2024-06-27 21:37:05,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 99 transitions, 633 flow [2024-06-27 21:37:05,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:37:05,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:37:05,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-27 21:37:05,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-27 21:37:05,406 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 331 flow. Second operand 5 states and 129 transitions. [2024-06-27 21:37:05,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 99 transitions, 633 flow [2024-06-27 21:37:05,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 99 transitions, 585 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 21:37:05,414 INFO L231 Difference]: Finished difference. Result has 71 places, 76 transitions, 404 flow [2024-06-27 21:37:05,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=404, PETRI_PLACES=71, PETRI_TRANSITIONS=76} [2024-06-27 21:37:05,416 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 14 predicate places. [2024-06-27 21:37:05,416 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 76 transitions, 404 flow [2024-06-27 21:37:05,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:05,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:05,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:05,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:37:05,417 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:05,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:05,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1219131441, now seen corresponding path program 1 times [2024-06-27 21:37:05,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:05,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067775894] [2024-06-27 21:37:05,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:05,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:08,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:08,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067775894] [2024-06-27 21:37:08,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067775894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:08,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:08,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:37:08,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765328097] [2024-06-27 21:37:08,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:08,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:37:08,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:08,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:37:08,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:37:08,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-27 21:37:08,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 404 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:08,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:08,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-27 21:37:08,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:11,166 INFO L124 PetriNetUnfolderBase]: 6834/9676 cut-off events. [2024-06-27 21:37:11,166 INFO L125 PetriNetUnfolderBase]: For 21497/21647 co-relation queries the response was YES. [2024-06-27 21:37:11,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32970 conditions, 9676 events. 6834/9676 cut-off events. For 21497/21647 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 53378 event pairs, 3028 based on Foata normal form. 49/9692 useless extension candidates. Maximal degree in co-relation 32946. Up to 9201 conditions per place. [2024-06-27 21:37:11,212 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 91 selfloop transitions, 33 changer transitions 0/135 dead transitions. [2024-06-27 21:37:11,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 135 transitions, 870 flow [2024-06-27 21:37:11,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:37:11,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:37:11,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-27 21:37:11,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-27 21:37:11,214 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 404 flow. Second operand 7 states and 198 transitions. [2024-06-27 21:37:11,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 135 transitions, 870 flow [2024-06-27 21:37:11,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 135 transitions, 858 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-27 21:37:11,223 INFO L231 Difference]: Finished difference. Result has 77 places, 84 transitions, 541 flow [2024-06-27 21:37:11,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=541, PETRI_PLACES=77, PETRI_TRANSITIONS=84} [2024-06-27 21:37:11,224 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 20 predicate places. [2024-06-27 21:37:11,224 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 84 transitions, 541 flow [2024-06-27 21:37:11,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:11,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:11,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:11,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:37:11,240 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:11,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:11,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1503587489, now seen corresponding path program 1 times [2024-06-27 21:37:11,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:11,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251229895] [2024-06-27 21:37:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:11,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:14,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:14,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251229895] [2024-06-27 21:37:14,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251229895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:14,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:14,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:37:14,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527520126] [2024-06-27 21:37:14,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:14,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:37:14,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:14,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:37:14,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:37:14,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:37:14,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 541 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:14,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:14,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:37:14,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:16,962 INFO L124 PetriNetUnfolderBase]: 7076/9993 cut-off events. [2024-06-27 21:37:16,962 INFO L125 PetriNetUnfolderBase]: For 28215/28263 co-relation queries the response was YES. [2024-06-27 21:37:16,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35609 conditions, 9993 events. 7076/9993 cut-off events. For 28215/28263 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 54093 event pairs, 3210 based on Foata normal form. 26/10010 useless extension candidates. Maximal degree in co-relation 35582. Up to 9552 conditions per place. [2024-06-27 21:37:17,020 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 114 selfloop transitions, 28 changer transitions 0/150 dead transitions. [2024-06-27 21:37:17,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 150 transitions, 1104 flow [2024-06-27 21:37:17,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:37:17,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:37:17,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-27 21:37:17,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 21:37:17,022 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 541 flow. Second operand 7 states and 189 transitions. [2024-06-27 21:37:17,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 150 transitions, 1104 flow [2024-06-27 21:37:17,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 150 transitions, 1046 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 21:37:17,048 INFO L231 Difference]: Finished difference. Result has 83 places, 101 transitions, 706 flow [2024-06-27 21:37:17,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=706, PETRI_PLACES=83, PETRI_TRANSITIONS=101} [2024-06-27 21:37:17,049 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 26 predicate places. [2024-06-27 21:37:17,049 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 101 transitions, 706 flow [2024-06-27 21:37:17,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:17,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:17,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:17,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:37:17,050 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:17,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:17,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1503587675, now seen corresponding path program 2 times [2024-06-27 21:37:17,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:17,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948650863] [2024-06-27 21:37:17,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:17,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:20,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:20,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948650863] [2024-06-27 21:37:20,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948650863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:20,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:20,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:37:20,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520648496] [2024-06-27 21:37:20,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:20,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:37:20,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:20,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:37:20,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:37:20,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-27 21:37:20,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 101 transitions, 706 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:20,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:20,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-27 21:37:20,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:23,043 INFO L124 PetriNetUnfolderBase]: 6817/9695 cut-off events. [2024-06-27 21:37:23,044 INFO L125 PetriNetUnfolderBase]: For 40399/40993 co-relation queries the response was YES. [2024-06-27 21:37:23,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38061 conditions, 9695 events. 6817/9695 cut-off events. For 40399/40993 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 54207 event pairs, 2900 based on Foata normal form. 47/9466 useless extension candidates. Maximal degree in co-relation 38030. Up to 9156 conditions per place. [2024-06-27 21:37:23,096 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 101 selfloop transitions, 38 changer transitions 0/153 dead transitions. [2024-06-27 21:37:23,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 153 transitions, 1164 flow [2024-06-27 21:37:23,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:37:23,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:37:23,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-27 21:37:23,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-27 21:37:23,099 INFO L175 Difference]: Start difference. First operand has 83 places, 101 transitions, 706 flow. Second operand 7 states and 190 transitions. [2024-06-27 21:37:23,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 153 transitions, 1164 flow [2024-06-27 21:37:23,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 153 transitions, 1114 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 21:37:23,124 INFO L231 Difference]: Finished difference. Result has 87 places, 109 transitions, 824 flow [2024-06-27 21:37:23,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=824, PETRI_PLACES=87, PETRI_TRANSITIONS=109} [2024-06-27 21:37:23,125 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 30 predicate places. [2024-06-27 21:37:23,125 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 109 transitions, 824 flow [2024-06-27 21:37:23,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:23,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:23,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:23,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:37:23,126 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:23,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:23,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1035090343, now seen corresponding path program 2 times [2024-06-27 21:37:23,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:23,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703411532] [2024-06-27 21:37:23,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:23,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:23,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:26,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:26,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703411532] [2024-06-27 21:37:26,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703411532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:26,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:26,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:37:26,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230287376] [2024-06-27 21:37:26,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:26,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:37:26,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:26,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:37:26,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:37:26,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:37:26,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 109 transitions, 824 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:26,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:26,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:37:26,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:28,360 INFO L124 PetriNetUnfolderBase]: 7168/10138 cut-off events. [2024-06-27 21:37:28,361 INFO L125 PetriNetUnfolderBase]: For 42360/42691 co-relation queries the response was YES. [2024-06-27 21:37:28,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39417 conditions, 10138 events. 7168/10138 cut-off events. For 42360/42691 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 54960 event pairs, 3232 based on Foata normal form. 65/10185 useless extension candidates. Maximal degree in co-relation 39385. Up to 9667 conditions per place. [2024-06-27 21:37:28,415 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 110 selfloop transitions, 32 changer transitions 0/150 dead transitions. [2024-06-27 21:37:28,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 150 transitions, 1293 flow [2024-06-27 21:37:28,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:37:28,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:37:28,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-27 21:37:28,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2024-06-27 21:37:28,417 INFO L175 Difference]: Start difference. First operand has 87 places, 109 transitions, 824 flow. Second operand 6 states and 159 transitions. [2024-06-27 21:37:28,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 150 transitions, 1293 flow [2024-06-27 21:37:28,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 150 transitions, 1191 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 21:37:28,447 INFO L231 Difference]: Finished difference. Result has 90 places, 115 transitions, 864 flow [2024-06-27 21:37:28,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=864, PETRI_PLACES=90, PETRI_TRANSITIONS=115} [2024-06-27 21:37:28,448 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 33 predicate places. [2024-06-27 21:37:28,448 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 115 transitions, 864 flow [2024-06-27 21:37:28,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:28,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:28,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:28,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:37:28,449 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:28,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:28,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1034853193, now seen corresponding path program 3 times [2024-06-27 21:37:28,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:28,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293110029] [2024-06-27 21:37:28,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:28,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:31,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:31,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293110029] [2024-06-27 21:37:31,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293110029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:31,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:31,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:37:31,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880581055] [2024-06-27 21:37:31,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:31,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:37:31,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:31,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:37:31,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:37:31,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:37:31,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 115 transitions, 864 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:31,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:31,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:37:31,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:33,473 INFO L124 PetriNetUnfolderBase]: 7159/10115 cut-off events. [2024-06-27 21:37:33,474 INFO L125 PetriNetUnfolderBase]: For 46932/47012 co-relation queries the response was YES. [2024-06-27 21:37:33,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40084 conditions, 10115 events. 7159/10115 cut-off events. For 46932/47012 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 54637 event pairs, 3210 based on Foata normal form. 42/10148 useless extension candidates. Maximal degree in co-relation 40050. Up to 9658 conditions per place. [2024-06-27 21:37:33,521 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 110 selfloop transitions, 33 changer transitions 0/151 dead transitions. [2024-06-27 21:37:33,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 151 transitions, 1241 flow [2024-06-27 21:37:33,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:37:33,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:37:33,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-27 21:37:33,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49691358024691357 [2024-06-27 21:37:33,523 INFO L175 Difference]: Start difference. First operand has 90 places, 115 transitions, 864 flow. Second operand 6 states and 161 transitions. [2024-06-27 21:37:33,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 151 transitions, 1241 flow [2024-06-27 21:37:33,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 151 transitions, 1180 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 21:37:33,567 INFO L231 Difference]: Finished difference. Result has 94 places, 115 transitions, 885 flow [2024-06-27 21:37:33,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=885, PETRI_PLACES=94, PETRI_TRANSITIONS=115} [2024-06-27 21:37:33,567 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 37 predicate places. [2024-06-27 21:37:33,568 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 115 transitions, 885 flow [2024-06-27 21:37:33,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:33,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:33,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:33,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:37:33,568 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:33,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:33,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1154859995, now seen corresponding path program 3 times [2024-06-27 21:37:33,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:33,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972814784] [2024-06-27 21:37:33,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:33,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:36,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:36,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972814784] [2024-06-27 21:37:36,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972814784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:36,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:36,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:37:36,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693593205] [2024-06-27 21:37:36,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:36,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:37:36,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:36,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:37:36,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:37:36,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-27 21:37:36,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 115 transitions, 885 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:36,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:36,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-27 21:37:36,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:38,685 INFO L124 PetriNetUnfolderBase]: 6834/9726 cut-off events. [2024-06-27 21:37:38,685 INFO L125 PetriNetUnfolderBase]: For 57941/58507 co-relation queries the response was YES. [2024-06-27 21:37:38,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40369 conditions, 9726 events. 6834/9726 cut-off events. For 57941/58507 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 54459 event pairs, 2900 based on Foata normal form. 76/9528 useless extension candidates. Maximal degree in co-relation 40333. Up to 9113 conditions per place. [2024-06-27 21:37:38,749 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 93 selfloop transitions, 45 changer transitions 0/154 dead transitions. [2024-06-27 21:37:38,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 154 transitions, 1257 flow [2024-06-27 21:37:38,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:37:38,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:37:38,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-27 21:37:38,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216049382716049 [2024-06-27 21:37:38,751 INFO L175 Difference]: Start difference. First operand has 94 places, 115 transitions, 885 flow. Second operand 6 states and 169 transitions. [2024-06-27 21:37:38,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 154 transitions, 1257 flow [2024-06-27 21:37:38,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 154 transitions, 1174 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:37:38,806 INFO L231 Difference]: Finished difference. Result has 95 places, 115 transitions, 916 flow [2024-06-27 21:37:38,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=916, PETRI_PLACES=95, PETRI_TRANSITIONS=115} [2024-06-27 21:37:38,807 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2024-06-27 21:37:38,807 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 115 transitions, 916 flow [2024-06-27 21:37:38,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:38,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:38,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:38,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:37:38,808 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:38,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:38,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1035099271, now seen corresponding path program 1 times [2024-06-27 21:37:38,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:38,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738260301] [2024-06-27 21:37:38,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:38,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:38,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:41,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:41,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738260301] [2024-06-27 21:37:41,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738260301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:41,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:41,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:37:41,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230885408] [2024-06-27 21:37:41,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:41,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:37:41,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:41,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:37:41,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:37:41,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:37:41,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 115 transitions, 916 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:41,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:41,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:37:41,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:43,563 INFO L124 PetriNetUnfolderBase]: 7128/10076 cut-off events. [2024-06-27 21:37:43,588 INFO L125 PetriNetUnfolderBase]: For 54284/54375 co-relation queries the response was YES. [2024-06-27 21:37:43,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40728 conditions, 10076 events. 7128/10076 cut-off events. For 54284/54375 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 54544 event pairs, 3074 based on Foata normal form. 35/10105 useless extension candidates. Maximal degree in co-relation 40692. Up to 9700 conditions per place. [2024-06-27 21:37:43,649 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 128 selfloop transitions, 15 changer transitions 0/151 dead transitions. [2024-06-27 21:37:43,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 151 transitions, 1311 flow [2024-06-27 21:37:43,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:37:43,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:37:43,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-27 21:37:43,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2024-06-27 21:37:43,651 INFO L175 Difference]: Start difference. First operand has 95 places, 115 transitions, 916 flow. Second operand 6 states and 154 transitions. [2024-06-27 21:37:43,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 151 transitions, 1311 flow [2024-06-27 21:37:43,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 151 transitions, 1215 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 21:37:43,709 INFO L231 Difference]: Finished difference. Result has 96 places, 118 transitions, 892 flow [2024-06-27 21:37:43,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=892, PETRI_PLACES=96, PETRI_TRANSITIONS=118} [2024-06-27 21:37:43,710 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 39 predicate places. [2024-06-27 21:37:43,710 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 118 transitions, 892 flow [2024-06-27 21:37:43,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:43,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:43,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:43,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:37:43,711 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:43,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:43,711 INFO L85 PathProgramCache]: Analyzing trace with hash 861632519, now seen corresponding path program 1 times [2024-06-27 21:37:43,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:43,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646224012] [2024-06-27 21:37:43,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:43,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:47,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:47,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646224012] [2024-06-27 21:37:47,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646224012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:47,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:47,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:47,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205588945] [2024-06-27 21:37:47,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:47,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:47,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:47,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:47,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:47,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:37:47,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 118 transitions, 892 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:47,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:47,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:37:47,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:49,897 INFO L124 PetriNetUnfolderBase]: 7155/10121 cut-off events. [2024-06-27 21:37:49,897 INFO L125 PetriNetUnfolderBase]: For 55772/55849 co-relation queries the response was YES. [2024-06-27 21:37:49,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41916 conditions, 10121 events. 7155/10121 cut-off events. For 55772/55849 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 54714 event pairs, 3023 based on Foata normal form. 41/10154 useless extension candidates. Maximal degree in co-relation 41879. Up to 9488 conditions per place. [2024-06-27 21:37:49,949 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 142 selfloop transitions, 50 changer transitions 0/200 dead transitions. [2024-06-27 21:37:49,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 200 transitions, 1653 flow [2024-06-27 21:37:49,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:49,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:49,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-27 21:37:49,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5092592592592593 [2024-06-27 21:37:49,952 INFO L175 Difference]: Start difference. First operand has 96 places, 118 transitions, 892 flow. Second operand 8 states and 220 transitions. [2024-06-27 21:37:49,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 200 transitions, 1653 flow [2024-06-27 21:37:49,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 200 transitions, 1607 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:37:50,004 INFO L231 Difference]: Finished difference. Result has 102 places, 137 transitions, 1159 flow [2024-06-27 21:37:50,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1159, PETRI_PLACES=102, PETRI_TRANSITIONS=137} [2024-06-27 21:37:50,006 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 45 predicate places. [2024-06-27 21:37:50,006 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 137 transitions, 1159 flow [2024-06-27 21:37:50,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:50,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:50,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:50,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:37:50,007 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:50,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:50,007 INFO L85 PathProgramCache]: Analyzing trace with hash 633429437, now seen corresponding path program 2 times [2024-06-27 21:37:50,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:50,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243276657] [2024-06-27 21:37:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:50,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:53,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:53,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243276657] [2024-06-27 21:37:53,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243276657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:53,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:53,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:53,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035468341] [2024-06-27 21:37:53,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:53,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:53,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:53,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:53,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:53,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:37:53,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 137 transitions, 1159 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:53,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:53,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:37:53,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:56,227 INFO L124 PetriNetUnfolderBase]: 7218/10227 cut-off events. [2024-06-27 21:37:56,228 INFO L125 PetriNetUnfolderBase]: For 68855/68930 co-relation queries the response was YES. [2024-06-27 21:37:56,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45233 conditions, 10227 events. 7218/10227 cut-off events. For 68855/68930 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 55490 event pairs, 3023 based on Foata normal form. 41/10260 useless extension candidates. Maximal degree in co-relation 45193. Up to 9679 conditions per place. [2024-06-27 21:37:56,288 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 169 selfloop transitions, 45 changer transitions 0/222 dead transitions. [2024-06-27 21:37:56,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 222 transitions, 1950 flow [2024-06-27 21:37:56,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:37:56,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:37:56,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 264 transitions. [2024-06-27 21:37:56,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-27 21:37:56,290 INFO L175 Difference]: Start difference. First operand has 102 places, 137 transitions, 1159 flow. Second operand 10 states and 264 transitions. [2024-06-27 21:37:56,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 222 transitions, 1950 flow [2024-06-27 21:37:56,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 222 transitions, 1863 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 21:37:56,353 INFO L231 Difference]: Finished difference. Result has 110 places, 147 transitions, 1300 flow [2024-06-27 21:37:56,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1300, PETRI_PLACES=110, PETRI_TRANSITIONS=147} [2024-06-27 21:37:56,354 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 53 predicate places. [2024-06-27 21:37:56,354 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 147 transitions, 1300 flow [2024-06-27 21:37:56,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:56,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:56,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:56,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:37:56,355 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:56,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:56,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1862159623, now seen corresponding path program 3 times [2024-06-27 21:37:56,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:56,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943376040] [2024-06-27 21:37:56,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:56,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:59,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:59,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943376040] [2024-06-27 21:37:59,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943376040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:59,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:59,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:59,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742534885] [2024-06-27 21:37:59,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:59,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:59,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:59,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:59,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:59,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:37:59,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 147 transitions, 1300 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:59,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:59,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:37:59,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:02,434 INFO L124 PetriNetUnfolderBase]: 7209/10215 cut-off events. [2024-06-27 21:38:02,434 INFO L125 PetriNetUnfolderBase]: For 76721/76796 co-relation queries the response was YES. [2024-06-27 21:38:02,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46093 conditions, 10215 events. 7209/10215 cut-off events. For 76721/76796 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 55459 event pairs, 3023 based on Foata normal form. 41/10248 useless extension candidates. Maximal degree in co-relation 46050. Up to 9670 conditions per place. [2024-06-27 21:38:02,500 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 149 selfloop transitions, 44 changer transitions 0/201 dead transitions. [2024-06-27 21:38:02,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 201 transitions, 1821 flow [2024-06-27 21:38:02,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:02,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:02,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-27 21:38:02,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930555555555556 [2024-06-27 21:38:02,502 INFO L175 Difference]: Start difference. First operand has 110 places, 147 transitions, 1300 flow. Second operand 8 states and 213 transitions. [2024-06-27 21:38:02,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 201 transitions, 1821 flow [2024-06-27 21:38:02,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 201 transitions, 1736 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 21:38:02,577 INFO L231 Difference]: Finished difference. Result has 113 places, 147 transitions, 1314 flow [2024-06-27 21:38:02,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1314, PETRI_PLACES=113, PETRI_TRANSITIONS=147} [2024-06-27 21:38:02,578 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 56 predicate places. [2024-06-27 21:38:02,578 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 147 transitions, 1314 flow [2024-06-27 21:38:02,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:02,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:02,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:02,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:38:02,578 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:38:02,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:02,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1440919951, now seen corresponding path program 4 times [2024-06-27 21:38:02,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:02,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008387776] [2024-06-27 21:38:02,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:02,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:02,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:06,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:06,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008387776] [2024-06-27 21:38:06,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008387776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:06,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:06,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:06,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290442222] [2024-06-27 21:38:06,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:06,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:06,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:06,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:06,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:06,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:38:06,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 147 transitions, 1314 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:06,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:06,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:38:06,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:09,018 INFO L124 PetriNetUnfolderBase]: 7236/10262 cut-off events. [2024-06-27 21:38:09,018 INFO L125 PetriNetUnfolderBase]: For 85491/85566 co-relation queries the response was YES. [2024-06-27 21:38:09,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47212 conditions, 10262 events. 7236/10262 cut-off events. For 85491/85566 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 55823 event pairs, 3023 based on Foata normal form. 41/10295 useless extension candidates. Maximal degree in co-relation 47167. Up to 9610 conditions per place. [2024-06-27 21:38:09,081 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 139 selfloop transitions, 57 changer transitions 0/204 dead transitions. [2024-06-27 21:38:09,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 204 transitions, 1970 flow [2024-06-27 21:38:09,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:38:09,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:38:09,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-27 21:38:09,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-27 21:38:09,083 INFO L175 Difference]: Start difference. First operand has 113 places, 147 transitions, 1314 flow. Second operand 7 states and 195 transitions. [2024-06-27 21:38:09,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 204 transitions, 1970 flow [2024-06-27 21:38:09,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 204 transitions, 1882 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:38:09,171 INFO L231 Difference]: Finished difference. Result has 114 places, 152 transitions, 1439 flow [2024-06-27 21:38:09,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1439, PETRI_PLACES=114, PETRI_TRANSITIONS=152} [2024-06-27 21:38:09,172 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 57 predicate places. [2024-06-27 21:38:09,172 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 152 transitions, 1439 flow [2024-06-27 21:38:09,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:09,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:09,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:09,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:38:09,173 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:38:09,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:09,173 INFO L85 PathProgramCache]: Analyzing trace with hash 2015679251, now seen corresponding path program 5 times [2024-06-27 21:38:09,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:09,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436310946] [2024-06-27 21:38:09,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:09,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:12,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:12,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436310946] [2024-06-27 21:38:12,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436310946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:12,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:12,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:12,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746358863] [2024-06-27 21:38:12,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:12,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:12,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:12,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:12,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:12,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:38:12,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 152 transitions, 1439 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:12,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:12,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:38:12,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:15,633 INFO L124 PetriNetUnfolderBase]: 7263/10309 cut-off events. [2024-06-27 21:38:15,633 INFO L125 PetriNetUnfolderBase]: For 95777/95853 co-relation queries the response was YES. [2024-06-27 21:38:15,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48545 conditions, 10309 events. 7263/10309 cut-off events. For 95777/95853 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 56130 event pairs, 3023 based on Foata normal form. 41/10342 useless extension candidates. Maximal degree in co-relation 48498. Up to 9638 conditions per place. [2024-06-27 21:38:15,702 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 155 selfloop transitions, 63 changer transitions 0/226 dead transitions. [2024-06-27 21:38:15,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 226 transitions, 2194 flow [2024-06-27 21:38:15,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:15,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:15,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-06-27 21:38:15,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041152263374485 [2024-06-27 21:38:15,704 INFO L175 Difference]: Start difference. First operand has 114 places, 152 transitions, 1439 flow. Second operand 9 states and 245 transitions. [2024-06-27 21:38:15,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 226 transitions, 2194 flow [2024-06-27 21:38:15,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 226 transitions, 2037 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:15,832 INFO L231 Difference]: Finished difference. Result has 117 places, 156 transitions, 1492 flow [2024-06-27 21:38:15,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1296, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1492, PETRI_PLACES=117, PETRI_TRANSITIONS=156} [2024-06-27 21:38:15,833 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 60 predicate places. [2024-06-27 21:38:15,833 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 156 transitions, 1492 flow [2024-06-27 21:38:15,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:15,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:15,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:15,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:38:15,834 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:38:15,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:15,834 INFO L85 PathProgramCache]: Analyzing trace with hash 2023030901, now seen corresponding path program 6 times [2024-06-27 21:38:15,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:15,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353793201] [2024-06-27 21:38:15,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:15,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:18,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:18,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:18,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353793201] [2024-06-27 21:38:18,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353793201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:18,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:18,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:18,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216392971] [2024-06-27 21:38:18,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:18,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:18,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:18,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:18,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:18,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:38:18,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 156 transitions, 1492 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:18,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:18,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:38:18,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:21,828 INFO L124 PetriNetUnfolderBase]: 7254/10309 cut-off events. [2024-06-27 21:38:21,828 INFO L125 PetriNetUnfolderBase]: For 97155/97809 co-relation queries the response was YES. [2024-06-27 21:38:21,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48446 conditions, 10309 events. 7254/10309 cut-off events. For 97155/97809 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 56181 event pairs, 3055 based on Foata normal form. 155/10446 useless extension candidates. Maximal degree in co-relation 48399. Up to 9629 conditions per place. [2024-06-27 21:38:21,900 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 149 selfloop transitions, 63 changer transitions 0/220 dead transitions. [2024-06-27 21:38:21,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 220 transitions, 2085 flow [2024-06-27 21:38:21,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:21,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:21,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-27 21:38:21,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48559670781893005 [2024-06-27 21:38:21,912 INFO L175 Difference]: Start difference. First operand has 117 places, 156 transitions, 1492 flow. Second operand 9 states and 236 transitions. [2024-06-27 21:38:21,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 220 transitions, 2085 flow [2024-06-27 21:38:22,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 220 transitions, 1908 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-27 21:38:22,076 INFO L231 Difference]: Finished difference. Result has 118 places, 157 transitions, 1464 flow [2024-06-27 21:38:22,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1464, PETRI_PLACES=118, PETRI_TRANSITIONS=157} [2024-06-27 21:38:22,079 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 61 predicate places. [2024-06-27 21:38:22,079 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 157 transitions, 1464 flow [2024-06-27 21:38:22,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:22,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:22,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:22,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:38:22,080 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:38:22,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:22,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1117076002, now seen corresponding path program 1 times [2024-06-27 21:38:22,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:22,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135094177] [2024-06-27 21:38:22,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:22,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:24,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:24,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135094177] [2024-06-27 21:38:24,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135094177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:24,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:24,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:24,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766942545] [2024-06-27 21:38:24,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:24,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:24,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:24,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:24,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:24,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-27 21:38:24,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 157 transitions, 1464 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:24,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:24,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-27 21:38:24,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:28,234 INFO L124 PetriNetUnfolderBase]: 8622/12258 cut-off events. [2024-06-27 21:38:28,234 INFO L125 PetriNetUnfolderBase]: For 128243/128603 co-relation queries the response was YES. [2024-06-27 21:38:28,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60117 conditions, 12258 events. 8622/12258 cut-off events. For 128243/128603 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 69637 event pairs, 2902 based on Foata normal form. 104/11976 useless extension candidates. Maximal degree in co-relation 60070. Up to 10083 conditions per place. [2024-06-27 21:38:28,317 INFO L140 encePairwiseOnDemand]: 38/54 looper letters, 178 selfloop transitions, 147 changer transitions 0/351 dead transitions. [2024-06-27 21:38:28,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 351 transitions, 3584 flow [2024-06-27 21:38:28,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:38:28,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:38:28,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 329 transitions. [2024-06-27 21:38:28,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5077160493827161 [2024-06-27 21:38:28,319 INFO L175 Difference]: Start difference. First operand has 118 places, 157 transitions, 1464 flow. Second operand 12 states and 329 transitions. [2024-06-27 21:38:28,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 351 transitions, 3584 flow [2024-06-27 21:38:28,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 351 transitions, 3390 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 21:38:28,486 INFO L231 Difference]: Finished difference. Result has 129 places, 251 transitions, 2719 flow [2024-06-27 21:38:28,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1322, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2719, PETRI_PLACES=129, PETRI_TRANSITIONS=251} [2024-06-27 21:38:28,487 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 72 predicate places. [2024-06-27 21:38:28,487 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 251 transitions, 2719 flow [2024-06-27 21:38:28,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:28,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:28,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:28,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:38:28,488 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:38:28,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:28,488 INFO L85 PathProgramCache]: Analyzing trace with hash 937943950, now seen corresponding path program 2 times [2024-06-27 21:38:28,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:28,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491665486] [2024-06-27 21:38:28,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:28,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:32,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:32,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491665486] [2024-06-27 21:38:32,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491665486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:32,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:32,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:32,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904982466] [2024-06-27 21:38:32,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:32,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:32,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:32,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:32,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:32,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-27 21:38:32,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 251 transitions, 2719 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:32,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:32,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-27 21:38:32,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:35,046 INFO L124 PetriNetUnfolderBase]: 8626/12279 cut-off events. [2024-06-27 21:38:35,046 INFO L125 PetriNetUnfolderBase]: For 157466/157984 co-relation queries the response was YES. [2024-06-27 21:38:35,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68102 conditions, 12279 events. 8626/12279 cut-off events. For 157466/157984 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 70017 event pairs, 2311 based on Foata normal form. 146/12037 useless extension candidates. Maximal degree in co-relation 68048. Up to 10599 conditions per place. [2024-06-27 21:38:35,148 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 153 selfloop transitions, 145 changer transitions 0/324 dead transitions. [2024-06-27 21:38:35,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 324 transitions, 3731 flow [2024-06-27 21:38:35,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:35,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:35,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-27 21:38:35,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 21:38:35,150 INFO L175 Difference]: Start difference. First operand has 129 places, 251 transitions, 2719 flow. Second operand 8 states and 225 transitions. [2024-06-27 21:38:35,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 324 transitions, 3731 flow [2024-06-27 21:38:35,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 324 transitions, 3696 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 21:38:35,473 INFO L231 Difference]: Finished difference. Result has 136 places, 261 transitions, 3175 flow [2024-06-27 21:38:35,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2684, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3175, PETRI_PLACES=136, PETRI_TRANSITIONS=261} [2024-06-27 21:38:35,473 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 79 predicate places. [2024-06-27 21:38:35,473 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 261 transitions, 3175 flow [2024-06-27 21:38:35,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:35,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:35,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:35,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:38:35,474 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)] === [2024-06-27 21:38:35,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:35,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1953991486, now seen corresponding path program 3 times [2024-06-27 21:38:35,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:35,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809266250] [2024-06-27 21:38:35,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:35,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:38,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:38,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809266250] [2024-06-27 21:38:38,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809266250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:38,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:38,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:38,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075848345] [2024-06-27 21:38:38,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:38,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:38,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:38,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:38,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:38,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-27 21:38:38,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 261 transitions, 3175 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:38,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:38,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-27 21:38:38,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:42,081 INFO L124 PetriNetUnfolderBase]: 8696/12390 cut-off events. [2024-06-27 21:38:42,082 INFO L125 PetriNetUnfolderBase]: For 186995/187599 co-relation queries the response was YES. [2024-06-27 21:38:42,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72294 conditions, 12390 events. 8696/12390 cut-off events. For 186995/187599 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 70721 event pairs, 2791 based on Foata normal form. 143/12134 useless extension candidates. Maximal degree in co-relation 72237. Up to 11061 conditions per place. [2024-06-27 21:38:42,196 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 164 selfloop transitions, 137 changer transitions 0/327 dead transitions. [2024-06-27 21:38:42,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 327 transitions, 4052 flow [2024-06-27 21:38:42,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:42,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-27 21:38:42,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115740740740741 [2024-06-27 21:38:42,198 INFO L175 Difference]: Start difference. First operand has 136 places, 261 transitions, 3175 flow. Second operand 8 states and 221 transitions. [2024-06-27 21:38:42,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 327 transitions, 4052 flow [2024-06-27 21:38:42,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 327 transitions, 3841 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 21:38:42,604 INFO L231 Difference]: Finished difference. Result has 140 places, 266 transitions, 3350 flow [2024-06-27 21:38:42,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2974, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3350, PETRI_PLACES=140, PETRI_TRANSITIONS=266} [2024-06-27 21:38:42,604 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 83 predicate places. [2024-06-27 21:38:42,604 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 266 transitions, 3350 flow [2024-06-27 21:38:42,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:42,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:42,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:42,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:38:42,605 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:38:42,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:42,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1056092080, now seen corresponding path program 4 times [2024-06-27 21:38:42,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:42,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030173535] [2024-06-27 21:38:42,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:42,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:45,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:45,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030173535] [2024-06-27 21:38:45,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030173535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:45,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:45,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:45,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194811079] [2024-06-27 21:38:45,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:45,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:45,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:45,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:45,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:46,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-27 21:38:46,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 266 transitions, 3350 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:46,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:46,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-27 21:38:46,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:49,103 INFO L124 PetriNetUnfolderBase]: 8814/12560 cut-off events. [2024-06-27 21:38:49,103 INFO L125 PetriNetUnfolderBase]: For 202809/203378 co-relation queries the response was YES. [2024-06-27 21:38:49,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74775 conditions, 12560 events. 8814/12560 cut-off events. For 202809/203378 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 71956 event pairs, 2797 based on Foata normal form. 134/12284 useless extension candidates. Maximal degree in co-relation 74716. Up to 11436 conditions per place. [2024-06-27 21:38:49,200 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 225 selfloop transitions, 80 changer transitions 0/331 dead transitions. [2024-06-27 21:38:49,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 331 transitions, 4239 flow [2024-06-27 21:38:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:49,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:49,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-27 21:38:49,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 21:38:49,202 INFO L175 Difference]: Start difference. First operand has 140 places, 266 transitions, 3350 flow. Second operand 8 states and 216 transitions. [2024-06-27 21:38:49,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 331 transitions, 4239 flow [2024-06-27 21:38:49,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 331 transitions, 3932 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:49,590 INFO L231 Difference]: Finished difference. Result has 142 places, 271 transitions, 3315 flow [2024-06-27 21:38:49,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3043, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3315, PETRI_PLACES=142, PETRI_TRANSITIONS=271} [2024-06-27 21:38:49,591 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 85 predicate places. [2024-06-27 21:38:49,591 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 271 transitions, 3315 flow [2024-06-27 21:38:49,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:49,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:49,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:49,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:38:49,592 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:38:49,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:49,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1056276778, now seen corresponding path program 1 times [2024-06-27 21:38:49,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:49,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938418353] [2024-06-27 21:38:49,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:49,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:52,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:52,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938418353] [2024-06-27 21:38:52,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938418353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:52,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:52,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:52,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027492136] [2024-06-27 21:38:52,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:52,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:52,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:52,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:52,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:53,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:38:53,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 271 transitions, 3315 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:53,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:53,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:38:53,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:56,334 INFO L124 PetriNetUnfolderBase]: 9376/13263 cut-off events. [2024-06-27 21:38:56,335 INFO L125 PetriNetUnfolderBase]: For 196082/196375 co-relation queries the response was YES. [2024-06-27 21:38:56,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76078 conditions, 13263 events. 9376/13263 cut-off events. For 196082/196375 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 74160 event pairs, 3131 based on Foata normal form. 99/13342 useless extension candidates. Maximal degree in co-relation 76018. Up to 12576 conditions per place. [2024-06-27 21:38:56,442 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 282 selfloop transitions, 43 changer transitions 0/333 dead transitions. [2024-06-27 21:38:56,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 333 transitions, 4190 flow [2024-06-27 21:38:56,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:56,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:56,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-27 21:38:56,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48842592592592593 [2024-06-27 21:38:56,444 INFO L175 Difference]: Start difference. First operand has 142 places, 271 transitions, 3315 flow. Second operand 8 states and 211 transitions. [2024-06-27 21:38:56,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 333 transitions, 4190 flow [2024-06-27 21:38:56,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 333 transitions, 3997 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:56,909 INFO L231 Difference]: Finished difference. Result has 144 places, 274 transitions, 3262 flow [2024-06-27 21:38:56,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3122, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3262, PETRI_PLACES=144, PETRI_TRANSITIONS=274} [2024-06-27 21:38:56,909 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 87 predicate places. [2024-06-27 21:38:56,910 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 274 transitions, 3262 flow [2024-06-27 21:38:56,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:56,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:56,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:56,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:38:56,910 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:38:56,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:56,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1938629042, now seen corresponding path program 5 times [2024-06-27 21:38:56,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:56,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903769253] [2024-06-27 21:38:56,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:56,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:00,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:00,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903769253] [2024-06-27 21:39:00,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903769253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:00,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:00,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:00,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072155046] [2024-06-27 21:39:00,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:00,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:00,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:00,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:00,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:00,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-27 21:39:00,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 274 transitions, 3262 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:00,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:00,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-27 21:39:00,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:03,546 INFO L124 PetriNetUnfolderBase]: 8817/12572 cut-off events. [2024-06-27 21:39:03,547 INFO L125 PetriNetUnfolderBase]: For 235570/236295 co-relation queries the response was YES. [2024-06-27 21:39:03,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76105 conditions, 12572 events. 8817/12572 cut-off events. For 235570/236295 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 71875 event pairs, 2266 based on Foata normal form. 209/12368 useless extension candidates. Maximal degree in co-relation 76044. Up to 11061 conditions per place. [2024-06-27 21:39:03,656 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 173 selfloop transitions, 126 changer transitions 0/326 dead transitions. [2024-06-27 21:39:03,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 326 transitions, 4024 flow [2024-06-27 21:39:03,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:39:03,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:39:03,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-27 21:39:03,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-27 21:39:03,658 INFO L175 Difference]: Start difference. First operand has 144 places, 274 transitions, 3262 flow. Second operand 7 states and 196 transitions. [2024-06-27 21:39:03,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 326 transitions, 4024 flow [2024-06-27 21:39:04,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 326 transitions, 3882 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 21:39:04,357 INFO L231 Difference]: Finished difference. Result has 145 places, 274 transitions, 3411 flow [2024-06-27 21:39:04,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3120, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3411, PETRI_PLACES=145, PETRI_TRANSITIONS=274} [2024-06-27 21:39:04,358 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 88 predicate places. [2024-06-27 21:39:04,358 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 274 transitions, 3411 flow [2024-06-27 21:39:04,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:04,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:04,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:04,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:39:04,359 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)] === [2024-06-27 21:39:04,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:04,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1710543194, now seen corresponding path program 2 times [2024-06-27 21:39:04,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:04,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145894828] [2024-06-27 21:39:04,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:04,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:04,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:07,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:07,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:07,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145894828] [2024-06-27 21:39:07,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145894828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:07,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:07,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:07,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293423246] [2024-06-27 21:39:07,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:07,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:07,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:07,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:07,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:07,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:39:07,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 274 transitions, 3411 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:07,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:07,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:39:07,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:10,661 INFO L124 PetriNetUnfolderBase]: 9369/13273 cut-off events. [2024-06-27 21:39:10,661 INFO L125 PetriNetUnfolderBase]: For 229399/230227 co-relation queries the response was YES. [2024-06-27 21:39:10,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78663 conditions, 13273 events. 9369/13273 cut-off events. For 229399/230227 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 74309 event pairs, 3161 based on Foata normal form. 157/13394 useless extension candidates. Maximal degree in co-relation 78601. Up to 12571 conditions per place. [2024-06-27 21:39:10,755 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 271 selfloop transitions, 43 changer transitions 0/322 dead transitions. [2024-06-27 21:39:10,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 322 transitions, 4224 flow [2024-06-27 21:39:10,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:39:10,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:39:10,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 21:39:10,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-27 21:39:10,763 INFO L175 Difference]: Start difference. First operand has 145 places, 274 transitions, 3411 flow. Second operand 7 states and 181 transitions. [2024-06-27 21:39:10,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 322 transitions, 4224 flow [2024-06-27 21:39:11,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 322 transitions, 3945 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 21:39:11,219 INFO L231 Difference]: Finished difference. Result has 146 places, 277 transitions, 3278 flow [2024-06-27 21:39:11,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3132, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3278, PETRI_PLACES=146, PETRI_TRANSITIONS=277} [2024-06-27 21:39:11,220 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 89 predicate places. [2024-06-27 21:39:11,220 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 277 transitions, 3278 flow [2024-06-27 21:39:11,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:11,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:11,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:11,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:39:11,221 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)] === [2024-06-27 21:39:11,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:11,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1938444344, now seen corresponding path program 3 times [2024-06-27 21:39:11,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:11,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980797547] [2024-06-27 21:39:11,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:11,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:14,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:14,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:14,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980797547] [2024-06-27 21:39:14,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980797547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:14,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:14,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:14,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878308791] [2024-06-27 21:39:14,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:14,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:14,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:14,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:14,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:14,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:39:14,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 277 transitions, 3278 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:14,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:14,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:39:14,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:17,312 INFO L124 PetriNetUnfolderBase]: 9413/13325 cut-off events. [2024-06-27 21:39:17,313 INFO L125 PetriNetUnfolderBase]: For 229093/229434 co-relation queries the response was YES. [2024-06-27 21:39:17,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79680 conditions, 13325 events. 9413/13325 cut-off events. For 229093/229434 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 74467 event pairs, 3137 based on Foata normal form. 101/13404 useless extension candidates. Maximal degree in co-relation 79617. Up to 12597 conditions per place. [2024-06-27 21:39:17,435 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 273 selfloop transitions, 47 changer transitions 0/328 dead transitions. [2024-06-27 21:39:17,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 328 transitions, 4117 flow [2024-06-27 21:39:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:39:17,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:39:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 21:39:17,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-27 21:39:17,437 INFO L175 Difference]: Start difference. First operand has 146 places, 277 transitions, 3278 flow. Second operand 7 states and 186 transitions. [2024-06-27 21:39:17,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 328 transitions, 4117 flow [2024-06-27 21:39:17,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 328 transitions, 3997 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 21:39:17,896 INFO L231 Difference]: Finished difference. Result has 148 places, 280 transitions, 3322 flow [2024-06-27 21:39:17,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3158, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3322, PETRI_PLACES=148, PETRI_TRANSITIONS=280} [2024-06-27 21:39:17,896 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 91 predicate places. [2024-06-27 21:39:17,896 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 280 transitions, 3322 flow [2024-06-27 21:39:17,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:17,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:17,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:17,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:39:17,897 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)] === [2024-06-27 21:39:17,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:17,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1701972314, now seen corresponding path program 4 times [2024-06-27 21:39:17,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:17,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953008285] [2024-06-27 21:39:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:17,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:21,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:21,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953008285] [2024-06-27 21:39:21,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953008285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:21,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:21,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:21,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820974260] [2024-06-27 21:39:21,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:21,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:21,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:21,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:21,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:21,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:39:21,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 280 transitions, 3322 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:21,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:21,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:39:21,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:24,366 INFO L124 PetriNetUnfolderBase]: 9398/13316 cut-off events. [2024-06-27 21:39:24,366 INFO L125 PetriNetUnfolderBase]: For 251369/252188 co-relation queries the response was YES. [2024-06-27 21:39:24,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81633 conditions, 13316 events. 9398/13316 cut-off events. For 251369/252188 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 74497 event pairs, 2974 based on Foata normal form. 157/13437 useless extension candidates. Maximal degree in co-relation 81569. Up to 12452 conditions per place. [2024-06-27 21:39:24,477 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 267 selfloop transitions, 54 changer transitions 0/329 dead transitions. [2024-06-27 21:39:24,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 329 transitions, 4163 flow [2024-06-27 21:39:24,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:39:24,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:39:24,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 21:39:24,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-27 21:39:24,479 INFO L175 Difference]: Start difference. First operand has 148 places, 280 transitions, 3322 flow. Second operand 7 states and 182 transitions. [2024-06-27 21:39:24,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 329 transitions, 4163 flow [2024-06-27 21:39:24,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 329 transitions, 4021 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 21:39:24,916 INFO L231 Difference]: Finished difference. Result has 150 places, 283 transitions, 3360 flow [2024-06-27 21:39:24,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3186, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3360, PETRI_PLACES=150, PETRI_TRANSITIONS=283} [2024-06-27 21:39:24,917 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 93 predicate places. [2024-06-27 21:39:24,917 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 283 transitions, 3360 flow [2024-06-27 21:39:24,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:24,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:24,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:24,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:39:24,918 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:39:24,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:24,918 INFO L85 PathProgramCache]: Analyzing trace with hash 344030338, now seen corresponding path program 1 times [2024-06-27 21:39:24,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:24,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166178502] [2024-06-27 21:39:24,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:24,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:26,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:26,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:26,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166178502] [2024-06-27 21:39:26,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166178502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:26,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:26,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:39:26,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134295967] [2024-06-27 21:39:26,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:26,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:39:26,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:26,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:39:26,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:39:26,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:39:26,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 283 transitions, 3360 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) [2024-06-27 21:39:26,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:26,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:39:26,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:29,878 INFO L124 PetriNetUnfolderBase]: 10230/14476 cut-off events. [2024-06-27 21:39:29,879 INFO L125 PetriNetUnfolderBase]: For 282010/282474 co-relation queries the response was YES. [2024-06-27 21:39:29,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87979 conditions, 14476 events. 10230/14476 cut-off events. For 282010/282474 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 81897 event pairs, 3899 based on Foata normal form. 429/14846 useless extension candidates. Maximal degree in co-relation 87914. Up to 13752 conditions per place. [2024-06-27 21:39:29,992 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 284 selfloop transitions, 15 changer transitions 0/315 dead transitions. [2024-06-27 21:39:29,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 315 transitions, 4148 flow [2024-06-27 21:39:29,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:39:29,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:39:29,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-27 21:39:29,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45925925925925926 [2024-06-27 21:39:29,998 INFO L175 Difference]: Start difference. First operand has 150 places, 283 transitions, 3360 flow. Second operand 5 states and 124 transitions. [2024-06-27 21:39:29,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 315 transitions, 4148 flow [2024-06-27 21:39:30,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 315 transitions, 3996 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 21:39:30,424 INFO L231 Difference]: Finished difference. Result has 151 places, 296 transitions, 3411 flow [2024-06-27 21:39:30,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3212, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3411, PETRI_PLACES=151, PETRI_TRANSITIONS=296} [2024-06-27 21:39:30,428 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 94 predicate places. [2024-06-27 21:39:30,428 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 296 transitions, 3411 flow [2024-06-27 21:39:30,428 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) [2024-06-27 21:39:30,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:30,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:30,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:39:30,429 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:39:30,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:30,429 INFO L85 PathProgramCache]: Analyzing trace with hash -532758156, now seen corresponding path program 1 times [2024-06-27 21:39:30,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:30,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290289190] [2024-06-27 21:39:30,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:30,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:34,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:34,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:34,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290289190] [2024-06-27 21:39:34,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290289190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:34,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:34,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:34,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481228605] [2024-06-27 21:39:34,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:34,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:34,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:34,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:34,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:34,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:39:34,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 296 transitions, 3411 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:34,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:34,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:39:34,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:38,315 INFO L124 PetriNetUnfolderBase]: 10641/15088 cut-off events. [2024-06-27 21:39:38,316 INFO L125 PetriNetUnfolderBase]: For 318542/319185 co-relation queries the response was YES. [2024-06-27 21:39:38,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96911 conditions, 15088 events. 10641/15088 cut-off events. For 318542/319185 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 85788 event pairs, 2313 based on Foata normal form. 211/15268 useless extension candidates. Maximal degree in co-relation 96844. Up to 12868 conditions per place. [2024-06-27 21:39:38,440 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 282 selfloop transitions, 104 changer transitions 0/396 dead transitions. [2024-06-27 21:39:38,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 396 transitions, 4829 flow [2024-06-27 21:39:38,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:38,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:38,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2024-06-27 21:39:38,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51440329218107 [2024-06-27 21:39:38,448 INFO L175 Difference]: Start difference. First operand has 151 places, 296 transitions, 3411 flow. Second operand 9 states and 250 transitions. [2024-06-27 21:39:38,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 396 transitions, 4829 flow [2024-06-27 21:39:38,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 396 transitions, 4811 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 21:39:38,959 INFO L231 Difference]: Finished difference. Result has 161 places, 310 transitions, 3869 flow [2024-06-27 21:39:38,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3393, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3869, PETRI_PLACES=161, PETRI_TRANSITIONS=310} [2024-06-27 21:39:38,962 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 104 predicate places. [2024-06-27 21:39:38,962 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 310 transitions, 3869 flow [2024-06-27 21:39:38,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:38,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:38,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:38,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:39:38,963 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:39:38,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:38,964 INFO L85 PathProgramCache]: Analyzing trace with hash -899941336, now seen corresponding path program 2 times [2024-06-27 21:39:38,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:38,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867591720] [2024-06-27 21:39:38,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:38,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:42,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:42,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867591720] [2024-06-27 21:39:42,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867591720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:42,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:42,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:42,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796018447] [2024-06-27 21:39:42,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:42,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:42,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:42,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:42,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:42,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:39:42,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 310 transitions, 3869 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:42,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:42,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:39:42,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:47,082 INFO L124 PetriNetUnfolderBase]: 10963/15573 cut-off events. [2024-06-27 21:39:47,082 INFO L125 PetriNetUnfolderBase]: For 361908/362556 co-relation queries the response was YES. [2024-06-27 21:39:47,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103644 conditions, 15573 events. 10963/15573 cut-off events. For 361908/362556 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 89122 event pairs, 3163 based on Foata normal form. 221/15764 useless extension candidates. Maximal degree in co-relation 103572. Up to 13968 conditions per place. [2024-06-27 21:39:47,230 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 289 selfloop transitions, 98 changer transitions 0/397 dead transitions. [2024-06-27 21:39:47,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 397 transitions, 5161 flow [2024-06-27 21:39:47,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:47,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:47,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2024-06-27 21:39:47,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51440329218107 [2024-06-27 21:39:47,232 INFO L175 Difference]: Start difference. First operand has 161 places, 310 transitions, 3869 flow. Second operand 9 states and 250 transitions. [2024-06-27 21:39:47,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 397 transitions, 5161 flow [2024-06-27 21:39:48,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 397 transitions, 5010 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 21:39:48,056 INFO L231 Difference]: Finished difference. Result has 167 places, 316 transitions, 4055 flow [2024-06-27 21:39:48,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3718, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4055, PETRI_PLACES=167, PETRI_TRANSITIONS=316} [2024-06-27 21:39:48,056 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 110 predicate places. [2024-06-27 21:39:48,056 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 316 transitions, 4055 flow [2024-06-27 21:39:48,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:48,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:48,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:48,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:39:48,057 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:39:48,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:48,058 INFO L85 PathProgramCache]: Analyzing trace with hash -444044526, now seen corresponding path program 3 times [2024-06-27 21:39:48,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:48,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327079345] [2024-06-27 21:39:48,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:48,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:51,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:51,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327079345] [2024-06-27 21:39:51,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327079345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:51,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:51,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:51,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031339628] [2024-06-27 21:39:51,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:51,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:51,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:51,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:51,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:52,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:39:52,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 316 transitions, 4055 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:52,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:52,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:39:52,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:56,810 INFO L124 PetriNetUnfolderBase]: 10909/15499 cut-off events. [2024-06-27 21:39:56,811 INFO L125 PetriNetUnfolderBase]: For 381633/382297 co-relation queries the response was YES. [2024-06-27 21:39:56,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104265 conditions, 15499 events. 10909/15499 cut-off events. For 381633/382297 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 88690 event pairs, 3183 based on Foata normal form. 227/15696 useless extension candidates. Maximal degree in co-relation 104190. Up to 14194 conditions per place. [2024-06-27 21:39:56,934 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 286 selfloop transitions, 96 changer transitions 0/392 dead transitions. [2024-06-27 21:39:56,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 392 transitions, 5090 flow [2024-06-27 21:39:56,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:56,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:56,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-27 21:39:56,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020576131687243 [2024-06-27 21:39:56,936 INFO L175 Difference]: Start difference. First operand has 167 places, 316 transitions, 4055 flow. Second operand 9 states and 244 transitions. [2024-06-27 21:39:56,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 392 transitions, 5090 flow [2024-06-27 21:39:57,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 392 transitions, 4917 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 21:39:57,655 INFO L231 Difference]: Finished difference. Result has 171 places, 317 transitions, 4106 flow [2024-06-27 21:39:57,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3890, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4106, PETRI_PLACES=171, PETRI_TRANSITIONS=317} [2024-06-27 21:39:57,656 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 114 predicate places. [2024-06-27 21:39:57,656 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 317 transitions, 4106 flow [2024-06-27 21:39:57,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:57,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:57,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:57,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:39:57,657 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:39:57,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:57,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1620734492, now seen corresponding path program 4 times [2024-06-27 21:39:57,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:57,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859957715] [2024-06-27 21:39:57,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:57,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:57,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:01,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:01,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859957715] [2024-06-27 21:40:01,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859957715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:01,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:01,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:01,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558780185] [2024-06-27 21:40:01,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:01,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:01,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:01,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:01,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:01,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:40:01,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 317 transitions, 4106 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:01,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:01,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:40:01,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:05,279 INFO L124 PetriNetUnfolderBase]: 11065/15735 cut-off events. [2024-06-27 21:40:05,279 INFO L125 PetriNetUnfolderBase]: For 402927/403514 co-relation queries the response was YES. [2024-06-27 21:40:05,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106559 conditions, 15735 events. 11065/15735 cut-off events. For 402927/403514 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 90517 event pairs, 3228 based on Foata normal form. 171/15877 useless extension candidates. Maximal degree in co-relation 106482. Up to 14702 conditions per place. [2024-06-27 21:40:05,471 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 322 selfloop transitions, 60 changer transitions 0/392 dead transitions. [2024-06-27 21:40:05,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 392 transitions, 5171 flow [2024-06-27 21:40:05,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:05,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:05,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-27 21:40:05,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2024-06-27 21:40:05,473 INFO L175 Difference]: Start difference. First operand has 171 places, 317 transitions, 4106 flow. Second operand 9 states and 240 transitions. [2024-06-27 21:40:05,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 392 transitions, 5171 flow [2024-06-27 21:40:06,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 392 transitions, 4979 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 21:40:06,513 INFO L231 Difference]: Finished difference. Result has 173 places, 319 transitions, 4100 flow [2024-06-27 21:40:06,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3914, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4100, PETRI_PLACES=173, PETRI_TRANSITIONS=319} [2024-06-27 21:40:06,513 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 116 predicate places. [2024-06-27 21:40:06,513 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 319 transitions, 4100 flow [2024-06-27 21:40:06,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:06,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:06,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:06,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:40:06,514 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:40:06,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:06,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1615372112, now seen corresponding path program 5 times [2024-06-27 21:40:06,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:06,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991274632] [2024-06-27 21:40:06,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:06,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:11,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:11,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991274632] [2024-06-27 21:40:11,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991274632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:11,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:11,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:11,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194178051] [2024-06-27 21:40:11,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:11,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:11,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:11,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:11,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:11,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:40:11,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 319 transitions, 4100 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:11,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:11,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:40:11,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:15,639 INFO L124 PetriNetUnfolderBase]: 11221/15991 cut-off events. [2024-06-27 21:40:15,639 INFO L125 PetriNetUnfolderBase]: For 430246/430823 co-relation queries the response was YES. [2024-06-27 21:40:15,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108884 conditions, 15991 events. 11221/15991 cut-off events. For 430246/430823 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 92587 event pairs, 3258 based on Foata normal form. 171/16133 useless extension candidates. Maximal degree in co-relation 108806. Up to 14938 conditions per place. [2024-06-27 21:40:15,807 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 340 selfloop transitions, 62 changer transitions 0/412 dead transitions. [2024-06-27 21:40:15,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 412 transitions, 5261 flow [2024-06-27 21:40:15,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:40:15,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:40:15,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 288 transitions. [2024-06-27 21:40:15,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-27 21:40:15,810 INFO L175 Difference]: Start difference. First operand has 173 places, 319 transitions, 4100 flow. Second operand 11 states and 288 transitions. [2024-06-27 21:40:15,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 412 transitions, 5261 flow [2024-06-27 21:40:16,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 412 transitions, 5117 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 21:40:16,749 INFO L231 Difference]: Finished difference. Result has 177 places, 321 transitions, 4150 flow [2024-06-27 21:40:16,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3956, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4150, PETRI_PLACES=177, PETRI_TRANSITIONS=321} [2024-06-27 21:40:16,750 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 120 predicate places. [2024-06-27 21:40:16,750 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 321 transitions, 4150 flow [2024-06-27 21:40:16,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:16,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:16,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:16,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:40:16,750 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:40:16,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:16,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1620882362, now seen corresponding path program 6 times [2024-06-27 21:40:16,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:16,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542773464] [2024-06-27 21:40:16,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:16,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:21,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:21,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542773464] [2024-06-27 21:40:21,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542773464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:21,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:21,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:21,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980373994] [2024-06-27 21:40:21,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:21,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:21,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:21,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:21,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:21,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:40:21,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 321 transitions, 4150 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:21,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:21,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:40:21,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:25,538 INFO L124 PetriNetUnfolderBase]: 11333/16163 cut-off events. [2024-06-27 21:40:25,539 INFO L125 PetriNetUnfolderBase]: For 454560/455137 co-relation queries the response was YES. [2024-06-27 21:40:25,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110747 conditions, 16163 events. 11333/16163 cut-off events. For 454560/455137 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 93801 event pairs, 3236 based on Foata normal form. 165/16299 useless extension candidates. Maximal degree in co-relation 110668. Up to 14670 conditions per place. [2024-06-27 21:40:25,670 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 327 selfloop transitions, 65 changer transitions 0/402 dead transitions. [2024-06-27 21:40:25,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 402 transitions, 5299 flow [2024-06-27 21:40:25,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:25,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:25,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-27 21:40:25,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49794238683127573 [2024-06-27 21:40:25,693 INFO L175 Difference]: Start difference. First operand has 177 places, 321 transitions, 4150 flow. Second operand 9 states and 242 transitions. [2024-06-27 21:40:25,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 402 transitions, 5299 flow [2024-06-27 21:40:26,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 402 transitions, 5147 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-27 21:40:26,474 INFO L231 Difference]: Finished difference. Result has 178 places, 326 transitions, 4265 flow [2024-06-27 21:40:26,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3998, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4265, PETRI_PLACES=178, PETRI_TRANSITIONS=326} [2024-06-27 21:40:26,475 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 121 predicate places. [2024-06-27 21:40:26,475 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 326 transitions, 4265 flow [2024-06-27 21:40:26,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:26,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:26,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:26,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:40:26,476 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:40:26,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:26,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1615156910, now seen corresponding path program 1 times [2024-06-27 21:40:26,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:26,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249386141] [2024-06-27 21:40:26,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:26,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:30,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:30,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:30,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249386141] [2024-06-27 21:40:30,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249386141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:30,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:30,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:30,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89120848] [2024-06-27 21:40:30,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:30,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:30,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:30,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:30,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:30,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:40:30,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 326 transitions, 4265 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:30,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:30,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:40:30,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:35,162 INFO L124 PetriNetUnfolderBase]: 11445/16355 cut-off events. [2024-06-27 21:40:35,163 INFO L125 PetriNetUnfolderBase]: For 481683/482260 co-relation queries the response was YES. [2024-06-27 21:40:35,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112739 conditions, 16355 events. 11445/16355 cut-off events. For 481683/482260 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 95395 event pairs, 3270 based on Foata normal form. 165/16491 useless extension candidates. Maximal degree in co-relation 112658. Up to 14908 conditions per place. [2024-06-27 21:40:35,288 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 343 selfloop transitions, 69 changer transitions 0/422 dead transitions. [2024-06-27 21:40:35,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 422 transitions, 5454 flow [2024-06-27 21:40:35,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:40:35,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:40:35,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 290 transitions. [2024-06-27 21:40:35,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882154882154882 [2024-06-27 21:40:35,294 INFO L175 Difference]: Start difference. First operand has 178 places, 326 transitions, 4265 flow. Second operand 11 states and 290 transitions. [2024-06-27 21:40:35,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 422 transitions, 5454 flow [2024-06-27 21:40:36,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 422 transitions, 5337 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 21:40:36,127 INFO L231 Difference]: Finished difference. Result has 184 places, 328 transitions, 4345 flow [2024-06-27 21:40:36,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=4148, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4345, PETRI_PLACES=184, PETRI_TRANSITIONS=328} [2024-06-27 21:40:36,128 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 127 predicate places. [2024-06-27 21:40:36,128 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 328 transitions, 4345 flow [2024-06-27 21:40:36,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:36,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:36,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:36,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:40:36,128 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:40:36,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:36,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1487445324, now seen corresponding path program 7 times [2024-06-27 21:40:36,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:36,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697881976] [2024-06-27 21:40:36,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:36,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:40,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:40,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:40,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697881976] [2024-06-27 21:40:40,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697881976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:40,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:40,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:40,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592114088] [2024-06-27 21:40:40,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:40,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:40,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:40,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:40,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:40,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:40:40,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 328 transitions, 4345 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:40,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:40,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:40:40,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:45,211 INFO L124 PetriNetUnfolderBase]: 11760/16838 cut-off events. [2024-06-27 21:40:45,211 INFO L125 PetriNetUnfolderBase]: For 525234/526101 co-relation queries the response was YES. [2024-06-27 21:40:45,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118363 conditions, 16838 events. 11760/16838 cut-off events. For 525234/526101 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 99042 event pairs, 3329 based on Foata normal form. 268/17062 useless extension candidates. Maximal degree in co-relation 118280. Up to 15560 conditions per place. [2024-06-27 21:40:45,456 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 310 selfloop transitions, 90 changer transitions 0/410 dead transitions. [2024-06-27 21:40:45,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 410 transitions, 5472 flow [2024-06-27 21:40:45,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:40:45,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:40:45,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 263 transitions. [2024-06-27 21:40:45,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48703703703703705 [2024-06-27 21:40:45,458 INFO L175 Difference]: Start difference. First operand has 184 places, 328 transitions, 4345 flow. Second operand 10 states and 263 transitions. [2024-06-27 21:40:45,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 410 transitions, 5472 flow [2024-06-27 21:40:46,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 410 transitions, 5301 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-27 21:40:46,216 INFO L231 Difference]: Finished difference. Result has 185 places, 330 transitions, 4432 flow [2024-06-27 21:40:46,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=4174, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4432, PETRI_PLACES=185, PETRI_TRANSITIONS=330} [2024-06-27 21:40:46,217 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 128 predicate places. [2024-06-27 21:40:46,217 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 330 transitions, 4432 flow [2024-06-27 21:40:46,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:46,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:46,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:46,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:40:46,218 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:40:46,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:46,218 INFO L85 PathProgramCache]: Analyzing trace with hash 37553618, now seen corresponding path program 8 times [2024-06-27 21:40:46,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:46,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64058363] [2024-06-27 21:40:46,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:46,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:49,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:49,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64058363] [2024-06-27 21:40:49,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64058363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:49,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:49,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:49,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062672012] [2024-06-27 21:40:49,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:49,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:49,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:49,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:49,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:49,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:40:49,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 330 transitions, 4432 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:49,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:49,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:40:49,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:55,039 INFO L124 PetriNetUnfolderBase]: 11731/16795 cut-off events. [2024-06-27 21:40:55,039 INFO L125 PetriNetUnfolderBase]: For 547864/548515 co-relation queries the response was YES. [2024-06-27 21:40:55,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118326 conditions, 16795 events. 11731/16795 cut-off events. For 547864/548515 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 98766 event pairs, 3320 based on Foata normal form. 265/17029 useless extension candidates. Maximal degree in co-relation 118242. Up to 15352 conditions per place. [2024-06-27 21:40:55,181 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 311 selfloop transitions, 94 changer transitions 0/415 dead transitions. [2024-06-27 21:40:55,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 415 transitions, 5581 flow [2024-06-27 21:40:55,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:40:55,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:40:55,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 269 transitions. [2024-06-27 21:40:55,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981481481481482 [2024-06-27 21:40:55,188 INFO L175 Difference]: Start difference. First operand has 185 places, 330 transitions, 4432 flow. Second operand 10 states and 269 transitions. [2024-06-27 21:40:55,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 415 transitions, 5581 flow [2024-06-27 21:40:56,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 415 transitions, 5365 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 21:40:56,160 INFO L231 Difference]: Finished difference. Result has 187 places, 332 transitions, 4490 flow [2024-06-27 21:40:56,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=4216, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4490, PETRI_PLACES=187, PETRI_TRANSITIONS=332} [2024-06-27 21:40:56,161 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 130 predicate places. [2024-06-27 21:40:56,161 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 332 transitions, 4490 flow [2024-06-27 21:40:56,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:56,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:56,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:56,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:40:56,162 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:40:56,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:56,163 INFO L85 PathProgramCache]: Analyzing trace with hash 32191238, now seen corresponding path program 9 times [2024-06-27 21:40:56,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:56,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406514914] [2024-06-27 21:40:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:56,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat