./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix005.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix005.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix005.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix005.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 20:32:37,344 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:32:37,387 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:32:37,391 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:32:37,391 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:32:37,406 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:32:37,407 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:32:37,407 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:32:37,407 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:32:37,408 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:32:37,408 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:32:37,408 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:32:37,409 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:32:37,409 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:32:37,409 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:32:37,410 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:32:37,410 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:32:37,410 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:32:37,411 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:32:37,411 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:32:37,411 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:32:37,412 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:32:37,412 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:32:37,412 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:32:37,413 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:32:37,413 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:32:37,413 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:32:37,414 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:32:37,414 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:32:37,414 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:32:37,415 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:32:37,415 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:32:37,415 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:32:37,415 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:32:37,416 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:32:37,416 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:32:37,416 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:32:37,417 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:32:37,417 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:32:37,417 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:32:37,417 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:32:37,418 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:32:37,418 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:32:37,418 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:32:37,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:32:37,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:32:37,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:32:37,665 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:32:37,666 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:32:37,667 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix005.opt.yml/witness.yml [2024-06-21 20:32:37,877 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:32:37,878 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:32:37,878 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix005.opt.i [2024-06-21 20:32:38,896 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:32:39,136 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:32:39,136 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix005.opt.i [2024-06-21 20:32:39,159 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e679a924/ded8f70af349496d86ff888dcb9e95a3/FLAG925feaaa3 [2024-06-21 20:32:39,171 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e679a924/ded8f70af349496d86ff888dcb9e95a3 [2024-06-21 20:32:39,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:32:39,173 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:32:39,175 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:32:39,175 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:32:39,179 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:32:39,180 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:32:37" (1/2) ... [2024-06-21 20:32:39,181 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b75a29b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:32:39, skipping insertion in model container [2024-06-21 20:32:39,181 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:32:37" (1/2) ... [2024-06-21 20:32:39,182 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7762f0e1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:32:39, skipping insertion in model container [2024-06-21 20:32:39,182 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:32:39" (2/2) ... [2024-06-21 20:32:39,183 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b75a29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:32:39, skipping insertion in model container [2024-06-21 20:32:39,183 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:32:39" (2/2) ... [2024-06-21 20:32:39,183 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:32:39,284 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:32:39,285 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] (((((((((((((((((((((((! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-21 20:32:39,285 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((((((((! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-21 20:32:39,285 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] (((((((((((((((((((((((! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-21 20:32:39,285 INFO L97 edCorrectnessWitness]: Location invariant before [L877-L877] (((((((((((((((((((((((! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-21 20:32:39,286 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:32:39,286 INFO L106 edCorrectnessWitness]: ghost_update [L870-L870] multithreaded = 1; [2024-06-21 20:32:39,354 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:32:39,646 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:32:39,657 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:32:39,835 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:32:39,868 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:32:39,869 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:32:39 WrapperNode [2024-06-21 20:32:39,869 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:32:39,872 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:32:39,872 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:32:39,873 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:32:39,878 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:32:39" (1/1) ... [2024-06-21 20:32:39,898 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:32:39" (1/1) ... [2024-06-21 20:32:39,948 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 162 [2024-06-21 20:32:39,950 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:32:39,951 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:32:39,951 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:32:39,951 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:32:39,960 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:32:39" (1/1) ... [2024-06-21 20:32:39,960 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:32:39" (1/1) ... [2024-06-21 20:32:39,972 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:32:39" (1/1) ... [2024-06-21 20:32:39,996 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 20:32:39,999 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:32:39" (1/1) ... [2024-06-21 20:32:39,999 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:32:39" (1/1) ... [2024-06-21 20:32:40,019 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:32:39" (1/1) ... [2024-06-21 20:32:40,022 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:32:39" (1/1) ... [2024-06-21 20:32:40,026 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:32:39" (1/1) ... [2024-06-21 20:32:40,032 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:32:39" (1/1) ... [2024-06-21 20:32:40,036 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:32:40,039 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:32:40,040 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:32:40,040 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:32:40,040 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:32:39" (1/1) ... [2024-06-21 20:32:40,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:32:40,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:32:40,074 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 20:32:40,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 20:32:40,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:32:40,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:32:40,110 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:32:40,111 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:32:40,111 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:32:40,111 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:32:40,111 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:32:40,111 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:32:40,111 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 20:32:40,112 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 20:32:40,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:32:40,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:32:40,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:32:40,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:32:40,114 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:32:40,253 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:32:40,256 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:32:40,595 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:32:40,595 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:32:40,742 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:32:40,742 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:32:40,742 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:32:40 BoogieIcfgContainer [2024-06-21 20:32:40,742 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:32:40,744 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:32:40,744 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:32:40,746 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:32:40,747 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:32:37" (1/4) ... [2024-06-21 20:32:40,747 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f570b9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:32:40, skipping insertion in model container [2024-06-21 20:32:40,747 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:32:39" (2/4) ... [2024-06-21 20:32:40,747 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f570b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:32:40, skipping insertion in model container [2024-06-21 20:32:40,747 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:32:39" (3/4) ... [2024-06-21 20:32:40,747 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f570b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:32:40, skipping insertion in model container [2024-06-21 20:32:40,747 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:32:40" (4/4) ... [2024-06-21 20:32:40,748 INFO L112 eAbstractionObserver]: Analyzing ICFG mix005.opt.i [2024-06-21 20:32:40,760 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:32:40,761 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 20:32:40,761 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:32:40,807 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:32:40,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 20:32:40,870 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-21 20:32:40,871 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:32:40,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:32:40,872 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 20:32:40,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-21 20:32:40,917 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:32:40,923 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;@68df05fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:32:40,923 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 20:32:40,929 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:32:40,929 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:32:40,929 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:32:40,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:40,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:32:40,931 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:40,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:40,935 INFO L85 PathProgramCache]: Analyzing trace with hash 422091523, now seen corresponding path program 1 times [2024-06-21 20:32:40,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:40,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694234696] [2024-06-21 20:32:40,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:40,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:41,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:41,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694234696] [2024-06-21 20:32:41,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694234696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:41,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:41,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:32:41,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548434369] [2024-06-21 20:32:41,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:41,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:32:41,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:41,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:32:41,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:32:42,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-06-21 20:32:42,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:42,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:42,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-06-21 20:32:42,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:42,941 INFO L124 PetriNetUnfolderBase]: 6201/8888 cut-off events. [2024-06-21 20:32:42,942 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2024-06-21 20:32:42,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17644 conditions, 8888 events. 6201/8888 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 51115 event pairs, 4673 based on Foata normal form. 1/8581 useless extension candidates. Maximal degree in co-relation 17631. Up to 8487 conditions per place. [2024-06-21 20:32:42,992 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 41 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-21 20:32:42,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 227 flow [2024-06-21 20:32:42,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:32:42,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:32:43,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-06-21 20:32:43,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6540880503144654 [2024-06-21 20:32:43,004 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 104 transitions. [2024-06-21 20:32:43,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 227 flow [2024-06-21 20:32:43,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 20:32:43,009 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-21 20:32:43,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-21 20:32:43,012 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-21 20:32:43,013 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-21 20:32:43,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:43,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:43,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:43,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:32:43,014 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:43,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:43,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1904208308, now seen corresponding path program 1 times [2024-06-21 20:32:43,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:43,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039423004] [2024-06-21 20:32:43,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:43,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:43,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:43,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039423004] [2024-06-21 20:32:43,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039423004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:43,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:43,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:32:43,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732256719] [2024-06-21 20:32:43,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:43,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:32:43,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:43,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:32:43,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:32:43,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-21 20:32:43,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:43,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:43,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-21 20:32:43,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:44,618 INFO L124 PetriNetUnfolderBase]: 7096/9935 cut-off events. [2024-06-21 20:32:44,619 INFO L125 PetriNetUnfolderBase]: For 2104/2104 co-relation queries the response was YES. [2024-06-21 20:32:44,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22673 conditions, 9935 events. 7096/9935 cut-off events. For 2104/2104 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 55696 event pairs, 4749 based on Foata normal form. 4/9882 useless extension candidates. Maximal degree in co-relation 22661. Up to 9657 conditions per place. [2024-06-21 20:32:44,667 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 52 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-21 20:32:44,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 321 flow [2024-06-21 20:32:44,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:32:44,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:32:44,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-06-21 20:32:44,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273584905660378 [2024-06-21 20:32:44,669 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 133 transitions. [2024-06-21 20:32:44,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 321 flow [2024-06-21 20:32:44,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:32:44,672 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-21 20:32:44,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-21 20:32:44,674 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-21 20:32:44,674 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-21 20:32:44,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:44,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:44,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:44,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:32:44,677 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:44,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:44,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1099082780, now seen corresponding path program 1 times [2024-06-21 20:32:44,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:44,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339678019] [2024-06-21 20:32:44,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:44,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:45,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:45,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339678019] [2024-06-21 20:32:45,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339678019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:45,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:45,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:32:45,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147042705] [2024-06-21 20:32:45,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:45,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:32:45,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:45,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:32:45,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:32:45,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-21 20:32:45,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 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) [2024-06-21 20:32:45,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:45,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-21 20:32:45,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:46,410 INFO L124 PetriNetUnfolderBase]: 7114/10045 cut-off events. [2024-06-21 20:32:46,411 INFO L125 PetriNetUnfolderBase]: For 6000/6000 co-relation queries the response was YES. [2024-06-21 20:32:46,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25591 conditions, 10045 events. 7114/10045 cut-off events. For 6000/6000 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 56965 event pairs, 3563 based on Foata normal form. 7/10029 useless extension candidates. Maximal degree in co-relation 25577. Up to 9578 conditions per place. [2024-06-21 20:32:46,471 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 70 selfloop transitions, 21 changer transitions 0/101 dead transitions. [2024-06-21 20:32:46,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 537 flow [2024-06-21 20:32:46,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:32:46,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:32:46,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 174 transitions. [2024-06-21 20:32:46,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6566037735849056 [2024-06-21 20:32:46,477 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 5 states and 174 transitions. [2024-06-21 20:32:46,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 537 flow [2024-06-21 20:32:46,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 518 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 20:32:46,482 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 312 flow [2024-06-21 20:32:46,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-21 20:32:46,483 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-21 20:32:46,483 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 312 flow [2024-06-21 20:32:46,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 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) [2024-06-21 20:32:46,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:46,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:46,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:32:46,484 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:46,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:46,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1207094069, now seen corresponding path program 1 times [2024-06-21 20:32:46,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:46,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113256064] [2024-06-21 20:32:46,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:46,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:47,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:47,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:47,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113256064] [2024-06-21 20:32:47,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113256064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:47,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:47,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:32:47,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539019913] [2024-06-21 20:32:47,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:47,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:32:47,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:47,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:32:47,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:32:47,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-21 20:32:47,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:47,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:47,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-21 20:32:47,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:48,475 INFO L124 PetriNetUnfolderBase]: 7256/10263 cut-off events. [2024-06-21 20:32:48,476 INFO L125 PetriNetUnfolderBase]: For 14577/14596 co-relation queries the response was YES. [2024-06-21 20:32:48,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30873 conditions, 10263 events. 7256/10263 cut-off events. For 14577/14596 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 58470 event pairs, 2792 based on Foata normal form. 48/10286 useless extension candidates. Maximal degree in co-relation 30856. Up to 9570 conditions per place. [2024-06-21 20:32:48,525 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 80 selfloop transitions, 24 changer transitions 0/114 dead transitions. [2024-06-21 20:32:48,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 114 transitions, 692 flow [2024-06-21 20:32:48,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:32:48,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:32:48,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 204 transitions. [2024-06-21 20:32:48,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6415094339622641 [2024-06-21 20:32:48,527 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 312 flow. Second operand 6 states and 204 transitions. [2024-06-21 20:32:48,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 114 transitions, 692 flow [2024-06-21 20:32:48,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 114 transitions, 680 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-21 20:32:48,538 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 381 flow [2024-06-21 20:32:48,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=381, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-06-21 20:32:48,539 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2024-06-21 20:32:48,539 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 381 flow [2024-06-21 20:32:48,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:48,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:48,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:48,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:32:48,540 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:48,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:48,540 INFO L85 PathProgramCache]: Analyzing trace with hash 174290, now seen corresponding path program 1 times [2024-06-21 20:32:48,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:48,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926615502] [2024-06-21 20:32:48,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:48,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:49,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:49,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926615502] [2024-06-21 20:32:49,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926615502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:49,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:49,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:32:49,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612036044] [2024-06-21 20:32:49,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:49,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:32:49,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:49,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:32:49,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:32:49,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-21 20:32:49,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 381 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:49,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:49,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-21 20:32:49,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:50,284 INFO L124 PetriNetUnfolderBase]: 6342/9216 cut-off events. [2024-06-21 20:32:50,284 INFO L125 PetriNetUnfolderBase]: For 18341/18363 co-relation queries the response was YES. [2024-06-21 20:32:50,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29725 conditions, 9216 events. 6342/9216 cut-off events. For 18341/18363 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 54154 event pairs, 2937 based on Foata normal form. 3/9081 useless extension candidates. Maximal degree in co-relation 29704. Up to 8693 conditions per place. [2024-06-21 20:32:50,339 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 64 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-06-21 20:32:50,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 573 flow [2024-06-21 20:32:50,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:32:50,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:32:50,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-21 20:32:50,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-21 20:32:50,344 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 381 flow. Second operand 5 states and 140 transitions. [2024-06-21 20:32:50,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 573 flow [2024-06-21 20:32:50,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 84 transitions, 512 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 20:32:50,352 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 351 flow [2024-06-21 20:32:50,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=351, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-06-21 20:32:50,356 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-21 20:32:50,356 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 351 flow [2024-06-21 20:32:50,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:50,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:50,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:50,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:32:50,357 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:50,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:50,358 INFO L85 PathProgramCache]: Analyzing trace with hash -348909597, now seen corresponding path program 1 times [2024-06-21 20:32:50,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:50,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856469936] [2024-06-21 20:32:50,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:50,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:51,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:51,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856469936] [2024-06-21 20:32:51,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856469936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:51,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:51,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:32:51,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521537072] [2024-06-21 20:32:51,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:51,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:32:51,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:51,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:32:51,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:32:51,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 20:32:51,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 351 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:51,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:51,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 20:32:51,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:52,484 INFO L124 PetriNetUnfolderBase]: 7260/10261 cut-off events. [2024-06-21 20:32:52,485 INFO L125 PetriNetUnfolderBase]: For 24753/24773 co-relation queries the response was YES. [2024-06-21 20:32:52,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33716 conditions, 10261 events. 7260/10261 cut-off events. For 24753/24773 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 58508 event pairs, 3413 based on Foata normal form. 24/10266 useless extension candidates. Maximal degree in co-relation 33693. Up to 9800 conditions per place. [2024-06-21 20:32:52,548 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 67 selfloop transitions, 25 changer transitions 0/101 dead transitions. [2024-06-21 20:32:52,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 101 transitions, 672 flow [2024-06-21 20:32:52,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:32:52,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:32:52,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-21 20:32:52,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408805031446541 [2024-06-21 20:32:52,550 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 351 flow. Second operand 6 states and 172 transitions. [2024-06-21 20:32:52,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 101 transitions, 672 flow [2024-06-21 20:32:52,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 101 transitions, 643 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 20:32:52,558 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 418 flow [2024-06-21 20:32:52,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=418, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2024-06-21 20:32:52,559 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-21 20:32:52,559 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 418 flow [2024-06-21 20:32:52,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:52,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:52,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:52,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:32:52,560 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:52,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:52,560 INFO L85 PathProgramCache]: Analyzing trace with hash 167551729, now seen corresponding path program 2 times [2024-06-21 20:32:52,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:52,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266581529] [2024-06-21 20:32:52,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:52,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:53,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:53,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266581529] [2024-06-21 20:32:53,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266581529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:53,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:53,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:32:53,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737404205] [2024-06-21 20:32:53,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:53,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:32:53,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:53,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:32:53,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:32:53,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 20:32:53,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 418 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:53,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:53,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 20:32:53,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:54,564 INFO L124 PetriNetUnfolderBase]: 7215/10188 cut-off events. [2024-06-21 20:32:54,565 INFO L125 PetriNetUnfolderBase]: For 29326/29348 co-relation queries the response was YES. [2024-06-21 20:32:54,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34402 conditions, 10188 events. 7215/10188 cut-off events. For 29326/29348 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 57813 event pairs, 3427 based on Foata normal form. 23/10188 useless extension candidates. Maximal degree in co-relation 34379. Up to 9731 conditions per place. [2024-06-21 20:32:54,617 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 60 selfloop transitions, 26 changer transitions 0/95 dead transitions. [2024-06-21 20:32:54,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 95 transitions, 652 flow [2024-06-21 20:32:54,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:32:54,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:32:54,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-21 20:32:54,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5251572327044025 [2024-06-21 20:32:54,618 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 418 flow. Second operand 6 states and 167 transitions. [2024-06-21 20:32:54,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 95 transitions, 652 flow [2024-06-21 20:32:54,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 95 transitions, 609 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 20:32:54,628 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 438 flow [2024-06-21 20:32:54,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=438, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2024-06-21 20:32:54,629 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-06-21 20:32:54,629 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 438 flow [2024-06-21 20:32:54,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:54,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:54,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:54,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:32:54,630 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:54,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:54,630 INFO L85 PathProgramCache]: Analyzing trace with hash 930657979, now seen corresponding path program 1 times [2024-06-21 20:32:54,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:54,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858972000] [2024-06-21 20:32:54,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:54,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:55,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:55,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:55,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858972000] [2024-06-21 20:32:55,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858972000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:55,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:55,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:32:55,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501579572] [2024-06-21 20:32:55,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:55,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:32:55,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:55,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:32:55,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:32:55,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 20:32:55,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 438 flow. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:55,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:55,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 20:32:55,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:56,955 INFO L124 PetriNetUnfolderBase]: 8039/11620 cut-off events. [2024-06-21 20:32:56,955 INFO L125 PetriNetUnfolderBase]: For 36191/36191 co-relation queries the response was YES. [2024-06-21 20:32:56,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38845 conditions, 11620 events. 8039/11620 cut-off events. For 36191/36191 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 67822 event pairs, 3744 based on Foata normal form. 6/11521 useless extension candidates. Maximal degree in co-relation 38821. Up to 10907 conditions per place. [2024-06-21 20:32:57,025 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 84 selfloop transitions, 17 changer transitions 0/110 dead transitions. [2024-06-21 20:32:57,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 110 transitions, 777 flow [2024-06-21 20:32:57,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:57,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:57,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-21 20:32:57,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-21 20:32:57,026 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 438 flow. Second operand 7 states and 188 transitions. [2024-06-21 20:32:57,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 110 transitions, 777 flow [2024-06-21 20:32:57,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 686 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 20:32:57,048 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 459 flow [2024-06-21 20:32:57,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=459, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2024-06-21 20:32:57,049 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2024-06-21 20:32:57,049 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 459 flow [2024-06-21 20:32:57,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:57,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:57,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:57,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:32:57,049 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:57,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:57,050 INFO L85 PathProgramCache]: Analyzing trace with hash -534817897, now seen corresponding path program 1 times [2024-06-21 20:32:57,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:57,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741669306] [2024-06-21 20:32:57,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:57,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:57,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:57,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741669306] [2024-06-21 20:32:57,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741669306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:57,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:57,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:32:57,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116168113] [2024-06-21 20:32:57,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:57,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:32:57,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:57,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:32:57,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:32:57,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:32:57,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 459 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:57,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:57,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:32:57,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:59,055 INFO L124 PetriNetUnfolderBase]: 9687/13649 cut-off events. [2024-06-21 20:32:59,055 INFO L125 PetriNetUnfolderBase]: For 52991/52991 co-relation queries the response was YES. [2024-06-21 20:32:59,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48739 conditions, 13649 events. 9687/13649 cut-off events. For 52991/52991 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 76853 event pairs, 4731 based on Foata normal form. 2/13461 useless extension candidates. Maximal degree in co-relation 48713. Up to 13154 conditions per place. [2024-06-21 20:32:59,126 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 78 selfloop transitions, 10 changer transitions 0/96 dead transitions. [2024-06-21 20:32:59,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 96 transitions, 703 flow [2024-06-21 20:32:59,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:32:59,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:32:59,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-21 20:32:59,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830188679245283 [2024-06-21 20:32:59,128 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 459 flow. Second operand 5 states and 128 transitions. [2024-06-21 20:32:59,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 96 transitions, 703 flow [2024-06-21 20:32:59,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 96 transitions, 655 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:32:59,147 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 480 flow [2024-06-21 20:32:59,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=480, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-06-21 20:32:59,148 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2024-06-21 20:32:59,148 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 480 flow [2024-06-21 20:32:59,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:59,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:59,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:59,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:32:59,149 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:59,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:59,149 INFO L85 PathProgramCache]: Analyzing trace with hash 627327955, now seen corresponding path program 1 times [2024-06-21 20:32:59,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:59,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988958956] [2024-06-21 20:32:59,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:59,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:59,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:59,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988958956] [2024-06-21 20:32:59,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988958956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:59,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:59,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:32:59,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401900483] [2024-06-21 20:32:59,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:59,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:32:59,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:59,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:32:59,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:32:59,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:32:59,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 480 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:59,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:59,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:32:59,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:01,322 INFO L124 PetriNetUnfolderBase]: 9673/13827 cut-off events. [2024-06-21 20:33:01,322 INFO L125 PetriNetUnfolderBase]: For 66217/66217 co-relation queries the response was YES. [2024-06-21 20:33:01,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51911 conditions, 13827 events. 9673/13827 cut-off events. For 66217/66217 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 79396 event pairs, 4695 based on Foata normal form. 4/13813 useless extension candidates. Maximal degree in co-relation 51884. Up to 13118 conditions per place. [2024-06-21 20:33:01,420 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 83 selfloop transitions, 14 changer transitions 0/105 dead transitions. [2024-06-21 20:33:01,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 105 transitions, 760 flow [2024-06-21 20:33:01,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:33:01,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:33:01,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 20:33:01,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748427672955975 [2024-06-21 20:33:01,421 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 480 flow. Second operand 6 states and 151 transitions. [2024-06-21 20:33:01,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 105 transitions, 760 flow [2024-06-21 20:33:01,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 105 transitions, 721 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 20:33:01,446 INFO L231 Difference]: Finished difference. Result has 80 places, 86 transitions, 524 flow [2024-06-21 20:33:01,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=524, PETRI_PLACES=80, PETRI_TRANSITIONS=86} [2024-06-21 20:33:01,447 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2024-06-21 20:33:01,447 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 86 transitions, 524 flow [2024-06-21 20:33:01,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:01,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:01,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:01,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:33:01,448 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:33:01,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:01,448 INFO L85 PathProgramCache]: Analyzing trace with hash -661202356, now seen corresponding path program 1 times [2024-06-21 20:33:01,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:01,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306811545] [2024-06-21 20:33:01,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:01,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:02,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:02,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306811545] [2024-06-21 20:33:02,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306811545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:02,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:02,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:33:02,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136477385] [2024-06-21 20:33:02,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:02,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:33:02,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:02,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:33:02,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:33:02,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 20:33:02,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 86 transitions, 524 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:02,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:02,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 20:33:02,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:04,305 INFO L124 PetriNetUnfolderBase]: 10544/14829 cut-off events. [2024-06-21 20:33:04,305 INFO L125 PetriNetUnfolderBase]: For 103607/103699 co-relation queries the response was YES. [2024-06-21 20:33:04,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61284 conditions, 14829 events. 10544/14829 cut-off events. For 103607/103699 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 86454 event pairs, 3530 based on Foata normal form. 54/14788 useless extension candidates. Maximal degree in co-relation 61256. Up to 13486 conditions per place. [2024-06-21 20:33:04,394 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 92 selfloop transitions, 32 changer transitions 0/135 dead transitions. [2024-06-21 20:33:04,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 135 transitions, 1004 flow [2024-06-21 20:33:04,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:33:04,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:33:04,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-21 20:33:04,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444743935309974 [2024-06-21 20:33:04,396 INFO L175 Difference]: Start difference. First operand has 80 places, 86 transitions, 524 flow. Second operand 7 states and 202 transitions. [2024-06-21 20:33:04,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 135 transitions, 1004 flow [2024-06-21 20:33:04,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 135 transitions, 951 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 20:33:04,422 INFO L231 Difference]: Finished difference. Result has 83 places, 90 transitions, 604 flow [2024-06-21 20:33:04,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=604, PETRI_PLACES=83, PETRI_TRANSITIONS=90} [2024-06-21 20:33:04,422 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 27 predicate places. [2024-06-21 20:33:04,422 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 90 transitions, 604 flow [2024-06-21 20:33:04,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:04,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:04,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:04,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:33:04,423 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:33:04,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:04,423 INFO L85 PathProgramCache]: Analyzing trace with hash -547522876, now seen corresponding path program 2 times [2024-06-21 20:33:04,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:04,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321935978] [2024-06-21 20:33:04,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:04,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:05,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:05,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321935978] [2024-06-21 20:33:05,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321935978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:05,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:05,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:33:05,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016807802] [2024-06-21 20:33:05,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:05,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:33:05,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:05,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:33:05,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:33:05,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 20:33:05,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 90 transitions, 604 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:05,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:05,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 20:33:05,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:07,209 INFO L124 PetriNetUnfolderBase]: 10600/14951 cut-off events. [2024-06-21 20:33:07,210 INFO L125 PetriNetUnfolderBase]: For 121450/121542 co-relation queries the response was YES. [2024-06-21 20:33:07,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64037 conditions, 14951 events. 10600/14951 cut-off events. For 121450/121542 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 87567 event pairs, 4670 based on Foata normal form. 87/14949 useless extension candidates. Maximal degree in co-relation 64008. Up to 14058 conditions per place. [2024-06-21 20:33:07,327 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 89 selfloop transitions, 31 changer transitions 0/131 dead transitions. [2024-06-21 20:33:07,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 131 transitions, 982 flow [2024-06-21 20:33:07,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:33:07,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:33:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-21 20:33:07,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5336927223719676 [2024-06-21 20:33:07,329 INFO L175 Difference]: Start difference. First operand has 83 places, 90 transitions, 604 flow. Second operand 7 states and 198 transitions. [2024-06-21 20:33:07,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 131 transitions, 982 flow [2024-06-21 20:33:07,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 131 transitions, 933 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 20:33:07,368 INFO L231 Difference]: Finished difference. Result has 87 places, 93 transitions, 672 flow [2024-06-21 20:33:07,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=672, PETRI_PLACES=87, PETRI_TRANSITIONS=93} [2024-06-21 20:33:07,369 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-06-21 20:33:07,370 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 93 transitions, 672 flow [2024-06-21 20:33:07,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:07,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:07,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:07,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:33:07,370 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:33:07,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:07,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2028068004, now seen corresponding path program 1 times [2024-06-21 20:33:07,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:07,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425725676] [2024-06-21 20:33:07,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:07,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:08,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:08,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425725676] [2024-06-21 20:33:08,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425725676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:08,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:08,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:33:08,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978956484] [2024-06-21 20:33:08,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:08,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:33:08,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:08,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:33:08,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:33:08,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 20:33:08,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 93 transitions, 672 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:08,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:08,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 20:33:08,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:09,788 INFO L124 PetriNetUnfolderBase]: 11492/15928 cut-off events. [2024-06-21 20:33:09,789 INFO L125 PetriNetUnfolderBase]: For 133098/133104 co-relation queries the response was YES. [2024-06-21 20:33:09,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69227 conditions, 15928 events. 11492/15928 cut-off events. For 133098/133104 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 88015 event pairs, 5351 based on Foata normal form. 6/15931 useless extension candidates. Maximal degree in co-relation 69196. Up to 15573 conditions per place. [2024-06-21 20:33:09,920 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 99 selfloop transitions, 21 changer transitions 0/127 dead transitions. [2024-06-21 20:33:09,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 127 transitions, 1114 flow [2024-06-21 20:33:09,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:33:09,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:33:09,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 20:33:09,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48742138364779874 [2024-06-21 20:33:09,923 INFO L175 Difference]: Start difference. First operand has 87 places, 93 transitions, 672 flow. Second operand 6 states and 155 transitions. [2024-06-21 20:33:09,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 127 transitions, 1114 flow [2024-06-21 20:33:09,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 127 transitions, 1033 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:33:09,999 INFO L231 Difference]: Finished difference. Result has 88 places, 101 transitions, 738 flow [2024-06-21 20:33:09,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=738, PETRI_PLACES=88, PETRI_TRANSITIONS=101} [2024-06-21 20:33:10,000 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-06-21 20:33:10,000 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 101 transitions, 738 flow [2024-06-21 20:33:10,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:10,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:10,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:10,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:33:10,000 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)] === [2024-06-21 20:33:10,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:10,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1122144372, now seen corresponding path program 1 times [2024-06-21 20:33:10,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:10,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019394740] [2024-06-21 20:33:10,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:10,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:11,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:11,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019394740] [2024-06-21 20:33:11,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019394740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:11,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:11,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:33:11,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073262839] [2024-06-21 20:33:11,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:11,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:33:11,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:11,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:33:11,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:33:11,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:33:11,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 101 transitions, 738 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:11,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:11,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:33:11,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:13,067 INFO L124 PetriNetUnfolderBase]: 11020/15467 cut-off events. [2024-06-21 20:33:13,068 INFO L125 PetriNetUnfolderBase]: For 161470/161470 co-relation queries the response was YES. [2024-06-21 20:33:13,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71177 conditions, 15467 events. 11020/15467 cut-off events. For 161470/161470 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 87711 event pairs, 4612 based on Foata normal form. 6/15400 useless extension candidates. Maximal degree in co-relation 71145. Up to 14615 conditions per place. [2024-06-21 20:33:13,165 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 101 selfloop transitions, 44 changer transitions 0/156 dead transitions. [2024-06-21 20:33:13,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 156 transitions, 1261 flow [2024-06-21 20:33:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:33:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:33:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-21 20:33:13,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070754716981132 [2024-06-21 20:33:13,167 INFO L175 Difference]: Start difference. First operand has 88 places, 101 transitions, 738 flow. Second operand 8 states and 215 transitions. [2024-06-21 20:33:13,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 156 transitions, 1261 flow [2024-06-21 20:33:13,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 156 transitions, 1215 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 20:33:13,225 INFO L231 Difference]: Finished difference. Result has 95 places, 116 transitions, 941 flow [2024-06-21 20:33:13,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=941, PETRI_PLACES=95, PETRI_TRANSITIONS=116} [2024-06-21 20:33:13,225 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2024-06-21 20:33:13,225 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 116 transitions, 941 flow [2024-06-21 20:33:13,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:13,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:13,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:13,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:33:13,226 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:33:13,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:13,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1009179290, now seen corresponding path program 2 times [2024-06-21 20:33:13,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:13,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712527643] [2024-06-21 20:33:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:13,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:14,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:14,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:14,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712527643] [2024-06-21 20:33:14,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712527643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:14,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:14,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:33:14,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329239755] [2024-06-21 20:33:14,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:14,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:33:14,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:14,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:33:14,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:33:14,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:33:14,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 116 transitions, 941 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:14,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:14,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:33:14,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:16,129 INFO L124 PetriNetUnfolderBase]: 11097/15602 cut-off events. [2024-06-21 20:33:16,129 INFO L125 PetriNetUnfolderBase]: For 183458/183458 co-relation queries the response was YES. [2024-06-21 20:33:16,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74647 conditions, 15602 events. 11097/15602 cut-off events. For 183458/183458 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 88708 event pairs, 4163 based on Foata normal form. 6/15535 useless extension candidates. Maximal degree in co-relation 74612. Up to 14445 conditions per place. [2024-06-21 20:33:16,251 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 105 selfloop transitions, 55 changer transitions 0/171 dead transitions. [2024-06-21 20:33:16,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 171 transitions, 1577 flow [2024-06-21 20:33:16,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:33:16,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:33:16,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-21 20:33:16,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235849056603774 [2024-06-21 20:33:16,253 INFO L175 Difference]: Start difference. First operand has 95 places, 116 transitions, 941 flow. Second operand 8 states and 222 transitions. [2024-06-21 20:33:16,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 171 transitions, 1577 flow [2024-06-21 20:33:16,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 171 transitions, 1487 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 20:33:16,365 INFO L231 Difference]: Finished difference. Result has 101 places, 124 transitions, 1118 flow [2024-06-21 20:33:16,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1118, PETRI_PLACES=101, PETRI_TRANSITIONS=124} [2024-06-21 20:33:16,366 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-06-21 20:33:16,366 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 124 transitions, 1118 flow [2024-06-21 20:33:16,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:16,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:16,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:16,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:33:16,367 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:33:16,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:16,367 INFO L85 PathProgramCache]: Analyzing trace with hash 772707260, now seen corresponding path program 3 times [2024-06-21 20:33:16,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:16,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441199005] [2024-06-21 20:33:16,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:16,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:17,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:17,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441199005] [2024-06-21 20:33:17,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441199005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:17,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:17,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:33:17,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397148528] [2024-06-21 20:33:17,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:17,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:33:17,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:17,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:33:17,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:33:17,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:33:17,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 124 transitions, 1118 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:17,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:17,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:33:17,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:19,625 INFO L124 PetriNetUnfolderBase]: 11082/15581 cut-off events. [2024-06-21 20:33:19,625 INFO L125 PetriNetUnfolderBase]: For 208090/208090 co-relation queries the response was YES. [2024-06-21 20:33:19,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76940 conditions, 15581 events. 11082/15581 cut-off events. For 208090/208090 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 88691 event pairs, 4624 based on Foata normal form. 6/15514 useless extension candidates. Maximal degree in co-relation 76903. Up to 14713 conditions per place. [2024-06-21 20:33:19,789 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 110 selfloop transitions, 44 changer transitions 0/165 dead transitions. [2024-06-21 20:33:19,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 165 transitions, 1539 flow [2024-06-21 20:33:19,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:33:19,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:33:19,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-21 20:33:19,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070754716981132 [2024-06-21 20:33:19,791 INFO L175 Difference]: Start difference. First operand has 101 places, 124 transitions, 1118 flow. Second operand 8 states and 215 transitions. [2024-06-21 20:33:19,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 165 transitions, 1539 flow [2024-06-21 20:33:19,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 165 transitions, 1424 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 20:33:19,991 INFO L231 Difference]: Finished difference. Result has 106 places, 125 transitions, 1122 flow [2024-06-21 20:33:19,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1122, PETRI_PLACES=106, PETRI_TRANSITIONS=125} [2024-06-21 20:33:19,992 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2024-06-21 20:33:19,992 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 125 transitions, 1122 flow [2024-06-21 20:33:19,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:19,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:19,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:19,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:33:19,992 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:33:19,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:19,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1436116342, now seen corresponding path program 2 times [2024-06-21 20:33:19,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:19,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000861217] [2024-06-21 20:33:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:19,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:20,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:20,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:20,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000861217] [2024-06-21 20:33:20,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000861217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:20,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:20,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:33:20,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915032812] [2024-06-21 20:33:20,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:20,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:33:20,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:20,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:33:20,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:33:20,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 20:33:20,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 125 transitions, 1122 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:20,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:20,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 20:33:20,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:22,419 INFO L124 PetriNetUnfolderBase]: 11605/16125 cut-off events. [2024-06-21 20:33:22,419 INFO L125 PetriNetUnfolderBase]: For 218586/218600 co-relation queries the response was YES. [2024-06-21 20:33:22,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79448 conditions, 16125 events. 11605/16125 cut-off events. For 218586/218600 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 89614 event pairs, 5059 based on Foata normal form. 12/16133 useless extension candidates. Maximal degree in co-relation 79408. Up to 15746 conditions per place. [2024-06-21 20:33:22,562 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 115 selfloop transitions, 21 changer transitions 0/143 dead transitions. [2024-06-21 20:33:22,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 143 transitions, 1440 flow [2024-06-21 20:33:22,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:33:22,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:33:22,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 20:33:22,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-21 20:33:22,563 INFO L175 Difference]: Start difference. First operand has 106 places, 125 transitions, 1122 flow. Second operand 6 states and 147 transitions. [2024-06-21 20:33:22,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 143 transitions, 1440 flow [2024-06-21 20:33:22,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 143 transitions, 1312 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 20:33:22,757 INFO L231 Difference]: Finished difference. Result has 107 places, 125 transitions, 1045 flow [2024-06-21 20:33:22,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1045, PETRI_PLACES=107, PETRI_TRANSITIONS=125} [2024-06-21 20:33:22,758 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-06-21 20:33:22,758 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 125 transitions, 1045 flow [2024-06-21 20:33:22,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:22,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:22,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:22,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:33:22,758 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:33:22,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:22,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1435914904, now seen corresponding path program 1 times [2024-06-21 20:33:22,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:22,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137187378] [2024-06-21 20:33:22,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:22,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:23,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:23,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:23,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137187378] [2024-06-21 20:33:23,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137187378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:23,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:23,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:33:23,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775395435] [2024-06-21 20:33:23,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:23,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:33:23,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:23,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:33:23,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:33:23,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:33:23,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 125 transitions, 1045 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:23,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:23,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:33:23,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:25,242 INFO L124 PetriNetUnfolderBase]: 10226/14563 cut-off events. [2024-06-21 20:33:25,242 INFO L125 PetriNetUnfolderBase]: For 202699/202705 co-relation queries the response was YES. [2024-06-21 20:33:25,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71778 conditions, 14563 events. 10226/14563 cut-off events. For 202699/202705 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 83726 event pairs, 4306 based on Foata normal form. 6/14536 useless extension candidates. Maximal degree in co-relation 71737. Up to 13926 conditions per place. [2024-06-21 20:33:25,360 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 127 selfloop transitions, 21 changer transitions 0/156 dead transitions. [2024-06-21 20:33:25,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 156 transitions, 1555 flow [2024-06-21 20:33:25,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:33:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:33:25,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 20:33:25,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4937106918238994 [2024-06-21 20:33:25,363 INFO L175 Difference]: Start difference. First operand has 107 places, 125 transitions, 1045 flow. Second operand 6 states and 157 transitions. [2024-06-21 20:33:25,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 156 transitions, 1555 flow [2024-06-21 20:33:25,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 156 transitions, 1496 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 20:33:25,487 INFO L231 Difference]: Finished difference. Result has 108 places, 133 transitions, 1133 flow [2024-06-21 20:33:25,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=986, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1133, PETRI_PLACES=108, PETRI_TRANSITIONS=133} [2024-06-21 20:33:25,488 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-21 20:33:25,488 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 133 transitions, 1133 flow [2024-06-21 20:33:25,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:25,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:25,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:25,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:33:25,489 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:33:25,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:25,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1999970472, now seen corresponding path program 2 times [2024-06-21 20:33:25,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:25,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331722346] [2024-06-21 20:33:25,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:25,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:26,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:26,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331722346] [2024-06-21 20:33:26,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331722346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:26,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:26,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:33:26,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996648149] [2024-06-21 20:33:26,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:26,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:33:26,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:26,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:33:26,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:33:26,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:33:26,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 133 transitions, 1133 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:26,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:26,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:33:26,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:28,070 INFO L124 PetriNetUnfolderBase]: 10219/14555 cut-off events. [2024-06-21 20:33:28,070 INFO L125 PetriNetUnfolderBase]: For 227584/227589 co-relation queries the response was YES. [2024-06-21 20:33:28,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74882 conditions, 14555 events. 10219/14555 cut-off events. For 227584/227589 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 83688 event pairs, 4309 based on Foata normal form. 6/14528 useless extension candidates. Maximal degree in co-relation 74840. Up to 13919 conditions per place. [2024-06-21 20:33:28,178 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 122 selfloop transitions, 21 changer transitions 0/151 dead transitions. [2024-06-21 20:33:28,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 151 transitions, 1465 flow [2024-06-21 20:33:28,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:33:28,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:33:28,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 20:33:28,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779874213836478 [2024-06-21 20:33:28,179 INFO L175 Difference]: Start difference. First operand has 108 places, 133 transitions, 1133 flow. Second operand 6 states and 152 transitions. [2024-06-21 20:33:28,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 151 transitions, 1465 flow [2024-06-21 20:33:28,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 151 transitions, 1362 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-21 20:33:28,305 INFO L231 Difference]: Finished difference. Result has 111 places, 133 transitions, 1081 flow [2024-06-21 20:33:28,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1030, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1081, PETRI_PLACES=111, PETRI_TRANSITIONS=133} [2024-06-21 20:33:28,305 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-06-21 20:33:28,305 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 133 transitions, 1081 flow [2024-06-21 20:33:28,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:28,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:28,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:28,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:33:28,306 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:33:28,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:28,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1808571832, now seen corresponding path program 1 times [2024-06-21 20:33:28,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:28,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481022620] [2024-06-21 20:33:28,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:28,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:29,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:29,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481022620] [2024-06-21 20:33:29,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481022620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:29,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:29,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:33:29,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150972863] [2024-06-21 20:33:29,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:29,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:33:29,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:29,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:33:29,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:33:29,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 20:33:29,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 133 transitions, 1081 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:29,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:29,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 20:33:29,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:31,270 INFO L124 PetriNetUnfolderBase]: 11669/16225 cut-off events. [2024-06-21 20:33:31,271 INFO L125 PetriNetUnfolderBase]: For 285153/285164 co-relation queries the response was YES. [2024-06-21 20:33:31,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84617 conditions, 16225 events. 11669/16225 cut-off events. For 285153/285164 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 90330 event pairs, 4988 based on Foata normal form. 12/16231 useless extension candidates. Maximal degree in co-relation 84574. Up to 15602 conditions per place. [2024-06-21 20:33:31,394 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 130 selfloop transitions, 52 changer transitions 0/189 dead transitions. [2024-06-21 20:33:31,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 189 transitions, 1886 flow [2024-06-21 20:33:31,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:33:31,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:33:31,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-21 20:33:31,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121293800539084 [2024-06-21 20:33:31,398 INFO L175 Difference]: Start difference. First operand has 111 places, 133 transitions, 1081 flow. Second operand 7 states and 190 transitions. [2024-06-21 20:33:31,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 189 transitions, 1886 flow [2024-06-21 20:33:31,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 189 transitions, 1831 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 20:33:31,562 INFO L231 Difference]: Finished difference. Result has 115 places, 151 transitions, 1394 flow [2024-06-21 20:33:31,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1394, PETRI_PLACES=115, PETRI_TRANSITIONS=151} [2024-06-21 20:33:31,562 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 59 predicate places. [2024-06-21 20:33:31,562 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 151 transitions, 1394 flow [2024-06-21 20:33:31,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:31,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:31,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:31,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:33:31,564 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:33:31,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:31,564 INFO L85 PathProgramCache]: Analyzing trace with hash -226182346, now seen corresponding path program 1 times [2024-06-21 20:33:31,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:31,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485705198] [2024-06-21 20:33:31,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:31,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:31,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:32,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:32,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485705198] [2024-06-21 20:33:32,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485705198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:32,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:32,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:33:32,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270496924] [2024-06-21 20:33:32,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:32,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:33:32,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:32,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:33:32,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:33:32,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:33:32,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 151 transitions, 1394 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:32,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:32,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:33:32,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:34,949 INFO L124 PetriNetUnfolderBase]: 11599/16298 cut-off events. [2024-06-21 20:33:34,949 INFO L125 PetriNetUnfolderBase]: For 341932/342026 co-relation queries the response was YES. [2024-06-21 20:33:35,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91066 conditions, 16298 events. 11599/16298 cut-off events. For 341932/342026 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 93174 event pairs, 4694 based on Foata normal form. 18/16107 useless extension candidates. Maximal degree in co-relation 91020. Up to 14887 conditions per place. [2024-06-21 20:33:35,090 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 139 selfloop transitions, 53 changer transitions 0/208 dead transitions. [2024-06-21 20:33:35,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 208 transitions, 2015 flow [2024-06-21 20:33:35,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:33:35,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:33:35,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-21 20:33:35,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-21 20:33:35,092 INFO L175 Difference]: Start difference. First operand has 115 places, 151 transitions, 1394 flow. Second operand 8 states and 220 transitions. [2024-06-21 20:33:35,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 208 transitions, 2015 flow [2024-06-21 20:33:35,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 208 transitions, 1915 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-21 20:33:35,284 INFO L231 Difference]: Finished difference. Result has 122 places, 160 transitions, 1563 flow [2024-06-21 20:33:35,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1563, PETRI_PLACES=122, PETRI_TRANSITIONS=160} [2024-06-21 20:33:35,285 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 66 predicate places. [2024-06-21 20:33:35,285 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 160 transitions, 1563 flow [2024-06-21 20:33:35,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:35,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:35,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:35,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:33:35,286 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:33:35,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:35,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1215671908, now seen corresponding path program 2 times [2024-06-21 20:33:35,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:35,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679367127] [2024-06-21 20:33:35,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:35,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:35,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:36,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:36,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679367127] [2024-06-21 20:33:36,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679367127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:36,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:36,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:33:36,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486491465] [2024-06-21 20:33:36,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:36,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:33:36,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:36,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:33:36,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:33:36,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 20:33:36,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 160 transitions, 1563 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:36,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:36,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 20:33:36,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:38,314 INFO L124 PetriNetUnfolderBase]: 11994/16732 cut-off events. [2024-06-21 20:33:38,314 INFO L125 PetriNetUnfolderBase]: For 351698/351709 co-relation queries the response was YES. [2024-06-21 20:33:38,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93636 conditions, 16732 events. 11994/16732 cut-off events. For 351698/351709 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 93784 event pairs, 5032 based on Foata normal form. 12/16738 useless extension candidates. Maximal degree in co-relation 93587. Up to 16041 conditions per place. [2024-06-21 20:33:38,462 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 137 selfloop transitions, 58 changer transitions 0/202 dead transitions. [2024-06-21 20:33:38,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 202 transitions, 2327 flow [2024-06-21 20:33:38,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:33:38,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:33:38,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 20:33:38,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-21 20:33:38,463 INFO L175 Difference]: Start difference. First operand has 122 places, 160 transitions, 1563 flow. Second operand 7 states and 184 transitions. [2024-06-21 20:33:38,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 202 transitions, 2327 flow [2024-06-21 20:33:38,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 202 transitions, 2237 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 20:33:38,761 INFO L231 Difference]: Finished difference. Result has 127 places, 170 transitions, 1747 flow [2024-06-21 20:33:38,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1747, PETRI_PLACES=127, PETRI_TRANSITIONS=170} [2024-06-21 20:33:38,762 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-21 20:33:38,762 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 170 transitions, 1747 flow [2024-06-21 20:33:38,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:38,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:38,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:38,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:33:38,763 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:33:38,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:38,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1215672280, now seen corresponding path program 1 times [2024-06-21 20:33:38,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:38,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371885399] [2024-06-21 20:33:38,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:38,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:39,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:39,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371885399] [2024-06-21 20:33:39,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371885399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:39,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:39,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:33:39,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682500590] [2024-06-21 20:33:39,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:39,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:33:39,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:39,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:33:39,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:33:39,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 20:33:39,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 170 transitions, 1747 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:39,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:39,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 20:33:39,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:41,996 INFO L124 PetriNetUnfolderBase]: 12026/16772 cut-off events. [2024-06-21 20:33:41,996 INFO L125 PetriNetUnfolderBase]: For 376231/376231 co-relation queries the response was YES. [2024-06-21 20:33:42,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94949 conditions, 16772 events. 12026/16772 cut-off events. For 376231/376231 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 93845 event pairs, 4971 based on Foata normal form. 4/16770 useless extension candidates. Maximal degree in co-relation 94898. Up to 16273 conditions per place. [2024-06-21 20:33:42,173 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 173 selfloop transitions, 31 changer transitions 0/211 dead transitions. [2024-06-21 20:33:42,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 211 transitions, 2449 flow [2024-06-21 20:33:42,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:33:42,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:33:42,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 20:33:42,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48787061994609165 [2024-06-21 20:33:42,174 INFO L175 Difference]: Start difference. First operand has 127 places, 170 transitions, 1747 flow. Second operand 7 states and 181 transitions. [2024-06-21 20:33:42,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 211 transitions, 2449 flow [2024-06-21 20:33:42,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 211 transitions, 2339 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-21 20:33:42,490 INFO L231 Difference]: Finished difference. Result has 131 places, 178 transitions, 1840 flow [2024-06-21 20:33:42,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1840, PETRI_PLACES=131, PETRI_TRANSITIONS=178} [2024-06-21 20:33:42,490 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-06-21 20:33:42,490 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 178 transitions, 1840 flow [2024-06-21 20:33:42,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:42,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:42,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:42,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:33:42,491 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)] === [2024-06-21 20:33:42,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:42,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1210592054, now seen corresponding path program 2 times [2024-06-21 20:33:42,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:42,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340683049] [2024-06-21 20:33:42,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:42,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:43,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:43,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340683049] [2024-06-21 20:33:43,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340683049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:43,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:43,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:33:43,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442450753] [2024-06-21 20:33:43,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:43,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:33:43,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:43,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:33:43,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:33:43,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:33:43,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 178 transitions, 1840 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:43,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:43,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:33:43,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:45,746 INFO L124 PetriNetUnfolderBase]: 11694/16422 cut-off events. [2024-06-21 20:33:45,747 INFO L125 PetriNetUnfolderBase]: For 434236/434330 co-relation queries the response was YES. [2024-06-21 20:33:45,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97163 conditions, 16422 events. 11694/16422 cut-off events. For 434236/434330 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 93765 event pairs, 3352 based on Foata normal form. 18/16203 useless extension candidates. Maximal degree in co-relation 97111. Up to 14304 conditions per place. [2024-06-21 20:33:45,884 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 141 selfloop transitions, 61 changer transitions 0/220 dead transitions. [2024-06-21 20:33:45,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 220 transitions, 2362 flow [2024-06-21 20:33:45,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:33:45,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:33:45,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-21 20:33:45,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-21 20:33:45,887 INFO L175 Difference]: Start difference. First operand has 131 places, 178 transitions, 1840 flow. Second operand 7 states and 196 transitions. [2024-06-21 20:33:45,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 220 transitions, 2362 flow [2024-06-21 20:33:46,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 220 transitions, 2272 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-21 20:33:46,197 INFO L231 Difference]: Finished difference. Result has 135 places, 178 transitions, 1885 flow [2024-06-21 20:33:46,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1750, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1885, PETRI_PLACES=135, PETRI_TRANSITIONS=178} [2024-06-21 20:33:46,198 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-06-21 20:33:46,198 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 178 transitions, 1885 flow [2024-06-21 20:33:46,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:46,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:46,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:46,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:33:46,198 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:33:46,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:46,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1403042106, now seen corresponding path program 3 times [2024-06-21 20:33:46,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:46,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401581457] [2024-06-21 20:33:46,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:46,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:46,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:47,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:47,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401581457] [2024-06-21 20:33:47,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401581457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:47,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:47,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:33:47,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53186696] [2024-06-21 20:33:47,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:47,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:33:47,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:47,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:33:47,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:33:47,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:33:47,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 178 transitions, 1885 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:47,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:47,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:33:47,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:49,282 INFO L124 PetriNetUnfolderBase]: 11610/16316 cut-off events. [2024-06-21 20:33:49,282 INFO L125 PetriNetUnfolderBase]: For 453209/453303 co-relation queries the response was YES. [2024-06-21 20:33:49,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97797 conditions, 16316 events. 11610/16316 cut-off events. For 453209/453303 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 93174 event pairs, 2823 based on Foata normal form. 18/16148 useless extension candidates. Maximal degree in co-relation 97743. Up to 14000 conditions per place. [2024-06-21 20:33:49,503 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 135 selfloop transitions, 63 changer transitions 0/216 dead transitions. [2024-06-21 20:33:49,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 216 transitions, 2397 flow [2024-06-21 20:33:49,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:33:49,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:33:49,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-21 20:33:49,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-21 20:33:49,505 INFO L175 Difference]: Start difference. First operand has 135 places, 178 transitions, 1885 flow. Second operand 7 states and 189 transitions. [2024-06-21 20:33:49,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 216 transitions, 2397 flow [2024-06-21 20:33:49,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 216 transitions, 2235 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 20:33:49,833 INFO L231 Difference]: Finished difference. Result has 135 places, 179 transitions, 1872 flow [2024-06-21 20:33:49,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1872, PETRI_PLACES=135, PETRI_TRANSITIONS=179} [2024-06-21 20:33:49,834 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-06-21 20:33:49,834 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 179 transitions, 1872 flow [2024-06-21 20:33:49,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:49,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:49,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:49,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:33:49,835 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:33:49,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:49,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1566379534, now seen corresponding path program 2 times [2024-06-21 20:33:49,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:49,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666316295] [2024-06-21 20:33:49,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:49,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:50,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:50,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666316295] [2024-06-21 20:33:50,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666316295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:50,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:50,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:33:50,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140344352] [2024-06-21 20:33:50,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:50,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:33:50,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:50,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:33:50,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:33:50,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 20:33:50,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 179 transitions, 1872 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:50,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:50,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 20:33:50,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:52,856 INFO L124 PetriNetUnfolderBase]: 11980/16707 cut-off events. [2024-06-21 20:33:52,857 INFO L125 PetriNetUnfolderBase]: For 439177/439193 co-relation queries the response was YES. [2024-06-21 20:33:52,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99433 conditions, 16707 events. 11980/16707 cut-off events. For 439177/439193 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 93478 event pairs, 4929 based on Foata normal form. 16/16719 useless extension candidates. Maximal degree in co-relation 99378. Up to 16188 conditions per place. [2024-06-21 20:33:53,044 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 166 selfloop transitions, 36 changer transitions 0/209 dead transitions. [2024-06-21 20:33:53,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 209 transitions, 2504 flow [2024-06-21 20:33:53,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:33:53,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:33:53,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 20:33:53,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636118598382749 [2024-06-21 20:33:53,046 INFO L175 Difference]: Start difference. First operand has 135 places, 179 transitions, 1872 flow. Second operand 7 states and 172 transitions. [2024-06-21 20:33:53,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 209 transitions, 2504 flow [2024-06-21 20:33:53,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 209 transitions, 2347 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 20:33:53,373 INFO L231 Difference]: Finished difference. Result has 137 places, 183 transitions, 1864 flow [2024-06-21 20:33:53,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1864, PETRI_PLACES=137, PETRI_TRANSITIONS=183} [2024-06-21 20:33:53,374 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 81 predicate places. [2024-06-21 20:33:53,374 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 183 transitions, 1864 flow [2024-06-21 20:33:53,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:53,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:53,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:53,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:33:53,375 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:33:53,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:53,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1569935320, now seen corresponding path program 3 times [2024-06-21 20:33:53,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:53,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294459959] [2024-06-21 20:33:53,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:53,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:54,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:54,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:54,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294459959] [2024-06-21 20:33:54,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294459959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:54,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:54,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:33:54,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575788231] [2024-06-21 20:33:54,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:54,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:33:54,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:54,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:33:54,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:33:54,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 20:33:54,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 183 transitions, 1864 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:54,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:54,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 20:33:54,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:56,580 INFO L124 PetriNetUnfolderBase]: 11966/16689 cut-off events. [2024-06-21 20:33:56,580 INFO L125 PetriNetUnfolderBase]: For 462234/462250 co-relation queries the response was YES. [2024-06-21 20:33:56,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99540 conditions, 16689 events. 11966/16689 cut-off events. For 462234/462250 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 93300 event pairs, 4927 based on Foata normal form. 16/16701 useless extension candidates. Maximal degree in co-relation 99484. Up to 16176 conditions per place. [2024-06-21 20:33:56,805 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 166 selfloop transitions, 35 changer transitions 0/208 dead transitions. [2024-06-21 20:33:56,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 208 transitions, 2328 flow [2024-06-21 20:33:56,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:33:56,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:33:56,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 20:33:56,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636118598382749 [2024-06-21 20:33:56,807 INFO L175 Difference]: Start difference. First operand has 137 places, 183 transitions, 1864 flow. Second operand 7 states and 172 transitions. [2024-06-21 20:33:56,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 208 transitions, 2328 flow [2024-06-21 20:33:57,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 208 transitions, 2172 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-21 20:33:57,210 INFO L231 Difference]: Finished difference. Result has 140 places, 183 transitions, 1787 flow [2024-06-21 20:33:57,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1708, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1787, PETRI_PLACES=140, PETRI_TRANSITIONS=183} [2024-06-21 20:33:57,211 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2024-06-21 20:33:57,211 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 183 transitions, 1787 flow [2024-06-21 20:33:57,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:57,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:57,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:57,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:33:57,212 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)] === [2024-06-21 20:33:57,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:57,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1569934948, now seen corresponding path program 3 times [2024-06-21 20:33:57,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:57,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557283344] [2024-06-21 20:33:57,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:57,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:58,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:58,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557283344] [2024-06-21 20:33:58,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557283344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:58,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:58,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:33:58,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951593959] [2024-06-21 20:33:58,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:58,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:33:58,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:58,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:33:58,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:33:58,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 20:33:58,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 183 transitions, 1787 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:58,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:58,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 20:33:58,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:01,145 INFO L124 PetriNetUnfolderBase]: 11957/16678 cut-off events. [2024-06-21 20:34:01,146 INFO L125 PetriNetUnfolderBase]: For 489213/489227 co-relation queries the response was YES. [2024-06-21 20:34:01,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100187 conditions, 16678 events. 11957/16678 cut-off events. For 489213/489227 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 93408 event pairs, 5003 based on Foata normal form. 14/16680 useless extension candidates. Maximal degree in co-relation 100130. Up to 15988 conditions per place. [2024-06-21 20:34:01,349 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 144 selfloop transitions, 58 changer transitions 0/209 dead transitions. [2024-06-21 20:34:01,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 209 transitions, 2463 flow [2024-06-21 20:34:01,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:34:01,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:34:01,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:34:01,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-21 20:34:01,351 INFO L175 Difference]: Start difference. First operand has 140 places, 183 transitions, 1787 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:34:01,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 209 transitions, 2463 flow [2024-06-21 20:34:01,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 209 transitions, 2339 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 20:34:01,666 INFO L231 Difference]: Finished difference. Result has 140 places, 183 transitions, 1790 flow [2024-06-21 20:34:01,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1790, PETRI_PLACES=140, PETRI_TRANSITIONS=183} [2024-06-21 20:34:01,671 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2024-06-21 20:34:01,671 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 183 transitions, 1790 flow [2024-06-21 20:34:01,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:01,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:01,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:01,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:34:01,672 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:34:01,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:01,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1539606588, now seen corresponding path program 1 times [2024-06-21 20:34:01,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:01,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768200204] [2024-06-21 20:34:01,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:01,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:02,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:02,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768200204] [2024-06-21 20:34:02,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768200204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:02,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:02,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:34:02,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525870174] [2024-06-21 20:34:02,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:02,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:34:02,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:02,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:34:02,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:34:02,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:34:02,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 183 transitions, 1790 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:02,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:02,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:34:02,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:05,016 INFO L124 PetriNetUnfolderBase]: 10578/15117 cut-off events. [2024-06-21 20:34:05,017 INFO L125 PetriNetUnfolderBase]: For 443917/443917 co-relation queries the response was YES. [2024-06-21 20:34:05,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90614 conditions, 15117 events. 10578/15117 cut-off events. For 443917/443917 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 87573 event pairs, 4216 based on Foata normal form. 2/15077 useless extension candidates. Maximal degree in co-relation 90556. Up to 14427 conditions per place. [2024-06-21 20:34:05,158 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 189 selfloop transitions, 18 changer transitions 0/215 dead transitions. [2024-06-21 20:34:05,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 215 transitions, 2334 flow [2024-06-21 20:34:05,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:34:05,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:34:05,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 20:34:05,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-21 20:34:05,160 INFO L175 Difference]: Start difference. First operand has 140 places, 183 transitions, 1790 flow. Second operand 7 states and 177 transitions. [2024-06-21 20:34:05,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 215 transitions, 2334 flow [2024-06-21 20:34:05,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 215 transitions, 2177 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 20:34:05,516 INFO L231 Difference]: Finished difference. Result has 141 places, 187 transitions, 1744 flow [2024-06-21 20:34:05,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1633, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1744, PETRI_PLACES=141, PETRI_TRANSITIONS=187} [2024-06-21 20:34:05,518 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 85 predicate places. [2024-06-21 20:34:05,518 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 187 transitions, 1744 flow [2024-06-21 20:34:05,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:05,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:05,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:05,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:34:05,519 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:34:05,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:05,519 INFO L85 PathProgramCache]: Analyzing trace with hash -2069909496, now seen corresponding path program 2 times [2024-06-21 20:34:05,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:05,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428090708] [2024-06-21 20:34:05,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:05,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:06,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:06,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428090708] [2024-06-21 20:34:06,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428090708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:06,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:06,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:34:06,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621118504] [2024-06-21 20:34:06,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:06,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:34:06,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:06,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:34:06,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:34:06,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:34:06,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 187 transitions, 1744 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:06,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:06,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:34:06,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:09,153 INFO L124 PetriNetUnfolderBase]: 10594/15216 cut-off events. [2024-06-21 20:34:09,153 INFO L125 PetriNetUnfolderBase]: For 481281/481284 co-relation queries the response was YES. [2024-06-21 20:34:09,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93335 conditions, 15216 events. 10594/15216 cut-off events. For 481281/481284 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 89010 event pairs, 4214 based on Foata normal form. 4/15183 useless extension candidates. Maximal degree in co-relation 93278. Up to 14401 conditions per place. [2024-06-21 20:34:09,404 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 179 selfloop transitions, 35 changer transitions 0/222 dead transitions. [2024-06-21 20:34:09,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 222 transitions, 2484 flow [2024-06-21 20:34:09,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:34:09,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:34:09,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 20:34:09,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48517520215633425 [2024-06-21 20:34:09,405 INFO L175 Difference]: Start difference. First operand has 141 places, 187 transitions, 1744 flow. Second operand 7 states and 180 transitions. [2024-06-21 20:34:09,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 222 transitions, 2484 flow [2024-06-21 20:34:09,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 222 transitions, 2403 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 20:34:09,751 INFO L231 Difference]: Finished difference. Result has 143 places, 195 transitions, 1882 flow [2024-06-21 20:34:09,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1882, PETRI_PLACES=143, PETRI_TRANSITIONS=195} [2024-06-21 20:34:09,761 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 87 predicate places. [2024-06-21 20:34:09,761 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 195 transitions, 1882 flow [2024-06-21 20:34:09,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:09,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:09,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:09,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:34:09,762 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:34:09,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:09,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1392988312, now seen corresponding path program 1 times [2024-06-21 20:34:09,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:09,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51066099] [2024-06-21 20:34:09,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:09,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:10,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:10,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:10,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51066099] [2024-06-21 20:34:10,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51066099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:10,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:10,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:34:10,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949437093] [2024-06-21 20:34:10,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:10,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:34:10,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:10,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:34:10,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:34:10,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:34:10,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 195 transitions, 1882 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:10,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:10,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:34:10,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:13,177 INFO L124 PetriNetUnfolderBase]: 10626/15249 cut-off events. [2024-06-21 20:34:13,178 INFO L125 PetriNetUnfolderBase]: For 523331/523331 co-relation queries the response was YES. [2024-06-21 20:34:13,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96721 conditions, 15249 events. 10626/15249 cut-off events. For 523331/523331 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 89044 event pairs, 4188 based on Foata normal form. 4/15208 useless extension candidates. Maximal degree in co-relation 96663. Up to 14417 conditions per place. [2024-06-21 20:34:13,325 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 194 selfloop transitions, 31 changer transitions 0/233 dead transitions. [2024-06-21 20:34:13,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 233 transitions, 2650 flow [2024-06-21 20:34:13,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:34:13,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:34:13,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 20:34:13,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-21 20:34:13,340 INFO L175 Difference]: Start difference. First operand has 143 places, 195 transitions, 1882 flow. Second operand 7 states and 183 transitions. [2024-06-21 20:34:13,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 233 transitions, 2650 flow [2024-06-21 20:34:13,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 233 transitions, 2560 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-21 20:34:13,705 INFO L231 Difference]: Finished difference. Result has 147 places, 203 transitions, 1999 flow [2024-06-21 20:34:13,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1999, PETRI_PLACES=147, PETRI_TRANSITIONS=203} [2024-06-21 20:34:13,705 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 91 predicate places. [2024-06-21 20:34:13,706 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 203 transitions, 1999 flow [2024-06-21 20:34:13,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:13,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:13,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:13,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:34:13,706 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:34:13,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:13,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1869303660, now seen corresponding path program 2 times [2024-06-21 20:34:13,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:13,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083336839] [2024-06-21 20:34:13,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:13,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:14,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:14,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083336839] [2024-06-21 20:34:14,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083336839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:14,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:14,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:34:14,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089613507] [2024-06-21 20:34:14,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:14,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:34:14,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:14,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:34:14,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:34:14,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:34:14,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 203 transitions, 1999 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:14,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:14,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:34:14,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:17,321 INFO L124 PetriNetUnfolderBase]: 10658/15299 cut-off events. [2024-06-21 20:34:17,321 INFO L125 PetriNetUnfolderBase]: For 558439/558444 co-relation queries the response was YES. [2024-06-21 20:34:17,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99569 conditions, 15299 events. 10658/15299 cut-off events. For 558439/558444 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 89358 event pairs, 4163 based on Foata normal form. 8/15268 useless extension candidates. Maximal degree in co-relation 99509. Up to 14446 conditions per place. [2024-06-21 20:34:17,480 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 189 selfloop transitions, 36 changer transitions 0/233 dead transitions. [2024-06-21 20:34:17,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 233 transitions, 2703 flow [2024-06-21 20:34:17,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:34:17,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:34:17,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:34:17,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-21 20:34:17,482 INFO L175 Difference]: Start difference. First operand has 147 places, 203 transitions, 1999 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:34:17,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 233 transitions, 2703 flow [2024-06-21 20:34:17,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 233 transitions, 2619 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-21 20:34:17,875 INFO L231 Difference]: Finished difference. Result has 151 places, 207 transitions, 2066 flow [2024-06-21 20:34:17,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1921, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2066, PETRI_PLACES=151, PETRI_TRANSITIONS=207} [2024-06-21 20:34:17,876 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 95 predicate places. [2024-06-21 20:34:17,877 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 207 transitions, 2066 flow [2024-06-21 20:34:17,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:17,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:17,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:17,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:34:17,877 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:34:17,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:17,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1570119646, now seen corresponding path program 3 times [2024-06-21 20:34:17,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:17,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529323007] [2024-06-21 20:34:17,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:17,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:18,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:18,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:18,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529323007] [2024-06-21 20:34:18,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529323007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:18,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:18,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:34:18,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976422521] [2024-06-21 20:34:18,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:18,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:34:18,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:18,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:34:18,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:34:18,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:34:18,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 207 transitions, 2066 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:18,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:18,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:34:18,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:21,629 INFO L124 PetriNetUnfolderBase]: 10651/15287 cut-off events. [2024-06-21 20:34:21,629 INFO L125 PetriNetUnfolderBase]: For 586376/586378 co-relation queries the response was YES. [2024-06-21 20:34:21,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100473 conditions, 15287 events. 10651/15287 cut-off events. For 586376/586378 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 89455 event pairs, 4210 based on Foata normal form. 2/15248 useless extension candidates. Maximal degree in co-relation 100411. Up to 14478 conditions per place. [2024-06-21 20:34:21,760 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 186 selfloop transitions, 35 changer transitions 0/229 dead transitions. [2024-06-21 20:34:21,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 229 transitions, 2564 flow [2024-06-21 20:34:21,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:34:21,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:34:21,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 20:34:21,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-21 20:34:21,761 INFO L175 Difference]: Start difference. First operand has 151 places, 207 transitions, 2066 flow. Second operand 7 states and 175 transitions. [2024-06-21 20:34:21,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 229 transitions, 2564 flow [2024-06-21 20:34:22,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 229 transitions, 2412 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-21 20:34:22,157 INFO L231 Difference]: Finished difference. Result has 154 places, 207 transitions, 1993 flow [2024-06-21 20:34:22,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1914, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1993, PETRI_PLACES=154, PETRI_TRANSITIONS=207} [2024-06-21 20:34:22,158 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 98 predicate places. [2024-06-21 20:34:22,158 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 207 transitions, 1993 flow [2024-06-21 20:34:22,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:22,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:22,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:22,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:34:22,159 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:34:22,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:22,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1570119832, now seen corresponding path program 3 times [2024-06-21 20:34:22,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:22,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160118662] [2024-06-21 20:34:22,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:22,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:23,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:23,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160118662] [2024-06-21 20:34:23,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160118662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:23,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:23,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:34:23,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677250217] [2024-06-21 20:34:23,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:23,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:34:23,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:23,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:34:23,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:34:23,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:34:23,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 207 transitions, 1993 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:23,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:23,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:34:23,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:25,527 INFO L124 PetriNetUnfolderBase]: 10637/15254 cut-off events. [2024-06-21 20:34:25,528 INFO L125 PetriNetUnfolderBase]: For 613789/613794 co-relation queries the response was YES. [2024-06-21 20:34:25,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100914 conditions, 15254 events. 10637/15254 cut-off events. For 613789/613794 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 88855 event pairs, 4161 based on Foata normal form. 8/15223 useless extension candidates. Maximal degree in co-relation 100851. Up to 14425 conditions per place. [2024-06-21 20:34:25,727 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 189 selfloop transitions, 35 changer transitions 0/232 dead transitions. [2024-06-21 20:34:25,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 232 transitions, 2503 flow [2024-06-21 20:34:25,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:34:25,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:34:25,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:34:25,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-21 20:34:25,729 INFO L175 Difference]: Start difference. First operand has 154 places, 207 transitions, 1993 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:34:25,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 232 transitions, 2503 flow [2024-06-21 20:34:26,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 232 transitions, 2363 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 20:34:26,284 INFO L231 Difference]: Finished difference. Result has 154 places, 207 transitions, 1932 flow [2024-06-21 20:34:26,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1932, PETRI_PLACES=154, PETRI_TRANSITIONS=207} [2024-06-21 20:34:26,285 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 98 predicate places. [2024-06-21 20:34:26,285 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 207 transitions, 1932 flow [2024-06-21 20:34:26,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:26,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:26,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:26,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:34:26,285 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:34:26,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:26,286 INFO L85 PathProgramCache]: Analyzing trace with hash 497354746, now seen corresponding path program 1 times [2024-06-21 20:34:26,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:26,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85816509] [2024-06-21 20:34:26,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:26,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:27,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:27,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85816509] [2024-06-21 20:34:27,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85816509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:27,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:27,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:34:27,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950283356] [2024-06-21 20:34:27,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:27,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:34:27,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:27,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:34:27,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:34:27,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-21 20:34:27,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 207 transitions, 1932 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:27,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:27,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-21 20:34:27,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand